25.08
tue
tue
Day
82°F
E 12 mph
Precip.
20%
20%
Night
82°F
E 18 mph
Precip.
18%
18%
26.08
wed
wed
Day
82°F
SE 9 mph
Precip.
18%
18%
Night
84°F
E 20 mph
Precip.
19%
19%
27.08
thu
thu
Day
84°F
E 18 mph
Precip.
16%
16%
Night
82°F
NE 22 mph
Precip.
19%
19%
28.08
fri
fri
Day
84°F
E 18 mph
Precip.
23%
23%
Night
82°F
E 21 mph
Precip.
22%
22%
29.08
sat
sat
Day
84°F
E 25 mph
Precip.
19%
19%
Night
82°F
E 21 mph
Precip.
20%
20%
30.08
sun
sun
Day
84°F
E 15 mph
Precip.
17%
17%
Night
82°F
NE 24 mph
Precip.
30%
30%
31.08
mon
mon
Day
84°F
E 27 mph
Precip.
19%
19%
Night
84°F
E 24 mph
Precip.
20%
20%
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 85.9°F. The highest and lowest sea temperatures during the month were 86.4°F and 85.3°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 84.9°F. The highest and lowest sea temperatures during the month were 85.8°F and 83.8°F.
Air temperature in Samui, °F
Precipitation total in Samui, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Samui
Samui on a weather map
Places in Thailand:
Name
°F
24 Hours Forecast
Samui
Local time: 20:35
August 25, tuesday
2100
84°F
E
19 mph
19 mph
August 26, wednesday
0000
82°F
E
18 mph
18 mph
0300
82°F
E
19 mph
19 mph
0600
82°F
E
19 mph
19 mph
0900
82°F
E
16 mph
16 mph
1200
82°F
SE
9 mph
9 mph
1500
84°F
E
19 mph
19 mph
1800
86°F
E
22 mph
22 mph
