The Romania resorts with the warmest sea water temperature in September are Mangalia, Eforie Nord and Mamaia.
Below you can see a list of all popular Romania resorts and information about sea water temperature in September for the last two years.
| Resort Name | September 2025 | September 2024 | September 2023 |
|---|---|---|---|
| Mangalia | 76.0°F | 77.1°F | 78.0°F |
| Eforie Nord | 75.8°F | 77.2°F | 78.0°F |
| Mamaia | 74.5°F | 76.1°F | 76.8°F |
| Konstanta | 74.4°F | 76.1°F | 76.7°F |
Please see following sea water temperature averages charts for the warmest Romania 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.
Romania Resorts:
NAME
F°
| Baile Olanesti |  |
+46 |
| Baile Tusnad |  |
+36 |
| Brasov | |
+40 |
| Bucharest | |
+50 |
| Cluj Napoca | |
+40 |
| Eforie Nord | |
+54 |
| Galati | |
+50 |
| Konstanta | |
+54 |
| Lasi | |
+46 |
| Mamaia | |
+54 |
| Mangalia | |
+56 |
| Poiana Brasov | |
+40 |
| Sinaia | |
+38 |
| Slanic Moldova |  |
+46 |
| Sovata | |
+40 |
