May in Honolulu is defined by one phrase locals repeat every year. May Day is Lei Day. On May 1, Kapiolani Park fills with lei-making competitions, hula performances, and the crowning of a Lei Day Queen, a tradition that dates back to 1928. The rest of the month settles into a comfortable rhythm as O'ahu transitions from the wetter winter season into the long, dry summer. Daytime temperatures hover around 27°C (81°F) with lows near 22°C (71°F), and the humidity sits at roughly 71%, which feels warm but manageable with the trade winds blowing. You'll still catch occasional showers, about 60mm across 12 rainy days, but these tend to be brief afternoon bursts over the Ko'olau Range that rarely interrupt a beach day in Waikiki.
The timing puts May in a sweet spot between Honolulu's peak winter season and the summer family-travel wave. Hotel rates have dropped from their December-through-March highs, but the island hasn't yet filled with mainland school-vacation crowds. That changes during Memorial Day weekend, when Ala Moana Beach Park hosts Lantern Floating Hawaii, a ceremony that draws upwards of 50,000 people to the shoreline at sunset. Outside that single weekend, you'll find shorter lines at Diamond Head, open tables at restaurants in Kailua, and elbow room on the sand at Kaimana Beach. To be fair, Honolulu is never truly empty. But May comes close to a lull by O'ahu standards.
Why visit in May
- Hotel rates in Waikiki drop noticeably from the December-March peak, putting mid-range rooms well below high-season pricing without the summer family-travel markup
- Trade winds return more consistently in May, keeping temperatures comfortable for hiking Diamond Head and the Manoa Falls trail without the oppressive stillness of a calm summer day
- South shore swells begin arriving, turning breaks like Ala Moana Bowls and Canoes into reliable surf spots after months of flat south-facing water
- Lei Day on May 1 at Kapiolani Park and Lantern Floating Hawaii on Memorial Day weekend give you two culturally significant events in a single month
Worth knowing
- Whale watching season ended in April. Humpbacks have migrated north, so any whale-tour booking in May is likely a waste of money
- Rainfall at 60mm is still higher than the near-dry months of June through October, and afternoon showers can roll in fast over Manoa and Nu'uanu valleys
- Memorial Day weekend brings a noticeable spike in both prices and crowds, particularly at Ala Moana and Waikiki Beach, temporarily erasing the shoulder-season advantage
- North Shore surf has gone flat for the season. If big-wave watching at Pipeline or Sunset Beach was your reason to visit, wait until November
Best for
Think twice if
May sits at the tail end of Honolulu's wet season, though 'wet' is relative here. The 60mm of rainfall typically falls in short afternoon bursts rather than all-day downpours. Mornings tend to start clear and warm, with temperatures climbing from around 22°C (71°F) at dawn to 27°C (81°F) by early afternoon. Trade winds blow from the northeast on most days, which keeps the humidity at 71% from feeling as heavy as that number suggests. The windward side around Kailua and Kane'ohe catches more rain than the leeward Waikiki and Ala Moana coast. By late May, rainfall tapers noticeably, previewing the dry summer months ahead.
Year-round climate
Averages from the last 5 years.
| Month | Avg high (°C) | Avg low (°C) | Rainfall (mm) |
|---|---|---|---|
| Jan | 26 | 20 | 71 |
| Feb | 25 | 20 | 44 |
| Mar | 26 | 20 | 58 |
| Apr | 26 | 21 | 59 |
| May | 27 | 22 | 60 |
| Jun | 28 | 23 | 17 |
| Jul | 29 | 23 | 18 |
| Aug | 29 | 23 | 25 |
| Sep | 29 | 23 | 19 |
| Oct | 29 | 23 | 28 |
| Nov | 27 | 22 | 31 |
| Dec | 26 | 21 | 72 |
Headline events
Lei Day Celebration
May 1
Hawai'i's oldest flower-lei festival, held since 1928 at Kapiolani Park in Waikiki. Lei-making competitions across multiple styles, live hula performances, Hawaiian music, and the crowning of the Lei Day Queen draw thousands of locals and visitors. The scent of plumeria and pikake hangs thick over the park all day.
Lantern Floating Hawaii
Memorial Day (last Monday of May), ceremony begins at sunset
On Memorial Day evening, an estimated 50,000 people gather at Ala Moana Beach Park to launch paper lanterns into the water at sunset. Organized by the Shinnyo-en temple, the ceremony honors loved ones who have passed. The sight of thousands of glowing lanterns drifting across the darkening water is one of the most visually striking events on O'ahu's calendar.
Best things to do in May
Hike Diamond Head at sunrise
hikingThe 1.3 km trail to the 232-meter summit of Le'ahi (Diamond Head) passes through a World War II-era tunnel and concrete fire-control station before opening to a 360-degree view of Waikiki, Koko Head, and the Pacific. The climb takes most people 30-45 minutes each way.
May's 22°C mornings and returning trade winds make the exposed switchbacks far more comfortable than the still, 30°C+ days of July and August. Shoulder-season crowds mean shorter waits at the tunnel bottleneck near the summit.Booking tipReservations are required and open 30 days in advance. Book the earliest time slot for cooler temperatures and thinner crowds.
Snorkel at Hanauma Bay
water sportsThis protected marine preserve in a volcanic crater on O'ahu's southeast shore holds over 400 species of fish. The inner reef is shallow enough to stand in, and green sea turtles frequently glide through the deeper channels. The water clarity in May is typically excellent.
May's calmer seas and reduced winter runoff improve visibility in the bay. Weekday crowds are noticeably lighter than the packed summer months when mainland families arrive.Booking tipOnline reservations are required. Wednesday and Thursday mornings tend to have the most availability.
Surf the south shore
water sportsAla Moana Bowls, Canoes, and Queens off Waikiki break consistently on south swells that start filling in during May. Bowls is a faster, hollow left suited to intermediate and advanced surfers. Canoes and Queens are gentler waves where beginners on longboards can catch rides alongside outrigger canoe crews.
The first south swells of the season arrive in May after months of flat water on the south-facing coast. Lineups are still manageable before the packed summer sessions begin in June.Booking tipBoard rentals are available along Kalakaua Avenue in Waikiki. Lessons typically run 90 minutes and launch from the sand near the Duke Kahanamoku statue.
Walk the Kailua Beach to Lanikai loop
beachA flat walk along Kailua Beach's 4 km of pale sand, then through a residential neighborhood to reach Lanikai Beach and its views of the Mokulua Islands. The turquoise water here is some of the clearest on O'ahu, and the offshore islands are reachable by kayak.
The windward side gets less rain in May than in the preceding winter months, and the trade winds keep the beach comfortable without the dead-calm heat of late summer. Weekday mornings feel almost private.Booking tipParking in the Lanikai neighborhood is extremely limited. Park at Kailua Beach Park and walk south along the shore.
Explore Chinatown's markets and galleries
cultureHonolulu's Chinatown district covers several blocks between Nu'uanu Avenue and River Street. The Oahu Market and Maunakea Marketplace sell fresh fish, tropical fruit, and prepared foods. First Friday gallery walks fill the neighborhood's art spaces on the first Friday of each month.
May's First Friday falls early in the month, pairing well with the Lei Day weekend for a culture-heavy start to the trip. The indoor markets provide a break from any afternoon rain.Booking tipFirst Friday events run from roughly 5 PM to 9 PM. Some galleries pour complimentary wine, and the street food vendors set up along Hotel Street.
Kayak to the Mokulua Islands from Lanikai
water sportsA 1.6 km paddle from Lanikai Beach to Moku Nui, the larger of the two offshore islands. The landing beach on the island's leeward side is sheltered, and a short trail leads to a tide pool on the windward face. Seabirds nest on both islands, and the paddle itself passes over coral reef in clear water.
May's trade winds are steady but not yet at their summer peak, making the crossing more manageable for recreational kayakers. The water is warm enough at 25°C that a capsize is refreshing rather than cold.Booking tipKayak rentals are available from outfitters in Kailua. Launch early in the morning before the wind picks up, and check conditions with the rental shop before heading out.
Visit 'Iolani Palace
cultureThe only royal palace on American soil, built in 1882 for King Kalakaua. The interior tour covers the throne room, the bedroom where Queen Lili'uokalani was held under house arrest during the 1893 overthrow, and the basement gallery of crown jewels and royal artifacts. The building had electricity before the White House.
May's shoulder-season attendance means guided tour groups are smaller, and docents have more time for questions. The palace grounds are shaded by large trees, making the outdoor portions comfortable even on warmer afternoons.Booking tipGuided tours tend to sell out. Book online at least a few days ahead, especially for weekend slots.
Hike the Makapu'u Lighthouse Trail
hikingA paved 1.6 km trail on O'ahu's easternmost point with views of the lighthouse, Rabbit Island, and the open Pacific. The path climbs 150 meters from the parking lot to the lookout. On clear May mornings, you can see Moloka'i and Lana'i across the Kaiwi Channel.
Whale season is over, but the lookout still rewards with nesting seabird activity on the offshore islands. The paved surface makes this an accessible option after a rain shower, when muddy trails elsewhere become slippery.Booking tipThe parking lot fills by mid-morning on weekends. Arrive before 8 AM or go on a weekday.
What to eat in May
In season: fruit
Lychee
Local lychee season starts in May across O'ahu's windward farms. You'll find bags sold at roadside stands along Kamehameha Highway near Kahalu'u, and at the KCC Farmers Market on Saturday mornings. The fruit is smaller than imported Thai varieties but tends to be sweeter, with a floral fragrance that fills the car when you crack a bag open.
Apple banana
Hawai'i's short, stubby apple bananas reach peak sweetness in May. They're denser and tangier than the Cavendish variety, with a slight citrus note. Pick them up at the Wednesday farmers market in Kailua or any Foodland supermarket across Honolulu.
Mango
Early mango season begins in May on O'ahu. The Hayden and common varieties start appearing at farmers markets and on neighborhood trees across Manoa and Kaimuki. The fruit is still limited compared to the June-July peak, but what shows up tends to be fragrant and firm.
On menus now
Poke
Technically available year-round, but May's warmer waters mean ahi tuna catches pick up. Foodland's poke counter runs seasonal specials, and Ono Seafood in Kapahulu serves some of the freshest ahi poke on the island. The sesame oil and limu seaweed version is the local standard.
Shave ice
Honolulu's answer to the snow cone, though locals will correct you if you call it that. May's warming days make this the start of proper shave ice season. Matsumoto's in Haleiwa has the tourist fame, but Waiola Shave Ice on Kapahulu Avenue tends to get the local vote. The texture should be powdery and fine, not crunchy.
Regular events in May
First Friday HonoluluFree
Chinatown's galleries, shops, and restaurants open their doors for an evening art walk on the first Friday of each month. Live music, food vendors, and pop-up exhibits fill the blocks around Nu'uanu Avenue.
First Friday of May, 5 PM - 9 PMKCC Farmers MarketFree
The Saturday morning market at Kapi'olani Community College draws vendors selling local produce, honey, coffee, prepared foods, and flowers. It runs year-round but May brings the first lychee and early mango of the season.
Every Saturday, 7:30 AM - 11 AMHonolulu Night MarketFree
A monthly street market in Kaka'ako's warehouse district featuring local food trucks, live DJs, art vendors, and clothing brands. The Our Kaka'ako neighborhood hosts the event along Cooke Street.
Third Saturday of May, 6 PM - 10 PMMemorial Day ceremony at PunchbowlFree
The National Memorial Cemetery of the Pacific in Punchbowl Crater holds a formal Memorial Day observance with military honors, lei placement on graves, and a flyover. Over 30,000 veterans are interred at the site.
Memorial Day (last Monday of May), morning ceremonyBest places this May
Kapiolani Park
parkA 121-hectare park at the foot of Diamond Head, home to the Lei Day celebration on May 1. The park includes the Honolulu Zoo, the Waikiki Shell amphitheater, and wide banyan-shaded lawns. Weekend mornings bring joggers, yoga groups, and art fairs.
WaikikiHanauma Bay Nature Preserve
natureA protected snorkeling bay inside a volcanic crater on O'ahu's southeast coast. The inner reef teems with parrotfish, tang, and butterfly fish. Closed Mondays and Tuesdays for reef recovery.
East HonoluluAla Moana Beach Park
beachA long crescent of calm, reef-protected water between Waikiki and downtown. The park hosts Lantern Floating Hawaii on Memorial Day evening. Local families picnic under the ironwood trees on weekends, and the offshore reef break draws intermediate surfers.
Ala MoanaManoa Falls Trail
hikingA 2.6 km round-trip hike through a tropical rainforest to a 46-meter waterfall in Manoa Valley. The trail is muddy after rain, which is likely on any given May afternoon. The canopy overhead filters the sunlight into green-tinted shade, and you can hear the stream the whole way.
ManoaBishop Museum
museumHawai'i's largest museum of natural history and Hawaiian culture, founded in 1889. The Hawaiian Hall's three-story collection covers Polynesian voyaging, the Hawaiian monarchy, and native ecology. The planetarium runs daily shows.
KalihiKaimana Beach
beachA quieter stretch of sand at the Diamond Head end of Waikiki, past the concrete wall of the Natatorium. Locals call it Sans Souci. The water is calm and clear, and you might spot a monk seal hauled out on the sand, particularly in the warmer months.
WaikikiPearl Harbor National Memorial
historic siteThe USS Arizona Memorial sits above the sunken battleship in Pearl Harbor. The visitor center museum is free, and boat tours to the memorial run throughout the day. May's lower tourist numbers mean shorter wait times for same-day tickets than the winter peak.
Pearl Harbor
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Insider tips
The leeward (west) side of O'ahu, from Ko Olina to Makaha, gets significantly less rain than Waikiki and the windward coast. If your May afternoon turns gray on the east side, a 40-minute drive west usually finds sun.
Foodland supermarkets run a poke counter that competes with any dedicated poke shop in town. The Ala Moana location stays open late and rotates seasonal preparations that most tourist-oriented spots don't carry.
The bus system, called TheBus, runs a route from Waikiki to Hanauma Bay that takes about 30 minutes. It beats fighting for parking at the bay's small lot, especially on weekend mornings.
Lei Day on May 1 is a state holiday, and some government offices and banks close. Plan any administrative errands for another day.
Kaimana Beach (Sans Souci) at the Diamond Head end of Waikiki is where residents go to avoid the tourist density of the main Waikiki strip. The water is calmer, the sand less crowded, and there's a monk seal that hauls out regularly.
The Honolulu Museum of Art on Beretania Street has a courtyard cafe that serves lunch in a quiet, shaded garden. Worth visiting even if you skip the galleries.
Avoid these mistakes
- Booking a whale watching tour in May. The humpback season ends in April, and operators who still sell May trips are selling empty ocean. Confirm the season dates before paying.
- Skipping sunscreen on overcast days. O'ahu sits at 21°N latitude, and UV penetrates cloud cover. Burns happen fast, even when the sky looks gray.
- Driving to the North Shore expecting big surf. The winter swell season is over by May, and the famous breaks at Pipeline, Sunset, and Waimea Bay are flat. The North Shore is still worth visiting for Haleiwa town and the food trucks, but not for wave-watching.
- Underestimating the Manoa Falls trail after rain. The path turns into slick red mud, and the rocks near the waterfall pool are mossy. Proper footwear matters more than fitness here.
- Assuming Memorial Day weekend will feel like shoulder season. That single weekend sees a sharp jump in both crowds and hotel pricing across Waikiki and Ala Moana. If value is the priority, book the weeks before or after.
Practical tips for May
May straddles Honolulu's wet and dry seasons, so pack for both sun and brief rain. Reserve Hanauma Bay and Diamond Head online in advance, as both require timed-entry bookings that fill up even in shoulder season. Rental cars are cheaper in May than during peak winter or summer, but parking in Waikiki remains tight and expensive at hotel garages. TheBus covers most of O'ahu for a flat fare per ride. Reef-safe sunscreen is law in Hawai'i, and shops at the airport sell compliant brands if you forget to pack one. The UV index in May regularly hits 11 or higher, so reapply every 90 minutes when outdoors. Restaurant reservations in Waikiki are less critical than in winter, but popular spots in Kaimuki and Chinatown still fill up on weekend evenings.
FAQ
Is May a good time to visit Honolulu for beach weather?
May is consistently warm and sunny, with daytime highs near 27°C and water temperatures around 25°C. You'll likely get brief afternoon showers on some days, especially on the windward side, but mornings tend to be clear and the rain rarely lasts more than 20 minutes. It's reliable beach weather by any reasonable standard.
Can you still see whales in Honolulu in May?
No. Humpback whale season in Hawaiian waters runs roughly from December through April. By May, the whales have migrated north toward Alaska. Any tour operator selling whale watches in May is unlikely to deliver sightings.
How crowded is Honolulu in May compared to other months?
May falls in the shoulder season between the winter peak (December-March) and the summer family-travel wave (mid-June through August). Outside of Memorial Day weekend, you'll find noticeably shorter lines at attractions like Diamond Head and Hanauma Bay, and hotel availability is better than in either peak window.
What is Lantern Floating Hawaii and do I need tickets?
Lantern Floating Hawaii is a Memorial Day evening ceremony at Ala Moana Beach Park where roughly 50,000 people gather to launch paper lanterns on the water at sunset. Organized by the Shinnyo-en temple, it honors deceased loved ones. The event is free and open to the public, with no tickets required. Arrive early to secure a viewing spot near the water's edge.
Is it worth renting a car in Honolulu in May?
It depends on your plans. Waikiki, Diamond Head, and Ala Moana are walkable or reachable by TheBus. But if you want to explore the North Shore, the windward coast, or the leeward beaches around Ko Olina, a car saves significant time. May rental rates tend to be lower than peak-season pricing, and weekday traffic outside of Honolulu proper is manageable.
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