14.09
mon
mon
Day
84°F
E 5 mph
Precip.
30%
30%
Night
82°F
E 2 mph
Precip.
57%
57%
15.09
tue
tue
Day
82°F
W 1 mph
Precip.
19%
19%
Night
82°F
NW 4 mph
Precip.
18%
18%
16.09
wed
wed
Day
82°F
E 6 mph
Precip.
17%
17%
Night
84°F
E 11 mph
Precip.
11%
11%
17.09
thu
thu
Day
84°F
E 9 mph
Precip.
9%
9%
Night
82°F
E 27 mph
Precip.
64%
64%
18.09
fri
fri
Day
82°F
E 19 mph
Precip.
26%
26%
Night
81°F
NE 22 mph
Precip.
35%
35%
19.09
sat
sat
Day
82°F
N 8 mph
Precip.
45%
45%
Night
82°F
NE 9 mph
Precip.
26%
26%
20.09
sun
sun
Day
82°F
NW 4 mph
Precip.
21%
21%
Night
81°F
N 2 mph
Precip.
23%
23%
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: 21:07
September 15, tuesday
0000
82°F
E
2 mph
2 mph
0300
81°F
NW
1 mph
1 mph
0600
82°F
N
4 mph
4 mph
0900
82°F
NE
3 mph
3 mph
1200
82°F
W
1 mph
1 mph
1500
84°F
W
9 mph
9 mph
1800
84°F
SW
3 mph
3 mph
2100
82°F
W
2 mph
2 mph
