The highest day temperature in August 2025 was 98°F. The lowest night temperature was 84°F. The average values for day and night temperatures during August were 92.4°F и 85.8°F respectivly.

The average sea surface temperature in August 2025 for Cozumel was 89.6°F. The maximum and minimum values were 89.0°F and 90.2°F respectively.

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

Precipitation total in August for Cozumel is 4.5 in. It makes august one of the most rainy months of the year.

The average wind speed in August is 8.6 mph. This value is relatively stable throughout the year.

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 Cozumel in August is 7.5 hours.