May is a quiet shoulder-season month on Marco Island, with average highs of 87°F and overnight lows around 72°F. The Gulf water reaches 78–80°F — warm and comfortable for swimming — and brief afternoon showers begin appearing late in the month. Expect light crowds and rates significantly lower than peak winter season.
Air Temperature
Mid-to-upper 80s°F
Gulf Water
78–80°F
Crowds
Shoulder season — quiet
Brief afternoon showers start appearing in late May but mornings are typically beautiful. Restaurants have shorter waits, beaches have more space, and vacation rental availability is much better than peak season.
Gulf water temps are perfect. Paddleboarding, kayaking, and swimming are all excellent.
One of the best months for fishing. Tarpon season peaks in May and June. Snook and permit are also active.
Still good shelling at Tigertail Beach at low tide in the morning.
Very active in May as baitfish move through the Marco River. Guests at Riverside Relaxation see them from the lanai daily.
One of the last great months before summer heat peaks. Kayaking and wildlife tours are excellent.
Waterfront condo at Riverside Club — private lanai, resort pools, full beach kit — at rates better than peak season. 63 five-star reviews, Airbnb Guest Favorite. Book direct at riversiderelaxation.com and save 20–30% over Airbnb or VRBO.
Book Direct & SaveShoulder season rates, warm water, empty beaches.
Book Direct & SaveMay is one of Marco Island's most underrated months. The snowbirds and spring break crowds are gone, leaving peaceful, uncrowded beaches. Highs reach the mid-to-upper 80s°F with warm Gulf water at 78–80°F. Rates are significantly lower than peak season, and restaurant waits are minimal. May offers excellent value.
Yes — May is excellent for swimming. Gulf water temperatures reach 78–80°F, which is warm and comfortable for extended swims. The water is warmer than April and approaching summer temperatures. May is ideal for water sports including paddleboarding, kayaking, and snorkeling near the jetties.
Brief afternoon showers start appearing in late May, but mornings are typically beautiful and clear. Rain rarely disrupts an entire day — storms are short and pass quickly. Plan beach activities for the morning and use afternoons for shopping, the resort pools, or a nap. May is much drier than the summer months.
Yes — May is one of the best months for tarpon fishing in Southwest Florida. Tarpon season peaks in May and June, drawing serious anglers from around the world. Snook and permit are also active. Book fishing charters in advance, as May is popular among fishing enthusiasts visiting Marco Island.
Last updated: October 2026