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

All the essential weather information for enjoying the beach in Koh Madsum 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 Koh Madsum over the next 7 days?

Discover the best moment to go to the beach in Koh Madsum 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 Koh Madsum. You can see full forecasts by clicking on the day you want to see in the table below.

Date Outside temp. Our opinion
Sunday 15 June 202577°F to 85°Frecommended
Monday 16 June 202581°F to 86°Frecommended
Tuesday 17 June 202583°F to 86°Fdiscouraged
Wednesday 18 June 202581°F to 85°Fdiscouraged
Thursday 19 June 202581°F to 85°Fdiscouraged
Friday 20 June 202581°F to 86°Fdiscouraged
Saturday 21 June 202579°F to 83°Fdiscouraged

Sea Weather: Your daily and hourly sea weather in Koh Madsum

Sea weather on Sunday 15 June 2025

On Sunday 15 June 2025, the sun will rise at 06:01 and will set at 18:41 on the beach(es) of Koh Madsum. The outside temperature will be a high of 85°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 7.5mph km/h (with gusts up to 11.2mph). Wave height will be up to 1.3ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature29°C (84°F)28°C (82°F)28°C (82°F)28°C (83°F)25°C (78°F)27°C (81°F)29°C (85°F)28°C (83°F)
Perceived temperature33°C (91°F)32°C (89°F)31°C (88°F)32°C (90°F)27°C (81°F)29°C (84°F)34°C (92°F)32°C (90°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity74%77%78%74%69%66%71%75%
Barometric pressure1010 hPa1008 hPa1009 hPa1010 hPa1009 hPa1007 hPa1007 hPa1009 hPa
Cloud cover14%14%11%9%10%8%23%75%
Heat index33°C (91°F)32°C (89°F)31°C (88°F)32°C (90°F)27°C (81°F)29°C (84°F)34°C (92°F)32°C (90°F)
Dew point24°C (74°F)23°C (74°F)23°C (74°F)23°C (74°F)19°C (67°F)20°C (68°F)23°C (74°F)23°C (74°F)
Wind
Speed6km/h (4mph)12km/h (7mph)10km/h (6mph)6km/h (4mph)2km/h (1mph)5km/h (3mph)11km/h (7mph)6km/h (4mph)
Gusts10km/h (6mph)18km/h (11mph)15km/h (9mph)9km/h (5mph)4km/h (2mph)10km/h (6mph)16km/h (10mph)11km/h (7mph)
Direction 228°
SW
233°
SW
209°
SSW
223°
SW
286°
WNW
28°
NNE
107°
ESE
148°
SSE
Wind chill29°C (84°F)28°C (82°F)28°C (82°F)28°C (83°F)25°C (78°F)27°C (81°F)29°C (85°F)28°C (83°F)
Waves
Height0.1m (0.4ft)0.3m (1.1ft)0.2m (0.5ft)0.3m (0.9ft)0.2m (0.6ft)0.4m (1.4ft)0.1m (0.4ft)0.4m (1.2ft)
Direction 29°
NNE
276°
W
228°
SW
263°
W
260°
W
325°
NW
61°
ENE
87°
E
Period1.8 sec.1.8 sec.1.8 sec.1.8 sec.1.8 sec.1.8 sec.1.5 sec.1.6 sec.
Significant height0.2m (0.7ft)0.3m (1ft)0.2m (0.7ft)0.1m (0.3ft)0.1m (0.3ft)0.1m (0.3ft)0.2m (0.7ft)0.1m (0.3ft)
Sea water temperature
Water temperature30°C (86°F)30°C (86°F)30°C (86°F)30°C (86°F)30°C (86°F)30°C (86°F)30°C (86°F)30°C (86°F)

Sea weather on Monday 16 June 2025

On Monday 16 June 2025, the sun will rise at 06:01 and will set at 18:41 on the beach(es) of Koh Madsum. The outside temperature will be a high of 86°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 8.1mph km/h (with gusts up to 12.4mph). Wave height will be up to 2ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature29°C (83°F)28°C (82°F)27°C (81°F)28°C (82°F)29°C (84°F)29°C (85°F)30°C (86°F)29°C (84°F)
Perceived temperature32°C (90°F)32°C (89°F)30°C (87°F)31°C (88°F)32°C (89°F)33°C (91°F)34°C (93°F)33°C (91°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity73%75%79%76%67%64%67%73%
Barometric pressure1010 hPa1009 hPa1010 hPa1011 hPa1010 hPa1008 hPa1008 hPa1010 hPa
Cloud cover18%13%83%73%31%27%41%80%
Heat index32°C (90°F)32°C (89°F)30°C (87°F)31°C (88°F)32°C (89°F)33°C (91°F)34°C (93°F)33°C (91°F)
Dew point23°C (74°F)23°C (74°F)23°C (74°F)23°C (74°F)22°C (72°F)22°C (71°F)23°C (73°F)23°C (74°F)
Wind
Speed5km/h (3mph)10km/h (6mph)13km/h (8mph)12km/h (7mph)12km/h (8mph)10km/h (6mph)4km/h (2mph)8km/h (5mph)
Gusts8km/h (5mph)15km/h (9mph)20km/h (13mph)16km/h (10mph)18km/h (11mph)16km/h (10mph)6km/h (4mph)13km/h (8mph)
Direction 242°
WSW
276°
W
269°
W
248°
WSW
267°
W
289°
WNW
345°
NNW
295°
WNW
Wind chill29°C (83°F)28°C (82°F)27°C (81°F)28°C (82°F)29°C (84°F)29°C (85°F)30°C (86°F)29°C (84°F)
Waves
Height0.6m (1.9ft)0.1m (0.3ft)0.6m (1.9ft)0.6m (2.0ft)0.4m (1.2ft)0.2m (0.6ft)0.1m (0.4ft)0.2m (0.6ft)
Direction 96°
E
318°
NW
314°
NW
237°
WSW
259°
WSW
278°
W
286°
WNW
255°
WSW
Period1.6 sec.1.6 sec.1.9 sec.1.9 sec.1.9 sec.1.9 sec.1.9 sec.1.9 sec.
Significant height0.2m (0.7ft)0.2m (0.7ft)0.2m (0.7ft)0.3m (1ft)0.2m (0.7ft)0.5m (1.6ft)0.3m (1ft)0.5m (1.6ft)
Sea water temperature
Water temperature28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)

Sea weather on Tuesday 17 June 2025

On Tuesday 17 June 2025, the sun will rise at 06:01 and will set at 18:42 on the beach(es) of Koh Madsum. The outside temperature will be a high of 86°F t and a low of 83°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 14.9mph km/h (with gusts up to 23mph). Wave height will be up to 1.3ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature29°C (83°F)28°C (82°F)28°C (82°F)29°C (83°F)29°C (84°F)30°C (85°F)29°C (85°F)28°C (83°F)
Perceived temperature32°C (90°F)31°C (88°F)31°C (88°F)32°C (90°F)32°C (90°F)34°C (92°F)34°C (93°F)32°C (90°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity72%74%75%72%71%66%74%75%
Barometric pressure1010 hPa1009 hPa1009 hPa1011 hPa1010 hPa1008 hPa1008 hPa1010 hPa
Cloud cover23%18%17%17%80%74%71%84%
Heat index32°C (90°F)31°C (88°F)31°C (88°F)32°C (90°F)32°C (90°F)34°C (92°F)34°C (93°F)32°C (90°F)
Dew point23°C (74°F)23°C (73°F)23°C (73°F)23°C (74°F)23°C (73°F)23°C (73°F)24°C (75°F)23°C (74°F)
Wind
Speed14km/h (9mph)18km/h (11mph)19km/h (12mph)19km/h (12mph)18km/h (11mph)12km/h (7mph)21km/h (13mph)24km/h (15mph)
Gusts21km/h (13mph)27km/h (17mph)28km/h (17mph)24km/h (15mph)27km/h (17mph)18km/h (11mph)33km/h (20mph)37km/h (23mph)
Direction 255°
WSW
247°
WSW
247°
WSW
245°
WSW
271°
W
305°
NW
314°
NW
252°
WSW
Wind chill29°C (83°F)28°C (82°F)28°C (82°F)29°C (83°F)29°C (84°F)30°C (85°F)29°C (85°F)28°C (83°F)
Waves
Height0.2m (0.8ft)0.3m (0.9ft)0.2m (0.8ft)0.3m (1.0ft)0.4m (1.2ft)0.2m (0.8ft)0.3m (0.9ft)0.4m (1.3ft)
Direction 249°
WSW
245°
WSW
245°
WSW
243°
WSW
265°
W
309°
NW
287°
WNW
244°
WSW
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)0.7m (2.3ft)0.6m (2ft)0.8m (2.6ft)0.9m (3ft)0.6m (2ft)0.8m (2.6ft)1.0m (3.3ft)
Sea water temperature
Water temperature28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)

Sea weather on Wednesday 18 June 2025

On Wednesday 18 June 2025, the sun will rise at 06:02 and will set at 18:42 on the beach(es) of Koh Madsum. The outside temperature will be a high of 85°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 16.2mph km/h (with gusts up to 23.6mph). Wave height will be up to 1.3ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature28°C (82°F)27°C (81°F)27°C (81°F)28°C (82°F)28°C (83°F)29°C (85°F)29°C (84°F)28°C (82°F)
Perceived temperature31°C (88°F)31°C (87°F)31°C (87°F)32°C (89°F)31°C (88°F)33°C (92°F)33°C (91°F)31°C (88°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity76%78%79%75%71%69%71%73%
Barometric pressure1010 hPa1008 hPa1009 hPa1010 hPa1009 hPa1007 hPa1007 hPa1009 hPa
Cloud cover24%47%52%63%26%63%84%46%
Heat index31°C (88°F)31°C (87°F)31°C (87°F)32°C (89°F)31°C (88°F)33°C (92°F)33°C (91°F)31°C (88°F)
Dew point23°C (74°F)23°C (74°F)23°C (74°F)23°C (74°F)22°C (72°F)23°C (73°F)23°C (74°F)23°C (73°F)
Wind
Speed26km/h (16mph)24km/h (15mph)23km/h (14mph)26km/h (16mph)22km/h (13mph)20km/h (12mph)24km/h (15mph)24km/h (15mph)
Gusts38km/h (24mph)35km/h (22mph)33km/h (20mph)34km/h (21mph)32km/h (20mph)28km/h (18mph)35km/h (22mph)35km/h (22mph)
Direction 243°
WSW
248°
WSW
248°
WSW
252°
WSW
265°
W
267°
W
261°
W
266°
W
Wind chill28°C (82°F)27°C (81°F)27°C (81°F)28°C (82°F)28°C (83°F)29°C (85°F)29°C (84°F)28°C (82°F)
Waves
Height0.4m (1.3ft)0.4m (1.2ft)0.3m (1.0ft)0.3m (1.1ft)0.3m (1.1ft)0.3m (1.0ft)0.2m (0.8ft)0.2m (0.8ft)
Direction 238°
WSW
243°
WSW
243°
WSW
244°
WSW
260°
W
284°
WNW
285°
WNW
267°
W
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 height1.0m (3.3ft)0.9m (3ft)0.7m (2.3ft)0.9m (3ft)0.9m (3ft)0.8m (2.6ft)0.6m (2ft)0.6m (2ft)
Sea water temperature
Water temperature28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)

Sea weather on Thursday 19 June 2025

On Thursday 19 June 2025, the sun will rise at 06:02 and will set at 18:42 on the beach(es) of Koh Madsum. The outside temperature will be a high of 85°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 14.3mph km/h (with gusts up to 21.1mph). Wave height will be up to 1ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature28°C (82°F)27°C (81°F)27°C (81°F)28°C (82°F)28°C (82°F)29°C (84°F)29°C (83°F)28°C (83°F)
Perceived temperature31°C (87°F)31°C (87°F)30°C (86°F)31°C (88°F)31°C (87°F)32°C (90°F)32°C (90°F)32°C (89°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity75%76%78%73%70%67%70%72%
Barometric pressure1009 hPa1008 hPa1008 hPa1010 hPa1010 hPa1007 hPa1008 hPa1009 hPa
Cloud cover48%22%52%43%37%25%32%36%
Heat index31°C (87°F)31°C (87°F)30°C (86°F)31°C (88°F)31°C (87°F)32°C (90°F)32°C (90°F)32°C (89°F)
Dew point23°C (73°F)23°C (73°F)23°C (73°F)23°C (73°F)22°C (72°F)22°C (72°F)23°C (73°F)23°C (73°F)
Wind
Speed21km/h (13mph)21km/h (13mph)21km/h (13mph)22km/h (14mph)23km/h (15mph)22km/h (14mph)19km/h (12mph)16km/h (10mph)
Gusts29km/h (18mph)28km/h (17mph)30km/h (18mph)29km/h (18mph)34km/h (21mph)32km/h (20mph)27km/h (17mph)24km/h (15mph)
Direction 266°
W
258°
WSW
251°
WSW
256°
WSW
256°
WSW
272°
W
256°
WSW
257°
WSW
Wind chill28°C (82°F)27°C (81°F)27°C (81°F)28°C (82°F)28°C (82°F)29°C (84°F)29°C (83°F)28°C (83°F)
Waves
Height0.3m (1.0ft)0.2m (0.8ft)0.3m (0.9ft)0.2m (0.8ft)0.2m (0.5ft)0.1m (0.3ft)0.1m (0.5ft)0.2m (0.7ft)
Direction 271°
W
255°
WSW
255°
WSW
263°
W
268°
W
280°
W
296°
WNW
305°
NW
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 height0.8m (2.6ft)0.6m (2ft)0.6m (2ft)0.5m (1.6ft)0.4m (1.3ft)0.3m (1ft)0.4m (1.3ft)0.4m (1.3ft)
Sea water temperature
Water temperature30°C (86°F)30°C (86°F)30°C (86°F)30°C (86°F)30°C (86°F)30°C (86°F)30°C (86°F)30°C (86°F)

Sea weather on Friday 20 June 2025

On Friday 20 June 2025, the sun will rise at 06:02 and will set at 18:42 on the beach(es) of Koh Madsum. The outside temperature will be a high of 86°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 14.9mph km/h (with gusts up to 22.4mph). Wave height will be up to 0.7ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature28°C (82°F)28°C (82°F)27°C (81°F)28°C (82°F)29°C (84°F)29°C (85°F)29°C (84°F)28°C (83°F)
Perceived temperature31°C (88°F)31°C (87°F)30°C (86°F)31°C (88°F)33°C (91°F)33°C (92°F)33°C (91°F)31°C (89°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity73%75%76%73%69%68%69%72%
Barometric pressure1009 hPa1008 hPa1008 hPa1009 hPa1008 hPa1007 hPa1007 hPa1009 hPa
Cloud cover31%26%27%27%29%52%63%57%
Heat index31°C (88°F)31°C (87°F)30°C (86°F)31°C (88°F)33°C (91°F)33°C (92°F)33°C (91°F)31°C (89°F)
Dew point23°C (73°F)23°C (73°F)23°C (73°F)23°C (73°F)23°C (73°F)23°C (73°F)23°C (73°F)23°C (73°F)
Wind
Speed17km/h (11mph)20km/h (12mph)18km/h (11mph)21km/h (13mph)23km/h (14mph)21km/h (13mph)22km/h (14mph)24km/h (15mph)
Gusts26km/h (16mph)28km/h (17mph)26km/h (16mph)28km/h (18mph)32km/h (20mph)31km/h (19mph)32km/h (20mph)36km/h (22mph)
Direction 257°
WSW
258°
WSW
249°
WSW
245°
WSW
255°
WSW
258°
WSW
258°
WSW
245°
WSW
Wind chill28°C (82°F)28°C (82°F)27°C (81°F)28°C (82°F)29°C (84°F)29°C (85°F)29°C (84°F)28°C (83°F)
Waves
Height0.2m (0.7ft)0.2m (0.7ft)0.2m (0.7ft)0.2m (0.7ft)0.2m (0.7ft)0.2m (0.7ft)0.2m (0.7ft)0.2m (0.7ft)
Direction 299°
WNW
287°
WNW
271°
W
258°
WSW
264°
W
290°
WNW
306°
NW
303°
WNW
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 height0.5m (1.6ft)0.6m (2ft)0.6m (2ft)0.6m (2ft)0.4m (1.3ft)0.4m (1.3ft)0.5m (1.6ft)0.4m (1.3ft)
Sea water temperature
Water temperature30°C (86°F)30°C (86°F)30°C (86°F)30°C (86°F)30°C (86°F)30°C (86°F)30°C (86°F)30°C (86°F)

Sea weather on Saturday 21 June 2025

On Saturday 21 June 2025, the sun will rise at 06:02 and will set at 18:43 on the beach(es) of Koh Madsum. 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 16.8mph km/h (with gusts up to 24.2mph). Wave height will be up to 1ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature28°C (82°F)27°C (81°F)27°C (80°F)27°C (81°F)27°C (81°F)27°C (81°F)28°C (82°F)27°C (81°F)
Perceived temperature31°C (87°F)30°C (86°F)29°C (85°F)30°C (86°F)30°C (86°F)31°C (87°F)31°C (87°F)30°C (86°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity74%77%80%77%77%76%75%75%
Barometric pressure1009 hPa1008 hPa1008 hPa1010 hPa1009 hPa1007 hPa1008 hPa1009 hPa
Cloud cover57%70%60%59%56%47%66%82%
Heat index31°C (87°F)30°C (86°F)29°C (85°F)30°C (86°F)30°C (86°F)31°C (87°F)31°C (87°F)30°C (86°F)
Dew point23°C (73°F)23°C (73°F)23°C (73°F)23°C (73°F)23°C (73°F)23°C (73°F)23°C (73°F)23°C (73°F)
Wind
Speed22km/h (14mph)21km/h (13mph)21km/h (13mph)22km/h (14mph)23km/h (14mph)24km/h (15mph)24km/h (15mph)27km/h (17mph)
Gusts33km/h (21mph)32km/h (20mph)31km/h (19mph)35km/h (21mph)35km/h (21mph)36km/h (22mph)35km/h (21mph)39km/h (24mph)
Direction 235°
SW
228°
SW
216°
SW
219°
SW
233°
SW
248°
WSW
253°
WSW
246°
WSW
Wind chill28°C (82°F)27°C (81°F)27°C (80°F)27°C (81°F)27°C (81°F)27°C (81°F)28°C (82°F)27°C (81°F)
Waves
Height0.2m (0.7ft)0.2m (0.7ft)0.2m (0.7ft)0.2m (0.7ft)0.2m (0.7ft)0.2m (0.7ft)0.2m (0.7ft)0.3m (1.0ft)
Direction 286°
WNW
263°
W
239°
WSW
230°
SW
229°
SW
262°
W
283°
WNW
274°
W
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 height0.5m (1.6ft)0.5m (1.6ft)0.5m (1.6ft)0.4m (1.3ft)0.3m (1ft)0.4m (1.3ft)0.6m (2ft)0.7m (2.3ft)
Sea water temperature
Water temperature30°C (86°F)30°C (86°F)30°C (86°F)30°C (86°F)30°C (86°F)30°C (86°F)30°C (86°F)30°C (86°F)

Sea weather chart over the next 7 days

Outside temperature

Wind speed

Precipitation

Wave height

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