Welcome to the Biscayne National Park Weather Guide Check out the links below to find current weather conditions in the park, the regional short term temperature and precipitation forcast, special advisory bulletins, satellite or radar data, and state average climate information.
Biscayne's subtropical climate is characterized by warm, wet summers (May through Oct) and mild, dry winters (Nov through Apr). Expect abundant sunshine and high humidity year round. High temperatures average in the high 80s and low 90s in summer and in the mid 70s and low 80s in winter. Annual rainfall fluctuates greatly, but 65 inches or more are common. Most rain falls in summer in brief, intense afternoon thunderstorms. Summer and fall are peak seasons for tropical storms and hurricanes.