Cancun weather in August
Cancun averages 31°C by day and 26°C at night in August, with the sea at 29°C and about 132 mm of rain in the month.
Day
31°C
Night
26°C
Sea
29°C
Rain
132 mm
Flight from London
10h
What August feels like
August is hot in Cancun: proper beach weather.
The sea is warm at 29°C: comfortable for long swims.
Expect some rainy spells: about 132 mm falls in the month.
That is 9°C warmer than an average August day in London.
Of the 56 sun destinations we track, Cancun is the #21 warmest in August.
Want it warmer in August?
These are hotter than Cancun this month for at most an hour and a half more flying:
Cancun weather by month
August is highlighted. Compare with July and September, or see the full year in Cancun.
| Month | Day | Night | Sea | Rain |
|---|---|---|---|---|
| January | 26°C | 22°C | 27°C | 82 mm |
| February | 27°C | 23°C | 27°C | 47 mm |
| March | 28°C | 23°C | 27°C | 37 mm |
| April | 29°C | 24°C | 27°C | 40 mm |
| May | 30°C | 25°C | 27°C | 85 mm |
| June | 30°C | 26°C | 28°C | 197 mm |
| July | 31°C | 26°C | 29°C | 97 mm |
| August | 31°C | 26°C | 29°C | 132 mm |
| September | 31°C | 25°C | 29°C | 180 mm |
| October | 29°C | 25°C | 29°C | 180 mm |
| November | 28°C | 23°C | 29°C | 109 mm |
| December | 27°C | 22°C | 28°C | 82 mm |
Cancun in August: quick answers
Is Cancun hot in August?
August is hot in Cancun: proper beach weather. Average highs are 31°C and lows 26°C.
Can you swim in Cancun in August?
The sea is warm at 29°C: comfortable for long swims.
Does it rain in Cancun in August?
Expect some rainy spells: about 132 mm falls in the month.
What is the warmest month in Cancun?
July, at an average high of 31°C. The coolest is January at 26°C.
How long is the flight to Cancun from the UK?
About 10h direct from London, estimated from the 7,940 km distance. Check your airline for exact times.
Still choosing? See where is hot in August for every destination ranked by temperature, sea and flight time.
How we measured this
Averages of every day in August from 2016 to 2025, from the Open-Meteo historical weather archive (ECMWF ERA5 reanalysis). Sea temperature is the 2023 to 2025 average from the Open-Meteo marine archive. Rain is the average monthly total. Reanalysis describes an area about 25 km across, so sheltered resorts can run a degree or two warmer. Flight time is a distance-based estimate from London Heathrow.
Planning Cancun in August?
Save the restaurants, beaches and views you find on TikTok and Instagram for Cancun straight to a map, then let Dream Trip turn them into a day-by-day plan.
