Sea weather in Dehiwala-Mount Lavinia in Sri Lanka All the beach weather in Dehiwala-Mount Lavinia
All the essential weather information for enjoying the beach in Dehiwala-Mount Lavinia in Sri Lanka, 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 Dehiwala-Mount Lavinia over the next 7 days?
Discover the best moment to go to the beach in Dehiwala-Mount Lavinia in Sri Lanka this week to enjoy the best weather and calmest sea possible. Our opinion is based on reliable sea weather forecasts in Dehiwala-Mount Lavinia. 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 | 74°F to 81°F | 20.5mph | discouraged | all the sea weather |
| Tuesday 16 December 2025 | 76°F to 81°F | 8.7mph | discouraged | all the sea weather |
| Wednesday 17 December 2025 | 77°F to 81°F | 8.1mph | recommended | all the sea weather |
| Thursday 18 December 2025 | 77°F to 83°F | 16.8mph | discouraged | all the sea weather |
| Friday 19 December 2025 | 76°F to 83°F | 13.7mph | discouraged | all the sea weather |
| Saturday 20 December 2025 | 76°F to 81°F | 16.2mph | discouraged | all the sea weather |
| Sunday 21 December 2025 | 76°F to 81°F | 14.3mph | discouraged | all the sea weather |
Sea Weather: Your daily and hourly sea weather in Dehiwala-Mount Lavinia
Sea weather on Monday 15 December 2025
On Monday 15 December 2025, the sun will rise at 06:14 and will set at 17:58 on the beach(es) of Dehiwala-Mount Lavinia. The outside temperature will be a high of 81°F t and a low of 74°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 24.2mph km/h (with gusts up to 29.8mph). Wave height will be up to 4.6ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition |  | |  | |  | | | |
| Outside temperature | 24°C (76°F) | 24°C (75°F) | 24°C (75°F) | 26°C (78°F) | 24°C (75°F) | 25°C (78°F) | 26°C (78°F) | 26°C (79°F) |
| Perceived temperature | 27°C (80°F) | 26°C (79°F) | 26°C (78°F) | 28°C (82°F) | 26°C (78°F) | 27°C (81°F) | 28°C (83°F) | 28°C (83°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 84% | 84% | 84% | 76% | 69% | 74% | 79% | 80% |
| Barometric pressure | 1011 hPa | 1010 hPa | 1011 hPa | 1013 hPa | 1010 hPa | 1008 hPa | 1009 hPa | 1012 hPa |
| Cloud cover | 32% | 22% | 1% | 3% | 0% | 6% | 8% | 18% |
| Heat index | 27°C (80°F) | 26°C (79°F) | 26°C (78°F) | 28°C (82°F) | 26°C (78°F) | 27°C (81°F) | 28°C (83°F) | 28°C (83°F) |
| Dew point | 21°C (71°F) | 21°C (70°F) | 21°C (69°F) | 21°C (70°F) | 18°C (64°F) | 20°C (69°F) | 22°C (72°F) | 22°C (72°F) |
| Wind | ||||||||
| Speed | 28km/h (17mph) | 28km/h (17mph) | 27km/h (17mph) | 28km/h (17mph) | 30km/h (18mph) | 39km/h (24mph) | 34km/h (21mph) | 33km/h (21mph) |
| Gusts | 38km/h (24mph) | 38km/h (24mph) | 38km/h (23mph) | 36km/h (22mph) | 31km/h (19mph) | 42km/h (26mph) | 39km/h (24mph) | 48km/h (30mph) |
| Direction | 23° NNE | 23° NNE | 20° NNE | 15° NNE | 344° NNW | 334° NNW | 350° N | 18° NNE |
| Wind chill | 24°C (76°F) | 24°C (75°F) | 24°C (75°F) | 26°C (78°F) | 24°C (75°F) | 25°C (78°F) | 26°C (78°F) | 26°C (79°F) |
| Waves | ||||||||
| Height | 1.0m (3.2ft) | 0.9m (3.1ft) | 0.9m (3.0ft) | 0.9m (3.1ft) | 0.9m (3.1ft) | 1.4m (4.5ft) | 1.4m (4.7ft) | 1.2m (4.0ft) |
| Direction | 300° WNW | 305° NW | 306° NW | 306° NW | 305° NW | 328° NNW | 320° NW | 303° WNW |
| Period | 10.1 sec. | 11.6 sec. | 13.8 sec. | 13.7 sec. | 13.6 sec. | 13.5 sec. | 13.2 sec. | 12.8 sec. |
| Significant height | 0.9m (3ft) | 0.9m (3ft) | 0.9m (3ft) | 1.0m (3.3ft) | 0.9m (3ft) | 1.5m (4.9ft) | 1.3m (4.3ft) | 1.1m (3.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) |
Sea weather on Tuesday 16 December 2025
On Tuesday 16 December 2025, the sun will rise at 06:15 and will set at 17:59 on the beach(es) of Dehiwala-Mount Lavinia. The outside temperature will be a high of 81°F t and a low of 76°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 19.3mph km/h (with gusts up to 26.1mph). Wave height will be up to 3.6ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | |  | |  | |
| Outside temperature | 25°C (77°F) | 24°C (76°F) | 24°C (76°F) | 26°C (79°F) | 27°C (81°F) | 27°C (80°F) | 27°C (80°F) | 26°C (79°F) |
| Perceived temperature | 27°C (81°F) | 27°C (80°F) | 27°C (80°F) | 29°C (84°F) | 30°C (86°F) | 30°C (86°F) | 30°C (86°F) | 29°C (85°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 84% | 86% | 88% | 80% | 75% | 80% | 84% | 85% |
| Barometric pressure | 1011 hPa | 1009 hPa | 1011 hPa | 1012 hPa | 1010 hPa | 1008 hPa | 1010 hPa | 1011 hPa |
| Cloud cover | 11% | 38% | 21% | 46% | 77% | 88% | 76% | 75% |
| Heat index | 27°C (81°F) | 27°C (80°F) | 27°C (80°F) | 29°C (84°F) | 30°C (86°F) | 30°C (86°F) | 30°C (86°F) | 29°C (85°F) |
| Dew point | 22°C (72°F) | 22°C (71°F) | 22°C (72°F) | 22°C (72°F) | 22°C (72°F) | 23°C (74°F) | 24°C (75°F) | 23°C (74°F) |
| Wind | ||||||||
| Speed | 31km/h (19mph) | 25km/h (16mph) | 25km/h (15mph) | 25km/h (15mph) | 25km/h (15mph) | 30km/h (18mph) | 26km/h (16mph) | 14km/h (9mph) |
| Gusts | 42km/h (26mph) | 36km/h (22mph) | 35km/h (22mph) | 32km/h (20mph) | 36km/h (22mph) | 42km/h (26mph) | 39km/h (24mph) | 22km/h (14mph) |
| Direction | 29° NNE | 23° NNE | 23° NNE | 20° NNE | 348° NNW | 338° NNW | 355° N | 29° NNE |
| Wind chill | 25°C (77°F) | 24°C (76°F) | 24°C (76°F) | 26°C (79°F) | 27°C (81°F) | 27°C (80°F) | 27°C (80°F) | 26°C (79°F) |
| Waves | ||||||||
| Height | 1.0m (3.3ft) | 0.9m (3.0ft) | 0.8m (2.7ft) | 0.9m (2.9ft) | 0.8m (2.7ft) | 1.1m (3.5ft) | 1.0m (3.3ft) | 0.8m (2.8ft) |
| Direction | 302° WNW | 229° SW | 228° SW | 228° SW | 228° SW | 229° SW | 229° SW | 228° SW |
| Period | 12.7 sec. | 12.6 sec. | 12.5 sec. | 12.2 sec. | 12.0 sec. | 15.9 sec. | 15.8 sec. | 5.8 sec. |
| Significant height | 0.9m (3ft) | 0.9m (3ft) | 0.9m (3ft) | 1.0m (3.3ft) | 0.8m (2.6ft) | 1.3m (4.3ft) | 0.8m (2.6ft) | 0.8m (2.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) |
Sea weather on Wednesday 17 December 2025
On Wednesday 17 December 2025, the sun will rise at 06:15 and will set at 17:59 on the beach(es) of Dehiwala-Mount Lavinia. The outside temperature will be a high of 81°F t and a low of 77°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 19.3mph). Wave height will be up to 2.6ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | | |
| Outside temperature | 26°C (78°F) | 26°C (78°F) | 25°C (77°F) | 26°C (79°F) | 26°C (79°F) | 27°C (81°F) | 27°C (81°F) | 26°C (79°F) |
| Perceived temperature | 28°C (83°F) | 28°C (83°F) | 28°C (82°F) | 29°C (85°F) | 29°C (84°F) | 31°C (87°F) | 31°C (87°F) | 29°C (84°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 86% | 85% | 88% | 82% | 78% | 81% | 81% | 84% |
| Barometric pressure | 1010 hPa | 1009 hPa | 1011 hPa | 1012 hPa | 1010 hPa | 1008 hPa | 1010 hPa | 1012 hPa |
| Cloud cover | 85% | 73% | 65% | 33% | 72% | 83% | 75% | 72% |
| Heat index | 28°C (83°F) | 28°C (83°F) | 28°C (82°F) | 29°C (85°F) | 29°C (84°F) | 31°C (87°F) | 31°C (87°F) | 29°C (84°F) |
| Dew point | 23°C (74°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) | 22°C (72°F) | 23°C (74°F) | 24°C (75°F) | 23°C (74°F) |
| Wind | ||||||||
| Speed | 10km/h (6mph) | 11km/h (7mph) | 9km/h (6mph) | 11km/h (7mph) | 15km/h (9mph) | 19km/h (12mph) | 13km/h (8mph) | 13km/h (8mph) |
| Gusts | 15km/h (9mph) | 16km/h (10mph) | 14km/h (9mph) | 15km/h (9mph) | 23km/h (14mph) | 31km/h (19mph) | 22km/h (14mph) | 20km/h (13mph) |
| Direction | 105° ESE | 130° SE | 46° NE | 345° NNW | 321° NW | 339° NNW | 22° NNE | 54° NE |
| Wind chill | 26°C (78°F) | 26°C (78°F) | 25°C (77°F) | 26°C (79°F) | 26°C (79°F) | 27°C (81°F) | 27°C (81°F) | 26°C (79°F) |
| Waves | ||||||||
| Height | 0.8m (2.6ft) | 0.7m (2.4ft) | 0.7m (2.3ft) | 0.6m (2.1ft) | 0.6m (2.1ft) | 0.7m (2.2ft) | 0.8m (2.6ft) | 0.8m (2.6ft) |
| Direction | 228° SW | 228° SW | 229° SW | 229° SW | 229° SW | 229° SW | 229° SW | 229° SW |
| Period | 5.7 sec. | 5.7 sec. | 5.6 sec. | 15.4 sec. | 15.3 sec. | 4.8 sec. | 5.2 sec. | 5.5 sec. |
| Significant height | 0.8m (2.6ft) | 0.7m (2.3ft) | 0.6m (2ft) | 0.6m (2ft) | 0.6m (2ft) | 0.5m (1.6ft) | 1.0m (3.3ft) | 0.9m (3ft) |
| Sea water temperature | ||||||||
| Water temperature | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) |
Sea weather on Thursday 18 December 2025
On Thursday 18 December 2025, the sun will rise at 06:16 and will set at 17:59 on the beach(es) of Dehiwala-Mount Lavinia. The outside temperature will be a high of 83°F t and a low of 77°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 24.9mph). Wave height will be up to 3ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | |  | | |
| Outside temperature | 25°C (78°F) | 25°C (77°F) | 25°C (76°F) | 26°C (79°F) | 27°C (81°F) | 27°C (81°F) | 27°C (80°F) | 25°C (78°F) |
| Perceived temperature | 28°C (83°F) | 28°C (82°F) | 27°C (81°F) | 29°C (84°F) | 30°C (86°F) | 30°C (87°F) | 30°C (86°F) | 28°C (82°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 87% | 87% | 87% | 80% | 71% | 75% | 79% | 85% |
| Barometric pressure | 1011 hPa | 1010 hPa | 1011 hPa | 1013 hPa | 1010 hPa | 1008 hPa | 1010 hPa | 1012 hPa |
| Cloud cover | 87% | 32% | 26% | 22% | 72% | 80% | 70% | 23% |
| Heat index | 28°C (83°F) | 28°C (82°F) | 27°C (81°F) | 29°C (84°F) | 30°C (86°F) | 30°C (87°F) | 30°C (86°F) | 28°C (82°F) |
| Dew point | 23°C (73°F) | 23°C (73°F) | 22°C (72°F) | 22°C (72°F) | 22°C (71°F) | 23°C (73°F) | 23°C (73°F) | 23°C (73°F) |
| Wind | ||||||||
| Speed | 12km/h (8mph) | 13km/h (8mph) | 14km/h (9mph) | 13km/h (8mph) | 9km/h (6mph) | 4km/h (2mph) | 10km/h (6mph) | 27km/h (17mph) |
| Gusts | 18km/h (11mph) | 19km/h (12mph) | 20km/h (12mph) | 16km/h (10mph) | 14km/h (9mph) | 6km/h (4mph) | 15km/h (9mph) | 40km/h (25mph) |
| Direction | 48° NE | 31° NNE | 40° NE | 39° NE | 346° NNW | 327° NNW | 43° NE | 32° NNE |
| Wind chill | 25°C (78°F) | 25°C (77°F) | 25°C (76°F) | 26°C (79°F) | 27°C (81°F) | 27°C (81°F) | 27°C (80°F) | 25°C (78°F) |
| Waves | ||||||||
| Height | 0.7m (2.4ft) | 0.7m (2.2ft) | 0.7m (2.2ft) | 0.7m (2.2ft) | 0.7m (2.2ft) | 0.7m (2.3ft) | 0.8m (2.6ft) | 0.9m (2.8ft) |
| Direction | 229° SW | 229° SW | 230° SW | 230° SW | 230° SW | 230° SW | 230° SW | 231° SW |
| Period | 5.5 sec. | 5.3 sec. | 13.8 sec. | 5.5 sec. | 5.8 sec. | 5.8 sec. | 6.0 sec. | 13.1 sec. |
| Significant height | 0.6m (2ft) | 0.5m (1.6ft) | 0.7m (2.3ft) | 0.7m (2.3ft) | 0.6m (2ft) | 0.8m (2.6ft) | 0.7m (2.3ft) | 0.9m (3ft) |
| Sea water temperature | ||||||||
| Water temperature | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) |
Sea weather on Friday 19 December 2025
On Friday 19 December 2025, the sun will rise at 06:16 and will set at 18:00 on the beach(es) of Dehiwala-Mount Lavinia. The outside temperature will be a high of 83°F t and a low of 76°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 24.9mph). Wave height will be up to 4.6ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | | |
| Outside temperature | 25°C (77°F) | 25°C (76°F) | 24°C (76°F) | 26°C (78°F) | 28°C (82°F) | 27°C (81°F) | 27°C (80°F) | 26°C (78°F) |
| Perceived temperature | 27°C (81°F) | 27°C (80°F) | 26°C (80°F) | 28°C (83°F) | 31°C (87°F) | 31°C (87°F) | 30°C (86°F) | 28°C (83°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 84% | 84% | 85% | 79% | 71% | 79% | 79% | 80% |
| Barometric pressure | 1011 hPa | 1010 hPa | 1011 hPa | 1012 hPa | 1010 hPa | 1008 hPa | 1009 hPa | 1011 hPa |
| Cloud cover | 22% | 29% | 27% | 53% | 72% | 54% | 57% | 51% |
| Heat index | 27°C (81°F) | 27°C (80°F) | 26°C (80°F) | 28°C (83°F) | 31°C (87°F) | 31°C (87°F) | 30°C (86°F) | 28°C (83°F) |
| Dew point | 22°C (72°F) | 22°C (71°F) | 22°C (71°F) | 22°C (72°F) | 22°C (72°F) | 23°C (74°F) | 23°C (73°F) | 22°C (72°F) |
| Wind | ||||||||
| Speed | 26km/h (16mph) | 27km/h (17mph) | 26km/h (16mph) | 24km/h (15mph) | 22km/h (13mph) | 26km/h (16mph) | 23km/h (14mph) | 22km/h (14mph) |
| Gusts | 36km/h (22mph) | 38km/h (24mph) | 36km/h (23mph) | 32km/h (20mph) | 32km/h (20mph) | 40km/h (25mph) | 34km/h (21mph) | 33km/h (20mph) |
| Direction | 25° NNE | 22° NNE | 24° NNE | 20° NNE | 349° NNW | 336° NNW | 245° WSW | 22° NNE |
| Wind chill | 25°C (77°F) | 25°C (76°F) | 24°C (76°F) | 26°C (78°F) | 28°C (82°F) | 27°C (81°F) | 27°C (80°F) | 26°C (78°F) |
| Waves | ||||||||
| Height | 1.1m (3.6ft) | 1.1m (3.6ft) | 1.4m (4.7ft) | 1.4m (4.4ft) | 1.3m (4.1ft) | 1.2m (3.9ft) | 1.2m (3.9ft) | 1.3m (4.3ft) |
| Direction | 231° SW | 231° SW | 210° SSW | 208° SSW | 207° SSW | 207° SSW | 207° SSW | 206° SSW |
| Period | 12.8 sec. | 6.6 sec. | 12.7 sec. | 12.4 sec. | 12.2 sec. | 12.0 sec. | 10.0 sec. | 8.1 sec. |
| Significant height | 1.1m (3.6ft) | 1.1m (3.6ft) | 1.2m (3.9ft) | 1.1m (3.6ft) | 0.9m (3ft) | 0.9m (3ft) | 0.8m (2.6ft) | 0.7m (2.3ft) |
| Sea water temperature | ||||||||
| Water temperature | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) |
Sea weather on Saturday 20 December 2025
On Saturday 20 December 2025, the sun will rise at 06:17 and will set at 18:00 on the beach(es) of Dehiwala-Mount Lavinia. The outside temperature will be a high of 81°F t and a low of 76°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 26.1mph). Wave height will be up to 4.3ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | |  | | |
| Outside temperature | 25°C (76°F) | 24°C (75°F) | 24°C (76°F) | 25°C (78°F) | 27°C (80°F) | 27°C (80°F) | 27°C (80°F) | 26°C (78°F) |
| Perceived temperature | 27°C (80°F) | 26°C (79°F) | 26°C (79°F) | 27°C (81°F) | 29°C (84°F) | 30°C (85°F) | 29°C (85°F) | 28°C (82°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 83% | 85% | 83% | 78% | 71% | 74% | 75% | 75% |
| Barometric pressure | 1010 hPa | 1009 hPa | 1010 hPa | 1011 hPa | 1009 hPa | 1008 hPa | 1009 hPa | 1010 hPa |
| Cloud cover | 57% | 73% | 64% | 55% | 55% | 66% | 71% | 40% |
| Heat index | 27°C (80°F) | 26°C (79°F) | 26°C (79°F) | 27°C (81°F) | 29°C (84°F) | 30°C (85°F) | 29°C (85°F) | 28°C (82°F) |
| Dew point | 22°C (71°F) | 21°C (70°F) | 21°C (70°F) | 21°C (70°F) | 21°C (70°F) | 22°C (71°F) | 22°C (72°F) | 21°C (70°F) |
| Wind | ||||||||
| Speed | 21km/h (13mph) | 22km/h (13mph) | 22km/h (14mph) | 20km/h (13mph) | 19km/h (12mph) | 26km/h (16mph) | 27km/h (17mph) | 26km/h (16mph) |
| Gusts | 31km/h (19mph) | 30km/h (19mph) | 30km/h (19mph) | 27km/h (17mph) | 27km/h (17mph) | 39km/h (24mph) | 42km/h (26mph) | 38km/h (23mph) |
| Direction | 23° NNE | 23° NNE | 24° NNE | 133° SE | 345° NNW | 336° NNW | 230° SW | 8° N |
| Wind chill | 25°C (76°F) | 24°C (75°F) | 24°C (76°F) | 25°C (78°F) | 27°C (80°F) | 27°C (80°F) | 27°C (80°F) | 26°C (78°F) |
| Waves | ||||||||
| Height | 1.3m (4.3ft) | 1.3m (4.3ft) | 1.2m (3.9ft) | 1.1m (3.6ft) | 1.1m (3.6ft) | 1.1m (3.6ft) | 1.2m (3.9ft) | 1.3m (4.3ft) |
| Direction | 206° SSW | 202° SSW | 194° SSW | 194° SSW | 195° SSW | 192° SSW | 186° S | 186° S |
| Period | 11.8 sec. | 11.4 sec. | 10.7 sec. | 9.3 sec. | 7.4 sec. | 10.4 sec. | 10.0 sec. | 9.8 sec. |
| Significant height | 1.0m (3.3ft) | 1.0m (3.3ft) | 0.9m (3ft) | 0.9m (3ft) | 0.9m (3ft) | 1.0m (3.3ft) | 1.0m (3.3ft) | 1.1m (3.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) |
Sea weather on Sunday 21 December 2025
On Sunday 21 December 2025, the sun will rise at 06:17 and will set at 18:01 on the beach(es) of Dehiwala-Mount Lavinia. The outside temperature will be a high of 81°F t and a low of 76°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 26.7mph). Wave height will be up to 4.3ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | |  | |
| Outside temperature | 24°C (76°F) | 24°C (75°F) | 24°C (75°F) | 25°C (77°F) | 27°C (80°F) | 27°C (81°F) | 27°C (80°F) | 26°C (78°F) |
| Perceived temperature | 26°C (79°F) | 26°C (79°F) | 26°C (79°F) | 27°C (80°F) | 28°C (83°F) | 29°C (84°F) | 29°C (84°F) | 28°C (82°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 78% | 78% | 77% | 72% | 65% | 68% | 72% | 74% |
| Barometric pressure | 1010 hPa | 1009 hPa | 1010 hPa | 1011 hPa | 1010 hPa | 1008 hPa | 1009 hPa | 1011 hPa |
| Cloud cover | 44% | 70% | 64% | 42% | 30% | 21% | 18% | 19% |
| Heat index | 26°C (79°F) | 26°C (79°F) | 26°C (79°F) | 27°C (80°F) | 28°C (83°F) | 29°C (84°F) | 29°C (84°F) | 28°C (82°F) |
| Dew point | 20°C (69°F) | 20°C (68°F) | 20°C (68°F) | 20°C (67°F) | 20°C (67°F) | 21°C (69°F) | 21°C (70°F) | 21°C (69°F) |
| Wind | ||||||||
| Speed | 26km/h (16mph) | 26km/h (16mph) | 26km/h (16mph) | 25km/h (16mph) | 24km/h (15mph) | 28km/h (18mph) | 27km/h (17mph) | 23km/h (14mph) |
| Gusts | 37km/h (23mph) | 36km/h (23mph) | 35km/h (22mph) | 34km/h (21mph) | 36km/h (22mph) | 43km/h (27mph) | 42km/h (26mph) | 35km/h (21mph) |
| Direction | 17° NNE | 20° NNE | 21° NNE | 16° NNE | 114° ESE | 340° NNW | 232° SW | 15° NNE |
| Wind chill | 24°C (76°F) | 24°C (75°F) | 24°C (75°F) | 25°C (77°F) | 27°C (80°F) | 27°C (81°F) | 27°C (80°F) | 26°C (78°F) |
| Waves | ||||||||
| Height | 1.3m (4.3ft) | 1.3m (4.3ft) | 1.3m (4.3ft) | 1.2m (3.9ft) | 1.2m (3.9ft) | 1.2m (3.9ft) | 1.2m (3.9ft) | 1.2m (3.9ft) |
| Direction | 186° S | 185° S | 184° S | 183° S | 182° S | 182° S | 180° S | 178° S |
| Period | 9.7 sec. | 9.7 sec. | 9.8 sec. | 9.8 sec. | 9.8 sec. | 9.8 sec. | 9.7 sec. | 10.0 sec. |
| Significant height | 1.2m (3.9ft) | 1.2m (3.9ft) | 1.2m (3.9ft) | 1.2m (3.9ft) | 1.1m (3.6ft) | 1.2m (3.9ft) | 1.1m (3.6ft) | 1.1m (3.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) |