Measurements:
°C
°F
CURRENT WEATHER
19:51
Samui
84°F
SW 13 mph
Feels like: 90°F
Precip: 100%
World Resorts Thailand Samui Weather

7 Day Weather Forecast

12.15
mon
DAY
84°F
SW 20 mph
precip
100%
NIGHT
82°F
W 11 mph
precip
100%
12.16
tue
DAY
82°F
SW 9 mph
precip
100%
NIGHT
82°F
SW 7 mph
precip
100%
12.17
wed
DAY
84°F
SW 4 mph
precip
100%
NIGHT
82°F
SW 2 mph
precip
100%
12.18
thu
DAY
84°F
W 6 mph
precip
77%
NIGHT
84°F
SW 4 mph
precip
0%
12.19
fri
DAY
84°F
S 4 mph
precip
0%
NIGHT
84°F
S 4 mph
precip
0%
12.20
sat
DAY
84°F
S 6 mph
precip
0%
NIGHT
84°F
SW 4 mph
precip
0%
12.21
sun
DAY
84°F
S 9 mph
precip
0%
NIGHT
84°F
SW 4 mph
precip
0%

Samui Sea Water Temperature in December, °F

Select Year: 2025 2024 2023

The average sea surface temperature in December 2025 for Samui was 27.4°F. The maximum and minimum values were 27.1°F and 27.8°F respectively.

Samui on the Weather Map

Best Time to Visit Samui
The most sunny months:
April 17 days
March 15 days
May 14 days
The most warm months:
May 92.6 °F
June 92.0 °F
July 91.3 °F
Warmest sea temperature:
May 91.6 °F
April 90.6 °F
June 90.6 °F
The most cold months:
January 86.9 °F
February 87.2 °F
December 87.6 °F
The most rainy months:
November 15 days
October 11 days
December 10 days
The most windy months:
July 12 mph
September 12 mph
December 12 mph
more details