The Vietnam resorts with the warmest sea water temperature at this moment are Cat Ba Island, Thanh Hoa and Ha Long.
Below you can see a list of all popular Vietnam resorts and information about current sea water temperature and averages for current and next months.
| Resort Name | Current Sea Water Temperature |
September 2025 | October 2025 |
|---|---|---|---|
| Cat Ba Island | 90.4°F | 89.7°F | 86.6°F |
| Thanh Hoa | 90.0°F | 89.9°F | 86.9°F |
| Ha Long | 89.2°F | 89.6°F | 86.4°F |
| Phan Rang | 89.2°F | 87.8°F | 86.9°F |
| Cam Ranh | 89.2°F | 88.8°F | 87.5°F |
| Nha Trang | 88.8°F | 89.1°F | 87.2°F |
| Con Dao | 88.8°F | 87.7°F | 88.7°F |
| Ke Ga | 88.8°F | 86.0°F | 87.9°F |
| Doc Let Beach | 88.8°F | 89.4°F | 88.0°F |
| Phan Thiet | 88.6°F | 85.7°F | 87.3°F |
| Vung Tau | 88.6°F | 87.3°F | 88.2°F |
| Mui Ne | 88.6°F | 85.7°F | 87.3°F |
| Vinpearl | 88.6°F | 88.9°F | 87.0°F |
| Hue | 88.4°F | 89.8°F | 87.4°F |
| Da Nang | 88.4°F | 88.9°F | 87.0°F |
| Tuan Chau | 88.4°F | 89.3°F | 86.1°F |
| Hoi An | 88.2°F | 88.9°F | 86.7°F |
| Ho Chi Minh | 88.0°F | 87.5°F | 87.5°F |
| Phu Quoc | 87.4°F | 87.7°F | 88.4°F |
| Hai Phong | 85.8°F | 88.3°F | 84.5°F |
Please see following sea water temperature averages charts for the warmest Vietnam resorts for more details.
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.
Vietnam Resorts:
NAME
F°
| Cam Ranh |  |
+82 |
| Da Lat |  |
+62 |
| Da Nang | |
+80 |
| Doc Let Beach | |
+80 |
| Ha Long | |
+82 |
| Ha Noi | |
+82 |
| Ho Chi Minh | |
+80 |
| Hoi An | |
+80 |
| Mui Ne | |
+78 |
| Nha Trang | |
+80 |
| Phan Rang | |
+82 |
| Phan Thiet | |
+78 |
| Phu Quoc | |
+82 |
| Vinpearl | |
+80 |
| Vung Tau | |
+78 |
