Cozumel Weather in August
In Cozumel, August brings very high daytime temperatures around 30°C (86°F), with nights cooling to 27°C (81°F). Expect quite a bit of rainfall this month.
Rainfall in Cozumel in August
The climate data from previous years indicates about 13 days of rain, averaging 115 mm (4.5 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Cozumel in August
If you're visiting Cozumel in August, expect highs of 30°C (86°F) and overnight lows around 27°C (81°F). Mornings and evenings are often more comfortable than the peak afternoon hours. At 27°C (81°F) overnight, the heat doesn't let up much after dark. If you're staying somewhere without air conditioning, a cold shower before bed and keeping the air moving can help. These temperatures represent the average, but hotter days can occur. Be prepared with light clothing and stay hydrated to manage the heat.
Sunshine in Cozumel in August
There are approximately 220 hours of sunshine this month, resulting in mostly clear days.
Average water temperature in August
At 29°C (84°F), the water is very warm — more like a heated pool than the sea. Great for those who like warm water, though some may find it less refreshing on a hot day.If you prefer enjoying temperate temperatures and rain-free days, January, February, March, April, May and December typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Mexico, check out our Cozumel's climate page.
Cozumel Temperature in August
Min Temperature
27°C (81°F)
Max Temperature
30°C (86°F)
Water Temperature
29°C (84°F) *
Chance of Rain
42%
Precipitation
115 mm (4.5 in)
Rainy days
13 days
Sunshine
220 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Cozumel typically stay consistent throughout August, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in August
Historical weather for Cozumel in August
Browse day-by-day weather records for Cozumel spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Cozumel historical weather extremes in August
Our historical data for Cozumel spans 1976 to 2025, revealing these weather extremes.
- On August 14, 1977, temperatures climbed to 39°C (102°F), marking the warmest August day on record.
- The lowest daytime temperature in August was 27°C (81°F), recorded on August 15, 2013.
- Nighttime temperatures dropped to 17°C (63°F) on August 27, 2012, marking the coldest August night on record.
Best Places in Mexico in August
Find out more about the weather in Mexico and which places have the best travel conditions in this month. See all of Mexico in August →
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What to Wear in Cozumel in August
Warm but pleasant conditions in Cozumel in August. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. Expect water temperatures of around 29°C (84°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Cozumel in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Mexico, check out our Cozumel's climate page.
Temperature Rainfall Sunshine Water Temp
See the full Cozumel climate overview or explore weather in Mexico.
