August · Dominica
Best time to visit Roseau in August Weather, crowds & prices
Weather in Roseau in August
Average temperature 29°C, 138 mm of rain, about 30 days with 6+ hours of sunshine and 81% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
August score
4.9/10
Ranked #8 of 12 months
- Avg temp
- 29°C
- Rainfall
- 138 mm
- Humidity
- 81%
- Days with 6h+ sun
- 30
- Crowd Density
- Moderate Crowds
- Average Expenses
- $ · Budget Friendly ($)
August in Roseau scores 4.9/10 for nature and wildlife travel - ranked #8 of 12. Expect around 29°C, 138 mm of rain, and roughly 30 days with 6+ hours of sunshine this month.
Roseau is Dominica's small capital, squeezed between the sea and steep rainforest mountains.
August in Roseau — the hardest end of the year
Days in August average 29°C (84°F) and humidity near 81% — 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 30 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 4.9/10 on the same scale — 8th of 12 months, versus 7.3/10 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, footwear you can get muddy.
Expect low-season pricing, and crowds are moderate.
If your dates are flexible, February is materially better in Roseau — 2.4 points higher on the same scale.
Frequently asked
- What is the weather like in Roseau in August?
- In August, Roseau averages 29°C, 138 mm of rain, and about 30 days with 6+ hours of sunshine. Its climate-comfort score is 4.9/10.
- Is August a good time to visit Roseau?
- August earns a 4.9/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Roseau in August?
- Expect about 138 mm of rain in August. Average humidity is 81% and there are about 30 days with 6+ hours of sunshine.
Curated in Roseau
Tickets & experiences
Things to do in Roseau
Roseau, Dominica. Live activities and tours from GetYourGuide, matched to this destination.