Weather in Florida in August

How August compares

August is the 2nd warmest month of the year in Florida. Within United States it is 3rd of 6 (United States in August). Against London's average high of 21.4°C in August, Florida is 9.2°C warmer by day and 11.5°C warmer at night.

Daytime and night-time in August

The typical August day in Florida peaks at 30.6°C, but that is an average: the warmest 10% of days reach 32.5°C or more. About 100% of days top 25°C and almost every pass 30°C. Nights average 25.0°C; one night in ten drops to 23.9°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest August day here reached 36.7°C (2006-08-11) and the coldest night 19.9°C (1997-08-28).

Rain in August

Wet (more than 8 rainy days): about 23 days with 1 mm or more, 160 mm in total. Year to year it varies a lot - the wettest August was 2017 with 375 mm, the driest 2007 with 51 mm. Humidity averages 80%, which makes the heat feel heavier than the thermometer suggests.

Sea temperature in August

The sea averages 29.9°C - warm enough to swim (22°c+). Depending on the year it ranges from 29.4°C to 30.4°C. This is the warmest the sea gets here all year.

Sunshine and daylight

Around 4.7 hours of sunshine a day (estimated from cloud cover), 12.9 hours of daylight: the sun rises about 06:55 and sets about 20:05 local time in mid-August. Average cloud cover is 64%.

Is August a good time to visit Florida?

It is a reasonable choice: hot days but expect showers. The best months for Florida on our scoring are March, April, November; months averaging 25°C or more: Apr, May, Jun, Jul, Aug, Sep, Oct, Nov.

Heat that needs planning around

August is among Florida's hottest months, with daytime highs averaging 30.6°C compared with London's 21.4°C. Humidity averages 80%, so plan for conditions that can feel sticky rather than simply warm. Loose, breathable clothing and regular drinks are sensible, while the middle of the day is a good time to pause somewhere cool. Temperatures reach 30°C on 68% of days, so sustained outdoor activity is likely to be more comfortable with frequent breaks. Evenings offer little real cooling, with average lows of 25°C. This suits travellers comfortable with persistent heat better than those hoping for fresh nights after sunny days.

Frequent rain, but not a reason to write off every day

Rain is a regular part of August: about 23 days receive at least 1 mm. That makes a completely dry holiday a poor expectation, but a rainy day does not necessarily mean rain throughout the day. Keep outdoor plans movable and have an indoor alternative rather than committing every day to weather-dependent activities. A light waterproof is more practical than a heavy coat in this heat. There are about 4.7 hours of sunshine within 12.9 hours of daylight, so long days should not be confused with uninterrupted sun. August is a difficult fit if reliable dry weather is your main reason for travelling.

Warm swimming, with little cooling from the water

The sea averages 29.9°C, making August a good fit if cold water normally puts you off swimming. It is warm enough for comfortable bathing, though it will offer less of a cooling contrast to the air than you might want on a hot day. Swimwear, light clothes and sun protection belong in your packing, alongside something for the rain. The combination of warm water, high humidity and warm nights favours a relaxed pace rather than a packed outdoor schedule. If swimming is central to your holiday and you are happy to adjust around wet weather, August has a clear appeal.