Ask any Key West local when to visit and a lot of them will tell you May. Spring break crowds are gone, summer heat hasn’t fully settled in, hotel rates drop, and the water is warm enough to stay in all afternoon. It’s a month that doesn’t get nearly the attention it deserves, which means you can actually enjoy the place instead of fighting for a parking spot on Duval Street.
Here’s what’s worth doing on the water and on land in May this year.
Why May Works So Well in Key West
The timing is genuinely good. Average highs sit around 85°F with evenings in the upper 70s. It’s comfortable, breezy, and nothing like the thick humidity of August. The rainy season doesn’t start until June, so most of May gives you blue skies and calm mornings. Seas tend to be flatter than winter months, which is good news if you’re planning any kind of boat trip.
Water temperatures climb to 78–82°F by mid-month. That’s warm enough to snorkel without a wetsuit and stay in long enough to actually see things. Visibility is typically solid often 20–35 feetm, especially on calmer days earlier in the week when boat traffic is lighter.
The other thing May has going for it: the tourist volume drops just enough. You’re not fighting for a table at every restaurant or waiting in line for 45 minutes to board a snorkel boat. The city is still alive and active, but there’s breathing room.
Get on the Water First
This is Key West. The reef, the sandbars, and the backcountry are the whole reason the island punches above its weight as a destination. If you spend the majority of your visit on dry land, you’re missing it.
Snorkeling
May is one of the better months for snorkeling. Water visibility is good, temperatures are comfortable, and the reef is active. You don’t need any experience. Tours are designed to be accessible but if you’ve never snorkeled before, the Florida Keys reef system is an excellent introduction. You’ll see parrotfish, angelfish, barracuda, nurse sharks, and the occasional sea turtle if you stay patient and quiet.
Captain Hook’s runs snorkeling trips out of Key West that are a good option whether you’re a first-timer or someone who just wants a reliable boat with a crew that knows the reefs. Check departure times and book ahead. Popular departures fill up faster than you’d expect even in shoulder season.
Scuba Diving
If you’re certified, May is worth building a dive trip around. The Vandenberg wreck – a 524-foot decommissioned military ship sunk intentionally as an artificial reef – is one of the most impressive wreck dives in the Atlantic. It sits at 40–140 feet and supports an enormous amount of marine life. Visibility on good days can stretch past 30 feet. Beyond the Vandenberg, the shallow reefs around Key West offer good dives for all skill levels. May conditions tend to be calmer than January or February, making for more comfortable boat rides out to the sites. Captain Hook’s Dive Key West offers both reef and wreck trips and has a full rental setup if you’re traveling without gear.
Sandbar Trips
Key West has some genuinely excellent sandbars. They’re shallow, clear-water flats where you can wade, swim, and float in water that looks like it belongs in a Caribbean travel ad. It’s a different experience from a reef trip: slower paced, more social, and something you can do with people who aren’t interested in snorkeling.
Captain Hook’s runs sandbar trips out of Key West throughout the season. If you’re visiting in May, it’s worth looking at what’s available and booking early, especially around Memorial Day weekend.
Memorial Day Weekend (May 23–25): The Best Way to Spend It
Memorial Day weekend is the unofficial start of summer, and Key West does it right. The city has a natural long-weekend energy. More people out, more events, more of that end-of-spring momentum that makes the holiday worth actually celebrating.
On Sunday, May 24, Captain Hook’s is running a Memorial Day Sandbar & Sunset Cruise
Departing at 2 PM from Perry Hotel Marina. It’s a 6-hour trip that takes you out to the sandbar for the afternoon and carries you into sunset on the water for one continuous experience instead of two separate bookings.
BYOB beer and wine is welcome (no glass), a light patriotic snack package is included, the crew does a group photo at sunset, and you get Perry Hotel pool access after the cruise.
Only 32 seats are available. It’s a public event, not a private charter, which makes it a solid choice for couples, small groups, or anyone who wants a social Memorial Day afternoon without organizing a private boat. The event honors active military and veterans.
Also on May 24: the 35th Annual Minimal Regatta at Schooner Wharf Bar.
Teams build boats from a single sheet of plywood, two 2x4s, duct tape, and a pound of fasteners then race them. Prizes go to fastest, most creative, best paint job, best costume, and the “sinker” award for the least seaworthy vessel. It’s free to watch, genuinely funny, and very Key West.
May Events Worth Planning Around
Key West Songwriters Festival (late April – early May)
This is one of the best festivals in the Southeast and it’s consistently underrated outside of country music circles. Songwriters (not performers), the actual writers behind the hits, play intimate sets across 30+ venues around the island. You’ll hear songs you know performed by the person who wrote them, often with the story behind them. Sets happen in bars, on boats, on outdoor stages, and in venues you’d never find on your own. The scale of it is impressive: past alumni include Kacey Musgraves, Florida Georgia Line, Maren Morris, and Jake Owen, all before they were household names. Check the schedule. Many shows are free or very low cost.
Key West Paddle Classic (May 7–10)
A 12-mile paddleboard race circumnavigating the island of Key West. It’s open to paddleboards, kayaks, outrigger canoes, surf skis, and prone boards, and there’s also a 4-mile open race for recreational paddlers. Even if you’re not competing, the race route takes participants past the historic seaport, through mangroves, and along the Atlantic shoreline — it’s worth wandering down to watch a section of it.
Cinco de Mayo (May 5)
Key West needs very little excuse for a party, and Cinco de Mayo is a proper one. Sunset sails, margarita specials, and the usual Duval Street energy. If you’re in town, you’ll find it regardless of whether you go looking.
On Land: What’s Worth Your Time
Mallory Square Sunset Celebration
Every night, the waterfront at Mallory Square fills with street performers, local artists, and people who came specifically to watch the sun go down over the Gulf. Fire jugglers, acrobats, musicians, chainsaw carvers. It’s an actual street performance scene, not just a gathering. Show up 30–45 minutes before sunset and find a spot on the seawall. It doesn’t cost anything and it’s one of those Key West experiences that actually lives up to its reputation.
Fort Zachary Taylor State Park
The best beach access in Key West is at Fort Zach. The beach is small but the water is clear and there are coral heads just offshore worth snorkeling around. The Civil War-era fort is also genuinely interesting if you spend 30 minutes walking through it. Admission is a few dollars per person, parking fills up on weekends, and it closes at sunset so time it right.
Ernest Hemingway Home & Museum
Whether you’re a Hemingway reader or not, the house is worth it. The architecture, the history, the actual writing studio where he worked, and the famous polydactyl cats that still live on the property. There are reportedly over 50 of them, many with six toes, all named after celebrities. Tours run throughout the day and the whole thing takes about an hour.
Dry Tortugas National Park
Seventy miles west of Key West by ferry, Dry Tortugas is a genuinely different experience. Fort Jefferson, a massive 19th-century brick fort surrounded by open ocean, sits on the main island. Snorkeling around the fort is excellent, the water is some of the clearest in the Keys, and the remoteness makes the whole trip feel like a real adventure. Ferry departures from Key West typically leave early morning. Book in advance, especially on holiday weekends.
The Truman Waterfront Farmers Market
Every Thursday at Truman Waterfront Park, a local market runs with fresh produce, prepared food, crafts, and the kind of casual social scene that makes farmers markets worth going to. Good conch fritters and a nice way to spend a morning before heading out on the water in the afternoon.
Ready to Book?
Start with whatever gets you on the water. A snorkel trip, a dive charter, or a sandbar afternoon. Build the rest of the day around it. May in Key West rewards people who actually get out there rather than spending the whole trip planning to.
If you’re visiting for Memorial Day weekend, the Memorial Day Sandbar & Sunset Cruise on May 24 is worth reserving now. t’s a great way to spend a Sunday afternoon on the water and wrap up the weekend properly!