Swimming in the French Basque country in september 2025 Sea temperature by city in september
Do you want to go to the beach in the French Basque country 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 the French Basque country by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in the French Basque country in september 2025
Here, find the average sea temperature in the French Basque country in september in several coastal cities.
70°F
min: 66°F / max: 74°F
70°F
min: 66°F / max: 74°F
70°F
min: 66°F / max: 74°F
70°F
min: 66°F / max: 74°F
70°F
min: 66°F / max: 74°F
70°F
min: 66°F / max: 74°F
Boucau
70°F
min: 66°F / max: 74°F
Guethary
70°F
min: 66°F / max: 74°F
Where should you go swimming in the French Basque country in the month of september?
Swimming in the French Basque country in september is cool
In september in the French Basque country swimming conditions are generally the same everywhere.
Swimming in september in Bayonne, Biarritz, Bidart, Hendaye, Saint-Jean-de-Luz, Anglet, Boucau and Guethary is possible but the sea is generally cool. So though the sea temperature may sometimes reach 74°F, it can also go as low as 66°F. Note that the average is 70°F.
Where to go swimming in the French Basque country in september: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in september
Bayonne
| September | |||
| Average sea temperature | 70°F | ||
| Minimum sea temperature | 66°F | ||
| Maximum sea temperature | 74°F | ||
| Average outside temperature | 68°F | ||
| Maximum outside temperature | 74°F | ||
| Minimum outside temperature | 63°F | ||
| Precipitation | 3.5in | ||
| Number of days of precipitation | 5 jour(s) (16%) | ||
| Cloud cover | 32% | ||
| Our opinion | cool swimming |
More information on swimming in Bayonne in september
Biarritz
| September | |||
| Average sea temperature | 70°F | ||
| Minimum sea temperature | 66°F | ||
| Maximum sea temperature | 74°F | ||
| Average outside temperature | 68°F | ||
| Maximum outside temperature | 74°F | ||
| Minimum outside temperature | 63°F | ||
| Precipitation | 3.5in | ||
| Number of days of precipitation | 5 jour(s) (16%) | ||
| Cloud cover | 32% | ||
| Our opinion | cool swimming |
More information on swimming in Biarritz in september
Bidart
| September | |||
| Average sea temperature | 70°F | ||
| Minimum sea temperature | 66°F | ||
| Maximum sea temperature | 74°F | ||
| Average outside temperature | 68°F | ||
| Maximum outside temperature | 74°F | ||
| Minimum outside temperature | 63°F | ||
| Precipitation | 3.5in | ||
| Number of days of precipitation | 5 jour(s) (16%) | ||
| Cloud cover | 32% | ||
| Our opinion | cool swimming |
More information on swimming in Bidart in september
Hendaye
| September | |||
| Average sea temperature | 70°F | ||
| Minimum sea temperature | 66°F | ||
| Maximum sea temperature | 74°F | ||
| Average outside temperature | 67°F | ||
| Maximum outside temperature | 72°F | ||
| Minimum outside temperature | 63°F | ||
| Precipitation | 3.9in | ||
| Number of days of precipitation | 6 jour(s) (20%) | ||
| Cloud cover | 32% | ||
| Our opinion | cool swimming |
More information on swimming in Hendaye in september
Saint-Jean-de-Luz
| September | |||
| Average sea temperature | 70°F | ||
| Minimum sea temperature | 66°F | ||
| Maximum sea temperature | 74°F | ||
| Average outside temperature | 67°F | ||
| Maximum outside temperature | 72°F | ||
| Minimum outside temperature | 63°F | ||
| Precipitation | 3.9in | ||
| Number of days of precipitation | 6 jour(s) (20%) | ||
| Cloud cover | 32% | ||
| Our opinion | cool swimming |
More information on swimming in Saint-Jean-de-Luz in september
List of coastal cities in the French Basque country
| Bayonne in september | cool swimming |
| Biarritz in september | cool swimming |
| Bidart in september | cool swimming |
| Hendaye in september | cool swimming |
| Saint-Jean-de-Luz in september | cool swimming |
| Anglet in september | cool swimming |
| Boucau in september | cool swimming |
| Guethary in september | cool swimming |