In September warmest sea in Lazio is usually observed in the following locations: Fiuggi, Rome, Ostia.
Table below shows the average sea water temperature for marine resorts of Lazio in September for the last three years.
| Place name | September 2025 | September 2024 | September 2023 |
|---|---|---|---|
| Fiuggi | 77.4°F | 77.3°F | 75.7°F |
| Rome | 76.8°F | 77.1°F | 75.6°F |
| Ostia | 76.8°F | 77.0°F | 75.5°F |
| Fiumicino | 76.7°F | 76.7°F | 75.3°F |
| Roseto degli Abruzzi | 76.7°F | 77.1°F | 76.4°F |
| Pescara | 76.7°F | 77.6°F | 76.6°F |
| Francavilla al Mare | 76.7°F | 77.6°F | 76.4°F |
| Santa Marinella | 76.6°F | 76.7°F | 75.1°F |
| Silvi | 76.6°F | 77.5°F | 76.5°F |
| Montesilvano | 76.6°F | 77.5°F | 76.5°F |
| Civitavecchia | 76.5°F | 76.4°F | 75.0°F |
| Orbetello | 76.4°F | 76.1°F | 75.0°F |
| Porto Santo Stefano | 76.4°F | 76.3°F | 75.1°F |
| Marina di Grosseto | 75.9°F | 75.9°F | 74.6°F |
Charts below show average sea water temperature for Lazio resorts with the warmest sea in September.
You can also check other months of the year to see sea temperature of Lazio resorts at that time.
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