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Current Key West weather, 5 day forecast, monthly high and low average temperatures, rainfall, real time satellite/radar and monthly average ocean temperature plus details on the best weather seasons to visit. Also learn about major hurricanes that have impacted the area.
Satellite data and images provided by Weather Underground Inc.
With a few exceptions in the winter, when cold air pushes down the east coast, the Key West weather is generally warm all year. Influenced by the warm waters of the northern Caribbean, Key West average high temperatures are in the mid to high 80s in the summer and mid to high 70s in the winter. Key West weather is very similar to that of Miami but just a few degrees warmer.
Between late May and early October, the weather is extremely humid and rainfall plentiful. This is also hurricane season and due to the location of Key West, strong storms often pass nearby.
The most pleasant time to visit Key West is in late October through April. Days are in the high 70s to low 80s and nights pleasant in the 60s and 70s. May can be hit and miss with rain and humidity.
The rainy season coincides with hurricane season. The summer months are very humid with much more rain than in the winter months. However, there are many summer days that have great weather. Hint! - If you don't like really hot and humid, go to Key West in January, February or early March.
Key West is located adjacent to the northern Caribbean where water is generally warm all year. Ocean temperatures rarely drop below 70 degrees and the water is crystal clear making water sports such as paddle boarding, diving, snorkeling and fishing very popular.
If you have ever been to Key West and seen for yourself how flat the area is, just barely above sea level, you would wonder how anything ever survives any type of major storm. Even nice weather with high tides during a full moon will bring water up from the storm drains and flood some of the downtown streets.
Knowing this it is hard to imagine the impact of the category 4 hurricane that made a direct hit on Key West on September 10, 1919 that killed more than 600 people.
Other big hurricanes include George with 105 mph winds in 1998 and in 1948, three hurricanes, all in the month of September.
Hurricane seasons runs from June through December with the most activity usually being in August and September.