Monthly climate guide

Roseau weather in August

Expect hot weather in Roseau in August: afternoons reach about 29°C (83°F), while nights drop to around 27°C (81°F). Around 178 mm of rain falls over the month (very wet), and skies are a mix of sun and cloud. Daytime highs are about the same as July and about the same as September.

What stands out in August

Only one month is warmer in Roseau than August.
This is rainy-season territory in Roseau: short, heavy downpours are typical.
There's little difference between day and night (around 1°C).
Humidity near 81% makes 29°C feel stickier than it sounds.

It's usually the wettest month of the year.

Avg high

29°C

83°F

Avg low

27°C

81°F

Rainfall

178 mm

very wet

Humidity

81%

relative

Sky

51%

cloud · a mix of sun and cloud

Live Roseau forecast Where else to go in August

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Roseau weather by month

Low → high °C Rain (mm)

Show the monthly averages as a table

Average monthly climate in Roseau
Month	Avg high	Avg low	Rain	Humidity	Cloud cover
January	27°C / 80°F	25°C / 77°F	54 mm	77%	39%
February	26°C / 80°F	25°C / 76°F	38 mm	76%	36%
March	27°C / 80°F	25°C / 77°F	50 mm	77%	44%
April	27°C / 81°F	26°C / 78°F	83 mm	77%	54%
May	28°C / 82°F	26°C / 79°F	113 mm	79%	61%
June	28°C / 83°F	27°C / 80°F	123 mm	79%	64%
July	28°C / 83°F	27°C / 81°F	141 mm	80%	54%
August	29°C / 83°F	27°C / 81°F	178 mm	81%	51%
September	29°C / 84°F	27°C / 81°F	171 mm	80%	55%
October	29°C / 83°F	27°C / 81°F	157 mm	80%	55%
November	28°C / 82°F	27°C / 80°F	158 mm	80%	50%
December	27°C / 81°F	26°C / 78°F	98 mm	78%	42%

What to pack for August

Light, breathable clothing (cotton or linen)
A sun hat and high-SPF sunscreen
A refillable water bottle
A compact umbrella or packable rain jacket
Water-resistant shoes
Quick-dry fabrics — it feels stickier than the temperature suggests

Full season-by-season packing guide →

Is August a good time to visit Roseau?

Compare the months in the chart above to find your ideal window.

Best time to visit Roseau →

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Roseau weather in August. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/dominica/roseau/august

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Roseau in August: quick answers

Is August a good time to visit Roseau?

August is one of the wetter months in Roseau, with about 178 mm of rain. You can still go: pack a rain jacket and keep plans flexible.

How warm is Roseau in August?

Average highs are about 29°C (83°F) and average lows about 27°C (81°F), based on 10 years of daily data.

Does it rain a lot in Roseau in August?

Roseau typically gets around 178 mm of rain in August — very wet. It's usually the wettest month of the year.

Figures are long-term averages for the area around Roseau (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.