Dominica weather in August 2025

Expect 31°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Dominica in August. Check more long-term weather averages for Dominica in August before you book your next holiday to Dominica in 2025/2026.

  • 31°C maximum daytime temperature in August in Dominica (Roseau)31
    31°C max day temperature
  • 8 hours of sunshine per day
  • 20 days with some rainfall in August in Dominica (Roseau)20
    20 days with some rainfall
  • 24°C minimum night-time temperature in August in Dominica (Roseau)24
    24°C min night temperature
  • 13 hours of daylight per day in August in Dominica (Roseau)13
    13 hours of daylight per day
  • Very high heat & humidity in August in Dominica (Roseau)VH
    Very High heat & humidity
  • 246 mm monthly rainfall in August in Dominica (Roseau)246
    246 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in Dominica (Roseau)11
    11+ (Extreme) UV index
  • 29°C sea temperature in August in Dominica (Roseau)29
    29°C sea temperature

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The August weather guide for Dominica (Roseau) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Top Dominica destinations

Below are average maximum temperatures at popular countries, regions and places in Dominica in August. Select a holiday destination to see more weather parameters.

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Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Dominica in August?

Daytime temperatures usually reach 31°C in Roseau, Dominica in August with very high heat and humidity, falling to 24°C at night.

How sunny is it in Dominica in August?

There are normally 8 hours of bright sunshine each day in Roseau, Dominica in August - that's 63% of daylight hours.

How warm is the sea around Dominica in August?

The average sea temperature around Roseau, Dominica in August is 29°C.

Does it rain in Dominica in August?

There are usually 20 days with some rain in Roseau, Dominica in August and the average monthly rainfall is 246mm.

What is the chance of a hurricane in Dominica in August?

On average less than 1 day in August in Roseau, Dominica is likely to be affected by the passage of one or more tropical storms.

Dominica August sunrise & sunset times

Browse the sunrise and sunset times for Dominica in August 2025. Select a month to view Dominica sunrise and sunset times for the next 12 months. The Dominica sunrise and sunset times shown below are for Roseau.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:48 18:36
Saturday, 16th August 2025 05:51 18:28
Sunday, 31st August 2025 05:53 18:18

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