Cozumel Sea Temperature
Updated Sat 06:37 (America/Cancun)
Mexico · Forecast updated Aug 8, 2026, 06:37 UTC
Current Sea Temperature
29.4°C
84.9°F
Very warm water
Versus this month's average
Close to average
The August average in our archive is 29.6°C (85.3°F).
Recent trend
Holding fairly steady
Seven-day average: 29.6°C, versus 29.7°C in the prior seven days.
What to wear
Very warm water
Swimwear is usually enough; a rash guard adds sun protection.
Cold tolerance varies. Wind, session length, sunshine, and exertion also affect comfort; temperature alone does not describe sea conditions.
Sea Surface Temperature Over the Year
In the data collected for Cozumel, monthly averages range from about 29.0°C (84.2°F) in June to 29.6°C (85.3°F) in August.
Over the past 30 days, the average sea temperature in Cozumel has been 29.5°C.
Monthly Water Temperature Averages
| Month | Min | Average | Max |
|---|---|---|---|
| June | 28.7°C / 83.7°F | 29.0°C / 84.2°F | 29.5°C / 85.1°F |
| July | 29.1°C / 84.4°F | 29.5°C / 85.1°F | 30.4°C / 86.7°F |
| August | 29.2°C / 84.6°F | 29.6°C / 85.3°F | 30.1°C / 86.2°F |
Profile calculated from 1646 hourly forecast records across 3 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Cozumel
Caribbean island on the Mesoamerican Reef with drift snorkeling over coral gardens.
- Area
- Quintana Roo
Cozumel Water Temperature: Common Questions
What is the sea temperature in Cozumel today?
The current sea surface temperature in Cozumel is 29.4°C. Over the last 30 days, the average has been 29.5°C.
When is the water warmest in Cozumel?
The warmest monthly average in the Cozumel archive is August, at around 29.6°C (85.3°F).
When is the water coldest in Cozumel?
The coldest monthly average in the archive is June, at around 29.0°C (84.2°F).
Can you swim in Cozumel today?
At 29.4°C, the water is usually comfortable for swimming and snorkeling.
Full Snorkeling Forecast
See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Cozumel.
View Snorkel Forecast →