Swimming on the Île de Ré in september 2025 Sea temperature by city in september
Do you want to go to the beach on the Île de Ré 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 on the Île de Ré by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature on the Île de Ré in september 2025
Here, find the average sea temperature on the Île de Ré in september in several coastal cities.
67°F
min: 64°F / max: 70°F
67°F
min: 64°F / max: 70°F
67°F
min: 64°F / max: 70°F
Where should you go swimming on the Île de Ré in the month of september?
Swimming on the Île de Ré in september is cool
In september on the Île de Ré swimming conditions are generally the same everywhere.
Swimming in september in Saint-Martin-de-Re, Ars-en-Re and Sainte-Marie-de-Re is possible but the sea is generally cool. So though the sea temperature may sometimes reach 70°F, it can also go as low as 64°F. Note that the average is 67°F.
Where to go swimming on the Île de Ré in september: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in september
Saint-Martin-de-Re
| September | |||
| Average sea temperature | 67°F | ||
| Minimum sea temperature | 64°F | ||
| Maximum sea temperature | 70°F | ||
| Average outside temperature | 67°F | ||
| Maximum outside temperature | 74°F | ||
| Minimum outside temperature | 61°F | ||
| Precipitation | 2.6in | ||
| Number of days of precipitation | 4 jour(s) (15%) | ||
| Cloud cover | 28% | ||
| Our opinion | cool swimming |
More information on swimming in Saint-Martin-de-Re in september
Ars-en-Re
| September | |||
| Average sea temperature | 67°F | ||
| Minimum sea temperature | 64°F | ||
| Maximum sea temperature | 70°F | ||
| Average outside temperature | 67°F | ||
| Maximum outside temperature | 70°F | ||
| Minimum outside temperature | 65°F | ||
| Precipitation | 2.8in | ||
| Number of days of precipitation | 4 jour(s) (15%) | ||
| Cloud cover | 29% | ||
| Our opinion | cool swimming |
More information on swimming in Ars-en-Re in september
Sainte-Marie-de-Re
| September | |||
| Average sea temperature | 67°F | ||
| Minimum sea temperature | 64°F | ||
| Maximum sea temperature | 70°F | ||
| Average outside temperature | 67°F | ||
| Maximum outside temperature | 74°F | ||
| Minimum outside temperature | 61°F | ||
| Precipitation | 2.6in | ||
| Number of days of precipitation | 4 jour(s) (15%) | ||
| Cloud cover | 28% | ||
| Our opinion | cool swimming |
More information on swimming in Sainte-Marie-de-Re in september
List of coastal cities on the Île de Ré
| Saint-Martin-de-Re in september | cool swimming |
| Ars-en-Re in september | cool swimming |
| Sainte-Marie-de-Re in september | cool swimming |