Swimming in the United States (USA) in may 2025 Sea temperature by city in may

In may in the United States (USA) swimming conditions vary by city. Details below:

In may in Miami, Key West, Florida, Biscayne National Park, Boynton Beach, Captiva Island, Fort Lauderdale, Fort Pierce and Key Largo, swimming conditions are perfect! With water reaching a maximum of 86°F and an average of 81°F, going in the water (and staying there!) feels great.

As for Honolulu (Oahu), New Orleans, Hawaii, Kauai (Garden Isle), Maui, Hilo, Captain Cook, Hana, Houston, Kahului, Kekaha, Kilauea, La'ie, Molokai, Myrtle Beach, Niihau, Pahala, St. Augustine, Tampa, Waianae, Anna Maria Island, Apalachicola, Caladesi Island, Cameron, Carolina Beach, Cedar Key, Clearwater, Cocoa Beach, Dauphin Island (Alabama), Edisto Beach, Egmont Key, Fort Walton Beach, Grand Isle, Gulf Islands National Seashore, Gulf Shores (Alabama), Hernando Beach, Holly Beach, Houma, island of Hawaii (Big Island), Jacksonville, Kahoolawe, Lake Charles, Lanai, Lido Key and Lihue, swimming is pleasant in may. The sea water is 79°F on average (min: 77°F/max: 80°F) so you can easily spend time in the water.

Swimming in may in Encinitas is possible but the sea is generally cool. So though the sea temperature may sometimes reach 67°F, it can also go as low as 60°F. Note that the average is 63°F.

Swimming in may in California, Los Angeles , San Diego, Hollywood, Malibu and Manhattan Beach is possible... with a wetsuit! Indeed, the water is cold at this time of year with an average temperature of 62°F (min: 59°F/max: 66°F).

Forget about swimming in Anchorage, Washington D. C., Boston, New York City, San Francisco, Seattle, Anchor Point, Dillingham, Dutch Harbor, Ketchikan, Long Beach (Washington), Philadelphia, Portland, Atlantic City, Baltimore, Bar Harbor (Maine), Big Sur, Brooklyn, Cambria, Cape Cod National Seashore, Carmel-by-the-Sea, Channel Islands National Park, Cordova, Crescent City, Eureka, Gambell (St. Lawrence Island), Gaviota, Golden Gate National Recreation Area, Gualala, Haines, Half Moon Bay, Hampton Beach, Jenner, Kenai, Klamath, Kodiak, Kotzebue, La Push (Washington) and Lincoln City (Oregon) in may! The water temperature is freezing, reaching as low as 38°F (and only 47°F at the best of times). Our advice: plan on sightseeing, and don't bring your beach towel!