The highest day temperature in August 2025 was 93°F. The lowest night temperature was 85°F. The average values for day and night temperatures during August were 90.7°F и 88.2°F respectivly.

The average sea surface temperature in August 2025 for Islamorada was 93.1°F. The maximum and minimum values were 90.6°F and 95.0°F respectively.

Most of the days in August are cloudy but you can also expect sunny or gloomy days.

Precipitation total in August for Islamorada is 1.5 in. It makes august one of the most rainy months of the year.

The average wind speed in August is 10.5 mph. It makes August one of the most windless months of the year for Islamorada.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Islamorada in August is 6.5 hours.