The Vietnam resorts with the warmest sea water temperature in August are Ha Long, Tuan Chau and Cat Ba Island.
Below you can see a list of all popular Vietnam resorts and information about sea water temperature in August for the last two years.
| Resort Name | August 2025 | August 2024 | August 2023 |
|---|---|---|---|
| Ha Long | 90.8°F | 91.5°F | 91.5°F |
| Tuan Chau | 90.8°F | 91.3°F | 91.4°F |
| Cat Ba Island | 90.8°F | 91.3°F | 91.3°F |
| Hue | 90.6°F | 91.8°F | 91.4°F |
| Thanh Hoa | 90.5°F | 91.8°F | 91.1°F |
| Hai Phong | 90.2°F | 90.0°F | 90.3°F |
| Da Nang | 89.9°F | 90.5°F | 90.3°F |
| Hoi An | 89.3°F | 89.7°F | 89.8°F |
| Phu Quoc | 89.0°F | 89.3°F | 88.7°F |
| Doc Let Beach | 88.9°F | 89.8°F | 89.8°F |
| Con Dao | 88.6°F | 89.7°F | 88.4°F |
| Nha Trang | 87.6°F | 87.9°F | 88.0°F |
| Cam Ranh | 87.5°F | 88.6°F | 87.9°F |
| Vinpearl | 87.3°F | 87.5°F | 87.6°F |
| Ho Chi Minh | 86.8°F | 88.4°F | 88.1°F |
| Vung Tau | 86.3°F | 88.4°F | 87.4°F |
| Phan Rang | 85.6°F | 86.4°F | 85.1°F |
| Ke Ga | 84.5°F | 87.3°F | 84.1°F |
| Phan Thiet | 83.9°F | 86.7°F | 83.1°F |
| Mui Ne | 83.8°F | 86.8°F | 82.9°F |
Please see following sea water temperature averages charts for the warmest Vietnam resorts in August.
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 |  |
+78 |
| Cat Ba Island | |
+72 |
| Da Lat | |
+72 |
| Da Nang |  |
+78 |
| Doc Let Beach | |
+80 |
| Ha Long | |
+72 |
| Ha Noi | |
+68 |
| Ho Chi Minh |  |
+92 |
| Mui Ne | |
+84 |
| Nha Trang | |
+82 |
| Phan Rang | |
+78 |
| Phan Thiet | |
+84 |
| Phu Quoc | |
+88 |
| Vinpearl | |
+82 |
| Vung Tau | |
+88 |
