Average sea water temperature in December:
+71.6°F
| Minimum sea water temperature in December: | 78.6°F |
| Maximum sea water temperature in December: | 64.9°F |
Daily sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 71.9°F. The highest and lowest sea temperatures during the month were 73.0°F and 69.8°F.
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| Cat Ba Island |
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| Cat Ba Island |
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| Cat Ba Island |
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| Cat Ba Island |
Monthly sea water temperature in Cat Ba Island, °F
Which Vietnam resorts have warmest sea in December?
| Place name | December 2025 | December 2024 |
|---|---|---|
| Phu Quoc | 83.1°F | 83.8°F |
| Ho Chi Minh | 81.4°F | 81.5°F |
| Vung Tau | 81.4°F | 81.3°F |
| Con Dao | 80.7°F | 80.1°F |
| Ke Ga | 80.5°F | 79.9°F |
| Phan Thiet | 80.3°F | 79.6°F |
| Mui Ne | 80.3°F | 79.5°F |
| Phan Rang | 78.8°F | 78.4°F |
| Cam Ranh | 78.7°F | 78.0°F |
| Nha Trang | 78.6°F | 78.0°F |
| Vinpearl | 78.6°F | 78.0°F |
| Doc Let Beach | 78.6°F | 78.1°F |
| Hoi An | 75.9°F | 76.6°F |
| Da Nang | 75.7°F | 76.6°F |
| Hue | 75.3°F | 76.1°F |
| Thanh Hoa | 72.6°F | 71.7°F |
| Cat Ba Island | 71.9°F | 70.9°F |
| Ha Long | 71.1°F | 70.2°F |
| Tuan Chau | 70.7°F | 70.1°F |
| Hai Phong | 69.6°F | 69.5°F |
Best time for vacation in Cat Ba Island
Cat Ba Island on a weather map
Places in Vietnam:
Name
°F
24 Hours Forecast
Cat Ba Island
Local time: 08:25
December 19, friday
0900
68°F
SW
9 mph
9 mph
1200
72°F
W
9 mph
9 mph
1500
72°F
W
9 mph
9 mph
1800
68°F
W
8 mph
8 mph
2100
68°F
W
8 mph
8 mph
December 20, saturday
0000
68°F
W
7 mph
7 mph
0300
66°F
SW
7 mph
7 mph
0600
68°F
SW
8 mph
8 mph
