May in St. Augustine is the last comfortable window before real summer heat settles over northeast Florida. Daytime temperatures reach about 28°C (82°F) with lows near 21°C (70°F), warm enough for full beach days at Anastasia State Park without the oppressive humidity that arrives by late June. The Atlantic warms to roughly 24°C (75°F) by mid-May, making it the first month of genuinely comfortable ocean swimming off Vilano Beach and St. Augustine Beach. Spring break crowds from March and April have cleared out of the Historic District, and summer vacation families haven't shown up yet. That gap means shorter lines at Castillo de San Marcos, open tables along St. George Street, and hotel rates that sit well below July peaks.
The trade-off is afternoon thunderstorms. They tend to build around 3 or 4 PM, drop heavy rain for 15 to 30 minutes, and push east over the ocean. Locals barely register them. If you schedule Fort Matanzas or Washington Oaks Gardens State Park for mornings, you'll likely miss the rain entirely. The storms do keep everything green. Live oaks along Aviles Street are fully leafed out by May, and the subtropical plantings around Flagler College look their best. You can smell the jasmine and confederate jasmine blooming in the courtyard gardens as you walk through Uptown in the evening.
Memorial Day weekend at the end of the month marks the unofficial start of summer tourism. Prices tick up that final week, especially around St. Augustine Beach and the bayfront. If you can visit the first three weeks of May instead, you get the same warm weather without the holiday premium. Worth noting, too, that May falls before the peak of Atlantic hurricane season. Tropical weather concerns are still minimal.
Why visit in May
- Ocean temperature reaches 24°C (75°F) by mid-May, the first month of comfortable Atlantic swimming at Vilano Beach and Anastasia State Park
- Shoulder-season gap between spring break (March-April) and summer vacation (June-August) means shorter lines at Castillo de San Marcos and the Lightner Museum
- Hotel rates in the Historic District and along St. Augustine Beach sit 20-30% below July and August peaks
- Morning temperatures around 22-24°C (72-75°F) are ideal for walking the 144-block Historic District without overheating
- The Romanza Festivale of Music & the Arts fills venues across the city with concerts, dance, and art exhibitions for roughly 10 days in mid-May
Worth knowing
- Afternoon thunderstorms hit roughly 10 days during the month, typically between 3 and 5 PM, with lightning that clears beaches for 30-60 minutes
- Humidity at 76% is noticeably higher than March (around 68%) or October (around 70%), and the combination of heat and moisture can make midday touring at unshaded sites like Fort Mose feel draining
- UV index regularly reaches 9 or 10 in late May, and the reflective coquina surfaces at the forts and along the seawall intensify sun exposure
- Memorial Day weekend (last Monday of May) brings a sharp spike in visitors and prices, particularly along the beaches and St. George Street
Best for
Think twice if
May marks the shift from spring warmth to early summer in St. Augustine. Mornings start mild around 21°C (70°F) with a light breeze off the Matanzas River. By midday, temperatures climb to 28°C (82°F) under a subtropical sun that feels stronger than the number suggests, especially near the water. Humidity holds steady at 76%, which you'll notice as a persistent dampness on your skin by early afternoon. Rainfall totals about 80mm spread across 10 days, almost entirely from afternoon thunderstorms that build quickly, flash with lightning, and clear within 30 minutes. Mornings are typically dry and bright. The evenings cool to a comfortable 21°C (70°F) along the bayfront, with enough breeze to make outdoor dining along Avenida Menendez pleasant.
Seasonal caution
- UV index reaches 9-10 in late May, intensified by reflection off coquina stone walls and water surfaces. Sunburn can happen within 20 minutes of unprotected exposure at midday near the forts or on the beach.
- Afternoon thunderstorms produce frequent cloud-to-ground lightning. Florida leads the United States in lightning fatalities. Clear the beach and move to an enclosed structure when you hear thunder. The storms pass quickly, typically within 30 minutes, but the lightning risk is real.
Year-round climate
Averages from the last 5 years.
| Month | Avg high (°C) | Avg low (°C) | Rainfall (mm) |
|---|---|---|---|
| Jan | 18 | 10 | 52 |
| Feb | 20 | 13 | 61 |
| Mar | 22 | 15 | 84 |
| Apr | 25 | 18 | 82 |
| May | 28 | 21 | 80 |
| Jun | 30 | 24 | 127 |
| Jul | 31 | 25 | 154 |
| Aug | 30 | 25 | 163 |
| Sep | 28 | 24 | 201 |
| Oct | 25 | 20 | 91 |
| Nov | 22 | 16 | 98 |
| Dec | 20 | 13 | 44 |
Holidays and festivals in May
Public holidays
- Truman Day(Truman Day)8 May 2027
- Memorial Day(Memorial Day)31 May 2027
Best things to do in May
Morning tour of Castillo de San Marcos
historyThe oldest masonry fort in the continental United States, built by the Spanish between 1672 and 1695 from local coquina limestone. The walls are 4 meters thick at the base. Rangers fire cannon demonstrations on most weekends. The interior rooms still hold the damp, mineral smell of centuries-old coquina, and the gun deck offers clear views across Matanzas Bay to Anastasia Island.
May mornings around 22-24°C (72-75°F) make the shadeless gun deck and courtyard comfortable before the midday sun turns the pale coquina walls into reflective ovens. Summer visitors at 31°C have a much harder time.Booking tipArrive when the gates open in the morning. By 11 AM the school groups and tour buses start arriving, and the narrow casemate rooms get crowded.
Kayaking the Matanzas River estuary
outdoorPaddle through the salt marsh creeks south of the Bridge of Lions, where the tidal flats around Salt Run attract herons, egrets, roseate spoonbills, and the occasional dolphin pod. The shallow water is warm enough in May to not mind a capsize. Outfitters on Anastasia Island run guided 2-hour morning trips that follow the tidal current.
Water temperature reaches 24°C (75°F), warm enough for comfortable paddling. The spring nesting season means bird activity along the Intracoastal Waterway is at its peak. Summer afternoon storms make morning paddles more reliable in May than in July.Booking tipBook morning departures before 10 AM. Afternoon wind off the Atlantic picks up to 15-20 km/h and makes the return paddle against the current considerably harder.
Walking the Historic District at golden hour
sightseeingThe 144-block National Register district holds over 60 buildings from the Spanish Colonial and Flagler-era periods. Start at the City Gate on St. George Street and walk south past the Cathedral Basilica (built 1797), the Lightner Museum (formerly the Alcazar Hotel, 1888), and Flagler College (the old Ponce de León Hotel, 1888). The evening light turns the Flagler-era Spanish Renaissance facades a warm amber.
Sunset falls around 8:15 PM in late May, giving a long golden hour window after the afternoon storms clear. The lush canopy of live oaks and magnolias is fully leafed, and the jasmine is blooming along the residential blocks south of King Street.Booking tipNo booking needed. The district is open and walkable. Start around 6:30 PM and you'll catch the best light on the east-facing facades along Aviles Street.
Beach day at Anastasia State Park
beachA 6.5 km stretch of undeveloped Atlantic beach backed by maritime hammock forest, with boardwalk access and a tidal lagoon for calmer wading. The sand is packed coquina shell, pale and firm underfoot. On weekdays in May, you might have 50 meters of shoreline to yourself. Loggerhead sea turtles begin nesting along this stretch in May, and the park marks active nests with stakes and tape.
Ocean temperature hits 24°C (75°F), the threshold for comfortable swimming. The shoulder-season crowd levels mean available parking on weekday mornings, which fills by 10 AM during summer weekends. May is also the start of loggerhead nesting season, which runs through October.Booking tipThe park charges a per-vehicle entrance fee. Arrive before 9 AM on weekends to guarantee a parking spot. Weekdays in May rarely fill up.
Touring the Lightner Museum
cultureOtto Lightner's collection of Gilded Age decorative arts fills the former Alcazar Hotel, a Carrère and Hastings building from 1888. The indoor pool in the basement, now drained, still has its original tile work and serves as an event space. Three floors of Tiffany glass, Victorian-era mechanical musical instruments, and period furniture. The building itself, with its poured-concrete Spanish Renaissance arches, is half the experience.
An air-conditioned retreat for those 28°C afternoons when the thunderstorms roll in. May's lower visitor numbers mean you can linger in front of the Tiffany pieces without a crowd pressing from behind. The museum sits directly across from Flagler College, so both can be seen in a single afternoon.Booking tipCheck the museum's website for current admission rates. Allow 90 minutes to 2 hours for a thorough visit.
Fort Matanzas National Monument
historyA small Spanish watchtower fort built in 1742 on Rattlesnake Island, accessible only by a free National Park Service ferry from the visitor center on A1A, about 22 km south of downtown St. Augustine. The ferry crosses the Matanzas River in about 5 minutes. The fort itself is compact, a single gun deck with a few garrison rooms, but the setting on the river mouth with the Atlantic visible to the east is striking.
The free ferry runs a regular schedule, and May's moderate crowds mean shorter waits than summer. Morning trips before 11 AM avoid the afternoon storms. The surrounding salt marsh is alive with wading birds during spring nesting season.Booking tipThe ferry is first-come, first-served with a capacity of about 40 passengers per trip. Arrive at the visitor center by 9:30 AM on weekends. Weekdays in May rarely have a wait.
Dinner along Avenida Menendez on the bayfront
foodThe waterfront stretch between the Bridge of Lions and the Castillo holds a row of restaurants with outdoor seating facing Matanzas Bay. On May evenings, the temperature drops to around 21°C (70°F) with a salt breeze off the water. Pelicans and cormorants dive in the bay while you eat. The Minorcan clam chowder is on nearly every menu, along with local shrimp and datil-pepper-spiced dishes.
Evenings are warm enough for outdoor dining but not yet oppressively humid like July and August. The 8:15 PM sunset in late May gives a long, lit evening over the water. Memorial Day weekend aside, tables are available without long waits.Booking tipReservations are recommended for weekend dinners, especially the Friday and Saturday of Memorial Day weekend. Weeknight tables are generally available on a walk-in basis.
What to eat in May
In season: fruit
Florida blueberries
Northeast Florida's blueberry harvest peaks in April and May. Farms in the Elkton area, about 20 minutes west of downtown St. Augustine, open for u-pick during this window. Local restaurants and bakeries along St. George Street work fresh blueberries into pies, cobblers, and cocktails during the short season. The berries tend to be smaller and sweeter than the commercial varieties shipped from further south.
On menus now
Minorcan clam chowder
St. Augustine's signature dish, a tomato-based chowder spiked with local datil peppers. It traces back to the Minorcan settlers who arrived in the 1760s from the Mediterranean. Nearly every seafood restaurant in the Historic District and along San Marco Avenue serves a version, and the warmth of the datil pepper seems to pair well with May's humid evenings. The texture is thinner than New England chowder, more brothy, with a slow heat that builds.
In markets
Royal red shrimp
Deepwater shrimp harvested off the northeast Florida continental shelf, with a lobster-like sweetness and a pink-red hue unlike typical white shrimp. The spring catch tends to be strong through May, and you'll find them at seafood counters on Anastasia Island and in restaurants throughout the Historic District. The texture is softer and more delicate than standard Gulf shrimp.
Datil pepper hot sauce
The datil pepper grows almost exclusively in the St. Augustine area, and May is when the first plants of the season start producing. Local makers sell small-batch sauces at the St. Augustine Amphitheatre farmers market on Saturday mornings. The heat level sits somewhere between a habanero and a jalapeño, with a sweeter, fruitier flavor than either. You'll see bottles on nearly every restaurant table in town.
Regular events in May
Romanza Festivale of Music & the ArtsFree
A multi-day celebration of music, dance, theater, and visual arts held at venues across St. Augustine, including the Cathedral Basilica, Flagler College, and the Lightner Museum. Performances range from classical chamber music to flamenco and jazz. The festival typically spans about 10 days in mid-May.
Mid-May, approximately 10 daysSt. Augustine Amphitheatre Saturday farmers marketFree
Weekly open-air market at the Amphitheatre on A1A, with local produce, datil pepper products, baked goods, honey from St. Johns County apiaries, and prepared foods. The May heat makes early arrival worthwhile. Runs year-round on Saturday mornings.
Every Saturday morningMemorial Day ceremony at the St. Augustine National CemeteryFree
The St. Augustine National Cemetery on Marine Street, established in 1842, hosts an annual Memorial Day observance with flag placement on the approximately 3,000 graves. It is one of the oldest national cemeteries in the country. The ceremony typically takes place on the morning of Memorial Day.
Last Monday of MayBest places this May
Castillo de San Marcos
historyThe oldest masonry fort in the continental US, built 1672-1695 from local coquina stone. The 4-meter-thick walls absorbed cannonball impacts rather than shattering. Managed by the National Park Service, with ranger-led programs and weekend cannon firings.
BayfrontFlagler College
architectureHenry Flagler's 1888 Ponce de León Hotel, now a liberal arts college. The lobby's Tiffany stained-glass windows and hand-painted murals by George Maynard are open to visitors through guided tours. The Spanish Renaissance exterior is one of the most photographed facades in northeast Florida.
Historic DistrictAnastasia State Park
natureA 6.5 km undeveloped Atlantic beach with boardwalk access, a tidal lagoon, and maritime hammock trails. Loggerhead turtle nesting begins in May. The Ancient Trail loop winds through a forest of live oak and red cedar draped in Spanish moss.
Anastasia IslandFort Matanzas National Monument
historyA 1742 Spanish coquina watchtower on Rattlesnake Island, reached by a free NPS ferry. The surrounding salt marsh and river-mouth setting make the 5-minute crossing as memorable as the fort itself.
South A1ALightner Museum
cultureThree floors of Gilded Age decorative arts inside the 1888 Alcazar Hotel building. The drained indoor swimming pool in the basement retains its original tile work. Strong Tiffany glass collection and Victorian mechanical musical instruments.
Historic DistrictSt. George Street
sightseeingThe pedestrian spine of the Historic District, running about 800 meters from the City Gate south to the Plaza de la Constitución. Lined with shops, restaurants, and restored colonial-era buildings. The street dates to the original 1572 Spanish town plan.
Historic DistrictWashington Oaks Gardens State Park
natureFormal gardens on the Matanzas River side and a coquina rock beach on the Atlantic side, about 40 km south of downtown. The rose garden and the live oak canopy over the gardens are at their peak in May. Low crowds on weekday mornings.
Palm Coast areaFort Mose Historic State Park
historySite of the first legally sanctioned free African settlement in what is now the United States, established in 1738. A boardwalk leads through salt marsh to interpretive panels overlooking the original site on Robinson Creek, north of downtown.
North St. Augustine
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Insider tips
The Castillo de San Marcos gun deck faces due east. Arrive at opening time on a clear morning and you'll have the bay views and the coquina walls in warm, low-angle light with almost nobody else up there. By 10:30 AM the tour groups arrive and it stays crowded until closing.
If an afternoon thunderstorm catches you in the Historic District, duck into the Lightner Museum or the lobby of Flagler College. Both are air-conditioned, and the Flagler lobby tour takes about 30 minutes, which is roughly how long the storm lasts.
The stretch of A1A between Anastasia State Park and Crescent Beach has several unmarked beach access points with small parking turnouts. On weekdays in May, these spots are nearly empty while the main Anastasia lot fills up.
The St. Augustine Amphitheatre farmers market on Saturday mornings is where locals buy datil pepper sauce, local honey, and seasonal produce. It runs from 8:30 AM to 12:30 PM. Get there before 10 AM to avoid the late-morning heat and pick over.
For Minorcan clam chowder, skip the St. George Street tourist spots and try the restaurants along San Marco Avenue or in the Lincolnville neighborhood. The portions tend to be larger and the datil heat more authentic.
Avoid these mistakes
- Scheduling outdoor activities for the afternoon. The thunderstorms that roll in between 3 and 5 PM are predictable enough that locals plan around them. Stack your outdoor time before noon and save indoor attractions or restaurants for the 2-5 PM window.
- Underestimating the UV exposure at the forts. The pale coquina walls reflect sunlight from every direction, and the gun decks and courtyards have no shade. Visitors regularly leave Castillo de San Marcos sunburned after what they thought was a quick 45-minute visit.
- Driving into the Historic District on weekends. Parking within the 144-block district is limited and the one-way streets are confusing. Park at the visitor center lot north of the City Gate and walk in, or use the parking garage on Cordova Street.
- Booking a hotel for Memorial Day weekend at shoulder-season rates. That last weekend of May prices like summer. If your dates are flexible, shifting even 4-5 days earlier can save 30-40% on the same room.
- Skipping Fort Matanzas because it seems far from downtown. The drive south on A1A takes about 25 minutes, and the free ferry ride across the Matanzas River is part of the experience. The smaller crowds and river-mouth setting make it arguably more atmospheric than Castillo de San Marcos.
Practical tips for May
Book accommodations for the first 3 weeks of May to avoid the Memorial Day price spike. Mornings are your best window for outdoor activities. Plan to be indoors or at a restaurant between 3 and 5 PM when the afternoon storms are most likely. Bring or buy sunscreen with SPF 50 or higher, and reapply frequently. The Historic District is best explored on foot, so wear comfortable walking shoes on the uneven coquina-and-brick sidewalks. Check the National Park Service website for current hours and any scheduled closures at Castillo de San Marcos and Fort Matanzas before your visit. The Romanza Festivale events are mostly free but some performances require advance registration through the festival's website. If you're renting a car, fill the tank before heading south on A1A toward Fort Matanzas and Washington Oaks, as gas stations thin out past Crescent Beach.
FAQ
Is May a good time to swim in the ocean at St. Augustine Beach?
May is the first month when the Atlantic feels genuinely comfortable for swimming. Water temperature reaches about 24°C (75°F) by mid-May, up from around 21°C (70°F) in April. That said, you might find the water still a bit bracing in the first week. By the second half of the month, most people are swimming without hesitation. The beaches at Anastasia State Park and Vilano Beach tend to have calmer surf than St. Augustine Beach proper.
How bad are the afternoon thunderstorms in May?
They're short and predictable. Most days, storms build between 3 and 5 PM, drop heavy rain for 15 to 30 minutes, and clear out. Lightning is the real concern, not the rain itself. Florida leads the US in lightning fatalities, so take the warnings seriously and move indoors when you hear thunder. The mornings are almost always clear and dry. Locals treat the storms as a brief intermission, not a disruption.
Is Memorial Day weekend worth visiting, or should I avoid it?
It depends on your tolerance for crowds. Memorial Day weekend is the unofficial start of summer tourism in St. Augustine. Hotel rates jump to near-summer levels, St. George Street gets noticeably more crowded, and beach parking at Anastasia State Park can fill by mid-morning. If you prefer a quieter experience, the first 2-3 weeks of May offer the same weather at lower prices with fewer people. If you don't mind the crowd uptick, the long weekend still feels manageable compared to peak summer.
Do I need a car to get around St. Augustine in May?
For the Historic District and the bayfront, no. The 144-block district is walkable, and most of the restaurants, shops, and major sites like Castillo de San Marcos and Flagler College are within a 15-minute walk of each other. You will want a car for Fort Matanzas (22 km south), Washington Oaks Gardens State Park (40 km south), and the Elkton blueberry farms (about 20 minutes west). Anastasia State Park is technically bikeable from downtown across the Bridge of Lions, about 3 km each way.
What should I wear for touring the forts in May?
Light, breathable clothing in cotton or linen. The forts have almost no shade, and the coquina stone walls reflect heat and UV from every angle. A wide-brimmed hat is more useful than sunglasses alone. Closed-toe shoes with good grip help on the uneven stone surfaces inside Castillo de San Marcos. Bring a water bottle. At 28°C with 76% humidity, you'll dehydrate faster than you expect on a shadeless gun deck.
Things to Do in St. Augustine in May
Free cancellation Sunset Cruise of St. Augustine
Cruise — 1.5 hours, free cancellation.
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Free cancellation Wine Tasting Cruise in St. Augustine
Cruise — 1.5 hours, free cancellation.
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Free cancellation St. Augustine Live Music Sail with Drinks & Sunset Option
Cruise — 1.8 hours, free cancellation.
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Free cancellation Red Boat Tours - Dolphin Odyssey and Sightseeing Tour
Cruise — 2 hours, free cancellation.
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Free cancellation Red Boat Tours - Adults-Only & Family Friendly BYOB Sunset Cruise
Cruise — 1.5 hours, free cancellation.
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Free cancellation Adventure Boat Tours - Sunset Water Tour in St. Augustine
Cruise — free cancellation.
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