Swimming in Saint Lucia in september 2025 Sea temperature by city in september
Do you want to go to the beach in Saint Lucia 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 Saint Lucia by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in Saint Lucia in september 2025
Here, find the average sea temperature in Saint Lucia in september in several coastal cities.
86°F
min: 84°F / max: 87°F
86°F
min: 84°F / max: 88°F
Anse-La-Raye
86°F
min: 84°F / max: 88°F
Choiseul
86°F
min: 84°F / max: 88°F
Dennery
85°F
min: 84°F / max: 87°F
Gros Islet
86°F
min: 84°F / max: 87°F
Laborie
86°F
min: 84°F / max: 87°F
Micoud
85°F
min: 84°F / max: 88°F
Vieux Fort
86°F
min: 84°F / max: 88°F
Praslin Bay
85°F
min: 84°F / max: 88°F
Where should you go swimming in Saint Lucia in the month of september?
Swimming in Saint Lucia in september is ideal
In september in Saint Lucia swimming conditions are generally the same everywhere.
In september in Castries, Soufrière, Anse-La-Raye, Choiseul, Dennery, Gros Islet, Laborie, Micoud, Vieux Fort and Praslin Bay, swimming conditions are perfect! With water reaching a maximum of 87°F and an average of 86°F, going in the water (and staying there!) feels great.
Where to go swimming in Saint Lucia in september: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in september
Castries
| September | |||
| Average sea temperature | 86°F | ||
| Minimum sea temperature | 84°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 86°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 85°F | ||
| Precipitation | 6.2in | ||
| Number of days of precipitation | 9 jour(s) (28%) | ||
| Cloud cover | 42% | ||
| Our opinion | ideal swimming |
More information on swimming in Castries in september
Soufrière
| September | |||
| Average sea temperature | 86°F | ||
| Minimum sea temperature | 84°F | ||
| Maximum sea temperature | 88°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 86°F | ||
| Minimum outside temperature | 85°F | ||
| Precipitation | 6in | ||
| Number of days of precipitation | 9 jour(s) (30%) | ||
| Cloud cover | 38% | ||
| Our opinion | ideal swimming |
More information on swimming in Soufrière in september
Anse-La-Raye
| September | |||
| Average sea temperature | 86°F | ||
| Minimum sea temperature | 84°F | ||
| Maximum sea temperature | 88°F | ||
| Average outside temperature | 86°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 85°F | ||
| Precipitation | 6.2in | ||
| Number of days of precipitation | 9 jour(s) (28%) | ||
| Cloud cover | 42% | ||
| Our opinion | ideal swimming |
Choiseul
| September | |||
| Average sea temperature | 86°F | ||
| Minimum sea temperature | 84°F | ||
| Maximum sea temperature | 88°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 86°F | ||
| Minimum outside temperature | 85°F | ||
| Precipitation | 6in | ||
| Number of days of precipitation | 9 jour(s) (30%) | ||
| Cloud cover | 38% | ||
| Our opinion | ideal swimming |
Dennery
| September | |||
| Average sea temperature | 85°F | ||
| Minimum sea temperature | 84°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 86°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 85°F | ||
| Precipitation | 6.2in | ||
| Number of days of precipitation | 9 jour(s) (28%) | ||
| Cloud cover | 42% | ||
| Our opinion | ideal swimming |
List of coastal cities in Saint Lucia
| Castries in september | ideal swimming |
| Soufrière in september | ideal swimming |
| Anse-La-Raye in september | ideal swimming |
| Choiseul in september | ideal swimming |
| Dennery in september | ideal swimming |
| Gros Islet in september | ideal swimming |
| Laborie in september | ideal swimming |
| Micoud in september | ideal swimming |
| Vieux Fort in september | ideal swimming |
| Praslin Bay in september | ideal swimming |