Roseau weather in August 2025

Expect daytime maximum temperatures of 88°F in Roseau, Dominica in August and very high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 20 days with some rainfall and typically 9.7 inches of rainfall in the month.

  • 88°F maximum daytime temperature in August in Roseau88
    88°F max day temperature
  • 8 hours of sunshine per day
  • 20 days with some rainfall in August in Roseau20
    20 days with some rainfall
  • 75°F minimum night-time temperature in August in Roseau75
    75°F min night temperature
  • 13 hours of daylight per day in August in Roseau13
    13 hours of daylight per day
  • Very high heat & humidity in August in RoseauVH
    Very High heat & humidity
  • 9.7 inches monthly rainfall in August in Roseau9.7
    9.7 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in Roseau11
    11+ (Extreme) UV index
  • 84°F sea temperature in August in Roseau84
    84°F 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.

Metric (°C)  |  Imperial (°F)

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How hot is it in Roseau in August?

Daytime temperatures usually reach 88°F in Roseau in August with very high heat and humidity, falling to 75°F at night.

How sunny is it in Roseau in August?

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

How warm is the sea around Roseau in August?

The average sea temperature around Roseau in August is 84°F.

Does it rain in Roseau in August?

There are usually 20 days with some rain in Roseau in August and the average monthly rainfall is 9.7 inches.

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

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

Roseau August sunrise & sunset times

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

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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