Cancún water temperature
The sea off Cancún is warmest in August, around 85°F (29°C), and coolest in February, around 80°F (27°C).
Photo: Luka Peternel, CC BY-SA 4.0
Sea temperature by month
| Month | Sea | Feels | Air high |
|---|---|---|---|
| January | 80°F (27°C) | Warm | 83°F |
| February | 80°F (27°C) | Warm | 85°F |
| March | 80°F (27°C) | Warm | 87°F |
| April | 81°F (27°C) | Bath-warm | 90°F |
| May | 82°F (28°C) | Bath-warm | 92°F |
| June | 83°F (29°C) | Bath-warm | 92°F |
| July | 84°F (29°C) | Bath-warm | 93°F |
| August | 85°F (29°C) | Bath-warm | 94°F |
| September | 85°F (29°C) | Bath-warm | 92°F |
| October | 84°F (29°C) | Bath-warm | 89°F |
| November | 83°F (28°C) | Bath-warm | 86°F |
| December | 81°F (27°C) | Bath-warm | 84°F |
Average sea-surface temperature just offshore, 1991–2020. Water in shallow bays runs a little warmer on sunny afternoons.
On the water in Cancún
Questions
When is the water warmest in Cancún?
August, at about 85°F (29°C).
Can you swim in Cancún all year?
Yes. The sea stays at 80°F or warmer even in February.
Do I need a wetsuit to snorkel in Cancún?
Not for warmth: the water stays above 77°F all year, though a thin top helps with sun on long trips.
