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. Our opinion
Monday 20 July 202679°F to 83°Fdiscouraged
Tuesday 21 July 202681°F to 83°Frecommended
Wednesday 22 July 202681°F to 83°Frecommended
Thursday 23 July 202676°F to 83°Frecommended
Friday 24 July 202681°F to 83°Frecommended
Saturday 25 July 202681°F to 83°Frecommended
Sunday 26 July 202681°F to 83°Frecommended

Sea Weather: Your daily and hourly sea weather in Dehiwala-Mount Lavinia

Sea weather on Monday 20 July 2026

On Monday 20 July 2026, the sun will rise at 06:03 and will set at 18:31 on the beach(es) of Dehiwala-Mount Lavinia. The outside temperature will be a high of 83°F t and a low of 79°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 14.9mph km/h (with gusts up to 25.5mph). Wave height will be up to 5.2ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature27°C (80°F)26°C (80°F)27°C (80°F)27°C (81°F)27°C (81°F)28°C (82°F)27°C (81°F)27°C (80°F)
Perceived temperature30°C (86°F)30°C (85°F)30°C (86°F)31°C (87°F)30°C (87°F)31°C (88°F)31°C (87°F)30°C (87°F)
Precipitation0in0.1in0in0in0in0in0in0in
Humidity84%84%83%80%77%77%81%83%
Barometric pressure1011 hPa1011 hPa1011 hPa1013 hPa1011 hPa1009 hPa1011 hPa1012 hPa
Cloud cover52%59%49%32%36%46%34%43%
Heat index30°C (86°F)30°C (85°F)30°C (86°F)31°C (87°F)30°C (87°F)31°C (88°F)31°C (87°F)30°C (87°F)
Dew point24°C (75°F)23°C (74°F)24°C (74°F)24°C (74°F)23°C (73°F)23°C (74°F)24°C (74°F)24°C (75°F)
Wind
Speed22km/h (14mph)22km/h (14mph)22km/h (13mph)24km/h (15mph)22km/h (13mph)20km/h (13mph)18km/h (11mph)18km/h (11mph)
Gusts32km/h (20mph)36km/h (23mph)31km/h (19mph)41km/h (25mph)32km/h (20mph)29km/h (18mph)26km/h (16mph)26km/h (16mph)
Direction 236°
WSW
248°
WSW
244°
WSW
246°
WSW
252°
WSW
247°
WSW
252°
WSW
238°
WSW
Wind chill27°C (80°F)26°C (80°F)27°C (80°F)27°C (81°F)27°C (81°F)28°C (82°F)27°C (81°F)27°C (80°F)
Waves
Height1.5m (5.0ft)1.6m (5.2ft)1.6m (5.3ft)1.6m (5.3ft)1.6m (5.3ft)1.6m (5.2ft)1.6m (5.2ft)1.6m (5.2ft)
Direction 225°
SW
250°
WSW
254°
WSW
251°
WSW
211°
SSW
199°
SSW
200°
SSW
199°
SSW
Period10.8 sec.11.6 sec.12.0 sec.12.2 sec.11.9 sec.11.5 sec.14.7 sec.13.4 sec.
Significant height1.0m (3.3ft)1.0m (3.3ft)1.0m (3.3ft)1.1m (3.6ft)1.1m (3.6ft)1.1m (3.6ft)1.1m (3.6ft)1.1m (3.6ft)
Sea water temperature
Water temperature26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)

Sea weather on Tuesday 21 July 2026

On Tuesday 21 July 2026, the sun will rise at 06:04 and will set at 18:31 on the beach(es) of Dehiwala-Mount Lavinia. The outside temperature will be a high of 83°F t and a low of 81°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 11.8mph km/h (with gusts up to 17.4mph). Wave height will be up to 5.6ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature27°C (80°F)27°C (80°F)27°C (80°F)28°C (82°F)27°C (81°F)28°C (82°F)27°C (81°F)27°C (81°F)
Perceived temperature30°C (87°F)30°C (86°F)30°C (87°F)32°C (89°F)31°C (87°F)31°C (88°F)31°C (87°F)31°C (88°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity83%82%82%79%77%76%81%83%
Barometric pressure1011 hPa1011 hPa1011 hPa1012 hPa1011 hPa1009 hPa1011 hPa1012 hPa
Cloud cover48%45%48%15%40%40%35%4%
Heat index30°C (87°F)30°C (86°F)30°C (87°F)32°C (89°F)31°C (87°F)31°C (88°F)31°C (87°F)31°C (88°F)
Dew point24°C (75°F)23°C (74°F)24°C (75°F)24°C (75°F)23°C (73°F)23°C (73°F)24°C (75°F)24°C (75°F)
Wind
Speed19km/h (12mph)18km/h (11mph)18km/h (11mph)17km/h (11mph)17km/h (11mph)15km/h (9mph)15km/h (9mph)16km/h (10mph)
Gusts28km/h (17mph)26km/h (16mph)26km/h (16mph)24km/h (15mph)25km/h (16mph)21km/h (13mph)23km/h (14mph)24km/h (15mph)
Direction 251°
WSW
251°
WSW
245°
WSW
255°
WSW
269°
W
269°
W
245°
WSW
239°
WSW
Wind chill27°C (80°F)27°C (80°F)27°C (80°F)28°C (82°F)27°C (81°F)28°C (82°F)27°C (81°F)27°C (81°F)
Waves
Height1.6m (5.3ft)1.7m (5.5ft)1.7m (5.6ft)1.7m (5.4ft)1.6m (5.2ft)1.5m (5.0ft)1.4m (4.7ft)1.4m (4.5ft)
Direction 199°
SSW
200°
SSW
200°
SSW
200°
SSW
200°
SSW
201°
SSW
201°
SSW
201°
SSW
Period13.4 sec.15.9 sec.10.8 sec.6.1 sec.6.1 sec.10.3 sec.12.3 sec.12.1 sec.
Significant height1.2m (3.9ft)1.3m (4.3ft)0.9m (3ft)1.0m (3.3ft)0.9m (3ft)0.8m (2.6ft)0.8m (2.6ft)0.7m (2.3ft)
Sea water temperature
Water temperature26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)

Sea weather on Wednesday 22 July 2026

On Wednesday 22 July 2026, the sun will rise at 06:04 and will set at 18:31 on the beach(es) of Dehiwala-Mount Lavinia. The outside temperature will be a high of 83°F t and a low of 81°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 11.2mph km/h (with gusts up to 16.8mph). Wave height will be up to 4.6ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature27°C (81°F)27°C (81°F)27°C (80°F)28°C (82°F)28°C (82°F)28°C (82°F)27°C (81°F)27°C (81°F)
Perceived temperature31°C (88°F)31°C (87°F)30°C (87°F)32°C (89°F)31°C (88°F)31°C (88°F)31°C (88°F)31°C (87°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity83%83%83%78%77%76%82%84%
Barometric pressure1012 hPa1010 hPa1011 hPa1012 hPa1011 hPa1010 hPa1010 hPa1012 hPa
Cloud cover9%14%48%46%33%31%45%49%
Heat index31°C (88°F)31°C (87°F)30°C (87°F)32°C (89°F)31°C (88°F)31°C (88°F)31°C (88°F)31°C (87°F)
Dew point24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)23°C (74°F)23°C (74°F)24°C (75°F)24°C (75°F)
Wind
Speed15km/h (9mph)18km/h (11mph)17km/h (10mph)17km/h (10mph)17km/h (10mph)17km/h (10mph)15km/h (10mph)18km/h (11mph)
Gusts22km/h (14mph)26km/h (16mph)25km/h (15mph)22km/h (14mph)25km/h (15mph)24km/h (15mph)23km/h (14mph)27km/h (17mph)
Direction 234°
SW
240°
WSW
242°
WSW
233°
SW
247°
WSW
254°
WSW
246°
WSW
230°
SW
Wind chill27°C (81°F)27°C (81°F)27°C (80°F)28°C (82°F)28°C (82°F)28°C (82°F)27°C (81°F)27°C (81°F)
Waves
Height1.3m (4.4ft)1.3m (4.4ft)1.4m (4.5ft)1.4m (4.5ft)1.3m (4.4ft)1.3m (4.4ft)1.3m (4.2ft)1.2m (4.1ft)
Direction 202°
SSW
202°
SSW
202°
SSW
203°
SSW
203°
SSW
204°
SSW
204°
SSW
205°
SSW
Period11.8 sec.11.6 sec.7.7 sec.6.0 sec.13.3 sec.13.1 sec.5.4 sec.10.8 sec.
Significant height1.1m (3.6ft)1.2m (3.9ft)1.1m (3.6ft)1.1m (3.6ft)1.0m (3.3ft)1.2m (3.9ft)1.1m (3.6ft)1.0m (3.3ft)
Sea water temperature
Water temperature26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)

Sea weather on Thursday 23 July 2026

On Thursday 23 July 2026, the sun will rise at 06:04 and will set at 18:31 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. Precipitation is in the forecast (0.2in 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 11.2mph km/h (with gusts up to 20.5mph). Wave height will be up to 4.6ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature27°C (80°F)27°C (80°F)27°C (80°F)28°C (82°F)24°C (75°F)28°C (82°F)27°C (81°F)27°C (81°F)
Perceived temperature30°C (86°F)30°C (86°F)30°C (87°F)31°C (88°F)26°C (79°F)31°C (87°F)31°C (87°F)31°C (87°F)
Precipitation0.1in0in0.1in0in0in0in0in0in
Humidity85%84%84%79%77%76%81%83%
Barometric pressure1012 hPa1010 hPa1010 hPa1012 hPa1010 hPa1009 hPa1010 hPa1012 hPa
Cloud cover17%54%35%13%8%16%17%29%
Heat index30°C (86°F)30°C (86°F)30°C (87°F)31°C (88°F)26°C (79°F)31°C (87°F)31°C (87°F)31°C (87°F)
Dew point24°C (75°F)24°C (74°F)24°C (75°F)24°C (74°F)20°C (68°F)23°C (73°F)24°C (74°F)24°C (75°F)
Wind
Speed18km/h (11mph)18km/h (11mph)16km/h (10mph)18km/h (11mph)16km/h (10mph)17km/h (11mph)15km/h (10mph)17km/h (10mph)
Gusts28km/h (17mph)28km/h (17mph)24km/h (15mph)29km/h (18mph)33km/h (21mph)25km/h (16mph)24km/h (15mph)25km/h (15mph)
Direction 229°
SW
236°
SW
237°
WSW
241°
WSW
242°
WSW
241°
WSW
230°
SW
219°
SW
Wind chill27°C (80°F)27°C (80°F)27°C (80°F)28°C (82°F)24°C (75°F)28°C (82°F)27°C (81°F)27°C (81°F)
Waves
Height1.3m (4.1ft)1.3m (4.3ft)1.4m (4.5ft)1.4m (4.5ft)1.3m (4.4ft)1.3m (4.2ft)1.2m (4.0ft)1.2m (3.8ft)
Direction 205°
SSW
204°
SSW
215°
SW
217°
SW
216°
SW
215°
SW
215°
SW
223°
SW
Period10.8 sec.9.0 sec.9.2 sec.6.1 sec.9.6 sec.7.3 sec.8.6 sec.5.2 sec.
Significant height1.0m (3.3ft)1.0m (3.3ft)1.1m (3.6ft)0.5m (1.6ft)0.9m (3ft)1.4m (4.6ft)1.0m (3.3ft)1.0m (3.3ft)
Sea water temperature
Water temperature26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)

Sea weather on Friday 24 July 2026

On Friday 24 July 2026, the sun will rise at 06:04 and will set at 18:31 on the beach(es) of Dehiwala-Mount Lavinia. The outside temperature will be a high of 83°F t and a low of 81°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 11.2mph km/h (with gusts up to 16.2mph). Wave height will be up to 3.9ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature27°C (81°F)27°C (81°F)27°C (81°F)28°C (82°F)27°C (81°F)28°C (82°F)28°C (82°F)27°C (81°F)
Perceived temperature31°C (88°F)31°C (87°F)31°C (87°F)31°C (89°F)30°C (87°F)31°C (88°F)31°C (88°F)31°C (88°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity84%83%82%77%76%75%79%84%
Barometric pressure1010 hPa1009 hPa1010 hPa1011 hPa1010 hPa1008 hPa1009 hPa1010 hPa
Cloud cover16%8%33%26%23%23%26%17%
Heat index31°C (88°F)31°C (87°F)31°C (87°F)31°C (89°F)30°C (87°F)31°C (88°F)31°C (88°F)31°C (88°F)
Dew point24°C (76°F)24°C (75°F)24°C (75°F)23°C (74°F)23°C (73°F)23°C (73°F)24°C (74°F)24°C (76°F)
Wind
Speed15km/h (9mph)18km/h (11mph)16km/h (10mph)15km/h (9mph)15km/h (10mph)17km/h (10mph)14km/h (9mph)15km/h (9mph)
Gusts22km/h (14mph)26km/h (16mph)24km/h (15mph)20km/h (12mph)24km/h (15mph)24km/h (15mph)20km/h (13mph)23km/h (14mph)
Direction 216°
SW
243°
WSW
241°
WSW
245°
WSW
256°
WSW
244°
WSW
230°
SW
227°
SW
Wind chill27°C (81°F)27°C (81°F)27°C (81°F)28°C (82°F)27°C (81°F)28°C (82°F)28°C (82°F)27°C (81°F)
Waves
Height1.1m (3.7ft)1.2m (3.8ft)1.2m (3.9ft)1.2m (3.8ft)1.1m (3.7ft)1.1m (3.6ft)1.1m (3.6ft)1.1m (3.6ft)
Direction 216°
SW
216°
SW
219°
SW
218°
SW
217°
SW
218°
SW
218°
SW
217°
SW
Period8.7 sec.10.2 sec.7.2 sec.5.3 sec.5.3 sec.6.4 sec.6.7 sec.6.0 sec.
Significant height0.9m (3ft)0.8m (2.6ft)1.0m (3.3ft)1.0m (3.3ft)0.9m (3ft)0.9m (3ft)0.9m (3ft)0.9m (3ft)
Sea water temperature
Water temperature26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)26°C (79°F)28°C (83°F)28°C (83°F)

Sea weather on Saturday 25 July 2026

On Saturday 25 July 2026, the sun will rise at 06:04 and will set at 18:31 on the beach(es) of Dehiwala-Mount Lavinia. The outside temperature will be a high of 83°F t and a low of 81°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 18mph). Wave height will be up to 4.3ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature27°C (81°F)27°C (81°F)27°C (81°F)28°C (82°F)28°C (82°F)28°C (82°F)27°C (81°F)27°C (81°F)
Perceived temperature31°C (88°F)31°C (88°F)31°C (88°F)31°C (88°F)31°C (87°F)31°C (88°F)31°C (88°F)31°C (87°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity84%83%81%77%74%75%80%84%
Barometric pressure1010 hPa1009 hPa1010 hPa1011 hPa1010 hPa1009 hPa1010 hPa1011 hPa
Cloud cover13%12%20%27%36%31%33%38%
Heat index31°C (88°F)31°C (88°F)31°C (88°F)31°C (88°F)31°C (87°F)31°C (88°F)31°C (88°F)31°C (87°F)
Dew point24°C (75°F)24°C (75°F)24°C (75°F)23°C (74°F)23°C (73°F)23°C (73°F)24°C (74°F)24°C (75°F)
Wind
Speed17km/h (11mph)18km/h (11mph)17km/h (11mph)19km/h (12mph)20km/h (12mph)19km/h (12mph)16km/h (10mph)16km/h (10mph)
Gusts26km/h (16mph)27km/h (17mph)25km/h (15mph)26km/h (16mph)29km/h (18mph)27km/h (17mph)23km/h (15mph)24km/h (15mph)
Direction 234°
SW
249°
WSW
250°
WSW
247°
WSW
247°
WSW
250°
WSW
243°
WSW
233°
SW
Wind chill27°C (81°F)27°C (81°F)27°C (81°F)28°C (82°F)28°C (82°F)28°C (82°F)27°C (81°F)27°C (81°F)
Waves
Height1.1m (3.6ft)1.1m (3.6ft)1.2m (3.9ft)1.3m (4.3ft)1.3m (4.3ft)1.3m (4.3ft)1.3m (4.3ft)1.3m (4.3ft)
Direction 217°
SW
217°
SW
217°
SW
220°
SW
225°
SW
225°
SW
224°
SW
224°
SW
Period7.9 sec.9.0 sec.9.8 sec.9.8 sec.10.9 sec.10.2 sec.8.1 sec.8.7 sec.
Significant height0.9m (3ft)0.9m (3ft)0.9m (3ft)0.9m (3ft)0.9m (3ft)0.9m (3ft)1.0m (3.3ft)1.0m (3.3ft)
Sea water temperature
Water temperature28°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 26 July 2026

On Sunday 26 July 2026, the sun will rise at 06:04 and will set at 18:31 on the beach(es) of Dehiwala-Mount Lavinia. The outside temperature will be a high of 83°F t and a low of 81°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 18mph). Wave height will be up to 4.9ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature27°C (80°F)27°C (81°F)27°C (81°F)28°C (82°F)28°C (82°F)28°C (82°F)27°C (81°F)27°C (81°F)
Perceived temperature31°C (87°F)31°C (87°F)31°C (87°F)31°C (88°F)31°C (87°F)31°C (88°F)31°C (88°F)31°C (87°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity83%82%81%77%75%77%81%83%
Barometric pressure1011 hPa1010 hPa1011 hPa1011 hPa1011 hPa1009 hPa1010 hPa1011 hPa
Cloud cover38%28%21%29%35%31%24%29%
Heat index31°C (87°F)31°C (87°F)31°C (87°F)31°C (88°F)31°C (87°F)31°C (88°F)31°C (88°F)31°C (87°F)
Dew point24°C (75°F)24°C (75°F)24°C (74°F)23°C (74°F)23°C (73°F)23°C (74°F)24°C (75°F)24°C (75°F)
Wind
Speed18km/h (11mph)19km/h (12mph)19km/h (12mph)20km/h (12mph)20km/h (12mph)20km/h (12mph)19km/h (12mph)18km/h (11mph)
Gusts27km/h (17mph)27km/h (17mph)27km/h (17mph)27km/h (17mph)28km/h (18mph)29km/h (18mph)27km/h (17mph)26km/h (16mph)
Direction 233°
SW
241°
WSW
249°
WSW
252°
WSW
254°
WSW
251°
WSW
244°
WSW
239°
WSW
Wind chill27°C (80°F)27°C (81°F)27°C (81°F)28°C (82°F)28°C (82°F)28°C (82°F)27°C (81°F)27°C (81°F)
Waves
Height1.4m (4.6ft)1.5m (4.9ft)1.5m (4.9ft)1.5m (4.9ft)1.5m (4.9ft)1.4m (4.6ft)1.4m (4.6ft)1.4m (4.6ft)
Direction 223°
SW
222°
SW
221°
SW
220°
SW
218°
SW
215°
SW
208°
SSW
208°
SSW
Period10.8 sec.11.3 sec.10.9 sec.12.1 sec.13.6 sec.13.6 sec.13.5 sec.13.2 sec.
Significant height0.9m (3ft)1.0m (3.3ft)0.9m (3ft)0.9m (3ft)0.9m (3ft)1.0m (3.3ft)1.0m (3.3ft)1.0m (3.3ft)
Sea water temperature
Water temperature28°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 chart over the next 7 days

Outside temperature

Wind speed

Precipitation

Wave height

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