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Roseau Weather in August
Roseau in August sees high temperatures, with highs around 29°C (84°F) and overnight lows of 26°C (79°F). Rainfall is fairly high at around 126 mm (5 in) on average, so pack waterproofs just in case.
Rainfall in Roseau in August
Typically around 21 days of rainfall are expected, averaging 126 mm (5 in) for the month. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.
Temperature in Roseau in August
In August, expect high temperatures in Roseau, with highs of 29°C (84°F) and lows of 26°C (79°F) at night. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With lows around 26°C (79°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in Roseau in August
The days are predominantly sunny, with an estimated total of around 240 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.August in Roseau has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Roseau Temperature in August
Min Temperature
26°C (79°F)
Max Temperature
29°C (84°F)
Chance of Rain
68%
Precipitation
126 mm (5 in)
Rainy days
21 days
Humidity
71% *
Sunshine
240 hours *
Percentage Sunshine
*
* Data from: Douglas-Charles Airport, Dominica (28 KM, 17 Miles).
Roseau Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Roseau - and find the best time to visit.
Daily Historical Temperatures
42-year average (1976-2025)
Based on our historical records, temperatures in Roseau typically stay consistent throughout August, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in August
Historical weather records for Roseau in August
Browse day-by-day weather records for Roseau spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Roseau historical weather extremes in August
The extremes listed below come from historical weather data collected in Roseau from 2003 through 2026.
- The warmest day in August was on August 27, 2023, with a maximum of 35°C (95°F).
- The lowest daytime temperature in August was 28°C (82°F), recorded on August 17, 2007.
- Roseau registered its coldest August night on August 13, 2023, with temperatures dropping to 8°C (46°F).
Best Places in Dominica in August
Find out more about the weather in Dominica and which places have the best travel conditions in this month. See all of Dominica in August →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Roseau in August
Warm temperatures in August make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in Roseau in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
-
Swimming9/10 -
Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Roseau 3-Day Forecast
More climate data for Roseau
Temperature Rainfall Sunshine Humidity
See the full Roseau climate overview or explore weather in Dominica.
Popular in August
Where to go in August - average daytime high across popular destinations.
Portsmouth
29°C (84°F) Castle Bruce
29°C (84°F) Scotts Head Village29°C (84°F) Salisbury29°C (84°F) Marigot29°C (84°F) Calibishie29°C (84°F) Roseau29°C (84°F) Pont Cassé29°C (84°F) Bucket list
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