In September warmest sea in Vietnam is usually observed in the following locations: Thanh Hoa, Cat Ba Island, Doc Let Beach.
Table below shows the average sea water temperature for marine resorts of Vietnam in September for the last three years.
| Place name | September 2026 | September 2025 | September 2024 |
|---|---|---|---|
| Thanh Hoa | 85.4°F | 86.0°F | 85.8°F |
| Cat Ba Island | 85.3°F | 85.7°F | 86.0°F |
| Doc Let Beach | 85.2°F | 85.4°F | 85.5°F |
| Da Nang | 85.1°F | 85.1°F | 86.2°F |
| Hoi An | 85.0°F | 85.0°F | 85.8°F |
| Ha Long | 85.0°F | 85.6°F | 85.9°F |
| Con Dao | 85.0°F | 84.0°F | 84.7°F |
| Hue | 84.8°F | 85.8°F | 86.4°F |
| Cam Ranh | 84.7°F | 84.9°F | 84.9°F |
| Tuan Chau | 84.7°F | 85.3°F | 85.7°F |
| Nha Trang | 84.7°F | 85.2°F | 85.1°F |
| Vinpearl | 84.5°F | 85.0°F | 85.0°F |
| Phu Quoc | 84.3°F | 84.0°F | 84.8°F |
| Vung Tau | 84.2°F | 83.6°F | 84.2°F |
| Ho Chi Minh | 83.9°F | 83.8°F | 84.1°F |
| Hai Phong | 83.8°F | 84.5°F | 84.9°F |
| Phan Rang | 83.6°F | 84.0°F | 83.8°F |
| Ke Ga | 83.5°F | 82.4°F | 82.7°F |
| Phan Thiet | 82.8°F | 82.1°F | 82.4°F |
| Mui Ne | 82.8°F | 82.1°F | 82.4°F |
Charts below show average sea water temperature for Vietnam resorts with the warmest sea in September.
You can also check other months of the year to see sea temperature of Vietnam resorts at that time.
Places in Vietnam:
Name
°F
