The San Marino resorts with the warmest sea water temperature in December are Domagnano, Mentegiardino and San Marino.
Below you can see a list of all popular San Marino resorts and information about sea water temperature in December for the last two years.
| Resort Name | December 2025 | December 2024 | December 2023 |
|---|---|---|---|
| Domagnano | 49.9°F | 51.9°F | 52.3°F |
| Mentegiardino | 49.9°F | 51.9°F | 52.3°F |
| San Marino | 49.9°F | 51.9°F | 52.3°F |
| Faetano | 49.9°F | 51.9°F | 52.3°F |
| Fiorentino | 49.9°F | 51.9°F | 52.3°F |
| Acquaviva | 49.9°F | 51.9°F | 52.3°F |
| Borgo Maggiore | 49.9°F | 51.9°F | 52.3°F |
| Chiesanuova | 49.9°F | 51.9°F | 52.3°F |
| Serravalle | 49.9°F | 51.9°F | 52.3°F |
Please see following sea water temperature averages charts for the warmest San Marino resorts in December.
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.
San Marino Resorts:
NAME
F°
| Acquaviva |  |
+40 |
| Borgo Maggiore | |
+40 |
| Chiesanuova | |
+40 |
| Domagnano | |
+40 |
| Faetano | |
+40 |
| Fiorentino | |
+40 |
| Mentegiardino | |
+40 |
| San Marino | |
+40 |
| Serravalle | |
+40 |
