In September warmest sea in San Marino is usually observed in the following locations: Acquaviva, Borgo Maggiore, Serravalle.
Table below shows the average sea water temperature for marine resorts of San Marino in September for the last three years.
| Place name | September 2026 | September 2025 | September 2024 |
|---|---|---|---|
| Acquaviva | 79.4°F | 75.2°F | 75.5°F |
| Borgo Maggiore | 79.4°F | 75.2°F | 75.5°F |
| Serravalle | 79.4°F | 75.2°F | 75.5°F |
| Chiesanuova | 79.4°F | 75.2°F | 75.5°F |
| San Marino | 79.3°F | 75.1°F | 75.6°F |
| Domagnano | 79.3°F | 75.1°F | 75.6°F |
| Fiorentino | 79.3°F | 75.1°F | 75.6°F |
| Faetano | 79.3°F | 75.1°F | 75.6°F |
| Mentegiardino | 79.3°F | 75.1°F | 75.6°F |
Charts below show average sea water temperature for San Marino resorts with the warmest sea in September.
You can also check other months of the year to see sea temperature of San Marino resorts at that time.
Places in San Marino:
Name
°F
