Sea weather in Portland in the United States (USA) All the beach weather in Portland
All the essential weather information for enjoying the beach in Portland 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 Portland over the next 7 days?
Discover the best moment to go to the beach in Portland 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 Portland. 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 | 50°F to 56°F | 13.1mph | discouraged | all the sea weather |
| Monday 15 December 2025 | 50°F to 56°F | 10.6mph | not recommended | all the sea weather |
| Tuesday 16 December 2025 | 49°F to 54°F | 37.3mph | not recommended | all the sea weather |
| Wednesday 17 December 2025 | 49°F to 49°F | 19.9mph | not recommended | all the sea weather |
| Thursday 18 December 2025 | 45°F to 56°F | 7.5mph | not recommended | all the sea weather |
| Friday 19 December 2025 | 47°F to 49°F | 14.3mph | discouraged | all the sea weather |
| Saturday 20 December 2025 | 45°F to 49°F | 10.6mph | discouraged | all the sea weather |
Sea Weather: Your daily and hourly sea weather in Portland
Sea weather on Sunday 14 December 2025
On Sunday 14 December 2025, the sun will rise at 07:44 and will set at 16:27 on the beach(es) of Portland. The outside temperature will be a high of 56°F t and a low of 50°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 17.4mph km/h (with gusts up to 26.1mph). Wave height will be up to 5.9ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition |  |  | |  |  | | | |
| Outside temperature | 11°C (53°F) | 11°C (52°F) | 10°C (51°F) | 11°C (52°F) | 11°C (52°F) | 12°C (53°F) | 12°C (53°F) | 12°C (53°F) |
| Perceived temperature | 10°C (49°F) | 9°C (48°F) | 8°C (46°F) | 8°C (46°F) | 8°C (47°F) | 10°C (49°F) | 10°C (49°F) | 10°C (49°F) |
| Precipitation | 0in | 0.1in | 0.1in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 73% | 78% | 92% | 89% | 87% | 85% | 83% | 80% |
| Barometric pressure | 1015 hPa | 1016 hPa | 1017 hPa | 1017 hPa | 1018 hPa | 1017 hPa | 1016 hPa | 1016 hPa |
| Cloud cover | 50% | 100% | 100% | 100% | 100% | 100% | 100% | 100% |
| Heat index | 11°C (53°F) | 11°C (52°F) | 10°C (51°F) | 11°C (52°F) | 11°C (52°F) | 12°C (53°F) | 12°C (53°F) | 12°C (53°F) |
| Dew point | 7°C (44°F) | 7°C (45°F) | 9°C (48°F) | 9°C (49°F) | 9°C (49°F) | 9°C (49°F) | 9°C (48°F) | 9°C (47°F) |
| Wind | ||||||||
| Speed | 14km/h (9mph) | 19km/h (12mph) | 19km/h (12mph) | 28km/h (17mph) | 27km/h (17mph) | 19km/h (12mph) | 17km/h (10mph) | 21km/h (13mph) |
| Gusts | 27km/h (17mph) | 32km/h (20mph) | 30km/h (18mph) | 42km/h (26mph) | 41km/h (26mph) | 33km/h (20mph) | 33km/h (21mph) | 24km/h (15mph) |
| Direction | 170° S | 155° SSE | 158° SSE | 168° SSE | 161° SSE | 171° S | 154° SSE | 155° SSE |
| Wind chill | 10°C (49°F) | 9°C (48°F) | 8°C (46°F) | 8°C (46°F) | 8°C (47°F) | 10°C (49°F) | 10°C (49°F) | 10°C (49°F) |
| Waves | ||||||||
| Height | 1.5m (4.8ft) | 1.6m (5.1ft) | 1.7m (5.7ft) | 1.8m (6.0ft) | 1.8m (5.9ft) | 1.7m (5.6ft) | 1.6m (5.4ft) | 1.6m (5.4ft) |
| Direction | 255° WSW | 253° WSW | 254° WSW | 253° WSW | 251° WSW | 251° WSW | 249° WSW | 249° WSW |
| Period | 11.9 sec. | 11.6 sec. | 11.3 sec. | 10.9 sec. | 10.7 sec. | 10.4 sec. | 10.2 sec. | 10.0 sec. |
| Significant height | 0.6m (2ft) | 0.7m (2.3ft) | 0.8m (2.6ft) | 0.9m (3ft) | 0.7m (2.3ft) | 0.5m (1.6ft) | 0.5m (1.6ft) | 0.7m (2.3ft) |
| Sea water temperature | ||||||||
| Water temperature | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) |
Sea weather on Monday 15 December 2025
On Monday 15 December 2025, the sun will rise at 07:45 and will set at 16:28 on the beach(es) of Portland. The outside temperature will be a high of 56°F t and a low of 50°F. Precipitation is in the forecast (0.4in 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 35.4mph km/h (with gusts up to 39.2mph). 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) | 12°C (54°F) | 13°C (55°F) | 13°C (55°F) | 12°C (54°F) | 12°C (54°F) | 11°C (51°F) | 11°C (51°F) |
| Perceived temperature | 10°C (51°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 8°C (47°F) | 9°C (48°F) | 8°C (47°F) | 8°C (47°F) |
| Precipitation | 0in | 0.1in | 0.1in | 0.1in | 0in | 0in | 0in | 0in |
| Humidity | 77% | 92% | 92% | 95% | 96% | 85% | 82% | 81% |
| Barometric pressure | 1014 hPa | 1013 hPa | 1012 hPa | 1013 hPa | 1015 hPa | 1017 hPa | 1019 hPa | 1021 hPa |
| Cloud cover | 100% | 100% | 100% | 100% | 100% | 51% | 100% | 84% |
| Heat index | 13°C (56°F) | 12°C (54°F) | 13°C (55°F) | 13°C (55°F) | 12°C (54°F) | 12°C (54°F) | 11°C (51°F) | 11°C (51°F) |
| Dew point | 9°C (48°F) | 11°C (52°F) | 11°C (53°F) | 12°C (53°F) | 12°C (53°F) | 10°C (49°F) | 8°C (46°F) | 7°C (45°F) |
| Wind | ||||||||
| Speed | 36km/h (22mph) | 46km/h (28mph) | 51km/h (32mph) | 56km/h (35mph) | 57km/h (36mph) | 37km/h (23mph) | 22km/h (14mph) | 17km/h (11mph) |
| Gusts | 42km/h (26mph) | 52km/h (32mph) | 57km/h (36mph) | 63km/h (39mph) | 62km/h (39mph) | 42km/h (26mph) | 35km/h (22mph) | 26km/h (16mph) |
| Direction | 171° S | 182° S | 184° S | 195° SSW | 198° SSW | 244° WSW | 258° WSW | 249° WSW |
| Wind chill | 10°C (51°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 8°C (47°F) | 9°C (48°F) | 8°C (47°F) | 8°C (47°F) |
| Waves | ||||||||
| Height | 1.8m (6.0ft) | 2.2m (7.3ft) | 3.0m (9.8ft) | 3.3m (10.9ft) | 3.7m (12.1ft) | 3.6m (12.0ft) | 3.7m (12.0ft) | 3.5m (11.4ft) |
| Direction | 249° WSW | 242° WSW | 234° SW | 238° WSW | 245° WSW | 259° W | 261° W | 260° W |
| Period | 9.5 sec. | 12.1 sec. | 18.0 sec. | 17.8 sec. | 11.2 sec. | 11.2 sec. | 12.0 sec. | 12.1 sec. |
| Significant height | 1.1m (3.6ft) | 1.7m (5.6ft) | 2.2m (7.2ft) | 2.2m (7.2ft) | 2.2m (7.2ft) | 1.0m (3.3ft) | 1.0m (3.3ft) | 0.6m (2ft) |
| Sea water temperature | ||||||||
| Water temperature | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) |
Sea weather on Tuesday 16 December 2025
On Tuesday 16 December 2025, the sun will rise at 07:45 and will set at 16:28 on the beach(es) of Portland. The outside temperature will be a high of 54°F t and a low of 49°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 37.3mph km/h (with gusts up to 40.4mph). Wave height will be up to 13.5ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | | |
| Outside temperature | 11°C (51°F) | 10°C (50°F) | 11°C (52°F) | 12°C (53°F) | 12°C (53°F) | 12°C (53°F) | 11°C (52°F) | 12°C (54°F) |
| Perceived temperature | 9°C (48°F) | 7°C (44°F) | 8°C (46°F) | 8°C (47°F) | 8°C (47°F) | 8°C (47°F) | 7°C (45°F) | 8°C (46°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0.1in | 0.1in |
| Humidity | 84% | 87% | 92% | 94% | 96% | 95% | 96% | 97% |
| Barometric pressure | 1021 hPa | 1020 hPa | 1017 hPa | 1016 hPa | 1015 hPa | 1012 hPa | 1008 hPa | 1001 hPa |
| Cloud cover | 65% | 100% | 100% | 89% | 96% | 100% | 100% | 100% |
| Heat index | 11°C (51°F) | 10°C (50°F) | 11°C (52°F) | 12°C (53°F) | 12°C (53°F) | 12°C (53°F) | 11°C (52°F) | 12°C (54°F) |
| Dew point | 8°C (46°F) | 8°C (46°F) | 10°C (50°F) | 11°C (52°F) | 11°C (52°F) | 11°C (51°F) | 11°C (51°F) | 12°C (53°F) |
| Wind | ||||||||
| Speed | 14km/h (9mph) | 22km/h (14mph) | 33km/h (20mph) | 41km/h (25mph) | 37km/h (23mph) | 37km/h (23mph) | 45km/h (28mph) | 60km/h (37mph) |
| Gusts | 21km/h (13mph) | 32km/h (20mph) | 50km/h (31mph) | 42km/h (26mph) | 40km/h (25mph) | 44km/h (27mph) | 52km/h (32mph) | 65km/h (41mph) |
| Direction | 193° SSW | 173° S | 182° S | 198° SSW | 195° SSW | 187° S | 191° S | 197° SSW |
| Wind chill | 9°C (48°F) | 7°C (44°F) | 8°C (46°F) | 8°C (47°F) | 8°C (47°F) | 8°C (47°F) | 7°C (45°F) | 8°C (46°F) |
| Waves | ||||||||
| Height | 3.2m (10.7ft) | 3.0m (9.8ft) | 2.8m (9.1ft) | 2.8m (9.3ft) | 2.7m (9.0ft) | 2.9m (9.4ft) | 3.0m (9.9ft) | 4.1m (13.5ft) |
| Direction | 259° WSW | 257° WSW | 255° WSW | 253° WSW | 252° WSW | 251° WSW | 252° WSW | 237° WSW |
| Period | 12.1 sec. | 12.1 sec. | 12.0 sec. | 11.9 sec. | 11.5 sec. | 9.9 sec. | 9.8 sec. | 9.7 sec. |
| Significant height | 0.6m (2ft) | 0.6m (2ft) | 1.0m (3.3ft) | 1.4m (4.6ft) | 1.4m (4.6ft) | 1.8m (5.9ft) | 2.5m (8.2ft) | 3.0m (9.8ft) |
| Sea water temperature | ||||||||
| Water temperature | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) |
Sea weather on Wednesday 17 December 2025
On Wednesday 17 December 2025, the sun will rise at 07:46 and will set at 16:28 on the beach(es) of Portland. The outside temperature will be a high of 49°F t and a low of 49°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 36.7mph km/h (with gusts up to 46mph). Wave height will be up to 16.1ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | | |
| Outside temperature | 9°C (47°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (49°F) | 9°C (49°F) |
| Perceived temperature | 3°C (37°F) | 4°C (40°F) | 4°C (40°F) | 5°C (41°F) | 5°C (41°F) | 5°C (42°F) | 6°C (43°F) | 6°C (42°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 88% | 75% | 62% | 68% | 67% | 72% | 72% | 78% |
| Barometric pressure | 1005 hPa | 1010 hPa | 1014 hPa | 1018 hPa | 1019 hPa | 1020 hPa | 1019 hPa | 1018 hPa |
| Cloud cover | 100% | 96% | 75% | 100% | 100% | 95% | 100% | 100% |
| Heat index | 9°C (47°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (49°F) | 9°C (49°F) |
| Dew point | 7°C (44°F) | 5°C (41°F) | 2°C (36°F) | 3°C (38°F) | 3°C (38°F) | 4°C (40°F) | 4°C (40°F) | 6°C (42°F) |
| Wind | ||||||||
| Speed | 59km/h (37mph) | 48km/h (30mph) | 44km/h (27mph) | 37km/h (23mph) | 32km/h (20mph) | 30km/h (18mph) | 26km/h (16mph) | 32km/h (20mph) |
| Gusts | 74km/h (46mph) | 65km/h (40mph) | 51km/h (32mph) | 43km/h (27mph) | 47km/h (29mph) | 45km/h (28mph) | 40km/h (25mph) | 47km/h (29mph) |
| Direction | 283° WNW | 287° WNW | 278° W | 264° W | 250° WSW | 234° SW | 212° SSW | 194° SSW |
| Wind chill | 3°C (37°F) | 4°C (40°F) | 4°C (40°F) | 5°C (41°F) | 5°C (41°F) | 5°C (42°F) | 6°C (43°F) | 6°C (42°F) |
| Waves | ||||||||
| Height | 4.9m (16.1ft) | 4.8m (15.8ft) | 4.8m (15.7ft) | 4.6m (15.2ft) | 4.4m (14.4ft) | 4.2m (13.9ft) | 4.0m (13.1ft) | 3.7m (12.3ft) |
| Direction | 253° WSW | 259° W | 263° W | 266° W | 267° W | 266° W | 265° W | 265° W |
| Period | 10.7 sec. | 11.0 sec. | 11.2 sec. | 11.5 sec. | 11.5 sec. | 11.5 sec. | 11.5 sec. | 11.8 sec. |
| Significant height | 2.2m (7.2ft) | 2.1m (6.9ft) | 1.9m (6.2ft) | 1.6m (5.2ft) | 1.6m (5.2ft) | 1.5m (4.9ft) | 1.2m (3.9ft) | 1.2m (3.9ft) |
| 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 07:47 and will set at 16:28 on the beach(es) of Portland. The outside temperature will be a high of 56°F t and a low of 45°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 30.5mph km/h (with gusts up to 32.3mph). Wave height will be up to 13.1ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | | |
| Outside temperature | 8°C (47°F) | 7°C (45°F) | 7°C (45°F) | 13°C (55°F) | 11°C (52°F) | 10°C (50°F) | 9°C (49°F) | 9°C (47°F) |
| Perceived temperature | 5°C (41°F) | 4°C (38°F) | 3°C (37°F) | 9°C (48°F) | 8°C (47°F) | 8°C (46°F) | 7°C (45°F) | 7°C (44°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0.1in | 0.1in | 0in |
| Humidity | 84% | 85% | 87% | 96% | 85% | 90% | 91% | 88% |
| Barometric pressure | 1015 hPa | 1011 hPa | 1005 hPa | 1002 hPa | 1006 hPa | 1006 hPa | 1006 hPa | 1005 hPa |
| Cloud cover | 100% | 100% | 100% | 100% | 82% | 100% | 100% | 100% |
| Heat index | 8°C (47°F) | 7°C (45°F) | 7°C (45°F) | 13°C (55°F) | 11°C (52°F) | 10°C (50°F) | 9°C (49°F) | 9°C (47°F) |
| Dew point | 6°C (42°F) | 5°C (41°F) | 5°C (41°F) | 12°C (53°F) | 9°C (48°F) | 8°C (47°F) | 8°C (46°F) | 7°C (44°F) |
| Wind | ||||||||
| Speed | 23km/h (15mph) | 22km/h (14mph) | 29km/h (18mph) | 49km/h (31mph) | 25km/h (16mph) | 16km/h (10mph) | 13km/h (8mph) | 12km/h (7mph) |
| Gusts | 33km/h (20mph) | 29km/h (18mph) | 42km/h (26mph) | 52km/h (32mph) | 39km/h (24mph) | 24km/h (15mph) | 19km/h (12mph) | 17km/h (11mph) |
| Direction | 156° SSE | 138° SE | 136° SE | 214° SW | 251° WSW | 251° WSW | 301° WNW | 354° N |
| Wind chill | 5°C (41°F) | 4°C (38°F) | 3°C (37°F) | 9°C (48°F) | 8°C (47°F) | 8°C (46°F) | 7°C (45°F) | 7°C (44°F) |
| Waves | ||||||||
| Height | 3.6m (11.7ft) | 3.4m (11.3ft) | 3.1m (10.1ft) | 3.2m (10.5ft) | 4.0m (13.0ft) | 3.5m (11.4ft) | 4.0m (13.3ft) | 3.9m (12.8ft) |
| Direction | 266° W | 267° W | 269° W | 270° W | 256° WSW | 261° W | 269° W | 273° W |
| Period | 11.8 sec. | 11.7 sec. | 11.5 sec. | 10.9 sec. | 10.5 sec. | 10.8 sec. | 10.4 sec. | 10.5 sec. |
| Significant height | 1.6m (5.2ft) | 1.3m (4.3ft) | 1.0m (3.3ft) | 2.4m (7.9ft) | 1.4m (4.6ft) | 0.9m (3ft) | 0.9m (3ft) | 0.6m (2ft) |
| Sea water temperature | ||||||||
| Water temperature | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) |
Sea weather on Friday 19 December 2025
On Friday 19 December 2025, the sun will rise at 07:47 and will set at 16:29 on the beach(es) of Portland. The outside temperature will be a high of 49°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. The sea will be generally calm, with a wind speed of up to 16.8mph km/h (with gusts up to 26.7mph). 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 | 9°C (47°F) | 9°C (49°F) | 9°C (48°F) | 9°C (47°F) | 8°C (47°F) | 8°C (47°F) | 8°C (46°F) | 8°C (47°F) |
| Perceived temperature | 7°C (45°F) | 7°C (44°F) | 6°C (42°F) | 5°C (42°F) | 5°C (41°F) | 5°C (40°F) | 4°C (40°F) | 5°C (40°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 84% | 74% | 73% | 70% | 69% | 63% | 66% | 66% |
| Barometric pressure | 1006 hPa | 1006 hPa | 1005 hPa | 1007 hPa | 1008 hPa | 1009 hPa | 1012 hPa | 1014 hPa |
| Cloud cover | 100% | 100% | 98% | 99% | 73% | 42% | 46% | 31% |
| Heat index | 9°C (47°F) | 9°C (49°F) | 9°C (48°F) | 9°C (47°F) | 8°C (47°F) | 8°C (47°F) | 8°C (46°F) | 8°C (47°F) |
| Dew point | 6°C (43°F) | 5°C (41°F) | 4°C (39°F) | 3°C (38°F) | 3°C (37°F) | 2°C (35°F) | 2°C (36°F) | 2°C (36°F) |
| Wind | ||||||||
| Speed | 7km/h (4mph) | 17km/h (11mph) | 21km/h (13mph) | 21km/h (13mph) | 23km/h (14mph) | 26km/h (16mph) | 27km/h (17mph) | 23km/h (15mph) |
| Gusts | 10km/h (6mph) | 24km/h (15mph) | 30km/h (18mph) | 30km/h (19mph) | 33km/h (21mph) | 40km/h (25mph) | 43km/h (27mph) | 38km/h (24mph) |
| Direction | 278° W | 296° WNW | 283° WNW | 282° WNW | 289° WNW | 288° WNW | 285° WNW | 277° W |
| Wind chill | 7°C (45°F) | 7°C (44°F) | 6°C (42°F) | 5°C (42°F) | 5°C (41°F) | 5°C (40°F) | 4°C (40°F) | 5°C (40°F) |
| Waves | ||||||||
| Height | 3.7m (12.0ft) | 3.5m (11.3ft) | 3.3m (10.8ft) | 3.3m (10.8ft) | 3.3m (10.8ft) | 3.2m (10.5ft) | 3.0m (9.8ft) | 2.8m (9.2ft) |
| Direction | 275° W | 275° W | 275° W | 277° W | 287° WNW | 293° WNW | 293° WNW | 294° WNW |
| Period | 10.5 sec. | 10.4 sec. | 10.7 sec. | 11.5 sec. | 11.8 sec. | 11.8 sec. | 11.6 sec. | 11.3 sec. |
| Significant height | 0.6m (2ft) | 0.7m (2.3ft) | 0.7m (2.3ft) | 0.7m (2.3ft) | 0.6m (2ft) | 0.5m (1.6ft) | 0.5m (1.6ft) | 0.5m (1.6ft) |
| 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 Saturday 20 December 2025
On Saturday 20 December 2025, the sun will rise at 07:48 and will set at 16:29 on the beach(es) of Portland. The outside temperature will be a high of 49°F t and a low of 45°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 16.2mph km/h (with gusts up to 24.9mph). 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 | 9°C (48°F) | 9°C (47°F) | 8°C (47°F) | 9°C (47°F) | 9°C (48°F) | 9°C (48°F) | 8°C (47°F) | 8°C (46°F) |
| Perceived temperature | 5°C (42°F) | 5°C (42°F) | 5°C (42°F) | 6°C (42°F) | 6°C (43°F) | 6°C (43°F) | 5°C (42°F) | 5°C (40°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 61% | 68% | 73% | 71% | 67% | 70% | 75% | 80% |
| Barometric pressure | 1015 hPa | 1017 hPa | 1018 hPa | 1019 hPa | 1019 hPa | 1018 hPa | 1017 hPa | 1017 hPa |
| Cloud cover | 34% | 49% | 68% | 61% | 41% | 46% | 56% | 60% |
| Heat index | 9°C (48°F) | 9°C (47°F) | 8°C (47°F) | 9°C (47°F) | 9°C (48°F) | 9°C (48°F) | 8°C (47°F) | 8°C (46°F) |
| Dew point | 2°C (35°F) | 3°C (37°F) | 4°C (39°F) | 4°C (39°F) | 3°C (38°F) | 4°C (39°F) | 4°C (40°F) | 4°C (40°F) |
| Wind | ||||||||
| Speed | 26km/h (16mph) | 22km/h (14mph) | 18km/h (11mph) | 21km/h (13mph) | 20km/h (12mph) | 19km/h (12mph) | 19km/h (12mph) | 17km/h (11mph) |
| Gusts | 40km/h (25mph) | 32km/h (20mph) | 27km/h (17mph) | 32km/h (20mph) | 31km/h (19mph) | 30km/h (18mph) | 31km/h (19mph) | 28km/h (17mph) |
| Direction | 266° W | 264° W | 260° W | 249° WSW | 243° WSW | 221° SW | 188° S | 152° SSE |
| Wind chill | 5°C (42°F) | 5°C (42°F) | 5°C (42°F) | 6°C (42°F) | 6°C (43°F) | 6°C (43°F) | 5°C (42°F) | 5°C (40°F) |
| Waves | ||||||||
| Height | 2.7m (8.9ft) | 2.6m (8.5ft) | 2.5m (8.2ft) | 2.4m (7.9ft) | 2.3m (7.5ft) | 2.2m (7.2ft) | 2.2m (7.2ft) | 2.2m (7.2ft) |
| Direction | 295° WNW | 295° WNW | 294° WNW | 293° WNW | 289° WNW | 288° WNW | 290° WNW | 293° WNW |
| Period | 11.1 sec. | 10.9 sec. | 10.6 sec. | 10.3 sec. | 10.1 sec. | 9.9 sec. | 9.8 sec. | 9.8 sec. |
| Significant height | 0.7m (2.3ft) | 0.8m (2.6ft) | 0.7m (2.3ft) | 0.8m (2.6ft) | 0.8m (2.6ft) | 0.7m (2.3ft) | 0.6m (2ft) | 0.6m (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) |