Sea weather in Cat Ba island in Vietnam All the beach weather in Cat Ba island
All the essential weather information for enjoying the beach in Cat Ba island in Vietnam, for swimming, tanning or water sports! Our sea weather data is reliable, easy to read and updated every day.
Weather: When should you go to the beach in Cat Ba island over the next 7 days?
Discover the best moment to go to the beach in Cat Ba island in Vietnam this week to enjoy the best weather and calmest sea possible. Our opinion is based on reliable sea weather forecasts in Cat Ba island. You can see full forecasts by clicking on the day you want to see in the table below.
| Date | Outside temp. | Max wind | Our opinion | Details |
|---|---|---|---|---|
| Friday 5 December 2025 | 67°F to 70°F | 8.1mph | discouraged | all the sea weather |
| Saturday 6 December 2025 | 67°F to 70°F | 7.5mph | recommended | all the sea weather |
| Sunday 7 December 2025 | 67°F to 70°F | 6.2mph | discouraged | all the sea weather |
| Monday 8 December 2025 | 65°F to 76°F | 8.1mph | recommended | all the sea weather |
| Tuesday 9 December 2025 | 63°F to 72°F | 6.2mph | recommended | all the sea weather |
| Wednesday 10 December 2025 | 65°F to 70°F | 12.4mph | recommended | all the sea weather |
| Thursday 11 December 2025 | 65°F to 68°F | 6.2mph | recommended | all the sea weather |
Sea Weather: Your daily and hourly sea weather in Cat Ba island
Sea weather on Friday 5 December 2025
On Friday 5 December 2025, the sun will rise at 06:14 and will set at 17:10 on the beach(es) of Cat Ba island. The outside temperature will be a high of 70°F t and a low of 67°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 16.8mph km/h (with gusts up to 23mph). Wave height will be up to 3.3ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition |  | | |  |  | |  | |
| Outside temperature | 20°C (68°F) | 20°C (68°F) | 19°C (67°F) | 20°C (67°F) | 21°C (69°F) | 21°C (69°F) | 20°C (67°F) | 20°C (67°F) |
| Perceived temperature | 20°C (68°F) | 20°C (68°F) | 19°C (67°F) | 20°C (67°F) | 21°C (69°F) | 21°C (69°F) | 20°C (67°F) | 20°C (67°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 76% | 86% | 85% | 82% | 75% | 73% | 76% | 77% |
| Barometric pressure | 1020 hPa | 1019 hPa | 1021 hPa | 1023 hPa | 1021 hPa | 1018 hPa | 1019 hPa | 1020 hPa |
| Cloud cover | 100% | 100% | 100% | 100% | 79% | 100% | 82% | 52% |
| Heat index | 20°C (68°F) | 20°C (68°F) | 19°C (67°F) | 20°C (67°F) | 21°C (69°F) | 21°C (69°F) | 20°C (67°F) | 20°C (67°F) |
| Dew point | 16°C (60°F) | 18°C (64°F) | 17°C (62°F) | 16°C (62°F) | 16°C (61°F) | 16°C (60°F) | 15°C (59°F) | 16°C (60°F) |
| Wind | ||||||||
| Speed | 19km/h (12mph) | 27km/h (17mph) | 25km/h (15mph) | 25km/h (16mph) | 22km/h (13mph) | 19km/h (12mph) | 19km/h (12mph) | 13km/h (8mph) |
| Gusts | 28km/h (18mph) | 37km/h (23mph) | 35km/h (21mph) | 34km/h (21mph) | 28km/h (18mph) | 26km/h (16mph) | 29km/h (18mph) | 19km/h (12mph) |
| Direction | 55° NE | 59° ENE | 52° NE | 52° NE | 55° NE | 71° ENE | 68° ENE | 50° NE |
| Wind chill | 20°C (68°F) | 20°C (68°F) | 19°C (67°F) | 20°C (67°F) | 21°C (69°F) | 21°C (69°F) | 20°C (67°F) | 20°C (67°F) |
| Waves | ||||||||
| Height | 0.8m (2.5ft) | 0.9m (3.1ft) | 1.0m (3.3ft) | 1.0m (3.3ft) | 0.9m (3.0ft) | 0.8m (2.6ft) | 0.7m (2.4ft) | 0.7m (2.4ft) |
| Direction | 80° E | 83° E | 74° ENE | 71° ENE | 72° ENE | 111° ESE | 110° ESE | 109° ESE |
| Period | 0.1 sec. | 0.1 sec. | 0.1 sec. | 0.1 sec. | 0.1 sec. | 0.1 sec. | 0.1 sec. | 0.1 sec. |
| Significant height | 1.1m (3.6ft) | 1.2m (3.9ft) | 1.2m (3.9ft) | 1.1m (3.6ft) | 1.0m (3.3ft) | 0.8m (2.6ft) | 0.8m (2.6ft) | 0.8m (2.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) |
Sea weather on Saturday 6 December 2025
On Saturday 6 December 2025, the sun will rise at 06:15 and will set at 17:10 on the beach(es) of Cat Ba island. The outside temperature will be a high of 70°F t and a low of 67°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 10.6mph km/h (with gusts up to 13.7mph). Wave height will be up to 2ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | |  | | | | |
| Outside temperature | 19°C (67°F) | 19°C (67°F) | 19°C (66°F) | 20°C (69°F) | 21°C (70°F) | 21°C (69°F) | 19°C (66°F) | 20°C (68°F) |
| Perceived temperature | 19°C (67°F) | 19°C (67°F) | 19°C (66°F) | 20°C (69°F) | 21°C (70°F) | 21°C (69°F) | 19°C (66°F) | 20°C (68°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 79% | 78% | 78% | 68% | 65% | 71% | 81% | 79% |
| Barometric pressure | 1020 hPa | 1019 hPa | 1020 hPa | 1021 hPa | 1019 hPa | 1016 hPa | 1018 hPa | 1018 hPa |
| Cloud cover | 66% | 51% | 40% | 18% | 37% | 59% | 59% | 100% |
| Heat index | 19°C (67°F) | 19°C (67°F) | 19°C (66°F) | 20°C (69°F) | 24°C (76°F) | 21°C (69°F) | 19°C (66°F) | 20°C (68°F) |
| Dew point | 16°C (60°F) | 15°C (60°F) | 15°C (59°F) | 14°C (57°F) | 14°C (58°F) | 15°C (59°F) | 16°C (60°F) | 16°C (61°F) |
| Wind | ||||||||
| Speed | 9km/h (5mph) | 12km/h (8mph) | 13km/h (8mph) | 17km/h (11mph) | 17km/h (11mph) | 15km/h (9mph) | 14km/h (9mph) | 12km/h (8mph) |
| Gusts | 12km/h (8mph) | 17km/h (11mph) | 18km/h (11mph) | 21km/h (13mph) | 20km/h (13mph) | 20km/h (13mph) | 22km/h (14mph) | 18km/h (11mph) |
| Direction | 46° NE | 50° NE | 60° ENE | 74° ENE | 86° E | 95° E | 79° E | 67° ENE |
| Wind chill | 19°C (67°F) | 19°C (67°F) | 19°C (66°F) | 20°C (69°F) | 21°C (70°F) | 21°C (69°F) | 19°C (66°F) | 20°C (68°F) |
| Waves | ||||||||
| Height | 0.6m (2.0ft) | 0.6m (1.9ft) | 0.5m (1.8ft) | 0.5m (1.7ft) | 0.5m (1.6ft) | 0.4m (1.4ft) | 0.4m (1.3ft) | 0.3m (1.1ft) |
| Direction | 103° ESE | 103° ESE | 99° E | 101° ESE | 102° ESE | 107° ESE | 112° ESE | 117° ESE |
| Period | 0.1 sec. | 0.1 sec. | 0.1 sec. | 0.1 sec. | 7.2 sec. | 6.8 sec. | 6.1 sec. | 6.0 sec. |
| Significant height | 0.6m (2ft) | 0.7m (2.3ft) | 0.7m (2.3ft) | 0.6m (2ft) | 0.6m (2ft) | 0.6m (2ft) | 0.5m (1.6ft) | 0.4m (1.3ft) |
| Sea water temperature | ||||||||
| Water temperature | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) |
Sea weather on Sunday 7 December 2025
On Sunday 7 December 2025, the sun will rise at 06:16 and will set at 17:11 on the beach(es) of Cat Ba island. The outside temperature will be a high of 70°F t and a low of 67°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 13.7mph km/h (with gusts up to 18.6mph). Wave height will be up to 2.3ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | | |
| Outside temperature | 20°C (68°F) | 20°C (67°F) | 19°C (67°F) | 20°C (68°F) | 20°C (69°F) | 21°C (69°F) | 20°C (68°F) | 20°C (68°F) |
| Perceived temperature | 20°C (68°F) | 20°C (67°F) | 19°C (67°F) | 20°C (68°F) | 20°C (69°F) | 21°C (69°F) | 20°C (68°F) | 20°C (68°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 79% | 83% | 86% | 84% | 78% | 76% | 78% | 78% |
| Barometric pressure | 1018 hPa | 1017 hPa | 1018 hPa | 1021 hPa | 1020 hPa | 1018 hPa | 1019 hPa | 1020 hPa |
| Cloud cover | 100% | 100% | 100% | 100% | 100% | 49% | 23% | 29% |
| Heat index | 20°C (68°F) | 20°C (67°F) | 19°C (67°F) | 20°C (68°F) | 20°C (69°F) | 21°C (69°F) | 20°C (68°F) | 20°C (68°F) |
| Dew point | 16°C (61°F) | 17°C (62°F) | 17°C (63°F) | 17°C (63°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) | 16°C (61°F) |
| Wind | ||||||||
| Speed | 14km/h (9mph) | 17km/h (10mph) | 19km/h (12mph) | 22km/h (14mph) | 21km/h (13mph) | 18km/h (11mph) | 14km/h (9mph) | 10km/h (6mph) |
| Gusts | 20km/h (12mph) | 24km/h (15mph) | 27km/h (17mph) | 30km/h (19mph) | 28km/h (18mph) | 26km/h (16mph) | 24km/h (15mph) | 16km/h (10mph) |
| Direction | 68° ENE | 59° ENE | 56° NE | 56° NE | 55° NE | 71° ENE | 58° ENE | 29° NNE |
| Wind chill | 20°C (68°F) | 20°C (67°F) | 19°C (67°F) | 20°C (68°F) | 20°C (69°F) | 21°C (69°F) | 20°C (68°F) | 20°C (68°F) |
| Waves | ||||||||
| Height | 0.3m (1.1ft) | 0.4m (1.3ft) | 0.5m (1.6ft) | 0.6m (2.1ft) | 0.7m (2.2ft) | 0.6m (2.0ft) | 0.5m (1.8ft) | 0.5m (1.5ft) |
| Direction | 121° ESE | 121° ESE | 82° E | 91° E | 92° E | 118° ESE | 119° ESE | 119° ESE |
| Period | 5.3 sec. | 5.5 sec. | 4.6 sec. | 4.6 sec. | 4.6 sec. | 4.6 sec. | 4.6 sec. | 4.6 sec. |
| Significant height | 0.5m (1.6ft) | 0.6m (2ft) | 0.8m (2.6ft) | 0.9m (3ft) | 0.9m (3ft) | 0.8m (2.6ft) | 0.6m (2ft) | 0.5m (1.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) |
Sea weather on Monday 8 December 2025
On Monday 8 December 2025, the sun will rise at 06:16 and will set at 17:11 on the beach(es) of Cat Ba island. The outside temperature will be a high of 76°F t and a low of 65°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 9.3mph km/h (with gusts up to 13.7mph). Wave height will be up to 1.6ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | | |
| Outside temperature | 20°C (67°F) | 19°C (66°F) | 18°C (65°F) | 22°C (71°F) | 23°C (74°F) | 22°C (71°F) | 21°C (70°F) | 22°C (71°F) |
| Perceived temperature | 20°C (67°F) | 19°C (66°F) | 18°C (65°F) | 22°C (71°F) | 25°C (77°F) | 22°C (71°F) | 21°C (70°F) | 22°C (71°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 79% | 82% | 85% | 66% | 56% | 62% | 69% | 70% |
| Barometric pressure | 1020 hPa | 1019 hPa | 1020 hPa | 1021 hPa | 1019 hPa | 1017 hPa | 1019 hPa | 1020 hPa |
| Cloud cover | 47% | 27% | 22% | 18% | 46% | 42% | 56% | 41% |
| Heat index | 20°C (67°F) | 19°C (66°F) | 18°C (65°F) | 25°C (76°F) | 25°C (77°F) | 25°C (76°F) | 21°C (70°F) | 24°C (76°F) |
| Dew point | 16°C (61°F) | 16°C (61°F) | 16°C (60°F) | 15°C (59°F) | 14°C (57°F) | 14°C (58°F) | 15°C (59°F) | 16°C (60°F) |
| Wind | ||||||||
| Speed | 8km/h (5mph) | 9km/h (6mph) | 9km/h (5mph) | 5km/h (3mph) | 12km/h (8mph) | 15km/h (9mph) | 12km/h (7mph) | 13km/h (8mph) |
| Gusts | 13km/h (8mph) | 15km/h (9mph) | 15km/h (9mph) | 6km/h (4mph) | 15km/h (10mph) | 22km/h (13mph) | 20km/h (12mph) | 20km/h (13mph) |
| Direction | 2° N | 323° NW | 343° NNW | 342° NNW | 136° SE | 100° E | 83° E | 78° ENE |
| Wind chill | 20°C (67°F) | 19°C (66°F) | 18°C (65°F) | 22°C (71°F) | 23°C (74°F) | 22°C (71°F) | 21°C (70°F) | 22°C (71°F) |
| Waves | ||||||||
| Height | 0.4m (1.2ft) | 0.3m (1.0ft) | 0.2m (0.8ft) | 0.2m (0.8ft) | 0.2m (0.8ft) | 0.4m (1.3ft) | 0.5m (1.6ft) | 0.4m (1.3ft) |
| Direction | 119° ESE | 119° ESE | 117° ESE | 118° ESE | 118° ESE | 98° E | 103° ESE | 97° E |
| Period | 4.6 sec. | 4.5 sec. | 4.3 sec. | 4.3 sec. | 4.3 sec. | 4.3 sec. | 4.3 sec. | 4.3 sec. |
| Significant height | 0.6m (2ft) | 0.4m (1.3ft) | 0.4m (1.3ft) | 0.4m (1.3ft) | 0.4m (1.3ft) | 0.7m (2.3ft) | 0.5m (1.6ft) | 0.6m (2ft) |
| Sea water temperature | ||||||||
| Water temperature | 21°C (69°F) | 21°C (69°F) | 21°C (69°F) | 21°C (69°F) | 21°C (69°F) | 21°C (69°F) | 21°C (69°F) | 21°C (69°F) |
Sea weather on Tuesday 9 December 2025
On Tuesday 9 December 2025, the sun will rise at 06:17 and will set at 17:11 on the beach(es) of Cat Ba island. The outside temperature will be a high of 72°F t and a low of 63°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 11.8mph km/h (with gusts up to 15.5mph). Wave height will be up to 1.6ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | |  |
| Outside temperature | 21°C (71°F) | 21°C (69°F) | 20°C (68°F) | 22°C (71°F) | 22°C (72°F) | 21°C (70°F) | 18°C (64°F) | 18°C (65°F) |
| Perceived temperature | 21°C (71°F) | 21°C (69°F) | 20°C (68°F) | 22°C (71°F) | 25°C (76°F) | 21°C (70°F) | 18°C (64°F) | 18°C (65°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 66% | 65% | 66% | 57% | 54% | 59% | 72% | 73% |
| Barometric pressure | 1019 hPa | 1018 hPa | 1019 hPa | 1021 hPa | 1019 hPa | 1016 hPa | 1017 hPa | 1018 hPa |
| Cloud cover | 85% | 42% | 43% | 22% | 14% | 8% | 3% | 1% |
| Heat index | 24°C (76°F) | 21°C (69°F) | 20°C (68°F) | 24°C (76°F) | 25°C (76°F) | 21°C (70°F) | 18°C (64°F) | 18°C (65°F) |
| Dew point | 15°C (59°F) | 14°C (57°F) | 14°C (57°F) | 13°C (55°F) | 13°C (55°F) | 13°C (55°F) | 12°C (54°F) | 13°C (56°F) |
| Wind | ||||||||
| Speed | 16km/h (10mph) | 10km/h (6mph) | 10km/h (6mph) | 18km/h (11mph) | 19km/h (12mph) | 16km/h (10mph) | 12km/h (7mph) | 10km/h (6mph) |
| Gusts | 25km/h (16mph) | 16km/h (10mph) | 15km/h (9mph) | 22km/h (14mph) | 24km/h (15mph) | 24km/h (15mph) | 24km/h (15mph) | 19km/h (12mph) |
| Direction | 64° ENE | 47° NE | 66° ENE | 65° ENE | 93° E | 110° ESE | 97° E | 64° ENE |
| Wind chill | 21°C (71°F) | 21°C (69°F) | 20°C (68°F) | 22°C (71°F) | 22°C (72°F) | 21°C (70°F) | 18°C (64°F) | 18°C (65°F) |
| Waves | ||||||||
| Height | 0.5m (1.6ft) | 0.4m (1.4ft) | 0.3m (1.0ft) | 0.3m (0.9ft) | 0.4m (1.3ft) | 0.5m (1.5ft) | 0.5m (1.5ft) | 0.4m (1.3ft) |
| Direction | 91° E | 95° E | 101° E | 104° ESE | 98° E | 107° ESE | 119° ESE | 124° ESE |
| Period | 4.3 sec. | 4.3 sec. | 4.3 sec. | 6.7 sec. | 10.0 sec. | 11.2 sec. | 11.5 sec. | 11.6 sec. |
| Significant height | 0.7m (2.3ft) | 0.5m (1.6ft) | 0.4m (1.3ft) | 0.4m (1.3ft) | 0.6m (2ft) | 0.5m (1.6ft) | 0.5m (1.6ft) | 0.4m (1.3ft) |
| Sea water temperature | ||||||||
| Water temperature | 21°C (69°F) | 21°C (69°F) | 21°C (69°F) | 21°C (69°F) | 21°C (69°F) | 21°C (69°F) | 21°C (69°F) | 23°C (73°F) |
Sea weather on Wednesday 10 December 2025
On Wednesday 10 December 2025, the sun will rise at 06:18 and will set at 17:11 on the beach(es) of Cat Ba island. The outside temperature will be a high of 70°F t and a low of 65°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 12.4mph km/h (with gusts up to 19.3mph). Wave height will be up to 1.6ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | |  | | | |
| Outside temperature | 19°C (65°F) | 18°C (64°F) | 18°C (64°F) | 20°C (68°F) | 21°C (70°F) | 21°C (69°F) | 20°C (69°F) | 20°C (68°F) |
| Perceived temperature | 19°C (65°F) | 18°C (64°F) | 18°C (64°F) | 20°C (68°F) | 21°C (70°F) | 21°C (69°F) | 20°C (69°F) | 20°C (68°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 73% | 72% | 69% | 61% | 61% | 68% | 73% | 71% |
| Barometric pressure | 1018 hPa | 1017 hPa | 1017 hPa | 1018 hPa | 1017 hPa | 1015 hPa | 1016 hPa | 1017 hPa |
| Cloud cover | 0% | 19% | 39% | 31% | 20% | 28% | 62% | 92% |
| Heat index | 19°C (65°F) | 18°C (64°F) | 18°C (64°F) | 22°C (72°F) | 24°C (76°F) | 22°C (71°F) | 20°C (69°F) | 20°C (68°F) |
| Dew point | 14°C (56°F) | 13°C (55°F) | 12°C (54°F) | 13°C (55°F) | 13°C (56°F) | 15°C (58°F) | 15°C (59°F) | 15°C (59°F) |
| Wind | ||||||||
| Speed | 9km/h (5mph) | 8km/h (5mph) | 8km/h (5mph) | 11km/h (7mph) | 15km/h (9mph) | 19km/h (12mph) | 20km/h (13mph) | 20km/h (12mph) |
| Gusts | 15km/h (9mph) | 13km/h (8mph) | 13km/h (8mph) | 15km/h (9mph) | 21km/h (13mph) | 28km/h (17mph) | 31km/h (19mph) | 30km/h (18mph) |
| Direction | 53° NE | 40° NE | 36° NE | 66° ENE | 75° ENE | 78° ENE | 76° ENE | 67° ENE |
| Wind chill | 19°C (65°F) | 18°C (64°F) | 18°C (64°F) | 20°C (68°F) | 21°C (70°F) | 21°C (69°F) | 20°C (69°F) | 20°C (68°F) |
| Waves | ||||||||
| Height | 0.3m (1.0ft) | 0.3m (1.0ft) | 0.4m (1.3ft) | 0.5m (1.6ft) | 0.5m (1.6ft) | 0.5m (1.6ft) | 0.5m (1.6ft) | 0.5m (1.6ft) |
| Direction | 121° ESE | 120° ESE | 125° SE | 126° SE | 111° ESE | 103° ESE | 113° ESE | 119° ESE |
| Period | 11.6 sec. | 6.7 sec. | 5.1 sec. | 9.7 sec. | 12.0 sec. | 12.2 sec. | 12.2 sec. | 12.1 sec. |
| Significant height | 0.4m (1.3ft) | 0.5m (1.6ft) | 0.7m (2.3ft) | 0.7m (2.3ft) | 0.6m (2ft) | 0.6m (2ft) | 0.6m (2ft) | 0.5m (1.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) |
Sea weather on Thursday 11 December 2025
On Thursday 11 December 2025, the sun will rise at 06:18 and will set at 17:12 on the beach(es) of Cat Ba island. The outside temperature will be a high of 68°F t and a low of 65°F. Precipitation is in the forecast (0.1in throughout the day): choose the right time to go to the beach and dodge the raindrops. The sea will be generally calm, with a wind speed of up to 11.8mph km/h (with gusts up to 17.4mph). Wave height will be up to 1.3ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | |  | |  | |
| Outside temperature | 20°C (68°F) | 20°C (67°F) | 19°C (66°F) | 19°C (66°F) | 18°C (65°F) | 18°C (64°F) | 18°C (64°F) | 18°C (64°F) |
| Perceived temperature | 20°C (68°F) | 20°C (67°F) | 19°C (66°F) | 19°C (66°F) | 18°C (65°F) | 18°C (64°F) | 18°C (64°F) | 18°C (64°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 71% | 74% | 79% | 79% | 82% | 87% | 90% | 89% |
| Barometric pressure | 1017 hPa | 1016 hPa | 1017 hPa | 1018 hPa | 1017 hPa | 1015 hPa | 1016 hPa | 1017 hPa |
| Cloud cover | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% |
| Heat index | 20°C (68°F) | 20°C (67°F) | 19°C (66°F) | 19°C (66°F) | 18°C (65°F) | 18°C (64°F) | 18°C (64°F) | 18°C (64°F) |
| Dew point | 15°C (58°F) | 15°C (59°F) | 15°C (59°F) | 15°C (59°F) | 15°C (59°F) | 16°C (60°F) | 16°C (61°F) | 16°C (61°F) |
| Wind | ||||||||
| Speed | 19km/h (12mph) | 17km/h (10mph) | 14km/h (9mph) | 12km/h (8mph) | 10km/h (6mph) | 10km/h (6mph) | 10km/h (6mph) | 10km/h (6mph) |
| Gusts | 28km/h (17mph) | 24km/h (15mph) | 20km/h (13mph) | 17km/h (11mph) | 14km/h (9mph) | 16km/h (10mph) | 16km/h (10mph) | 15km/h (9mph) |
| Direction | 61° ENE | 49° NE | 44° NE | 49° NE | 30° NNE | 246° WSW | 127° SE | 20° NNE |
| Wind chill | 20°C (68°F) | 20°C (67°F) | 19°C (66°F) | 19°C (66°F) | 18°C (65°F) | 18°C (64°F) | 18°C (64°F) | 18°C (64°F) |
| Waves | ||||||||
| Height | 0.4m (1.3ft) | 0.4m (1.3ft) | 0.4m (1.3ft) | 0.3m (1.0ft) | 0.3m (1.0ft) | 0.3m (1.0ft) | 0.3m (1.0ft) | 0.3m (1.0ft) |
| Direction | 120° ESE | 123° ESE | 123° ESE | 123° ESE | 121° ESE | 121° ESE | 122° ESE | 124° ESE |
| Period | 12.5 sec. | 7.6 sec. | 5.1 sec. | 5.0 sec. | 4.7 sec. | 4.6 sec. | 4.7 sec. | 4.9 sec. |
| Significant height | 0.4m (1.3ft) | 0.6m (2ft) | 0.6m (2ft) | 0.5m (1.6ft) | 0.4m (1.3ft) | 0.4m (1.3ft) | 0.4m (1.3ft) | 0.5m (1.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) |