August · Mexico
Best time to visit Isla Mujeres in August Weather, crowds & prices
Weather in Isla Mujeres in August
Average temperature 29°C, 138 mm of rain, about 31 days with 6+ hours of sunshine and 83% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
August score
7.9/10
Ranked #6 of 12 months
- Avg temp
- 29°C
- Rainfall
- 138 mm
- Humidity
- 83%
- Days with 6h+ sun
- 31
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
August in Isla Mujeres scores 7.9/10 for beach and coastal travel - an above-average month (#6 of 12). Expect around 29°C, 138 mm of rain, and roughly 31 days with 6+ hours of sunshine this month.
Isla Mujeres lies off Cancún with a breezy beach, a turtle farm and calm Caribbean water.
August in Isla Mujeres — reliably good (6th best month)
Days in August average 29°C (84°F) and humidity near 83% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
138 mm of rain makes this a wet month here, though with about 31 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 7.9/10 on the same scale — 6th of 12 months, versus 9.6/10 for the best month here.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Expect mid-season pricing, and crowds are moderate.
If your dates are flexible, April is materially better in Isla Mujeres — 1.7 points higher on the same scale.
Frequently asked
- What is the weather like in Isla Mujeres in August?
- In August, Isla Mujeres averages 29°C, 138 mm of rain, and about 31 days with 6+ hours of sunshine. Its climate-comfort score is 7.9/10.
- Is August a good time to visit Isla Mujeres?
- August earns a 7.9/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Isla Mujeres in August?
- Expect about 138 mm of rain in August. Average humidity is 83% and there are about 31 days with 6+ hours of sunshine.
Curated in Isla Mujeres
Tickets & experiences
Things to do in Isla Mujeres
Isla Mujeres, Mexico. Live activities and tours from GetYourGuide, matched to this destination.