Measurements:
°C
°F
CURRENT WEATHER
09:49
Samui
86°F
NE 7 mph
Feels like: 94°F
Precip: 32%
World Resorts Thailand Samui Weather

7 Day Weather Forecast

09.14
mon
DAY
88°F
E 13 mph
precip
20%
NIGHT
86°F
NW 1 mph
precip
18%
09.15
tue
DAY
86°F
NE 2 mph
precip
29%
NIGHT
88°F
N 6 mph
precip
34%
09.16
wed
DAY
86°F
E 8 mph
precip
22%
NIGHT
88°F
E 2 mph
precip
45%
09.17
thu
DAY
88°F
E 5 mph
precip
16%
NIGHT
86°F
E 21 mph
precip
78%
09.18
fri
DAY
86°F
E 25 mph
precip
33%
NIGHT
84°F
NE 22 mph
precip
22%
09.19
sat
DAY
86°F
NE 11 mph
precip
29%
NIGHT
84°F
N 12 mph
precip
54%
09.20
sun
DAY
82°F
N 11 mph
precip
77%
NIGHT
86°F
N 8 mph
precip
23%

Samui Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Samui was 29.4°F. The maximum and minimum values were 28.8°F and 29.9°F respectively.

Samui on the Weather Map

Best Time to Visit Samui
The most sunny months:
April 18 days
May 14 days
March 14 days
The most warm months:
May 92.3 °F
June 91.8 °F
July 91.1 °F
Warmest sea temperature:
May 91.6 °F
April 90.6 °F
June 90.6 °F
The most cold months:
January 86.7 °F
February 87.0 °F
December 87.3 °F
The most rainy months:
November 15 days
October 11 days
December 9 days
The most windy months:
July 12 mph
September 12 mph
August 11 mph
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