Sea weather in Sein island (Île-de-Sein) in Brittany All the beach weather in Sein island (Île-de-Sein)
All the essential weather information for enjoying the beach in Sein island (Île-de-Sein) in Brittany, 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 Sein island (Île-de-Sein) over the next 7 days?
Discover the best moment to go to the beach in Sein island (Île-de-Sein) in Brittany this week to enjoy the best weather and calmest sea possible. Our opinion is based on reliable sea weather forecasts in Sein island (Île-de-Sein). 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 | 54°F to 56°F | 16.2mph | not recommended | all the sea weather |
| Tuesday 16 December 2025 | 52°F to 54°F | 14.9mph | discouraged | all the sea weather |
| Wednesday 17 December 2025 | 52°F to 54°F | 23mph | discouraged | all the sea weather |
| Thursday 18 December 2025 | 52°F to 56°F | 29.2mph | not recommended | all the sea weather |
| Friday 19 December 2025 | 50°F to 54°F | 11.2mph | not recommended | all the sea weather |
| Saturday 20 December 2025 | 47°F to 54°F | 17.4mph | not recommended | all the sea weather |
| Sunday 21 December 2025 | 49°F to 52°F | 13.7mph | discouraged | all the sea weather |
Sea Weather: Your daily and hourly sea weather in Sein island (Île-de-Sein)
Sea weather on Monday 15 December 2025
On Monday 15 December 2025, the sun will rise at 09:03 and will set at 17:27 on the beach(es) of Sein island (Île-de-Sein). The outside temperature will be a high of 56°F t and a low of 54°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! Be careful, the sea will be generally rough with a wind speed of up to 30.5mph km/h (with gusts up to 35.4mph). Wave height will be up to 12.1ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition |  |  | | |  |  | |  |
| Outside temperature | 13°C (56°F) | 13°C (55°F) | 13°C (55°F) | 13°C (55°F) | 13°C (55°F) | 12°C (54°F) | 12°C (53°F) | 13°C (55°F) |
| Perceived temperature | 10°C (51°F) | 10°C (50°F) | 10°C (50°F) | 10°C (49°F) | 10°C (49°F) | 9°C (48°F) | 8°C (47°F) | 10°C (50°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 82% | 86% | 87% | 81% | 82% | 84% | 85% | 87% |
| Barometric pressure | 1012 hPa | 1009 hPa | 1007 hPa | 1006 hPa | 1005 hPa | 1002 hPa | 1001 hPa | 1001 hPa |
| Cloud cover | 98% | 17% | 68% | 100% | 100% | 100% | 100% | 100% |
| Heat index | 13°C (56°F) | 13°C (55°F) | 13°C (55°F) | 13°C (55°F) | 13°C (55°F) | 12°C (54°F) | 12°C (53°F) | 13°C (55°F) |
| Dew point | 10°C (50°F) | 11°C (51°F) | 11°C (52°F) | 9°C (49°F) | 10°C (49°F) | 10°C (49°F) | 9°C (49°F) | 10°C (51°F) |
| Wind | ||||||||
| Speed | 36km/h (22mph) | 39km/h (24mph) | 35km/h (21mph) | 36km/h (22mph) | 40km/h (25mph) | 46km/h (29mph) | 49km/h (30mph) | 26km/h (16mph) |
| Gusts | 52km/h (32mph) | 54km/h (34mph) | 49km/h (30mph) | 50km/h (31mph) | 57km/h (36mph) | 48km/h (30mph) | 51km/h (32mph) | 38km/h (23mph) |
| Direction | 193° SSW | 190° S | 207° SSW | 209° SSW | 205° SSW | 187° S | 183° S | 217° SW |
| Wind chill | 10°C (51°F) | 10°C (50°F) | 10°C (50°F) | 10°C (49°F) | 10°C (49°F) | 9°C (48°F) | 8°C (47°F) | 10°C (50°F) |
| Waves | ||||||||
| Height | 2.9m (9.4ft) | 2.9m (9.6ft) | 2.9m (9.7ft) | 3.0m (10.0ft) | 3.3m (10.9ft) | 3.3m (10.8ft) | 3.3m (11.0ft) | 3.7m (12.0ft) |
| Direction | 274° W | 274° W | 273° W | 272° W | 270° W | 269° W | 269° W | 270° W |
| Period | 14.1 sec. | 13.9 sec. | 13.7 sec. | 13.5 sec. | 13.1 sec. | 13.4 sec. | 17.2 sec. | 13.3 sec. |
| Significant height | 1.2m (3.9ft) | 1.3m (4.3ft) | 1.2m (3.9ft) | 1.3m (4.3ft) | 1.6m (5.2ft) | 1.3m (4.3ft) | 1.6m (5.2ft) | 1.9m (6.2ft) |
| Sea water temperature | ||||||||
| Water temperature | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) |
Sea weather on Tuesday 16 December 2025
On Tuesday 16 December 2025, the sun will rise at 09:04 and will set at 17:27 on the beach(es) of Sein island (Île-de-Sein). The outside temperature will be a high of 54°F t and a low of 52°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 23.6mph km/h (with gusts up to 31.7mph). Wave height will be up to 12.8ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | | |
| Outside temperature | 12°C (53°F) | 12°C (53°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (51°F) | 11°C (52°F) |
| Perceived temperature | 8°C (47°F) | 8°C (47°F) | 8°C (47°F) | 8°C (46°F) | 7°C (45°F) | 8°C (46°F) | 7°C (45°F) | 8°C (47°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 79% | 77% | 72% | 69% | 70% | 70% | 69% | 67% |
| Barometric pressure | 1004 hPa | 1006 hPa | 1007 hPa | 1011 hPa | 1013 hPa | 1015 hPa | 1017 hPa | 1020 hPa |
| Cloud cover | 76% | 100% | 85% | 100% | 74% | 75% | 36% | 19% |
| Heat index | 12°C (53°F) | 12°C (53°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (51°F) | 11°C (52°F) |
| Dew point | 8°C (47°F) | 8°C (46°F) | 6°C (43°F) | 6°C (42°F) | 6°C (42°F) | 6°C (43°F) | 5°C (41°F) | 5°C (41°F) |
| Wind | ||||||||
| Speed | 38km/h (23mph) | 32km/h (20mph) | 32km/h (20mph) | 34km/h (21mph) | 35km/h (21mph) | 33km/h (21mph) | 30km/h (19mph) | 24km/h (15mph) |
| Gusts | 51km/h (32mph) | 42km/h (26mph) | 43km/h (27mph) | 46km/h (28mph) | 49km/h (30mph) | 47km/h (29mph) | 45km/h (28mph) | 33km/h (20mph) |
| Direction | 334° NNW | 360° N | 4° N | 357° N | 3° N | 359° N | 4° N | 0° N |
| Wind chill | 8°C (47°F) | 8°C (47°F) | 8°C (47°F) | 8°C (46°F) | 7°C (45°F) | 8°C (46°F) | 7°C (45°F) | 8°C (47°F) |
| Waves | ||||||||
| Height | 3.9m (12.8ft) | 3.5m (11.5ft) | 3.5m (11.4ft) | 3.5m (11.5ft) | 3.3m (10.9ft) | 3.2m (10.5ft) | 3.0m (9.9ft) | 2.8m (9.3ft) |
| Direction | 275° W | 275° W | 276° W | 279° W | 279° W | 279° W | 278° W | 277° W |
| Period | 14.1 sec. | 13.9 sec. | 13.9 sec. | 14.3 sec. | 14.3 sec. | 14.2 sec. | 14.1 sec. | 14.1 sec. |
| Significant height | 1.6m (5.2ft) | 0.5m (1.6ft) | 1.8m (5.9ft) | 1.7m (5.6ft) | 1.5m (4.9ft) | 1.5m (4.9ft) | 1.2m (3.9ft) | 0.9m (3ft) |
| Sea water temperature | ||||||||
| Water temperature | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) |
Sea weather on Wednesday 17 December 2025
On Wednesday 17 December 2025, the sun will rise at 09:04 and will set at 17:27 on the beach(es) of Sein island (Île-de-Sein). The outside temperature will be a high of 54°F t and a low of 52°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 23mph km/h (with gusts up to 32.9mph). Wave height will be up to 8.9ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | |  | | |  | | | |
| Outside temperature | 11°C (52°F) | 11°C (51°F) | 11°C (51°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 12°C (53°F) | 12°C (54°F) |
| Perceived temperature | 9°C (49°F) | 10°C (50°F) | 10°C (50°F) | 9°C (49°F) | 8°C (47°F) | 8°C (47°F) | 8°C (47°F) | 9°C (48°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 63% | 61% | 61% | 63% | 64% | 65% | 67% | 74% |
| Barometric pressure | 1021 hPa | 1022 hPa | 1022 hPa | 1023 hPa | 1023 hPa | 1021 hPa | 1020 hPa | 1019 hPa |
| Cloud cover | 4% | 0% | 5% | 22% | 44% | 49% | 86% | 100% |
| Heat index | 11°C (52°F) | 11°C (51°F) | 11°C (51°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 12°C (53°F) | 12°C (54°F) |
| Dew point | 4°C (40°F) | 4°C (39°F) | 4°C (39°F) | 4°C (40°F) | 5°C (40°F) | 5°C (41°F) | 6°C (42°F) | 8°C (46°F) |
| Wind | ||||||||
| Speed | 15km/h (9mph) | 9km/h (5mph) | 9km/h (6mph) | 14km/h (9mph) | 23km/h (14mph) | 30km/h (19mph) | 36km/h (22mph) | 37km/h (23mph) |
| Gusts | 20km/h (12mph) | 12km/h (7mph) | 12km/h (8mph) | 19km/h (11mph) | 33km/h (21mph) | 44km/h (27mph) | 53km/h (33mph) | 53km/h (33mph) |
| Direction | 356° N | 326° NW | 273° W | 215° SW | 205° SSW | 199° SSW | 201° SSW | 197° SSW |
| Wind chill | 9°C (49°F) | 10°C (50°F) | 10°C (50°F) | 9°C (49°F) | 8°C (47°F) | 8°C (47°F) | 8°C (47°F) | 9°C (48°F) |
| Waves | ||||||||
| Height | 2.7m (8.9ft) | 2.7m (8.8ft) | 2.7m (8.8ft) | 2.6m (8.5ft) | 2.4m (8.0ft) | 2.2m (7.4ft) | 2.1m (7.0ft) | 2.2m (7.2ft) |
| Direction | 276° W | 277° W | 277° W | 276° W | 276° W | 276° W | 277° W | 279° W |
| Period | 14.1 sec. | 14.0 sec. | 13.9 sec. | 13.7 sec. | 13.5 sec. | 13.3 sec. | 13.0 sec. | 12.7 sec. |
| Significant height | 0.6m (2ft) | 0.3m (1ft) | 0.3m (1ft) | 0.3m (1ft) | 0.6m (2ft) | 0.9m (3ft) | 1.1m (3.6ft) | 1.1m (3.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) |
Sea weather on Thursday 18 December 2025
On Thursday 18 December 2025, the sun will rise at 09:05 and will set at 17:28 on the beach(es) of Sein island (Île-de-Sein). The outside temperature will be a high of 56°F t and a low of 52°F. Precipitation is in the forecast (0.1in throughout the day): choose the right time to go to the beach and dodge the raindrops. Be careful, the sea will be generally rough with a wind speed of up to 38.5mph km/h (with gusts up to 41.6mph). Wave height will be up to 17.4ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | | |
| Outside temperature | 13°C (55°F) | 13°C (55°F) | 13°C (55°F) | 13°C (55°F) | 13°C (55°F) | 12°C (54°F) | 12°C (54°F) | 12°C (54°F) |
| Perceived temperature | 9°C (49°F) | 9°C (49°F) | 9°C (48°F) | 9°C (49°F) | 9°C (48°F) | 8°C (46°F) | 9°C (48°F) | 8°C (47°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0.1in | 0in | 0in |
| Humidity | 79% | 81% | 84% | 87% | 84% | 92% | 87% | 75% |
| Barometric pressure | 1018 hPa | 1015 hPa | 1012 hPa | 1008 hPa | 1006 hPa | 1004 hPa | 1005 hPa | 1008 hPa |
| Cloud cover | 38% | 93% | 72% | 77% | 100% | 100% | 100% | 21% |
| Heat index | 13°C (55°F) | 13°C (55°F) | 13°C (55°F) | 13°C (55°F) | 13°C (55°F) | 12°C (54°F) | 12°C (54°F) | 12°C (54°F) |
| Dew point | 9°C (48°F) | 9°C (49°F) | 10°C (50°F) | 11°C (51°F) | 10°C (50°F) | 11°C (51°F) | 10°C (51°F) | 8°C (46°F) |
| Wind | ||||||||
| Speed | 39km/h (24mph) | 40km/h (25mph) | 49km/h (30mph) | 53km/h (33mph) | 61km/h (38mph) | 62km/h (38mph) | 42km/h (26mph) | 47km/h (29mph) |
| Gusts | 53km/h (33mph) | 55km/h (34mph) | 67km/h (41mph) | 54km/h (33mph) | 67km/h (42mph) | 65km/h (40mph) | 45km/h (28mph) | 64km/h (40mph) |
| Direction | 192° SSW | 184° S | 174° S | 174° S | 188° S | 207° SSW | 240° WSW | 252° WSW |
| Wind chill | 9°C (49°F) | 9°C (49°F) | 9°C (48°F) | 9°C (49°F) | 9°C (48°F) | 8°C (46°F) | 9°C (48°F) | 8°C (47°F) |
| Waves | ||||||||
| Height | 2.4m (7.9ft) | 2.8m (9.2ft) | 3.9m (12.7ft) | 4.8m (15.6ft) | 5.2m (17.0ft) | 5.3m (17.5ft) | 5.3m (17.5ft) | 5.2m (16.9ft) |
| Direction | 280° W | 280° W | 269° W | 268° W | 266° W | 268° W | 267° W | 270° W |
| Period | 12.6 sec. | 12.4 sec. | 21.9 sec. | 20.6 sec. | 19.9 sec. | 19.2 sec. | 18.8 sec. | 18.1 sec. |
| Significant height | 1.2m (3.9ft) | 1.3m (4.3ft) | 1.5m (4.9ft) | 1.7m (5.6ft) | 1.8m (5.9ft) | 2.1m (6.9ft) | 1.0m (3.3ft) | 1.1m (3.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) | 11°C (52°F) |
Sea weather on Friday 19 December 2025
On Friday 19 December 2025, the sun will rise at 09:06 and will set at 17:28 on the beach(es) of Sein island (Île-de-Sein). The outside temperature will be a high of 54°F t and a low of 50°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! Be careful, the sea will be generally rough with a wind speed of up to 26.1mph km/h (with gusts up to 35.4mph). Wave height will be up to 23.6ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | | |
| Outside temperature | 12°C (53°F) | 11°C (52°F) | 10°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 10°C (51°F) | 11°C (51°F) |
| Perceived temperature | 8°C (47°F) | 8°C (46°F) | 7°C (45°F) | 8°C (46°F) | 8°C (46°F) | 8°C (46°F) | 8°C (46°F) | 9°C (47°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 67% | 62% | 68% | 65% | 60% | 63% | 60% | 59% |
| Barometric pressure | 1010 hPa | 1014 hPa | 1016 hPa | 1019 hPa | 1021 hPa | 1021 hPa | 1021 hPa | 1022 hPa |
| Cloud cover | 72% | 71% | 87% | 85% | 73% | 49% | 35% | 28% |
| Heat index | 12°C (53°F) | 11°C (52°F) | 10°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 10°C (51°F) | 11°C (51°F) |
| Dew point | 6°C (43°F) | 4°C (39°F) | 5°C (40°F) | 4°C (40°F) | 3°C (38°F) | 4°C (39°F) | 3°C (37°F) | 3°C (38°F) |
| Wind | ||||||||
| Speed | 42km/h (26mph) | 33km/h (21mph) | 27km/h (17mph) | 21km/h (13mph) | 21km/h (13mph) | 23km/h (14mph) | 20km/h (13mph) | 18km/h (11mph) |
| Gusts | 57km/h (35mph) | 45km/h (28mph) | 36km/h (22mph) | 28km/h (18mph) | 31km/h (19mph) | 33km/h (21mph) | 31km/h (19mph) | 27km/h (17mph) |
| Direction | 281° WNW | 322° NW | 302° WNW | 284° WNW | 265° W | 263° W | 262° W | 257° WSW |
| Wind chill | 8°C (47°F) | 8°C (46°F) | 7°C (45°F) | 8°C (46°F) | 8°C (46°F) | 8°C (46°F) | 8°C (46°F) | 9°C (47°F) |
| Waves | ||||||||
| Height | 5.5m (18.1ft) | 6.9m (22.5ft) | 7.2m (23.5ft) | 7.0m (22.8ft) | 6.5m (21.3ft) | 5.9m (19.4ft) | 5.3m (17.4ft) | 4.8m (15.7ft) |
| Direction | 270° W | 260° W | 257° WSW | 256° WSW | 260° W | 263° W | 266° W | 269° W |
| Period | 17.6 sec. | 17.5 sec. | 17.5 sec. | 17.3 sec. | 16.5 sec. | 16.0 sec. | 15.8 sec. | 15.5 sec. |
| Significant height | 1.2m (3.9ft) | 0.9m (3ft) | 0.6m (2ft) | 0.4m (1.3ft) | 0.3m (1ft) | 0.4m (1.3ft) | 0.5m (1.6ft) | 0.5m (1.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 13°C (56°F) | 13°C (56°F) | 13°C (56°F) | 13°C (56°F) | 13°C (56°F) | 13°C (56°F) | 13°C (56°F) | 13°C (56°F) |
Sea weather on Saturday 20 December 2025
On Saturday 20 December 2025, the sun will rise at 09:06 and will set at 17:28 on the beach(es) of Sein island (Île-de-Sein). The outside temperature will be a high of 54°F t and a low of 47°F. Precipitation is in the forecast (0.1in throughout the day): choose the right time to go to the beach and dodge the raindrops. Be careful, the sea will be generally rough with a wind speed of up to 31.1mph km/h (with gusts up to 38.5mph). Wave height will be up to 14.1ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | |  | | | |
| Outside temperature | 11°C (52°F) | 11°C (53°F) | 12°C (53°F) | 12°C (53°F) | 12°C (53°F) | 11°C (52°F) | 11°C (51°F) | 9°C (48°F) |
| Perceived temperature | 9°C (48°F) | 9°C (47°F) | 8°C (47°F) | 8°C (47°F) | 8°C (46°F) | 7°C (45°F) | 7°C (44°F) | 5°C (42°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0.1in |
| Humidity | 61% | 64% | 67% | 67% | 73% | 82% | 87% | 85% |
| Barometric pressure | 1021 hPa | 1019 hPa | 1017 hPa | 1015 hPa | 1012 hPa | 1009 hPa | 1007 hPa | 1007 hPa |
| Cloud cover | 44% | 64% | 67% | 64% | 88% | 100% | 100% | 100% |
| Heat index | 11°C (52°F) | 11°C (53°F) | 12°C (53°F) | 12°C (53°F) | 12°C (53°F) | 11°C (52°F) | 11°C (51°F) | 9°C (48°F) |
| Dew point | 4°C (39°F) | 5°C (41°F) | 6°C (42°F) | 6°C (42°F) | 7°C (45°F) | 8°C (47°F) | 8°C (47°F) | 7°C (44°F) |
| Wind | ||||||||
| Speed | 20km/h (13mph) | 28km/h (17mph) | 35km/h (22mph) | 40km/h (25mph) | 45km/h (28mph) | 50km/h (31mph) | 36km/h (22mph) | 28km/h (17mph) |
| Gusts | 28km/h (17mph) | 37km/h (23mph) | 47km/h (29mph) | 54km/h (34mph) | 62km/h (38mph) | 59km/h (36mph) | 45km/h (28mph) | 37km/h (23mph) |
| Direction | 227° SW | 208° SSW | 208° SSW | 204° SSW | 198° SSW | 197° SSW | 226° SW | 297° WNW |
| Wind chill | 9°C (48°F) | 9°C (47°F) | 8°C (47°F) | 8°C (47°F) | 8°C (46°F) | 7°C (45°F) | 7°C (44°F) | 5°C (42°F) |
| Waves | ||||||||
| Height | 4.3m (14.1ft) | 3.9m (12.8ft) | 3.6m (11.8ft) | 3.4m (11.2ft) | 3.2m (10.5ft) | 3.0m (9.8ft) | 2.8m (9.2ft) | 2.6m (8.5ft) |
| Direction | 271° W | 274° W | 276° W | 277° W | 278° W | 278° W | 279° W | 279° W |
| Period | 14.9 sec. | 14.5 sec. | 14.3 sec. | 13.8 sec. | 13.5 sec. | 13.2 sec. | 13.0 sec. | 12.8 sec. |
| Significant height | 0.5m (1.6ft) | 0.7m (2.3ft) | 0.6m (2ft) | 0.3m (1ft) | 0.3m (1ft) | 0.5m (1.6ft) | 0.7m (2.3ft) | 1.0m (3.3ft) |
| Sea water temperature | ||||||||
| Water temperature | 13°C (56°F) | 13°C (56°F) | 13°C (56°F) | 13°C (56°F) | 13°C (56°F) | 13°C (56°F) | 13°C (56°F) | 13°C (56°F) |
Sea weather on Sunday 21 December 2025
On Sunday 21 December 2025, the sun will rise at 09:07 and will set at 17:29 on the beach(es) of Sein island (Île-de-Sein). The outside temperature will be a high of 52°F t and a low of 49°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 10.8ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | |  | | |
| Outside temperature | 9°C (48°F) | 10°C (49°F) | 11°C (51°F) | 11°C (51°F) | 10°C (50°F) | 10°C (50°F) | 10°C (50°F) | 10°C (50°F) |
| Perceived temperature | 6°C (42°F) | 6°C (44°F) | 8°C (46°F) | 8°C (46°F) | 7°C (45°F) | 7°C (45°F) | 7°C (44°F) | 7°C (45°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 75% | 71% | 63% | 64% | 72% | 73% | 64% | 65% |
| Barometric pressure | 1008 hPa | 1008 hPa | 1007 hPa | 1007 hPa | 1007 hPa | 1007 hPa | 1007 hPa | 1008 hPa |
| Cloud cover | 100% | 71% | 44% | 40% | 68% | 87% | 40% | 47% |
| Heat index | 9°C (48°F) | 10°C (49°F) | 11°C (51°F) | 11°C (51°F) | 10°C (50°F) | 10°C (50°F) | 10°C (50°F) | 10°C (50°F) |
| Dew point | 5°C (40°F) | 5°C (40°F) | 4°C (39°F) | 4°C (40°F) | 5°C (41°F) | 5°C (42°F) | 3°C (38°F) | 4°C (39°F) |
| Wind | ||||||||
| Speed | 24km/h (15mph) | 24km/h (15mph) | 27km/h (17mph) | 26km/h (16mph) | 22km/h (14mph) | 24km/h (15mph) | 24km/h (15mph) | 22km/h (13mph) |
| Gusts | 31km/h (19mph) | 32km/h (20mph) | 36km/h (23mph) | 35km/h (22mph) | 31km/h (19mph) | 34km/h (21mph) | 37km/h (23mph) | 32km/h (20mph) |
| Direction | 324° NW | 319° NW | 305° NW | 282° WNW | 284° WNW | 315° NW | 317° NW | 293° WNW |
| Wind chill | 6°C (42°F) | 6°C (44°F) | 8°C (46°F) | 8°C (46°F) | 7°C (45°F) | 7°C (45°F) | 7°C (44°F) | 7°C (45°F) |
| Waves | ||||||||
| Height | 2.6m (8.5ft) | 2.9m (9.5ft) | 3.1m (10.2ft) | 3.3m (10.8ft) | 3.2m (10.5ft) | 3.0m (9.8ft) | 2.9m (9.5ft) | 2.9m (9.5ft) |
| Direction | 279° W | 282° WNW | 284° WNW | 285° WNW | 286° WNW | 286° WNW | 285° WNW | 285° WNW |
| Period | 12.4 sec. | 12.0 sec. | 11.9 sec. | 11.9 sec. | 12.0 sec. | 11.8 sec. | 11.5 sec. | 11.4 sec. |
| Significant height | 1.0m (3.3ft) | 1.2m (3.9ft) | 1.2m (3.9ft) | 1.2m (3.9ft) | 1.0m (3.3ft) | 1.1m (3.6ft) | 1.1m (3.6ft) | 1.1m (3.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 13°C (56°F) | 13°C (56°F) | 13°C (56°F) | 13°C (56°F) | 13°C (56°F) | 13°C (56°F) | 13°C (56°F) | 13°C (56°F) |