Things to Do in Key West in August

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Stay in Key West in August

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August in Key West is a direct trade. You get the lowest visitor counts and cheapest accommodation of the year, paired with the height of Atlantic hurricane season. The humidity hits the moment you step off the plane at Key West International Airport, and Duval Street at noon feels like a steam room. Mornings stay clear and bright until about 10 a.m., then the afternoon cloudbursts that build over the Gulf of Mexico bring brief, heavy relief.

Cruise ship arrivals at the Outer Mole Pier slow from their winter peak, and restaurant tables along the Historic Seaport waterfront open up without a wait. Florida's spiny lobster season starts on August 6, putting the freshest local catch on plates from the raw bars at the harbor to the Caribbean kitchens on Petronia Street in Bahama Village. Old Town loses its tourist polish and takes on an easier, sweatier local rhythm. The Hemingway House on Whitehead Street still runs tours past the famous six-toed cats, the Mel Fisher Maritime Heritage Museum still has the Atocha treasure on display, but you might find yourself alone in the gallery with nothing but the hum of the air conditioning.

If you can handle the climate and keep NOAA's National Hurricane Center bookmarked, August rewards the trade-off. The roosters on Whitehead Street crow for an audience of two instead of twenty. Mind you, this is a calculated gamble, and the Overseas Highway is the only road home. Travel insurance covering hurricane disruption is strongly recommended for any Keys trip between June and November.

Why visit in August

Florida's spiny lobster season opens August 6, flooding restaurants across Old Town with the freshest, most abundant supply of the year within days of the opener. Half Shell Raw Bar, Conch Republic Seafood Company, and smaller spots in Bahama Village all compete on specials.
Hotel and guesthouse rates across the island sit at their annual floor, making this the most affordable month to stay in Old Town, Truman Annex, or along South Roosevelt Boulevard.
Crowds shrink noticeably. The Hemingway House on Whitehead Street, the Southernmost Point buoy on South Street, and the Sunset Celebration at Mallory Square all lose their winter queues.
Ocean water reaches its annual temperature peak around the reef tract, making snorkeling at the barrier reef and swimming at Fort Zachary Taylor comfortable without a wetsuit.

Worth knowing

August sits at the statistical peak of Atlantic hurricane season, and the Overseas Highway as the sole evacuation corridor from Mile Marker 0 to the mainland means you need a contingency plan for any tropical storm advisory.
Humidity makes outdoor sightseeing between 11 a.m. and 3 p.m. physically draining. Even the 4-block walk from Bahama Village to Mallory Square along Greene Street leaves you soaked through your shirt.
Afternoon thunderstorms are a near-daily occurrence, building fast over the Gulf of Mexico, dropping heavy rain on Duval Street, and clearing outdoor patios at places like the Waterfront Brewery with little warning.
Several restaurants and shops along lower Duval and in Old Town operate on reduced summer schedules, and a handful close entirely from July through September. Check hours before walking 15 blocks in the heat.

Best for

Think twice if

Weather measured 30° / 28°C 149mm rain · 18 rainy days · 76% humidity rains perceptibly ~2.2h/day · 68% of mornings dry

Crowds low

Pack Lightweight, breathable cotton or linen clothing for the 76% humidity. A compact rain jacket or travel umbrella for the daily afternoon storms over Old Town. Reef-safe SPF 50+ sunscreen. Water shoes for coral-rubble beach entries at Fort Zachary Taylor.

August is one of Key West's two hottest months, tied with July for the highest average daily temperature. Highs reach 30.2°C (86°F) and lows sit at 27.7°C (82°F), so the air barely cools after dark on Duval Street. Humidity averages 76%, pushing the apparent temperature to roughly 34°C (93°F) in direct sun along the exposed waterfront at Mallory Square. Total rainfall reaches 149mm, spread across about 18 days. Almost all of it falls as afternoon thunderstorms that build quickly over the Gulf of Mexico and pass through Old Town in 20 to 40 minutes. The smell of hot asphalt and rain on the brick sidewalks of Whitehead Street is a signature August sensation. Mornings typically stay clear and bright until about 10 a.m., enough time to cycle the island or swim at Higgs Beach before the clouds stack up.

Seasonal caution

August marks the statistical peak of the Atlantic hurricane season. Named storms typically provide 24-48 hours of advance warning, but the Overseas Highway, spanning roughly 180 km (113 miles) as the sole evacuation route from Mile Marker 0 in Key West to the mainland at Florida City, means early awareness and a contingency plan are not optional.
The UV index averages 10-11 throughout August, classified as extreme on the WHO scale. Unprotected skin can burn in under 15 minutes at midday, and the reflection off the shallow water at Fort Zachary Taylor and Higgs Beach intensifies exposure.

Year-round climate

Averages from the last 5 years.

Monthly climate averages for Key West
Month	Avg high (°C)	Avg low (°C)	Rainfall (mm)
Jan	23	20	33
Feb	23	22	32
Mar	25	23	37
Apr	26	24	36
May	28	26	57
Jun	29	27	181
Jul	30	28	119
Aug	30	28	149
Sep	30	27	189
Oct	28	26	114
Nov	26	24	62
Dec	24	22	78

Best things to do in August

Morning snorkeling at the reef tract

water sports

The barrier reef runs parallel to the Keys, accessible by boat from Key West's Historic Seaport charter docks in roughly 45 minutes. Shallow reef patches between 3 and 9 meters depth host parrotfish, barracuda, nurse sharks, and staghorn coral formations.

Water temperature reaches its annual peak, making long sessions comfortable without a wetsuit. Summer visibility on calm mornings tends to run 15-20 meters at the popular sites near Sand Key.

Booking tipBook morning departures before 9 a.m. from the charter docks at the Historic Seaport. Afternoon trips frequently get cut short by the thunderstorm pattern.

Tarpon fishing on the backcountry flats

fishing

Sight-fishing for tarpon from a shallow-draft skiff in the backcountry channels around the Lower Keys is one of North America's premier angling experiences. The fish are powerful, acrobatic, and can exceed 45 kg (100 lbs).

Tarpon season extends through August, and the charter calendar is lighter than the peak months of June and July, making experienced guides easier to book on shorter notice.

Booking tipReserve a guide at least a week in advance through the charter operations at the Historic Seaport or on Stock Island. Experienced tarpon captains stay busy even during low season.

Sunset kayaking through the mangrove channels

water sports

Guided kayak tours wind through mangrove-lined channels on Key West's Gulf side, passing juvenile nurse sharks, spotted eagle rays, and wading birds before finishing with a sunset paddle across open water toward the Gulf of Mexico horizon.

August sunsets fall around 8 p.m., extending the paddle window. Evening waters tend to be calmer than during winter's frequent cold-front chop, and the warm air sitting on the flat water carries the salt-and-mangrove smell that defines the backcountry.

Booking tipOutfitters on Stock Island and near the Historic Seaport offer guided evening launches. Book 2-3 days ahead.

Early-morning swimming at Fort Zachary Taylor

beach

The state park at the island's western tip, inside the Truman Annex, has the clearest swimming water in Key West. Decent snorkeling off the rocky western point and natural shade from Australian pine trees make it unlike any other local beach.

Low August visitor counts mean open shade spots under the pines that fill by 9 a.m. in peak season. The calm summer ocean makes the rocky entry less challenging for families.

Booking tipArrive by bicycle to skip the vehicle entry process and parking scramble. The park opens at 8 a.m.

Air-conditioned museum circuit in Old Town

culture

The Harry S. Truman Little White House in Truman Annex, the Key West Shipwreck Museum on Whitehead Street, and the Key West Aquarium at Mallory Square all sit within a 10-block radius. Each takes 45 minutes to an hour, making a half-day indoor itinerary straightforward.

August's midday heat turns air-conditioned museums from a nice-to-have into the most comfortable way to spend the hours between 11 a.m. and 3 p.m. Empty rooms let you read every exhibit panel at the Mel Fisher Maritime Heritage Museum without someone's shoulder in your way.

Booking tipThe Truman Little White House runs hourly guided tours. No advance booking typically needed in August.

Lobster diving with a Florida fishing license

water sports

Recreational divers and snorkelers can harvest up to 6 spiny lobsters per person per day during the regular season, provided each has a carapace length of at least 76 mm measured in the water with a gauge.

The season opener falls on August 6, when lobster populations on accessible reef patches near Sand Key and the Western Sambos are at their densest before weeks of recreational pressure thin them.

Booking tipPurchase a Florida saltwater fishing license and the lobster stamp online through the Florida Fish and Wildlife Conservation Commission before your trip. Charter operators on Stock Island offer dive-and-harvest trips.

Ghost tour of Old Town after dark

tours

Walking tours through the historic streets of Old Town after dark, visiting the Key West Cemetery on Passover Lane, reportedly haunted Victorian homes on Eaton Street, and the former East Martello Tower. Most tours run about 90 minutes.

Evening temperatures settle into the upper 20s Celsius (low 80s Fahrenheit), still warm but bearable at a walking pace along the quiet residential blocks. Smaller summer groups make the experience more atmospheric than the packed winter tours.

Booking tipTours depart from various points along Duval Street. Walk-up spots are typically available in August.

What to eat in August

In season: fruit

South Florida mango
Local mango season runs June through August, making this the last month for tree-ripened fruit from Homestead and the Upper Keys. Kent, Tommy Atkins, and Nam Doc Mai varieties appear at roadside stands along the Overseas Highway and at the Key West farmers markets.
Florida Key lime
The small, aromatic Key lime reaches peak ripeness in summer. August fruit is at its most fragrant and tart, and you can taste the difference between a pie made with fresh local limes and one made with bottled juice at places like Kermit's Key West Key Lime Shoppe on Elizabeth Street.

On menus now

Florida spiny lobster
Right after the August 6 season opener, restaurants across Old Town and the Historic Seaport feature the freshest supply of the year. Served grilled whole, steamed with drawn butter, or in lobster rolls at spots from the harbor raw bars to Bahama Village.
Yellowtail snapper
One of the most prized reef fish in the Florida Keys, yellowtail is at peak abundance in summer. Restaurants across Old Town serve it grilled, blackened, or as ceviche with local Key lime citrus.

What to drink

Rum runner
The frozen rum cocktail with banana liqueur and blackberry brandy has roots in the Upper Keys from the 1970s. August heat makes the frozen version feel less like a tourist ritual and more like a survival strategy. Nearly every bar on Duval Street between Greene and Southard makes its own version.

Regular events in August

Florida Regular Spiny Lobster Season OpeningFree

The statewide recreational and commercial spiny lobster season opens, following the two-day sport season (mini-season) in late July. Restaurants from the Historic Seaport to Bahama Village feature fresh lobster specials for weeks afterward.

August 6 (season runs through March 31)

Perseid Meteor ShowerFree

The most reliable annual meteor shower peaks in mid-August, producing up to 100 meteors per hour under clear conditions. Key West's flat southern horizon over the Atlantic makes for reasonable viewing despite light pollution from Duval Street. The waterfront east of White Street Pier tends to be the darkest accessible spot.

Peak viewing August 11-13

Sunset Celebration at Mallory SquareFree

The nightly gathering of street performers, artisans, and food carts on the Mallory Square waterfront has run since the 1960s. In August, the smaller crowd means performers interact directly with spectators, and you can claim a railing spot with an unobstructed view of the Gulf of Mexico sunset.

Nightly, beginning approximately 2 hours before sunset (around 6:00 p.m. in August)

Best places this August

Fort Zachary Taylor Historic State Park
state park
Built in 1845 as a naval fortification, the park occupies the western tip of the island inside the Truman Annex. Its beach has the strongest snorkeling of any Key West shoreline, with reef fish visible from the rocky western point in as little as 1 meter of water. The Australian pine shade makes it the only bearable beach for a full August afternoon.
Truman Annex
Higgs Beach and the African Cemetery
beach and memorial
A public beach on the south shore with a consistent offshore breeze from the Atlantic that helps in August's humidity. The African Cemetery at Higgs Beach memorializes 295 Africans who died here in 1860 after being rescued from three slave ships by the U.S. Navy. The adjacent West Martello Tower houses the Key West Garden Club.
Casa Marina
Key West Aquarium
museum
Opened in 1934, one of the first open-air aquariums in the United States. Small enough to see everything in an hour, with touch tanks and nurse shark feedings. The open-air design at the Mallory Square end of Whitehead Street catches the ocean breeze even in summer.
Old Town
Mallory Square
landmark
The waterfront plaza where the nightly Sunset Celebration has drawn performers and crowds since the 1960s. In August, the performer-to-spectator ratio shifts in your favor. You can pick your spot at the railing, and the sunset over the Gulf of Mexico tends to produce vivid oranges and pinks in the humid summer air.
Old Town
White Street Pier
landmark
A concrete fishing pier extending into the Atlantic from the end of White Street. Locals gather here at sunset for a quieter alternative to the Mallory Square scene. Decent shore fishing for snappers and grunts off the pilings, with the dark water east of the pier offering the best Perseid meteor shower viewing on the island in mid-August.
Casa Marina
Basilica of St. Mary Star of the Sea
historic church
One of the oldest Catholic churches in South Florida, built in 1904 on Truman Avenue. The cool stone interior feels like a different climate from the 34°C heat index on the street outside. The stained glass and vaulted ceiling reward a 20-minute visit, especially as a midday refuge.
Old Town
Southernmost Point buoy
landmark
The painted concrete buoy at the corner of South Street and Whitehead Street, installed in 1983 to mark the southernmost point of the continental United States. The photo line in August is typically under 5 minutes, compared to 30 or more in February. Early morning light from the Atlantic behind you produces the best photographs.
Old Town
Harry S. Truman Little White House
historic house museum
The restored residence in the Truman Annex where President Truman spent 175 days during 11 working vacations in the late 1940s and early 1950s. Guided tours run hourly and cover both the presidential history and the building's earlier role as a naval command center. The air-conditioned interior is a welcome escape from August heat.
Truman Annex

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Reef-safe sunscreen, SPF 50+UV intensity in August reaches extreme levels on the international scale. Reef-safe formulas protect the barrier reef near Sand Key, and some Key West retailers on Duval Street stock only reef-safe options. Shop
Compact rain jacket or travel umbrellaAfternoon thunderstorms over the Gulf of Mexico can go from clear sky to heavy rain in 15 minutes. A jacket that stuffs into a daypack beats getting caught at the far end of Duval Street near the Southernmost Point. Shop
Water shoes or reef shoesSeveral beach entries and snorkeling access points have sharp coral rubble or rocky limestone bottoms. Fort Zachary Taylor's shoreline is the main offender, with limestone chunks that will cut bare feet on the walk into the water. Shop
Lightweight cotton or linen clothingSynthetic athletic fabrics trap the 76% humidity against the skin. Natural fibers breathe better in subtropical conditions and dry surprisingly fast in the ocean breeze along the waterfront. Shop
Insect repellent with DEET or picaridinNo-see-ums and mosquitoes are more active during summer months, especially near the mangrove edges and salt ponds east of White Street toward Smathers Beach at dawn and dusk. Shop
Reusable water bottleDehydration builds fast when humidity masks how much you are sweating. Key West's tap water comes from the Florida Keys Aqueduct Authority pipeline running 200 km from the mainland and is safe to drink. Shop
Waterproof phone case or dry bagBetween sudden rain on Duval Street, boat trips to the reef, and kayaking through the mangrove channels, electronics face more water exposure in August than in any dry-season month. Shop
Light long-sleeve UPF shirtCovers more skin than sunscreen alone and feels cooler than reapplying greasy sunscreen every 90 minutes walking Old Town's exposed streets. A UPF 50 layer is worth the suitcase space. Shop

Insider tips

The beach at Fort Zachary Taylor is the only one in Key West with substantial natural shade from Australian pine trees. In August, that shade is the difference between a 30-minute visit and a full afternoon. Arrive before 9 a.m. to secure a spot near the tree line.
Restaurants across the island run lobster specials the first two weeks after the August 6 season opener, when competition to feature the catch is highest. That narrow window tends to produce the best variety and preparation quality of the whole season.
Skip the open-air Conch Tour Train and Old Town Trolley in August heat. Rent a bicycle from one of the shops on Truman Avenue early in the morning and cover Old Town before 10 a.m., when the streets are quiet and the temperature is still manageable.
The restaurants and food counters in Bahama Village, particularly along Petronia Street and Thomas Street, serve some of the best meals on the island with significantly less tourist markup than the lower Duval Street strip near Mallory Square. Worth the 5-block walk.
Smathers Beach along South Roosevelt Boulevard looks better in photos, but the no-see-ums are worse there in summer. Higgs Beach, with its stronger offshore breeze from the Atlantic, tends to have fewer biting insects in August.

Avoid these mistakes

Booking an all-day offshore excursion that departs after noon. Snorkeling trips to Sand Key, kayak tours on the Gulf side, and fishing charters from the Historic Seaport that leave in the afternoon get cut short by thunderstorms more often than not in August. Morning departures before 9 a.m. are far more reliable.
Driving down from Miami on a Friday afternoon. The Overseas Highway is a two-lane road for long stretches, including the 18-Mile Stretch through the Upper Keys, and summer Friday traffic can add 2-3 hours to the roughly 4-hour drive. Leaving Miami before 8 a.m. or after 7 p.m. avoids the worst congestion.
Assuming every restaurant and bar on Duval Street keeps its winter schedule. Several establishments in Old Town and along the harbor reduce to 4 or 5 days a week during summer, and a handful close entirely from July through September. Check hours online before walking 15 blocks in the heat.
Packing only for beach weather and forgetting rain gear. The afternoon storms that build over the Gulf of Mexico in August are not gentle drizzles. They arrive fast, drop heavy rain on the exposed streets between Mallory Square and the Southernmost Point, and pass within an hour. Getting caught without cover at the far end of Duval Street in a downpour is a common, avoidable August experience.

Practical tips for August

Book water activities from the charter docks at the Historic Seaport for morning departures, ideally before 10 a.m., to stay ahead of the afternoon storm cycle. Rental bicycles and scooters from shops along Truman Avenue are the most practical way to move around Old Town, which fits within a roughly 15-block radius between Mallory Square and White Street. Key West Transit runs reduced summer bus schedules on some routes. Carry water everywhere and duck into air-conditioned spaces along Duval or Fleming Street during the midday peak. Mosquito repellent matters more in August than in the dry season, particularly near the salt ponds and mangrove edges east of White Street toward Smathers Beach. If a tropical system enters NOAA's 5-day forecast cone, know your lodging's cancellation policy and your Overseas Highway exit options before conditions deteriorate. Grocery stores and pharmacies are concentrated in New Town along North Roosevelt Boulevard, a 10-minute bike ride from the historic district.

FAQ

Is August a good time to visit Key West?

August is a fair time to visit if you accept the trade-offs. You get the lowest hotel rates on the island and can walk into restaurants on Duval Street that need reservations 2 months out in February. Florida's spiny lobster season opens August 6, so the seafood across Old Town is at its freshest. That said, you sit at the peak of hurricane season, humidity hovers around 76%, and afternoon thunderstorms roll off the Gulf of Mexico nearly every day. Fort Zachary Taylor's shaded beach and the air-conditioned galleries at the Mel Fisher Maritime Heritage Museum become survival tactics, not options. If you can build flexibility into your dates, there is genuine value here. For reliably comfortable weather with minimal risk, the February-through-April dry season is a stronger window.

What is the weather like in Key West in August?

Hot, humid, and punctuated by afternoon rain. Highs reach about 30°C (86°F) and lows sit near 28°C (82°F), so nighttime on Duval Street brings little relief from the daytime heat. The humidity tends to push the felt temperature to roughly 34°C (93°F) in direct sun, and you will notice it the moment you step off the plane at Key West International Airport. Walking the 4 blocks from Bahama Village to Mallory Square around noon feels like wading through warm cotton. Brief, heavy thunderstorms typically build over the Gulf of Mexico most afternoons and pass through in 20 to 40 minutes. Mornings are the most reliable window for outdoor activities. You might get 4 or 5 clear hours before the clouds stack up, enough time to cycle the Old Town loop or swim at Higgs Beach before ducking indoors.

Is Key West crowded in August?

No. August is one of the least crowded months on the island. The Sunset Celebration at Mallory Square, which packs the waterfront shoulder-to-shoulder in March, thins enough that you can stand at the railing and watch the performers without anyone blocking your view. The Hemingway House on Whitehead Street, where winter tour groups crowd around the famous six-toed cats, typically has room for you to wander the gardens at your own pace. Restaurants along the harbor that fill every seat in peak season are walk-in. Fewer people come because of the heat, humidity, and hurricane risk.

Is August hurricane season in Key West?

Yes. The Atlantic hurricane season runs from June 1 through November 30, and August marks the beginning of the most statistically active stretch. Key West is especially exposed. The island sits at Mile Marker 0 on US-1, and the Overseas Highway, spanning roughly 180 km of bridges and causeways, is the sole road connecting the island chain to the Florida mainland. Evacuation orders come 48 hours ahead of a storm, and traffic on the Seven Mile Bridge and the 18-Mile Stretch can crawl during a mass departure. Monitor NOAA's National Hurricane Center forecasts daily and carry travel insurance with weather-disruption coverage for any summer trip.

Can you swim in Key West in August?

The ocean is at its warmest in August, comfortable for extended swimming without any thermal layer. Fort Zachary Taylor, at the island's western tip, has the clearest water and decent snorkeling directly off the rocky point, where you can spot parrotfish in about 1 meter of depth. Higgs Beach on the south shore tends to have a steadier offshore breeze, which helps with the humidity between swims. Smathers Beach along South Roosevelt Boulevard has the longest sand stretch but worse no-see-ums in summer. Afternoon storms can create brief rough patches, but conditions typically settle by early evening. Morning is the sweet spot, both for calmer water and lower UV exposure.