The Croatia resorts with the warmest sea water temperature in September are Mlini, Plat and Cavtat.
Below you can see a list of all popular Croatia resorts and information about sea water temperature in September for the last two years.
| Resort Name | September 2026 | September 2025 | September 2024 |
|---|---|---|---|
| Mlini | 82.9°F | 80.0°F | 80.9°F |
| Plat | 82.9°F | 80.0°F | 80.9°F |
| Cavtat | 82.8°F | 80.0°F | 80.8°F |
| Dubrovnik | 82.2°F | 79.6°F | 80.7°F |
| Lastovo | 81.8°F | 79.8°F | 80.2°F |
| Novigrad | 81.4°F | 78.6°F | 79.6°F |
| Komiza | 81.3°F | 78.6°F | 79.0°F |
| Rovinj | 81.3°F | 78.8°F | 79.3°F |
| Porec | 81.3°F | 78.7°F | 79.5°F |
| Umag | 81.2°F | 78.6°F | 79.4°F |
| Vrsar | 81.1°F | 78.6°F | 79.4°F |
| Pula | 80.9°F | 78.4°F | 78.8°F |
| Hvar | 80.7°F | 78.4°F | 79.4°F |
| Tucepi | 80.6°F | 77.4°F | 78.7°F |
| Stari Grad | 80.6°F | 78.3°F | 79.5°F |
| Korcula | 80.5°F | 78.8°F | 79.7°F |
| Makarska | 80.5°F | 77.4°F | 78.6°F |
| Dugi Otok | 80.4°F | 78.3°F | 78.0°F |
| Split | 80.1°F | 77.3°F | 78.2°F |
| Trogir | 80.0°F | 77.3°F | 78.4°F |
| Solin | 80.0°F | 77.2°F | 78.2°F |
| Brela | 80.0°F | 76.8°F | 78.0°F |
| Baska Voda | 80.0°F | 76.8°F | 78.0°F |
| Supetar | 79.6°F | 77.1°F | 78.3°F |
| Istria | 79.6°F | 77.6°F | 77.7°F |
| Medulin | 79.4°F | 77.4°F | 77.4°F |
| Mali Losinj | 79.3°F | 77.5°F | 76.9°F |
| Klek | 79.3°F | 77.1°F | 79.0°F |
| Sibenik | 79.3°F | 76.4°F | 77.6°F |
| Skradin | 79.2°F | 76.5°F | 77.7°F |
| Brac | 79.2°F | 76.6°F | 77.9°F |
| Molat | 79.2°F | 77.8°F | 76.7°F |
| Omis | 79.2°F | 76.8°F | 77.9°F |
| Vodice | 78.6°F | 76.5°F | 77.6°F |
| Zadar | 78.5°F | 76.6°F | 76.4°F |
| Novalja | 78.3°F | 76.5°F | 75.7°F |
| Biograd na Moru | 77.9°F | 76.2°F | 77.0°F |
| Pag | 77.6°F | 76.2°F | 75.6°F |
| Rab | 77.4°F | 75.7°F | 75.0°F |
| Rijeka | 77.4°F | 74.8°F | 74.7°F |
| Lovran | 77.3°F | 75.2°F | 74.6°F |
| Kraljevica | 77.3°F | 74.2°F | 74.4°F |
| Labin | 77.3°F | 75.9°F | 75.1°F |
| Opatija | 77.3°F | 74.9°F | 74.7°F |
| Rabac | 77.1°F | 75.7°F | 75.0°F |
| Cres | 77.0°F | 75.9°F | 74.9°F |
| Crikvenica | 76.6°F | 73.7°F | 74.4°F |
| Krk | 76.4°F | 75.3°F | 74.4°F |
Please see following sea water temperature averages charts for the warmest Croatia 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.
