30 diving destinations have the right September conditions — typically 25–31°C with sea temperatures of 26–30°C. Which is best depends on where you start from: the ranking below is computed in your browser, for your own location and preferences, and matches the live map exactly.
Open this on the live map →| Destination | °C | Sea | Rain d | Price | Safety |
|---|---|---|---|---|---|
| Basse-Terre, GP | 28° | 29° | 199 | € | very safe |
| Charlotte Amalie, VI | 28° | 29° | 130 | €€ | — |
| Fort-de-France, MQ | 28° | 29° | 210 | € | very safe |
| George Town, MY | 27° | 30° | 255 | € | safe |
| Grand-Bourg, GP | 28° | 29° | 181 | € | very safe |
| Honolulu, US | 27° | 27° | 80 | €€ | safe |
| Hurghada, EG | 28° | 28° | 0 | € | some risk |
| Key West, US | 28° | 30° | 144 | €€ | safe |
| Ko Samui, TH | 28° | 29° | 127 | € | safe |
| Kolonia, FM | 27° | 30° | 255 | €€ | safe |
| Kota Kinabalu, MY | 28° | 30° | 255 | € | safe |
| Kralendijk, BQ | 30° | 29° | 37 | € | — |
| Lahad Datu, MY | 27° | 30° | 146 | € | safe |
| Le Gosier, GP | 28° | 29° | 173 | € | very safe |
| Lower Prince’s Quarter, SX | 28° | 29° | 130 | €€ | safe |
| Makadi Bay, EG | 29° | 28° | 0 | € | some risk |
| Mamoudzou, YT | 25° | 26° | 29 | € | very safe |
| Marsa Alam, EG | 29° | 29° | 0 | € | some risk |
| Naha, JP | 28° | 28° | 197 | € | safe |
| Nha Trang, VN | 28° | 29° | 146 | € | safe |
| Noord, AW | 29° | 29° | 42 | €€ | safe |
| Phuket, TH | 27° | 29° | 255 | € | safe |
| Protaras, CY | 25° | 27° | 4 | € | safe |
| San Jose Village, MP | 28° | 30° | 255 | € | — |
| Sharm el-Sheikh, EG | 31° | 28° | 0 | € | some risk |
| Singapore, SG | 27° | 29° | 161 | € | safe |
| Sunrise, US | 28° | 29° | 208 | €€ | safe |
| Tamuning-Tumon-Harmon Village, GU | 27° | 29° | 255 | € | safe |
| Weno, FM | 28° | 30° | 255 | €€ | safe |
| Willemstad, CW | 29° | 29° | 35 | €€ | safe |
Listed alphabetically: destinations whose September climate, safety and viability pass Travelia's bar for diving trips. The Travelia Score isn't shown here because it isn't a fixed rating — it's computed live for your location and preferences. With JavaScript on, this table becomes your personal ranking (identical to the map's numbers); with it off, the facts stand on their own.