The France resorts with the warmest sea water temperature in September are Portivecju, Bastia and Aiacciu.
Below you can see a list of all popular France resorts and information about sea water temperature in September for the last two years.
| Resort Name | September 2025 | September 2024 | September 2023 |
|---|---|---|---|
| Portivecju | 79.3°F | 79.6°F | 77.8°F |
| Bastia | 78.9°F | 80.1°F | 78.3°F |
| Aiacciu | 78.8°F | 77.3°F | 76.6°F |
| Calvi | 78.6°F | 77.4°F | 76.9°F |
| Bunifaziu | 78.5°F | 78.1°F | 77.5°F |
| Corsica | 78.5°F | 77.3°F | 76.4°F |
| Roquebrune Cap Martin | 78.3°F | 78.7°F | 77.9°F |
| Saint Jean Cap Ferrat | 78.3°F | 78.5°F | 77.8°F |
| Menton | 78.3°F | 78.6°F | 77.8°F |
| Propriano | 78.2°F | 77.3°F | 76.3°F |
| Nice | 78.1°F | 78.3°F | 77.6°F |
| Saint Laurent du Var | 77.9°F | 78.1°F | 77.5°F |
| Cagnes sur Mer | 77.8°F | 77.9°F | 77.5°F |
| Antibes | 77.8°F | 78.2°F | 77.6°F |
| Juan les Pins | 77.8°F | 78.2°F | 77.6°F |
| Golfe Juan | 77.7°F | 78.2°F | 77.6°F |
| Cannes | 77.6°F | 78.4°F | 77.6°F |
| Theoule Sur Mer | 77.5°F | 78.5°F | 77.6°F |
| Mandelieu la Napoule | 77.5°F | 78.5°F | 77.6°F |
| Frejus | 77.0°F | 78.2°F | 77.0°F |
| Saint-Tropez | 76.6°F | 78.1°F | 76.9°F |
| Sainte Maxime | 76.6°F | 78.1°F | 76.8°F |
| Cavalaire sur Mer | 76.5°F | 78.0°F | 76.9°F |
| Le Lavandou | 75.9°F | 77.8°F | 76.9°F |
| La Londe les Maures | 75.1°F | 77.7°F | 76.8°F |
| Toulon | 73.6°F | 76.6°F | 76.2°F |
| La Seyne sur Mer | 73.4°F | 76.5°F | 76.2°F |
| Perpignan | 73.4°F | 72.4°F | 75.4°F |
| Sanary-sur-Mer | 73.3°F | 76.5°F | 76.3°F |
| Bandol | 73.2°F | 76.5°F | 76.4°F |
| Saint Syr Sur Mer | 73.1°F | 76.6°F | 76.4°F |
| La Ciotat | 73.1°F | 76.7°F | 76.6°F |
| Cassis | 73.0°F | 76.5°F | 76.6°F |
| Biarritz | 73.0°F | 71.6°F | 75.5°F |
| Marseilles | 72.8°F | 75.7°F | 76.5°F |
| Le Grau Du Roi | 72.7°F | 72.9°F | 75.9°F |
| Avignon | 72.5°F | 73.3°F | 75.7°F |
| Frontignan | 72.4°F | 72.1°F | 74.7°F |
| Palavas les Flots | 72.2°F | 72.3°F | 75.1°F |
| Montpellier | 72.2°F | 72.4°F | 75.5°F |
| Narbonne | 71.8°F | 71.5°F | 74.7°F |
| Beziers | 71.3°F | 71.4°F | 74.4°F |
| Arcachon | 71.2°F | 69.2°F | 74.2°F |
| Bordeaux | 71.0°F | 69.9°F | 73.8°F |
| Avoriaz | 70.3°F | 70.8°F | 73.8°F |
| Chamonix | 70.1°F | 70.0°F | 72.9°F |
| Evian-les-Bains | 70.1°F | 70.4°F | 73.3°F |
| La Rochelle | 69.2°F | 67.1°F | 73.5°F |
| Megeve | 69.0°F | 69.4°F | 72.7°F |
| Annecy | 68.7°F | 69.1°F | 72.4°F |
| Etretat | 67.0°F | 66.8°F | 69.0°F |
| Saint Malo | 66.9°F | 66.6°F | 69.0°F |
| Deauville | 66.7°F | 66.9°F | 69.7°F |
| Le Havre | 66.6°F | 66.9°F | 69.8°F |
| Rennes | 66.6°F | 66.4°F | 68.5°F |
Please see following sea water temperature averages charts for the warmest France resorts in September.
You can also get the same information for the every other month of the year when the average sea water temperature is greater then 70°F.
France Resorts:
NAME
F°
| Antibes |  |
+48 |
| Arcachon |  |
+50 |
| Biarritz |  |
+50 |
| Bordeaux | |
+44 |
| Cannes | |
+46 |
| Corsica | |
+52 |
| Etretat | |
+44 |
| Marseilles | |
+46 |
| Menton | |
+50 |
| Montpellier |  |
+46 |
| Nice | |
+44 |
| Paris | |
+36 |
| Saint-Tropez | |
+44 |
| Toulon | |
+46 |
| Toulouse | |
+42 |
