Mexico
Cancún in August: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Cancún in August is climatically mixed. The average daily high is around 31 °C, and the sea is about 29 °C. With about 21 rainy days it is very wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
52/100 · #12
Warmth
#1
Dryness
#11
Sun
#4
Sea warmth
#2
Published best categories: none
Cancún · AugustPhoto: Luka Peternel · CC BY-SA 4.0Climate facts
- Average high
- 31 °C
- Average low
- 27 °C
- Sea
- 29 °C
- Rainy days (est.)
- 21 rainy days (est.)
- Sun (est.)
- 8 h/day
- Humidity
- 80 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| July | 30 | 26 | 18 | 91 | 8.2 | 80 | 2.0 | 29 | 56 |
| August (selected) | 31 | 27 | 21 | 120 | 7.9 | 80 | 1.9 | 29 | 52 |
| September | 30 | 27 | 24 | 175 | 6.9 | 82 | 1.9 | 29 | 53 |
How do the previous and next months compare?
Baseline: August (52/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| July | +4 | -0.3 °C | -0.2 °C | -3.1 | -29.3 mm | +0.3 h | +0.3 % | ±0 m/s | -0.4 °C |
| September | +1 | -0.6 °C | -0.2 °C | +2.5 | +54.5 mm | -1 h | +2.3 % | ±0 m/s | +0.1 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Cancún in August?
The average daily high is around 31 °C, with an average daily low of about 27 °C.
Can you swim in Cancún in August?
The sea is about 29 °C (very warm).
Does it rain a lot in Cancún in August?
The curated estimate is about 21 rainy days per month, not a directly measured long-term average. Total precipitation averages around 120 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Cancún?
By the climate score, January, February, March and April are the strongest months for Cancún. For a beach trip: January, February, March and April. August is not among them.