Sea weather in Knokke-Heist in Belgium All the beach weather in Knokke-Heist
All the essential weather information for enjoying the beach in Knokke-Heist in Belgium, 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 Knokke-Heist over the next 7 days?
Discover the best moment to go to the beach in Knokke-Heist in Belgium this week to enjoy the best weather and calmest sea possible. Our opinion is based on reliable sea weather forecasts in Knokke-Heist. 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 |
|---|---|---|---|---|
| Monday 15 December 2025 | 43°F to 49°F | 16.2mph | discouraged | all the sea weather |
| Tuesday 16 December 2025 | 47°F to 50°F | 9.3mph | discouraged | all the sea weather |
| Wednesday 17 December 2025 | 45°F to 50°F | 9.3mph | recommended | all the sea weather |
| Thursday 18 December 2025 | 43°F to 50°F | 24.2mph | discouraged | all the sea weather |
| Friday 19 December 2025 | 41°F to 52°F | 9.3mph | discouraged | all the sea weather |
| Saturday 20 December 2025 | 40°F to 43°F | 13.1mph | discouraged | all the sea weather |
| Sunday 21 December 2025 | 40°F to 41°F | 11.8mph | discouraged | all the sea weather |
Sea Weather: Your daily and hourly sea weather in Knokke-Heist
Sea weather on Monday 15 December 2025
On Monday 15 December 2025, the sun will rise at 08:46 and will set at 16:39 on the beach(es) of Knokke-Heist. The outside temperature will be a high of 49°F t and a low of 43°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 20.5mph km/h (with gusts up to 31.1mph). 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 | 7°C (45°F) | 7°C (45°F) | 7°C (45°F) | 7°C (45°F) | 7°C (45°F) | 9°C (47°F) | 9°C (48°F) | 9°C (48°F) |
| Perceived temperature | 3°C (37°F) | 3°C (37°F) | 2°C (36°F) | 3°C (37°F) | 3°C (37°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 88% | 86% | 84% | 83% | 81% | 80% | 83% | 85% |
| Barometric pressure | 1016 hPa | 1014 hPa | 1012 hPa | 1012 hPa | 1012 hPa | 1010 hPa | 1010 hPa | 1011 hPa |
| Cloud cover | 8% | 3% | 4% | 3% | 3% | 15% | 100% | 30% |
| Heat index | 7°C (45°F) | 7°C (45°F) | 7°C (45°F) | 7°C (45°F) | 7°C (45°F) | 9°C (47°F) | 9°C (48°F) | 9°C (48°F) |
| Dew point | 5°C (42°F) | 5°C (41°F) | 4°C (40°F) | 5°C (40°F) | 4°C (39°F) | 5°C (42°F) | 6°C (43°F) | 6°C (43°F) |
| Wind | ||||||||
| Speed | 31km/h (19mph) | 30km/h (19mph) | 33km/h (21mph) | 32km/h (20mph) | 32km/h (20mph) | 28km/h (17mph) | 27km/h (17mph) | 26km/h (16mph) |
| Gusts | 38km/h (24mph) | 35km/h (22mph) | 35km/h (22mph) | 50km/h (31mph) | 34km/h (21mph) | 35km/h (22mph) | 45km/h (28mph) | 44km/h (27mph) |
| Direction | 188° S | 186° S | 179° S | 186° S | 193° SSW | 188° S | 181° S | 174° S |
| Wind chill | 3°C (37°F) | 3°C (37°F) | 2°C (36°F) | 3°C (37°F) | 3°C (37°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) |
| Waves | ||||||||
| Height | 0.6m (2.1ft) | 0.6m (2.1ft) | 0.7m (2.2ft) | 0.7m (2.2ft) | 0.7m (2.4ft) | 0.7m (2.3ft) | 0.6m (2.0ft) | 0.6m (1.9ft) |
| Direction | 266° W | 264° W | 263° W | 260° W | 251° WSW | 265° W | 274° W | 268° W |
| Period | 4.9 sec. | 5.0 sec. | 5.0 sec. | 4.9 sec. | 4.9 sec. | 5.3 sec. | 5.9 sec. | 5.3 sec. |
| Significant height | 1.0m (3.3ft) | 1.1m (3.6ft) | 1.1m (3.6ft) | 1.1m (3.6ft) | 1.2m (3.9ft) | 1.1m (3.6ft) | 1.0m (3.3ft) | 0.9m (3ft) |
| Sea water temperature | ||||||||
| Water temperature | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) |
Sea weather on Tuesday 16 December 2025
On Tuesday 16 December 2025, the sun will rise at 08:46 and will set at 16:39 on the beach(es) of Knokke-Heist. The outside temperature will be a high of 50°F t and a low of 47°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 17.4mph km/h (with gusts up to 26.1mph). 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 | 9°C (49°F) | 9°C (48°F) | 8°C (47°F) | 9°C (49°F) | 9°C (49°F) | 10°C (50°F) | 9°C (48°F) | 9°C (48°F) |
| Perceived temperature | 6°C (42°F) | 5°C (41°F) | 5°C (41°F) | 6°C (43°F) | 6°C (43°F) | 8°C (46°F) | 6°C (43°F) | 7°C (44°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 87% | 88% | 87% | 83% | 81% | 76% | 76% | 80% |
| Barometric pressure | 1011 hPa | 1010 hPa | 1010 hPa | 1011 hPa | 1012 hPa | 1013 hPa | 1014 hPa | 1015 hPa |
| Cloud cover | 60% | 68% | 68% | 28% | 26% | 22% | 81% | 81% |
| Heat index | 9°C (49°F) | 9°C (48°F) | 8°C (47°F) | 9°C (49°F) | 9°C (49°F) | 10°C (50°F) | 9°C (48°F) | 9°C (48°F) |
| Dew point | 7°C (45°F) | 7°C (44°F) | 6°C (43°F) | 6°C (44°F) | 6°C (43°F) | 6°C (43°F) | 5°C (41°F) | 6°C (43°F) |
| Wind | ||||||||
| Speed | 28km/h (17mph) | 28km/h (17mph) | 25km/h (16mph) | 24km/h (15mph) | 23km/h (14mph) | 19km/h (12mph) | 17km/h (10mph) | 15km/h (10mph) |
| Gusts | 34km/h (21mph) | 32km/h (20mph) | 26km/h (16mph) | 42km/h (26mph) | 28km/h (17mph) | 37km/h (23mph) | 24km/h (15mph) | 30km/h (19mph) |
| Direction | 169° S | 160° SSE | 162° SSE | 164° SSE | 172° S | 187° S | 176° S | 187° S |
| Wind chill | 6°C (42°F) | 5°C (41°F) | 5°C (41°F) | 6°C (43°F) | 6°C (43°F) | 8°C (46°F) | 6°C (43°F) | 7°C (44°F) |
| Waves | ||||||||
| Height | 0.5m (1.6ft) | 0.4m (1.3ft) | 0.4m (1.2ft) | 0.4m (1.2ft) | 0.4m (1.3ft) | 0.3m (1.1ft) | 0.2m (0.8ft) | 0.2m (0.8ft) |
| Direction | 257° WSW | 174° S | 170° S | 176° S | 177° S | 182° S | 180° S | 188° S |
| Period | 4.3 sec. | 4.1 sec. | 4.0 sec. | 5.8 sec. | 5.8 sec. | 5.8 sec. | 5.5 sec. | 5.3 sec. |
| Significant height | 0.8m (2.6ft) | 0.7m (2.3ft) | 0.7m (2.3ft) | 0.7m (2.3ft) | 0.7m (2.3ft) | 0.6m (2ft) | 0.4m (1.3ft) | 0.4m (1.3ft) |
| Sea water temperature | ||||||||
| Water temperature | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) |
Sea weather on Wednesday 17 December 2025
On Wednesday 17 December 2025, the sun will rise at 08:47 and will set at 16:39 on the beach(es) of Knokke-Heist. The outside temperature will be a high of 50°F t and a low of 45°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 16.8mph). 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 | 10°C (49°F) | 9°C (49°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 8°C (47°F) | 7°C (45°F) | 8°C (47°F) |
| Perceived temperature | 8°C (46°F) | 8°C (47°F) | 7°C (44°F) | 7°C (44°F) | 8°C (46°F) | 7°C (45°F) | 5°C (41°F) | 6°C (42°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 89% | 96% | 95% | 90% | 85% | 83% | 88% | 81% |
| Barometric pressure | 1016 hPa | 1017 hPa | 1018 hPa | 1020 hPa | 1021 hPa | 1021 hPa | 1022 hPa | 1021 hPa |
| Cloud cover | 72% | 100% | 100% | 100% | 45% | 25% | 37% | 29% |
| Heat index | 10°C (49°F) | 9°C (49°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 8°C (47°F) | 7°C (45°F) | 8°C (47°F) |
| Dew point | 8°C (46°F) | 9°C (48°F) | 8°C (47°F) | 8°C (46°F) | 6°C (43°F) | 6°C (42°F) | 5°C (42°F) | 5°C (41°F) |
| Wind | ||||||||
| Speed | 13km/h (8mph) | 8km/h (5mph) | 15km/h (9mph) | 15km/h (10mph) | 8km/h (5mph) | 8km/h (5mph) | 12km/h (7mph) | 15km/h (10mph) |
| Gusts | 24km/h (15mph) | 14km/h (9mph) | 23km/h (14mph) | 23km/h (15mph) | 12km/h (8mph) | 12km/h (8mph) | 21km/h (13mph) | 27km/h (17mph) |
| Direction | 220° SW | 277° W | 353° N | 337° NNW | 356° N | 267° W | 218° SW | 200° SSW |
| Wind chill | 8°C (46°F) | 8°C (47°F) | 7°C (44°F) | 7°C (44°F) | 8°C (46°F) | 7°C (45°F) | 5°C (41°F) | 6°C (42°F) |
| Waves | ||||||||
| Height | 0.2m (0.8ft) | 0.2m (0.8ft) | 0.2m (0.6ft) | 0.3m (1.1ft) | 0.4m (1.5ft) | 0.4m (1.2ft) | 0.3m (1.0ft) | 0.3m (1.1ft) |
| Direction | 235° SW | 253° WSW | 258° WSW | 327° NNW | 337° NNW | 342° NNW | 344° NNW | 346° NNW |
| Period | 5.3 sec. | 5.2 sec. | 5.2 sec. | 3.0 sec. | 4.9 sec. | 4.8 sec. | 4.5 sec. | 4.3 sec. |
| Significant height | 0.4m (1.3ft) | 0.3m (1ft) | 0.4m (1.3ft) | 0.4m (1.3ft) | 0.7m (2.3ft) | 0.6m (2ft) | 0.5m (1.6ft) | 0.5m (1.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) |
Sea weather on Thursday 18 December 2025
On Thursday 18 December 2025, the sun will rise at 08:48 and will set at 16:40 on the beach(es) of Knokke-Heist. The outside temperature will be a high of 50°F t and a low of 43°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 24.9mph km/h (with gusts up to 26.7mph). 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 | 7°C (45°F) | 7°C (44°F) | 6°C (43°F) | 6°C (43°F) | 8°C (47°F) | 10°C (49°F) | 9°C (49°F) | 10°C (50°F) |
| Perceived temperature | 4°C (40°F) | 3°C (37°F) | 2°C (36°F) | 2°C (36°F) | 5°C (41°F) | 6°C (42°F) | 5°C (41°F) | 6°C (43°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 85% | 89% | 91% | 92% | 91% | 80% | 85% | 78% |
| Barometric pressure | 1021 hPa | 1020 hPa | 1019 hPa | 1018 hPa | 1016 hPa | 1013 hPa | 1010 hPa | 1010 hPa |
| Cloud cover | 24% | 42% | 21% | 23% | 60% | 38% | 40% | 100% |
| Heat index | 7°C (45°F) | 7°C (44°F) | 6°C (43°F) | 6°C (43°F) | 8°C (47°F) | 10°C (49°F) | 9°C (49°F) | 10°C (50°F) |
| Dew point | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 7°C (45°F) | 6°C (43°F) | 7°C (44°F) | 6°C (43°F) |
| Wind | ||||||||
| Speed | 17km/h (11mph) | 21km/h (13mph) | 22km/h (14mph) | 24km/h (15mph) | 25km/h (15mph) | 32km/h (20mph) | 40km/h (25mph) | 39km/h (24mph) |
| Gusts | 30km/h (19mph) | 36km/h (23mph) | 38km/h (24mph) | 26km/h (16mph) | 39km/h (24mph) | 32km/h (20mph) | 43km/h (27mph) | 43km/h (27mph) |
| Direction | 198° SSW | 192° SSW | 182° S | 176° S | 172° S | 173° S | 168° SSE | 185° S |
| Wind chill | 4°C (40°F) | 3°C (37°F) | 2°C (36°F) | 2°C (36°F) | 5°C (41°F) | 6°C (42°F) | 5°C (41°F) | 6°C (43°F) |
| Waves | ||||||||
| Height | 0.4m (1.3ft) | 0.4m (1.5ft) | 0.5m (1.6ft) | 0.4m (1.4ft) | 0.5m (1.5ft) | 0.5m (1.6ft) | 0.5m (1.6ft) | 0.6m (2.1ft) |
| Direction | 269° W | 288° WNW | 275° W | 266° W | 266° W | 256° WSW | 182° S | 188° S |
| Period | 4.1 sec. | 4.0 sec. | 4.3 sec. | 4.3 sec. | 4.5 sec. | 4.4 sec. | 4.3 sec. | 4.5 sec. |
| Significant height | 0.5m (1.6ft) | 0.5m (1.6ft) | 0.8m (2.6ft) | 0.7m (2.3ft) | 0.8m (2.6ft) | 0.9m (3ft) | 0.9m (3ft) | 1.1m (3.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) |
Sea weather on Friday 19 December 2025
On Friday 19 December 2025, the sun will rise at 08:49 and will set at 16:40 on the beach(es) of Knokke-Heist. The outside temperature will be a high of 52°F t and a low of 41°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 24.9mph km/h (with gusts up to 28.6mph). Wave height will be up to 3.9ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | |  | |  |
| Outside temperature | 10°C (50°F) | 10°C (49°F) | 11°C (51°F) | 9°C (49°F) | 8°C (47°F) | 8°C (46°F) | 6°C (42°F) | 6°C (43°F) |
| Perceived temperature | 6°C (43°F) | 6°C (42°F) | 7°C (45°F) | 6°C (42°F) | 5°C (40°F) | 4°C (40°F) | 3°C (37°F) | 3°C (37°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 80% | 88% | 86% | 84% | 73% | 71% | 73% | 78% |
| Barometric pressure | 1009 hPa | 1009 hPa | 1010 hPa | 1013 hPa | 1017 hPa | 1018 hPa | 1020 hPa | 1021 hPa |
| Cloud cover | 100% | 100% | 100% | 81% | 31% | 27% | 12% | 3% |
| Heat index | 10°C (50°F) | 10°C (49°F) | 11°C (51°F) | 9°C (49°F) | 8°C (47°F) | 8°C (46°F) | 6°C (42°F) | 6°C (43°F) |
| Dew point | 7°C (44°F) | 8°C (46°F) | 8°C (47°F) | 7°C (44°F) | 4°C (39°F) | 3°C (37°F) | 1°C (35°F) | 3°C (37°F) |
| Wind | ||||||||
| Speed | 39km/h (24mph) | 40km/h (25mph) | 36km/h (23mph) | 30km/h (18mph) | 26km/h (16mph) | 22km/h (14mph) | 17km/h (10mph) | 15km/h (10mph) |
| Gusts | 46km/h (29mph) | 45km/h (28mph) | 40km/h (25mph) | 31km/h (19mph) | 40km/h (25mph) | 36km/h (22mph) | 32km/h (20mph) | 29km/h (18mph) |
| Direction | 182° S | 191° S | 223° SW | 238° WSW | 289° WNW | 279° W | 260° W | 226° SW |
| Wind chill | 6°C (43°F) | 6°C (42°F) | 7°C (45°F) | 6°C (42°F) | 5°C (40°F) | 4°C (40°F) | 3°C (37°F) | 3°C (37°F) |
| Waves | ||||||||
| Height | 0.7m (2.2ft) | 1.2m (3.9ft) | 1.2m (3.8ft) | 1.1m (3.6ft) | 1.0m (3.2ft) | 0.7m (2.3ft) | 0.6m (2.0ft) | 0.5m (1.6ft) |
| Direction | 193° SSW | 208° SSW | 209° SSW | 213° SSW | 213° SSW | 239° WSW | 250° WSW | 250° WSW |
| Period | 4.6 sec. | 18.2 sec. | 20.7 sec. | 21.4 sec. | 21.4 sec. | 21.4 sec. | 21.4 sec. | 21.4 sec. |
| Significant height | 1.1m (3.6ft) | 1.3m (4.3ft) | 1.3m (4.3ft) | 1.2m (3.9ft) | 0.9m (3ft) | 0.6m (2ft) | 0.5m (1.6ft) | 0.5m (1.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 7°C (44°F) | 9°C (47°F) | 9°C (47°F) | 9°C (47°F) |
Sea weather on Saturday 20 December 2025
On Saturday 20 December 2025, the sun will rise at 08:49 and will set at 16:40 on the beach(es) of Knokke-Heist. The outside temperature will be a high of 43°F t and a low of 40°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 14.3mph km/h (with gusts up to 23.6mph). 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 | 6°C (44°F) | 6°C (43°F) | 5°C (42°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 4°C (39°F) | 4°C (40°F) |
| Perceived temperature | 3°C (37°F) | 2°C (36°F) | 1°C (34°F) | 1°C (33°F) | 1°C (33°F) | 1°C (33°F) | -0°C (31°F) | 0°C (32°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 81% | 85% | 88% | 88% | 81% | 78% | 83% | 85% |
| Barometric pressure | 1021 hPa | 1020 hPa | 1019 hPa | 1019 hPa | 1018 hPa | 1016 hPa | 1015 hPa | 1014 hPa |
| Cloud cover | 3% | 5% | 9% | 6% | 3% | 2% | 4% | 4% |
| Heat index | 6°C (44°F) | 6°C (43°F) | 5°C (42°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 4°C (39°F) | 4°C (40°F) |
| Dew point | 3°C (38°F) | 4°C (38°F) | 4°C (38°F) | 3°C (38°F) | 2°C (35°F) | 1°C (34°F) | 1°C (34°F) | 2°C (36°F) |
| Wind | ||||||||
| Speed | 18km/h (11mph) | 19km/h (12mph) | 21km/h (13mph) | 22km/h (14mph) | 23km/h (14mph) | 21km/h (13mph) | 21km/h (13mph) | 21km/h (13mph) |
| Gusts | 32km/h (20mph) | 34km/h (21mph) | 37km/h (23mph) | 38km/h (23mph) | 30km/h (19mph) | 26km/h (16mph) | 23km/h (14mph) | 31km/h (19mph) |
| Direction | 213° SSW | 208° SSW | 195° SSW | 185° S | 186° S | 176° S | 165° SSE | 162° SSE |
| Wind chill | 3°C (37°F) | 2°C (36°F) | 1°C (34°F) | 1°C (33°F) | 1°C (33°F) | 1°C (33°F) | -0°C (31°F) | 0°C (32°F) |
| Waves | ||||||||
| Height | 0.4m (1.3ft) | 0.4m (1.3ft) | 0.4m (1.3ft) | 0.3m (1.0ft) | 0.3m (1.0ft) | 0.2m (0.7ft) | 0.2m (0.7ft) | 0.2m (0.7ft) |
| Direction | 255° WSW | 270° W | 282° WNW | 295° WNW | 305° NW | 312° NW | 325° NW | 331° NNW |
| Period | 9.9 sec. | 4.0 sec. | 3.8 sec. | 3.6 sec. | 3.4 sec. | 3.3 sec. | 5.3 sec. | 6.2 sec. |
| Significant height | 0.6m (2ft) | 0.6m (2ft) | 0.5m (1.6ft) | 0.5m (1.6ft) | 0.3m (1ft) | 0.2m (0.7ft) | 0.2m (0.7ft) | 0.3m (1ft) |
| Sea water temperature | ||||||||
| Water temperature | 9°C (47°F) | 9°C (47°F) | 9°C (47°F) | 9°C (47°F) | 9°C (47°F) | 9°C (47°F) | 9°C (47°F) | 9°C (47°F) |
Sea weather on Sunday 21 December 2025
On Sunday 21 December 2025, the sun will rise at 08:50 and will set at 16:41 on the beach(es) of Knokke-Heist. The outside temperature will be a high of 41°F t and a low of 40°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 21.1mph). 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 | 4°C (40°F) | 4°C (39°F) | 4°C (39°F) | 4°C (38°F) | 5°C (40°F) | 5°C (41°F) | 5°C (41°F) | 5°C (40°F) |
| Perceived temperature | 0°C (33°F) | -0°C (32°F) | -1°C (31°F) | -1°C (31°F) | 1°C (33°F) | 2°C (35°F) | 1°C (34°F) | 1°C (33°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 80% | 76% | 83% | 89% | 86% | 84% | 87% | 89% |
| Barometric pressure | 1013 hPa | 1012 hPa | 1011 hPa | 1011 hPa | 1010 hPa | 1009 hPa | 1010 hPa | 1011 hPa |
| Cloud cover | 5% | 53% | 32% | 30% | 45% | 64% | 71% | 64% |
| Heat index | 4°C (40°F) | 4°C (39°F) | 4°C (39°F) | 4°C (38°F) | 5°C (40°F) | 5°C (41°F) | 5°C (41°F) | 5°C (40°F) |
| Dew point | 1°C (34°F) | 0°C (32°F) | 1°C (34°F) | 2°C (35°F) | 2°C (36°F) | 3°C (37°F) | 3°C (37°F) | 3°C (37°F) |
| Wind | ||||||||
| Speed | 20km/h (13mph) | 19km/h (12mph) | 19km/h (12mph) | 20km/h (13mph) | 20km/h (13mph) | 19km/h (12mph) | 19km/h (12mph) | 19km/h (12mph) |
| Gusts | 34km/h (21mph) | 33km/h (21mph) | 32km/h (20mph) | 33km/h (21mph) | 31km/h (19mph) | 30km/h (19mph) | 33km/h (21mph) | 33km/h (21mph) |
| Direction | 164° SSE | 165° SSE | 163° SSE | 159° SSE | 160° SSE | 154° SSE | 155° SSE | 160° SSE |
| Wind chill | 0°C (33°F) | -0°C (32°F) | -1°C (31°F) | -1°C (31°F) | 1°C (33°F) | 2°C (35°F) | 1°C (34°F) | 1°C (33°F) |
| Waves | ||||||||
| Height | 0.2m (0.7ft) | 0.2m (0.7ft) | 0.3m (1.0ft) | 0.4m (1.3ft) | 0.5m (1.6ft) | 0.5m (1.6ft) | 0.5m (1.6ft) | 0.5m (1.6ft) |
| Direction | 332° NNW | 332° NNW | 294° WNW | 270° W | 264° W | 258° WSW | 253° WSW | 248° WSW |
| Period | 5.9 sec. | 5.5 sec. | 3.8 sec. | 4.2 sec. | 4.8 sec. | 4.6 sec. | 4.5 sec. | 4.5 sec. |
| Significant height | 0.4m (1.3ft) | 0.4m (1.3ft) | 0.5m (1.6ft) | 0.6m (2ft) | 0.6m (2ft) | 0.7m (2.3ft) | 0.8m (2.6ft) | 0.7m (2.3ft) |
| Sea water temperature | ||||||||
| Water temperature | 9°C (47°F) | 9°C (47°F) | 9°C (47°F) | 9°C (47°F) | 9°C (47°F) | 9°C (47°F) | 9°C (47°F) | 9°C (47°F) |