Measurements:
°C
°F
Samui
86°F
E 15 mph
Feels like: 94°F
Precip: 100%
World Resorts Thailand Samui Weather

Samui Sea Water Temperature

Current Sea Water Temperature:
+89.6°F
Maximum Sea Water Temperature in June: 93.2°F
Minimum Sea Water Temperature in June: 86.4°F
Average water temperature in June: 90.6°F

Sea Water Temperature for the Last 10 Days:

June 23 89.6°F June 18 90.4°F
June 22 89.8°F June 17 90.8°F
June 21 89.8°F June 16 90.0°F
June 20 89.6°F June 15 90.0°F
June 19 89.8°F June 14 89.8°F

When is the Warmest Sea for Samui?

According to our data for the last three years for Samui the highest average sea water temperature was in May, April and June.

Average Water Temperature by Month, °F

Sea Water Temperature in May

Select Year: 2025 2024 2023

The average sea surface temperature in May 2025 for Samui was 91.3°F. The maximum and minimum values were 90.6°F and 91.8°F respectively.

Sea Water Temperature in April

Select Year: 2025 2024 2023

The average sea surface temperature in April 2025 for Samui was 90.5°F. The maximum and minimum values were 88.4°F and 92.6°F respectively.

Sea Water Temperature in June

Select Year: 2025 2024 2023

The average sea surface temperature in June 2025 for Samui was 90.3°F. The maximum and minimum values were 89.6°F and 91.0°F respectively.

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 92.3 °F
July 91.5 °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
December 12 mph
September 11 mph

Samui on the Weather Map

Thailand Resorts:
NAME
Bang Tao Beach +86
Bangkok +86
Hua Hin +80
Karon Beach +86
Kata Beach +86
Khao Lak +82
Koh Chang +84
Krabi +84
Patong Beach +86
Pattaya +84
Phangan +86
Phi Phi +88
Phuket +86
Samet +84
Samui +86
24 Hours Weather Forecast
Samui
Local time: 11:34
24 jun, tuesday
1200 86°F
E
15 mph
1500 88°F
E
15 mph
1800 88°F
E
14 mph
2100 88°F
E
14 mph
25 jun, wednesday
0000 88°F
NE
13 mph
0300 86°F
E
14 mph
0600 86°F
E
14 mph
0900 86°F
E
13 mph