Sea weather in Nantucket Island (Massachusetts) in the United States (USA) All the beach weather in Nantucket Island (Massachusetts)
All the essential weather information for enjoying the beach in Nantucket Island (Massachusetts) in the United States (USA), 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 Nantucket Island (Massachusetts) over the next 7 days?
Discover the best moment to go to the beach in Nantucket Island (Massachusetts) in the United States (USA) this week to enjoy the best weather and calmest sea possible. Our opinion is based on reliable sea weather forecasts in Nantucket Island (Massachusetts). 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 |
|---|---|---|---|---|
| Sunday 14 December 2025 | 32°F to 40°F | 28.6mph | not recommended | all the sea weather |
| Monday 15 December 2025 | 23°F to 32°F | 24.2mph | not recommended | all the sea weather |
| Tuesday 16 December 2025 | 34°F to 41°F | 23mph | discouraged | all the sea weather |
| Wednesday 17 December 2025 | 41°F to 47°F | 28mph | not recommended | all the sea weather |
| Thursday 18 December 2025 | 40°F to 47°F | 23.6mph | discouraged | all the sea weather |
| Friday 19 December 2025 | 34°F to 54°F | 36mph | not recommended | all the sea weather |
| Saturday 20 December 2025 | 31°F to 40°F | 16.8mph | not recommended | all the sea weather |
Sea Weather: Your daily and hourly sea weather in Nantucket Island (Massachusetts)
Sea weather on Sunday 14 December 2025
On Sunday 14 December 2025, the sun will rise at 06:59 and will set at 16:12 on the beach(es) of Nantucket Island (Massachusetts). The outside temperature will be a high of 40°F t and a low of 32°F. Precipitation is in the forecast (0.2in 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 28.6mph km/h (with gusts up to 37.9mph). Wave height will be up to 5.2ft 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) | 3°C (37°F) | 2°C (35°F) | 2°C (35°F) | 1°C (34°F) | 1°C (35°F) | 1°C (35°F) | 1°C (33°F) |
| Perceived temperature | -1°C (31°F) | -1°C (30°F) | -1°C (30°F) | -3°C (26°F) | -4°C (25°F) | -5°C (24°F) | -6°C (22°F) | -7°C (20°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 87% | 98% | 99% | 99% | 100% | 98% | 96% | 95% |
| Barometric pressure | 1015 hPa | 1015 hPa | 1013 hPa | 1012 hPa | 1009 hPa | 1008 hPa | 1008 hPa | 1008 hPa |
| Cloud cover | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% |
| Heat index | 4°C (40°F) | 3°C (37°F) | 2°C (35°F) | 2°C (35°F) | 1°C (34°F) | 1°C (35°F) | 1°C (35°F) | 1°C (33°F) |
| Dew point | 2°C (36°F) | 2°C (36°F) | 1°C (35°F) | 2°C (35°F) | 1°C (34°F) | 1°C (34°F) | 1°C (33°F) | 0°C (32°F) |
| Wind | ||||||||
| Speed | 30km/h (18mph) | 13km/h (8mph) | 9km/h (6mph) | 19km/h (12mph) | 21km/h (13mph) | 30km/h (19mph) | 41km/h (25mph) | 46km/h (29mph) |
| Gusts | 40km/h (25mph) | 18km/h (11mph) | 13km/h (8mph) | 26km/h (16mph) | 29km/h (18mph) | 42km/h (26mph) | 56km/h (35mph) | 61km/h (38mph) |
| Direction | 277° W | 310° NW | 343° NNW | 310° NW | 347° NNW | 347° NNW | 320° NW | 350° N |
| Wind chill | -1°C (31°F) | -1°C (30°F) | -1°C (30°F) | -3°C (26°F) | -4°C (25°F) | -5°C (24°F) | -6°C (22°F) | -7°C (20°F) |
| Waves | ||||||||
| Height | 1.3m (4.3ft) | 1.2m (3.9ft) | 1.0m (3.4ft) | 0.9m (3.0ft) | 0.8m (2.7ft) | 0.8m (2.5ft) | 0.9m (3.1ft) | 1.6m (5.2ft) |
| Direction | 215° SW | 213° SSW | 209° SSW | 211° SSW | 206° SSW | 201° SSW | 173° S | 310° NW |
| Period | 6.3 sec. | 6.4 sec. | 6.3 sec. | 6.4 sec. | 6.0 sec. | 5.9 sec. | 7.3 sec. | 7.7 sec. |
| Significant height | 0.6m (2ft) | 0.3m (1ft) | 0.4m (1.3ft) | 0.8m (2.6ft) | 1.2m (3.9ft) | 1.2m (3.9ft) | 1.5m (4.9ft) | 2.0m (6.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) |
Sea weather on Monday 15 December 2025
On Monday 15 December 2025, the sun will rise at 06:59 and will set at 16:12 on the beach(es) of Nantucket Island (Massachusetts). The outside temperature will be a high of 32°F t and a low of 23°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 34.2mph km/h (with gusts up to 44.7mph). Wave height will be up to 7.9ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | |  | |  | | | | |
| Outside temperature | -0°C (31°F) | -4°C (25°F) | -5°C (22°F) | -5°C (24°F) | -4°C (25°F) | -2°C (28°F) | -2°C (29°F) | -1°C (31°F) |
| Perceived temperature | -9°C (16°F) | -13°C (8°F) | -15°C (5°F) | -14°C (7°F) | -13°C (9°F) | -10°C (13°F) | -10°C (14°F) | -8°C (18°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 89% | 73% | 74% | 72% | 63% | 60% | 61% | 63% |
| Barometric pressure | 1008 hPa | 1012 hPa | 1015 hPa | 1018 hPa | 1017 hPa | 1018 hPa | 1019 hPa | 1019 hPa |
| Cloud cover | 100% | 52% | 90% | 41% | 4% | 27% | 83% | 78% |
| Heat index | -0°C (31°F) | -4°C (25°F) | -5°C (22°F) | -5°C (24°F) | -4°C (25°F) | -2°C (28°F) | -2°C (29°F) | -1°C (31°F) |
| Dew point | -2°C (29°F) | -8°C (18°F) | -9°C (15°F) | -9°C (16°F) | -10°C (14°F) | -9°C (16°F) | -8°C (17°F) | -7°C (20°F) |
| Wind | ||||||||
| Speed | 55km/h (34mph) | 49km/h (30mph) | 46km/h (29mph) | 41km/h (26mph) | 37km/h (23mph) | 41km/h (26mph) | 43km/h (27mph) | 39km/h (24mph) |
| Gusts | 72km/h (45mph) | 56km/h (35mph) | 53km/h (33mph) | 48km/h (30mph) | 55km/h (34mph) | 56km/h (35mph) | 56km/h (35mph) | 49km/h (30mph) |
| Direction | 350° N | 324° NW | 318° NW | 316° NW | 306° NW | 291° WNW | 297° WNW | 295° WNW |
| Wind chill | -9°C (16°F) | -13°C (8°F) | -15°C (5°F) | -14°C (7°F) | -13°C (9°F) | -10°C (13°F) | -10°C (14°F) | -8°C (18°F) |
| Waves | ||||||||
| Height | 2.4m (7.8ft) | 2.3m (7.6ft) | 2.0m (6.7ft) | 1.9m (6.2ft) | 1.6m (5.4ft) | 1.6m (5.4ft) | 1.7m (5.6ft) | 1.6m (5.1ft) |
| Direction | 3° N | 68° ENE | 108° ESE | 96° E | 89° E | 281° WNW | 270° W | 268° W |
| Period | 9.6 sec. | 9.5 sec. | 8.5 sec. | 8.4 sec. | 8.2 sec. | 7.9 sec. | 7.5 sec. | 7.2 sec. |
| Significant height | 2.2m (7.2ft) | 1.9m (6.2ft) | 1.6m (5.2ft) | 1.7m (5.6ft) | 1.5m (4.9ft) | 1.6m (5.2ft) | 1.7m (5.6ft) | 1.5m (4.9ft) |
| Sea water temperature | ||||||||
| Water temperature | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) |
Sea weather on Tuesday 16 December 2025
On Tuesday 16 December 2025, the sun will rise at 07:00 and will set at 16:12 on the beach(es) of Nantucket Island (Massachusetts). The outside temperature will be a high of 41°F t and a low of 34°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 32.3mph). Wave height will be up to 5.2ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | | |
| Outside temperature | 1°C (34°F) | 1°C (33°F) | 1°C (34°F) | 1°C (33°F) | 2°C (35°F) | 2°C (35°F) | 4°C (38°F) | 4°C (40°F) |
| Perceived temperature | -6°C (22°F) | -6°C (22°F) | -6°C (22°F) | -5°C (22°F) | -4°C (24°F) | -4°C (25°F) | -2°C (28°F) | -1°C (29°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 60% | 79% | 65% | 61% | 60% | 63% | 68% | 72% |
| Barometric pressure | 1019 hPa | 1020 hPa | 1021 hPa | 1022 hPa | 1022 hPa | 1021 hPa | 1021 hPa | 1020 hPa |
| Cloud cover | 29% | 100% | 100% | 40% | 40% | 13% | 72% | 89% |
| Heat index | 1°C (34°F) | 1°C (33°F) | 1°C (34°F) | 1°C (33°F) | 2°C (35°F) | 2°C (35°F) | 4°C (38°F) | 4°C (40°F) |
| Dew point | -6°C (21°F) | -3°C (27°F) | -5°C (23°F) | -6°C (22°F) | -5°C (22°F) | -4°C (24°F) | -2°C (29°F) | -0°C (32°F) |
| Wind | ||||||||
| Speed | 35km/h (22mph) | 29km/h (18mph) | 35km/h (22mph) | 30km/h (19mph) | 29km/h (18mph) | 28km/h (17mph) | 32km/h (20mph) | 37km/h (23mph) |
| Gusts | 45km/h (28mph) | 37km/h (23mph) | 46km/h (28mph) | 39km/h (24mph) | 41km/h (25mph) | 44km/h (27mph) | 47km/h (29mph) | 52km/h (33mph) |
| Direction | 288° WNW | 281° WNW | 283° WNW | 280° W | 266° W | 248° WSW | 241° WSW | 234° SW |
| Wind chill | -6°C (22°F) | -6°C (22°F) | -6°C (22°F) | -5°C (22°F) | -4°C (24°F) | -4°C (25°F) | -2°C (28°F) | -1°C (29°F) |
| Waves | ||||||||
| Height | 1.3m (4.4ft) | 1.2m (3.9ft) | 1.6m (5.2ft) | 1.3m (4.3ft) | 1.0m (3.4ft) | 0.9m (2.9ft) | 0.8m (2.7ft) | 0.9m (3.1ft) |
| Direction | 266° W | 252° WSW | 245° WSW | 233° SW | 237° WSW | 238° WSW | 237° WSW | 234° SW |
| Period | 6.9 sec. | 6.7 sec. | 10.9 sec. | 7.2 sec. | 6.9 sec. | 10.6 sec. | 10.4 sec. | 10.3 sec. |
| Significant height | 1.2m (3.9ft) | 1.1m (3.6ft) | 1.2m (3.9ft) | 0.6m (2ft) | 0.3m (1ft) | 0.7m (2.3ft) | 0.7m (2.3ft) | 1.0m (3.3ft) |
| Sea water temperature | ||||||||
| Water temperature | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) |
Sea weather on Wednesday 17 December 2025
On Wednesday 17 December 2025, the sun will rise at 07:01 and will set at 16:13 on the beach(es) of Nantucket Island (Massachusetts). The outside temperature will be a high of 47°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! Be careful, the sea will be generally rough with a wind speed of up to 31.7mph km/h (with gusts up to 35.4mph). Wave height will be up to 9.2ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | | |
| Outside temperature | 5°C (41°F) | 6°C (43°F) | 7°C (44°F) | 8°C (46°F) | 7°C (45°F) | 7°C (45°F) | 7°C (44°F) | 7°C (44°F) |
| Perceived temperature | -0°C (31°F) | 1°C (33°F) | 2°C (35°F) | 2°C (36°F) | 2°C (35°F) | 2°C (35°F) | 1°C (34°F) | 1°C (34°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 74% | 71% | 74% | 74% | 76% | 79% | 79% | 80% |
| Barometric pressure | 1019 hPa | 1018 hPa | 1016 hPa | 1015 hPa | 1012 hPa | 1011 hPa | 1012 hPa | 1014 hPa |
| Cloud cover | 64% | 16% | 2% | 3% | 12% | 30% | 18% | 100% |
| Heat index | 5°C (41°F) | 6°C (43°F) | 7°C (44°F) | 8°C (46°F) | 7°C (45°F) | 7°C (45°F) | 7°C (44°F) | 7°C (44°F) |
| Dew point | 1°C (34°F) | 1°C (34°F) | 3°C (37°F) | 3°C (38°F) | 3°C (38°F) | 4°C (39°F) | 3°C (38°F) | 3°C (38°F) |
| Wind | ||||||||
| Speed | 39km/h (24mph) | 39km/h (24mph) | 41km/h (26mph) | 46km/h (28mph) | 49km/h (31mph) | 51km/h (32mph) | 50km/h (31mph) | 45km/h (28mph) |
| Gusts | 43km/h (27mph) | 43km/h (27mph) | 42km/h (26mph) | 48km/h (30mph) | 50km/h (31mph) | 57km/h (35mph) | 50km/h (31mph) | 46km/h (29mph) |
| Direction | 234° SW | 231° SW | 230° SW | 222° SW | 226° SW | 233° SW | 246° WSW | 267° W |
| Wind chill | -0°C (31°F) | 1°C (33°F) | 2°C (35°F) | 2°C (36°F) | 2°C (35°F) | 2°C (35°F) | 1°C (34°F) | 1°C (34°F) |
| Waves | ||||||||
| Height | 1.2m (3.9ft) | 1.5m (4.8ft) | 1.7m (5.5ft) | 1.8m (6.0ft) | 2.0m (6.6ft) | 2.4m (7.9ft) | 2.6m (8.5ft) | 2.8m (9.2ft) |
| Direction | 233° SW | 233° SW | 227° SW | 221° SW | 220° SW | 217° SW | 217° SW | 224° SW |
| Period | 10.2 sec. | 10.0 sec. | 9.9 sec. | 9.8 sec. | 9.8 sec. | 9.8 sec. | 9.8 sec. | 9.8 sec. |
| Significant height | 1.2m (3.9ft) | 1.3m (4.3ft) | 1.3m (4.3ft) | 1.5m (4.9ft) | 1.6m (5.2ft) | 1.8m (5.9ft) | 1.9m (6.2ft) | 2.2m (7.2ft) |
| Sea water temperature | ||||||||
| Water temperature | 3°C (37°F) | 3°C (37°F) | 3°C (37°F) | 3°C (37°F) | 3°C (37°F) | 3°C (37°F) | 3°C (37°F) | 3°C (37°F) |
Sea weather on Thursday 18 December 2025
On Thursday 18 December 2025, the sun will rise at 07:01 and will set at 16:13 on the beach(es) of Nantucket Island (Massachusetts). The outside temperature will be a high of 47°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 23.6mph km/h (with gusts up to 26.1mph). Wave height will be up to 9.2ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition |  | | | | | | | |
| Outside temperature | 6°C (42°F) | 5°C (40°F) | 4°C (39°F) | 4°C (40°F) | 5°C (41°F) | 4°C (40°F) | 7°C (44°F) | 8°C (47°F) |
| Perceived temperature | 0°C (33°F) | 0°C (32°F) | 2°C (35°F) | 0°C (33°F) | 2°C (35°F) | -0°C (32°F) | 2°C (35°F) | 4°C (39°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 84% | 78% | 70% | 71% | 75% | 81% | 86% | 93% |
| Barometric pressure | 1018 hPa | 1022 hPa | 1024 hPa | 1025 hPa | 1025 hPa | 1023 hPa | 1020 hPa | 1017 hPa |
| Cloud cover | 0% | 19% | 20% | 31% | 100% | 3% | 33% | 100% |
| Heat index | 6°C (42°F) | 5°C (40°F) | 4°C (39°F) | 4°C (40°F) | 5°C (41°F) | 4°C (40°F) | 7°C (44°F) | 8°C (47°F) |
| Dew point | 3°C (37°F) | 1°C (34°F) | -1°C (30°F) | -1°C (31°F) | 1°C (33°F) | 1°C (34°F) | 4°C (40°F) | 7°C (45°F) |
| Wind | ||||||||
| Speed | 34km/h (21mph) | 26km/h (16mph) | 9km/h (6mph) | 18km/h (11mph) | 15km/h (9mph) | 24km/h (15mph) | 34km/h (21mph) | 38km/h (24mph) |
| Gusts | 40km/h (25mph) | 37km/h (23mph) | 13km/h (8mph) | 26km/h (16mph) | 23km/h (14mph) | 29km/h (18mph) | 39km/h (24mph) | 42km/h (26mph) |
| Direction | 282° WNW | 284° WNW | 328° NNW | 157° SSE | 142° SE | 148° SSE | 144° SE | 169° S |
| Wind chill | 0°C (33°F) | 0°C (32°F) | 2°C (35°F) | 0°C (33°F) | 2°C (35°F) | -0°C (32°F) | 2°C (35°F) | 4°C (39°F) |
| Waves | ||||||||
| Height | 2.8m (9.2ft) | 2.5m (8.2ft) | 1.9m (6.4ft) | 1.4m (4.7ft) | 1.2m (3.8ft) | 1.0m (3.3ft) | 1.0m (3.4ft) | 1.6m (5.4ft) |
| Direction | 230° SW | 221° SW | 221° SW | 216° SW | 215° SW | 208° SSW | 209° SSW | 179° S |
| Period | 9.8 sec. | 8.2 sec. | 8.5 sec. | 8.2 sec. | 7.9 sec. | 7.7 sec. | 7.5 sec. | 12.4 sec. |
| Significant height | 2.3m (7.5ft) | 1.8m (5.9ft) | 1.0m (3.3ft) | 0.7m (2.3ft) | 0.4m (1.3ft) | 1.1m (3.6ft) | 1.2m (3.9ft) | 1.6m (5.2ft) |
| Sea water temperature | ||||||||
| Water temperature | 3°C (37°F) | 3°C (37°F) | 3°C (37°F) | 3°C (37°F) | 3°C (37°F) | 3°C (37°F) | 3°C (37°F) | 3°C (37°F) |
Sea weather on Friday 19 December 2025
On Friday 19 December 2025, the sun will rise at 07:02 and will set at 16:13 on the beach(es) of Nantucket Island (Massachusetts). The outside temperature will be a high of 54°F t and a low of 34°F. Precipitation is in the forecast (0.2in 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 42.3mph km/h (with gusts up to 44.1mph). Wave height will be up to 9.8ft 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) | 9°C (49°F) | 11°C (51°F) | 11°C (52°F) | 9°C (47°F) | 6°C (44°F) | 5°C (41°F) | 2°C (36°F) |
| Perceived temperature | 4°C (40°F) | 5°C (41°F) | 6°C (43°F) | 7°C (44°F) | 4°C (38°F) | 1°C (34°F) | -1°C (29°F) | -6°C (21°F) |
| Precipitation | 0in | 0in | 0in | 0.1in | 0.1in | 0in | 0in | 0in |
| Humidity | 99% | 95% | 92% | 95% | 93% | 84% | 82% | 70% |
| Barometric pressure | 1013 hPa | 1010 hPa | 1005 hPa | 1000 hPa | 998 hPa | 1000 hPa | 1005 hPa | 1010 hPa |
| Cloud cover | 78% | 42% | 100% | 100% | 100% | 60% | 37% | 19% |
| Heat index | 9°C (48°F) | 9°C (49°F) | 11°C (51°F) | 11°C (52°F) | 9°C (47°F) | 6°C (44°F) | 5°C (41°F) | 2°C (36°F) |
| Dew point | 9°C (48°F) | 9°C (47°F) | 9°C (49°F) | 11°C (51°F) | 8°C (46°F) | 4°C (39°F) | 2°C (36°F) | -3°C (27°F) |
| Wind | ||||||||
| Speed | 38km/h (24mph) | 44km/h (27mph) | 57km/h (36mph) | 68km/h (42mph) | 53km/h (33mph) | 45km/h (28mph) | 51km/h (32mph) | 58km/h (36mph) |
| Gusts | 43km/h (27mph) | 48km/h (30mph) | 59km/h (36mph) | 71km/h (44mph) | 58km/h (36mph) | 51km/h (32mph) | 54km/h (33mph) | 71km/h (44mph) |
| Direction | 174° S | 182° S | 184° S | 185° S | 228° SW | 264° W | 282° WNW | 287° WNW |
| Wind chill | 4°C (40°F) | 5°C (41°F) | 6°C (43°F) | 7°C (44°F) | 4°C (38°F) | 1°C (34°F) | -1°C (29°F) | -6°C (21°F) |
| Waves | ||||||||
| Height | 1.9m (6.1ft) | 2.0m (6.7ft) | 2.3m (7.7ft) | 3.0m (9.8ft) | 2.8m (9.2ft) | 2.6m (8.5ft) | 2.7m (8.9ft) | 2.6m (8.5ft) |
| Direction | 184° S | 184° S | 189° S | 190° S | 196° SSW | 195° SSW | 194° SSW | 195° SSW |
| Period | 14.1 sec. | 14.6 sec. | 14.8 sec. | 14.9 sec. | 14.9 sec. | 14.8 sec. | 11.5 sec. | 9.7 sec. |
| Significant height | 1.6m (5.2ft) | 1.8m (5.9ft) | 2.1m (6.9ft) | 2.9m (9.5ft) | 1.9m (6.2ft) | 1.7m (5.6ft) | 2.2m (7.2ft) | 2.0m (6.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) |
Sea weather on Saturday 20 December 2025
On Saturday 20 December 2025, the sun will rise at 07:02 and will set at 16:14 on the beach(es) of Nantucket Island (Massachusetts). The outside temperature will be a high of 40°F t and a low of 31°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 36.7mph km/h (with gusts up to 44.7mph). Wave height will be up to 7.2ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | |  | | | | |
| Outside temperature | 0°C (33°F) | -0°C (31°F) | -1°C (31°F) | -1°C (30°F) | -1°C (30°F) | -1°C (31°F) | 0°C (32°F) | 3°C (37°F) |
| Perceived temperature | -8°C (17°F) | -9°C (17°F) | -9°C (17°F) | -8°C (18°F) | -6°C (21°F) | -3°C (26°F) | -3°C (26°F) | -3°C (27°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 62% | 57% | 51% | 47% | 40% | 36% | 45% | 58% |
| Barometric pressure | 1014 hPa | 1018 hPa | 1022 hPa | 1025 hPa | 1026 hPa | 1026 hPa | 1027 hPa | 1026 hPa |
| Cloud cover | 4% | 0% | 6% | 15% | 10% | 24% | 26% | 39% |
| Heat index | 0°C (33°F) | -0°C (31°F) | -1°C (31°F) | -1°C (30°F) | -1°C (30°F) | -1°C (31°F) | 0°C (32°F) | 3°C (37°F) |
| Dew point | -6°C (21°F) | -8°C (18°F) | -10°C (15°F) | -11°C (13°F) | -13°C (8°F) | -14°C (7°F) | -10°C (13°F) | -5°C (24°F) |
| Wind | ||||||||
| Speed | 59km/h (37mph) | 52km/h (32mph) | 42km/h (26mph) | 32km/h (20mph) | 17km/h (11mph) | 7km/h (4mph) | 13km/h (8mph) | 27km/h (17mph) |
| Gusts | 72km/h (45mph) | 62km/h (39mph) | 52km/h (32mph) | 40km/h (25mph) | 25km/h (15mph) | 12km/h (7mph) | 21km/h (13mph) | 40km/h (25mph) |
| Direction | 292° WNW | 290° WNW | 300° WNW | 322° NW | 314° NW | 247° WSW | 193° SSW | 188° S |
| Wind chill | -8°C (17°F) | -9°C (17°F) | -9°C (17°F) | -8°C (18°F) | -6°C (21°F) | -3°C (26°F) | -3°C (26°F) | -3°C (27°F) |
| Waves | ||||||||
| Height | 2.2m (7.2ft) | 1.8m (5.9ft) | 1.5m (4.9ft) | 1.3m (4.3ft) | 1.1m (3.6ft) | 1.0m (3.3ft) | 1.0m (3.3ft) | 1.2m (3.9ft) |
| Direction | 193° SSW | 193° SSW | 188° S | 181° S | 176° S | 175° S | 174° S | 171° S |
| Period | 9.5 sec. | 9.3 sec. | 9.1 sec. | 9.0 sec. | 8.8 sec. | 8.9 sec. | 6.8 sec. | 7.6 sec. |
| Significant height | 1.4m (4.6ft) | 1.0m (3.3ft) | 0.7m (2.3ft) | 0.4m (1.3ft) | 0.7m (2.3ft) | 0.9m (3ft) | 1.1m (3.6ft) | 1.3m (4.3ft) |
| Sea water temperature | ||||||||
| Water temperature | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) | 5°C (41°F) |