Swimming in Dominica in september 2025 Sea temperature by city in september
Do you want to go to the beach in Dominica in september 2025? Is it the right month to go for pleasant temperatures and staying in the water for a long time? The answer is on this page with the sea temperatures in september in Dominica by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in Dominica in september 2025
Here, find the average sea temperature in Dominica in september in several coastal cities.
85°F
min: 84°F / max: 87°F
Berekua
85°F
min: 84°F / max: 87°F
Marigot (Dominica)
86°F
min: 84°F / max: 87°F
Portsmouth
85°F
min: 83°F / max: 87°F
Rosalie
86°F
min: 83°F / max: 87°F
Saint-Joseph (Dominica)
86°F
min: 84°F / max: 87°F
Castle Bruce
86°F
min: 83°F / max: 87°F
Mahaut
86°F
min: 83°F / max: 87°F
Wesley
85°F
min: 84°F / max: 87°F
Where should you go swimming in Dominica in the month of september?
Swimming in Dominica in september is ideal
In september in Dominica swimming conditions are generally the same everywhere.
In september in Roseau, Berekua, Marigot (Dominica), Portsmouth, Rosalie, Saint-Joseph (Dominica), Castle Bruce, Mahaut and Wesley, swimming conditions are perfect! With water reaching a maximum of 87°F and an average of 85°F, going in the water (and staying there!) feels great.
Where to go swimming in Dominica in september: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in september
Roseau
| September | |||
| Average sea temperature | 85°F | ||
| Minimum sea temperature | 84°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 86°F | ||
| Minimum outside temperature | 85°F | ||
| Precipitation | 8.3in | ||
| Number of days of precipitation | 10 jour(s) (32%) | ||
| Cloud cover | 36% | ||
| Our opinion | ideal swimming |
More information on swimming in Roseau in september
Berekua
| September | |||
| Average sea temperature | 85°F | ||
| Minimum sea temperature | 84°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 90°F | ||
| Minimum outside temperature | 79°F | ||
| Precipitation | 7.2in | ||
| Number of days of precipitation | 9 jour(s) (28%) | ||
| Cloud cover | 36% | ||
| Our opinion | ideal swimming |
Marigot (Dominica)
| September | |||
| Average sea temperature | 86°F | ||
| Minimum sea temperature | 84°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 85°F | ||
| Minimum outside temperature | 83°F | ||
| Precipitation | 8.7in | ||
| Number of days of precipitation | 10 jour(s) (32%) | ||
| Cloud cover | 39% | ||
| Our opinion | ideal swimming |
Portsmouth
| September | |||
| Average sea temperature | 85°F | ||
| Minimum sea temperature | 83°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 86°F | ||
| Minimum outside temperature | 85°F | ||
| Precipitation | 8.1in | ||
| Number of days of precipitation | 9 jour(s) (30%) | ||
| Cloud cover | 38% | ||
| Our opinion | ideal swimming |
Rosalie
| September | |||
| Average sea temperature | 86°F | ||
| Minimum sea temperature | 83°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 90°F | ||
| Minimum outside temperature | 79°F | ||
| Precipitation | 7.2in | ||
| Number of days of precipitation | 9 jour(s) (28%) | ||
| Cloud cover | 36% | ||
| Our opinion | ideal swimming |
List of coastal cities in Dominica
| Roseau in september | ideal swimming |
| Berekua in september | ideal swimming |
| Marigot (Dominica) in september | ideal swimming |
| Portsmouth in september | ideal swimming |
| Rosalie in september | ideal swimming |
| Saint-Joseph (Dominica) in september | ideal swimming |
| Castle Bruce in september | ideal swimming |
| Mahaut in september | ideal swimming |
| Wesley in september | ideal swimming |