In September warmest sea in French Riviera is usually observed in the following locations: La Londe les Maures, Toulon, La Seyne sur Mer.
Table below shows the average sea water temperature for marine resorts of French Riviera in September for the last three years.
| Place name | September 2026 | September 2025 | September 2024 |
|---|---|---|---|
| La Londe les Maures | 77.0°F | 72.6°F | 74.9°F |
| Toulon | 75.5°F | 71.2°F | 74.0°F |
| La Seyne sur Mer | 75.3°F | 71.1°F | 73.9°F |
| Sanary-sur-Mer | 75.3°F | 71.0°F | 73.8°F |
| Bandol | 75.3°F | 70.9°F | 73.9°F |
| Saint Syr Sur Mer | 74.9°F | 70.8°F | 74.0°F |
| La Ciotat | 74.7°F | 70.8°F | 74.0°F |
| Cassis | 74.4°F | 70.7°F | 73.8°F |
| Le Grau Du Roi | 74.0°F | 70.4°F | 70.7°F |
| Montpellier | 73.7°F | 70.0°F | 70.2°F |
| Palavas les Flots | 73.6°F | 70.0°F | 70.1°F |
| Marseilles | 73.2°F | 70.5°F | 73.1°F |
| Frontignan | 73.1°F | 70.2°F | 69.9°F |
| Avignon | 72.8°F | 70.3°F | 71.0°F |
| Narbonne | 72.6°F | 69.6°F | 69.3°F |
| Beziers | 71.2°F | 69.2°F | 69.3°F |
Charts below show average sea water temperature for French Riviera resorts with the warmest sea in September.
You can also check other months of the year to see sea temperature of French Riviera resorts at that time.
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