Florida Keys in May | Tranquility Bay Resort

Travel Tips, Weather, Events and Deals

Make way for Mother's Day and Memorial Day in May! Pamper mom with a relaxing Mother's Day Florida Keys vacation, or for Memorial Day you can dive into an exciting long weekend with amazing onsite watersports adventures. May is the perfect month to soak up the Florida sunshine before the island heats up for summer. Families or friends traveling together can discover our spacious two and three-bedroom Florida Keys beach houses, while couples love a romantic retreat in our more intimate Tropical Garden Guestrooms.

Marathon Weather in May

The island starts to warm up in May with an average high temperature of 85° F. At the peak of summer, the average high is 89° F. Even when temperatures are high, Marathon is fortunate not to have any super-highways or urban sprawl to radiate the sun's heat. Not only that, but our islands are surrounded by cooling ocean waters. By late May, the season's first thundershowers start popping up. Rarely do the storms stick around long enough to spoil an entire day.

Average High Air Temp

85° F (29° C)

Average Low Air Temp

76° F (24° C)

Average Water Temp

83° F (28° C)

Average Rainfall

3.5 inches (8.9cm)

Average Sunset Time

7:58 p.m. (19:58)

What to Wear in May

Pack your summer gear, including flip flops, a swim suit, shorts and a light shirt, but it's always wise to bring light layers that you can add to your wardrobe when needed. If you go boating for example, bring a light jacket. May can see high temperatures so make sure to bring light, cool clothing for daytime activities. Don't forget your sunglasses, aloe, sun screen and a hat to protect you against UV rays. Take bottled water with you to the beach and for other daytime activities.

Major May Events and Holidays

In May, enjoy a long weekend for Memorial Day or join us for a Mother's Day escape.

May Federal Holidays and Important Travel Dates in 2018

May 13: Mother's Day (USA)
May 28: Memorial Day

Top Marathon and Nearby Florida Keys Events in May

May TBC, 2018: Tarponian Tournament
May TBC, 2018: Marathon Offshore Bull and Cow Dolphin Tournament
May TBC, 2018: Key West Songwriters' Festival
May TBC, 2018: Battle in the Bay Dragon Boat Festival
May TBC 2018: Keys 100 UltraMarathon
May TBC 2018: Dolphin Masters
View all May 2018 Events

Visiting the Florida Keys in May