Sea weather in Lamai beach on the island of Koh Samui All the beach weather in Lamai beach

All the essential weather information for enjoying the beach in Lamai beach on the island of Koh Samui, 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 Lamai beach over the next 7 days?

Discover the best moment to go to the beach in Lamai beach on the island of Koh Samui this week to enjoy the best weather and calmest sea possible. Our opinion is based on reliable sea weather forecasts in Lamai beach. You can see full forecasts by clicking on the day you want to see in the table below.

Date Outside temp. Our opinion
Friday 5 December 202579°F to 81°Fdiscouraged
Saturday 6 December 202579°F to 81°Fdiscouraged
Sunday 7 December 202576°F to 81°Frecommended
Monday 8 December 202579°F to 81°Frecommended
Tuesday 9 December 202579°F to 81°Frecommended
Wednesday 10 December 202577°F to 79°Frecommended
Thursday 11 December 202577°F to 79°Frecommended

Sea Weather: Your daily and hourly sea weather in Lamai beach

Sea weather on Friday 5 December 2025

On Friday 5 December 2025, the sun will rise at 06:23 and will set at 17:59 on the beach(es) of Lamai beach. The outside temperature will be a high of 81°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 13.7mph km/h (with gusts up to 21.1mph). Wave height will be up to 1.6ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature26°C (79°F)26°C (80°F)26°C (79°F)27°C (81°F)27°C (81°F)27°C (81°F)27°C (80°F)27°C (80°F)
Perceived temperature29°C (85°F)29°C (84°F)29°C (84°F)30°C (86°F)30°C (85°F)30°C (86°F)30°C (86°F)30°C (86°F)
Precipitation0.1in0in0in0in0in0in0in0in
Humidity84%79%78%75%73%75%81%83%
Barometric pressure1013 hPa1011 hPa1012 hPa1014 hPa1012 hPa1009 hPa1010 hPa1013 hPa
Cloud cover80%100%84%72%77%75%82%80%
Heat index29°C (85°F)29°C (84°F)29°C (84°F)30°C (86°F)30°C (85°F)30°C (86°F)30°C (86°F)30°C (86°F)
Dew point23°C (74°F)22°C (72°F)22°C (72°F)22°C (72°F)22°C (71°F)22°C (72°F)23°C (74°F)24°C (74°F)
Wind
Speed11km/h (7mph)5km/h (3mph)6km/h (4mph)4km/h (2mph)9km/h (6mph)21km/h (13mph)22km/h (14mph)22km/h (13mph)
Gusts18km/h (11mph)8km/h (5mph)9km/h (5mph)5km/h (3mph)14km/h (9mph)31km/h (19mph)34km/h (21mph)33km/h (20mph)
Direction 14°
NNE
24°
NNE
29°
NNE
65°
ENE
91°
E
111°
ESE
110°
ESE
117°
ESE
Wind chill26°C (79°F)26°C (80°F)26°C (79°F)27°C (81°F)27°C (81°F)27°C (81°F)27°C (80°F)27°C (80°F)
Waves
Height0.3m (1.0ft)0.3m (1.1ft)0.3m (0.9ft)0.5m (1.6ft)0.3m (1.1ft)0.2m (0.8ft)0.3m (1.0ft)0.3m (1.1ft)
Direction 35°
NE
43°
NE
43°
NE
48°
NE
62°
ENE
95°
E
98°
E
115°
ESE
Period1.9 sec.1.9 sec.1.9 sec.1.9 sec.1.9 sec.1.9 sec.1.9 sec.1.9 sec.
Significant height0.2m (0.7ft)0.1m (0.3ft)0.1m (0.3ft)0.1m (0.3ft)0.2m (0.7ft)0.7m (2.3ft)0.7m (2.3ft)0.7m (2.3ft)
Sea water temperature
Water temperature25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)

Sea weather on Saturday 6 December 2025

On Saturday 6 December 2025, the sun will rise at 06:23 and will set at 18:00 on the beach(es) of Lamai beach. The outside temperature will be a high of 81°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 13.1mph km/h (with gusts up to 19.9mph). Wave height will be up to 1ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature26°C (80°F)26°C (79°F)26°C (79°F)27°C (80°F)27°C (81°F)27°C (81°F)27°C (80°F)27°C (80°F)
Perceived temperature30°C (85°F)29°C (84°F)29°C (84°F)30°C (86°F)30°C (85°F)30°C (86°F)30°C (85°F)30°C (86°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity83%84%81%78%73%72%78%80%
Barometric pressure1012 hPa1011 hPa1012 hPa1014 hPa1013 hPa1010 hPa1011 hPa1013 hPa
Cloud cover83%71%82%72%70%55%86%76%
Heat index30°C (85°F)29°C (84°F)29°C (84°F)30°C (86°F)30°C (85°F)30°C (86°F)30°C (85°F)30°C (86°F)
Dew point23°C (74°F)23°C (74°F)23°C (73°F)23°C (73°F)22°C (71°F)22°C (71°F)23°C (73°F)23°C (73°F)
Wind
Speed20km/h (12mph)20km/h (13mph)18km/h (11mph)21km/h (13mph)18km/h (11mph)16km/h (10mph)15km/h (9mph)14km/h (9mph)
Gusts29km/h (18mph)31km/h (19mph)32km/h (20mph)30km/h (19mph)27km/h (17mph)23km/h (14mph)23km/h (14mph)21km/h (13mph)
Direction 131°
SE
126°
SE
120°
ESE
110°
ESE
99°
E
87°
E
86°
E
92°
E
Wind chill26°C (80°F)26°C (79°F)26°C (79°F)27°C (80°F)27°C (81°F)27°C (81°F)27°C (80°F)27°C (80°F)
Waves
Height0.3m (0.9ft)0.2m (0.8ft)0.2m (0.8ft)0.1m (0.4ft)0.1m (0.5ft)0.2m (0.6ft)0.2m (0.6ft)0.2m (0.6ft)
Direction 129°
SE
131°
SE
139°
SE
131°
SE
113°
ESE
121°
ESE
131°
SE
135°
SE
Period1.9 sec.1.9 sec.1.9 sec.1.9 sec.1.9 sec.1.9 sec.1.9 sec.1.9 sec.
Significant height0.6m (2ft)0.5m (1.6ft)0.5m (1.6ft)0.3m (1ft)0.4m (1.3ft)0.5m (1.6ft)0.4m (1.3ft)0.4m (1.3ft)
Sea water temperature
Water temperature25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)

Sea weather on Sunday 7 December 2025

On Sunday 7 December 2025, the sun will rise at 06:24 and will set at 18:00 on the beach(es) of Lamai beach. 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 9.3mph km/h (with gusts up to 13.7mph). Wave height will be up to 2ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature27°C (80°F)26°C (79°F)26°C (80°F)27°C (81°F)27°C (80°F)27°C (80°F)27°C (80°F)27°C (80°F)
Perceived temperature30°C (85°F)29°C (84°F)29°C (84°F)30°C (86°F)29°C (84°F)29°C (85°F)29°C (85°F)29°C (85°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity80%80%79%76%73%72%77%79%
Barometric pressure1013 hPa1011 hPa1012 hPa1014 hPa1013 hPa1010 hPa1011 hPa1013 hPa
Cloud cover41%70%41%76%78%87%78%81%
Heat index30°C (85°F)29°C (84°F)29°C (84°F)30°C (86°F)29°C (84°F)29°C (85°F)29°C (85°F)29°C (85°F)
Dew point23°C (73°F)23°C (73°F)22°C (72°F)23°C (73°F)21°C (71°F)22°C (71°F)22°C (72°F)23°C (73°F)
Wind
Speed13km/h (8mph)13km/h (8mph)15km/h (9mph)14km/h (9mph)14km/h (9mph)14km/h (9mph)14km/h (9mph)14km/h (9mph)
Gusts18km/h (11mph)19km/h (12mph)22km/h (14mph)20km/h (12mph)22km/h (14mph)21km/h (13mph)21km/h (13mph)21km/h (13mph)
Direction 95°
E
90°
E
98°
E
110°
ESE
104°
ESE
98°
E
93°
E
94°
E
Wind chill27°C (80°F)26°C (79°F)26°C (80°F)27°C (81°F)27°C (80°F)27°C (80°F)27°C (80°F)27°C (80°F)
Waves
Height0.1m (0.4ft)0.6m (1.9ft)0.3m (1.1ft)0.4m (1.2ft)0.1m (0.4ft)0.1m (0.4ft)0.1m (0.4ft)0.4m (1.4ft)
Direction 140°
SE
134°
SE
108°
ESE
88°
E
98°
E
103°
ESE
108°
ESE
102°
ESE
Period1.9 sec.1.9 sec.1.9 sec.1.9 sec.1.9 sec.1.9 sec.1.9 sec.1.9 sec.
Significant height0.3m (1ft)0.2m (0.7ft)0.2m (0.7ft)0.3m (1ft)0.3m (1ft)0.4m (1.3ft)0.3m (1ft)0.3m (1ft)
Sea water temperature
Water temperature25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)

Sea weather on Monday 8 December 2025

On Monday 8 December 2025, the sun will rise at 06:24 and will set at 18:00 on the beach(es) of Lamai beach. The outside temperature will be a high of 81°F t and a low of 79°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 10.6mph km/h (with gusts up to 15.5mph). Wave height will be up to 1.6ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature26°C (80°F)26°C (78°F)26°C (78°F)27°C (80°F)27°C (81°F)27°C (81°F)27°C (80°F)27°C (80°F)
Perceived temperature29°C (84°F)28°C (83°F)28°C (82°F)29°C (85°F)29°C (84°F)29°C (85°F)29°C (84°F)29°C (84°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity78%79%78%73%68%68%76%77%
Barometric pressure1013 hPa1011 hPa1011 hPa1013 hPa1012 hPa1010 hPa1011 hPa1013 hPa
Cloud cover78%86%58%51%55%48%83%70%
Heat index29°C (84°F)28°C (83°F)28°C (82°F)29°C (85°F)29°C (84°F)29°C (85°F)29°C (84°F)29°C (84°F)
Dew point22°C (72°F)22°C (71°F)22°C (71°F)22°C (71°F)21°C (69°F)21°C (69°F)22°C (72°F)22°C (72°F)
Wind
Speed11km/h (7mph)10km/h (6mph)10km/h (6mph)10km/h (6mph)13km/h (8mph)17km/h (10mph)15km/h (9mph)16km/h (10mph)
Gusts16km/h (10mph)16km/h (10mph)16km/h (10mph)14km/h (9mph)19km/h (12mph)23km/h (15mph)23km/h (14mph)25km/h (15mph)
Direction 107°
ESE
102°
ESE
109°
ESE
102°
ESE
104°
ESE
105°
ESE
99°
E
90°
E
Wind chill26°C (80°F)26°C (78°F)26°C (78°F)27°C (80°F)27°C (81°F)27°C (81°F)27°C (80°F)27°C (80°F)
Waves
Height0.4m (1.3ft)0.1m (0.3ft)0.5m (1.8ft)0.5m (1.8ft)0.4m (1.4ft)0.4m (1.3ft)0.1m (0.4ft)0.2m (0.6ft)
Direction 104°
ESE
103°
ESE
108°
ESE
108°
ESE
76°
ENE
78°
ENE
87°
E
94°
E
Period1.9 sec.1.9 sec.1.9 sec.1.9 sec.1.9 sec.1.9 sec.1.9 sec.1.9 sec.
Significant height0.3m (1ft)0.2m (0.7ft)0.2m (0.7ft)0.2m (0.7ft)0.3m (1ft)0.3m (1ft)0.3m (1ft)0.4m (1.3ft)
Sea water temperature
Water temperature25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)

Sea weather on Tuesday 9 December 2025

On Tuesday 9 December 2025, the sun will rise at 06:25 and will set at 18:01 on the beach(es) of Lamai beach. The outside temperature will be a high of 81°F t and a low of 79°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 18mph). Wave height will be up to 1ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature26°C (79°F)26°C (79°F)26°C (78°F)27°C (80°F)26°C (79°F)27°C (80°F)26°C (79°F)26°C (79°F)
Perceived temperature28°C (83°F)28°C (82°F)28°C (82°F)29°C (84°F)28°C (82°F)29°C (84°F)28°C (83°F)28°C (82°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity78%75%73%69%67%67%73%74%
Barometric pressure1012 hPa1011 hPa1011 hPa1013 hPa1012 hPa1010 hPa1010 hPa1012 hPa
Cloud cover77%85%80%70%23%58%65%59%
Heat index28°C (83°F)28°C (82°F)28°C (82°F)29°C (84°F)28°C (82°F)29°C (84°F)28°C (83°F)28°C (82°F)
Dew point22°C (71°F)21°C (70°F)21°C (69°F)21°C (69°F)20°C (67°F)20°C (68°F)21°C (70°F)21°C (70°F)
Wind
Speed15km/h (9mph)12km/h (8mph)12km/h (7mph)12km/h (7mph)15km/h (9mph)15km/h (9mph)19km/h (12mph)18km/h (11mph)
Gusts23km/h (14mph)18km/h (11mph)18km/h (11mph)16km/h (10mph)23km/h (14mph)21km/h (13mph)29km/h (18mph)27km/h (17mph)
Direction 97°
E
120°
ESE
111°
ESE
93°
E
58°
ENE
41°
NE
39°
NE
38°
NE
Wind chill26°C (79°F)26°C (79°F)26°C (78°F)27°C (80°F)26°C (79°F)27°C (80°F)26°C (79°F)26°C (79°F)
Waves
Height0.2m (0.6ft)0.1m (0.4ft)0.1m (0.5ft)0.2m (0.6ft)0.2m (0.5ft)0.2m (0.7ft)0.3m (0.9ft)0.3m (1.0ft)
Direction 93°
E
97°
E
120°
ESE
74°
ENE
70°
ENE
73°
ENE
77°
ENE
81°
E
Period1.9 sec.1.9 sec.1.9 sec.1.8 sec.1.8 sec.1.8 sec.1.8 sec.1.8 sec.
Significant height0.4m (1.3ft)0.3m (1ft)0.4m (1.3ft)0.4m (1.3ft)0.4m (1.3ft)0.5m (1.6ft)0.6m (2ft)0.6m (2ft)
Sea water temperature
Water temperature25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)25°C (78°F)27°C (81°F)

Sea weather on Wednesday 10 December 2025

On Wednesday 10 December 2025, the sun will rise at 06:26 and will set at 18:01 on the beach(es) of Lamai beach. The outside temperature will be a high of 79°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 12.4mph km/h (with gusts up to 18mph). Wave height will be up to 1ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature26°C (78°F)26°C (78°F)26°C (78°F)26°C (79°F)26°C (80°F)26°C (79°F)26°C (78°F)25°C (78°F)
Perceived temperature28°C (82°F)28°C (82°F)28°C (82°F)28°C (83°F)28°C (83°F)28°C (82°F)28°C (82°F)27°C (81°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity76%76%74%70%68%69%71%72%
Barometric pressure1012 hPa1011 hPa1011 hPa1012 hPa1011 hPa1009 hPa1009 hPa1010 hPa
Cloud cover59%66%63%56%59%49%50%45%
Heat index28°C (82°F)28°C (82°F)28°C (82°F)28°C (83°F)28°C (83°F)28°C (82°F)28°C (82°F)27°C (81°F)
Dew point21°C (70°F)21°C (70°F)21°C (69°F)20°C (69°F)20°C (68°F)20°C (68°F)20°C (68°F)20°C (68°F)
Wind
Speed17km/h (11mph)18km/h (11mph)18km/h (11mph)18km/h (11mph)20km/h (13mph)20km/h (13mph)18km/h (11mph)14km/h (9mph)
Gusts24km/h (15mph)26km/h (16mph)26km/h (16mph)25km/h (15mph)28km/h (17mph)29km/h (18mph)26km/h (16mph)21km/h (13mph)
Direction 29°
NNE
25°
NNE
34°
NNE
36°
NE
30°
NNE
25°
NNE
23°
NNE
16°
NNE
Wind chill26°C (78°F)26°C (78°F)26°C (78°F)26°C (79°F)26°C (80°F)26°C (79°F)26°C (78°F)25°C (78°F)
Waves
Height0.2m (0.7ft)0.1m (0.3ft)0.2m (0.7ft)0.2m (0.7ft)0.3m (1.0ft)0.3m (1.0ft)0.3m (1.0ft)0.3m (1.0ft)
Direction 82°
E
75°
ENE
50°
NE
36°
NE
33°
NNE
33°
NNE
34°
NNE
37°
NE
Period1.8 sec.1.8 sec.1.8 sec.1.8 sec.1.8 sec.1.8 sec.1.8 sec.1.8 sec.
Significant height0.5m (1.6ft)0.4m (1.3ft)0.5m (1.6ft)0.6m (2ft)0.7m (2.3ft)0.8m (2.6ft)0.8m (2.6ft)0.7m (2.3ft)
Sea water temperature
Water temperature27°C (81°F)27°C (81°F)27°C (81°F)27°C (81°F)27°C (81°F)27°C (81°F)27°C (81°F)27°C (81°F)

Sea weather on Thursday 11 December 2025

On Thursday 11 December 2025, the sun will rise at 06:26 and will set at 18:01 on the beach(es) of Lamai beach. The outside temperature will be a high of 79°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 9.9mph km/h (with gusts up to 14.3mph). Wave height will be up to 1ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature25°C (77°F)25°C (77°F)25°C (77°F)26°C (79°F)26°C (80°F)26°C (79°F)26°C (79°F)26°C (78°F)
Perceived temperature27°C (80°F)27°C (80°F)27°C (80°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity72%72%70%66%66%67%69%72%
Barometric pressure1010 hPa1009 hPa1010 hPa1011 hPa1010 hPa1008 hPa1008 hPa1010 hPa
Cloud cover16%13%16%24%44%40%26%31%
Heat index27°C (80°F)27°C (80°F)27°C (80°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)
Dew point20°C (67°F)19°C (67°F)19°C (66°F)19°C (67°F)20°C (67°F)20°C (67°F)20°C (68°F)20°C (69°F)
Wind
Speed12km/h (7mph)11km/h (7mph)11km/h (7mph)12km/h (8mph)15km/h (9mph)16km/h (10mph)15km/h (9mph)13km/h (8mph)
Gusts17km/h (11mph)16km/h (10mph)17km/h (10mph)17km/h (11mph)21km/h (13mph)23km/h (14mph)22km/h (14mph)19km/h (12mph)
Direction 13°
NNE
241°
WSW
122°
ESE
13°
NNE
18°
NNE
20°
NNE
25°
NNE
20°
NNE
Wind chill25°C (77°F)25°C (77°F)25°C (77°F)26°C (79°F)26°C (80°F)26°C (79°F)26°C (79°F)26°C (78°F)
Waves
Height0.2m (0.7ft)0.1m (0.3ft)0.1m (0.3ft)0.2m (0.7ft)0.2m (0.7ft)0.2m (0.7ft)0.3m (1.0ft)0.2m (0.7ft)
Direction 42°
NE
42°
NE
39°
NE
37°
NE
36°
NE
37°
NE
38°
NE
41°
NE
Period1.8 sec.1.8 sec.1.8 sec.1.8 sec.1.8 sec.1.8 sec.1.8 sec.1.8 sec.
Significant height0.5m (1.6ft)0.4m (1.3ft)0.4m (1.3ft)0.4m (1.3ft)0.5m (1.6ft)0.6m (2ft)0.6m (2ft)0.5m (1.6ft)
Sea water temperature
Water temperature27°C (81°F)27°C (81°F)27°C (81°F)27°C (81°F)27°C (81°F)27°C (81°F)27°C (81°F)27°C (81°F)

Sea weather chart over the next 7 days

Outside temperature

Wind speed

Precipitation

Wave height

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