Measurements:
°C
°F
Samui
86°F
E 16 mph
Feels like: 94°F
Precip: 76%
World Resorts Thailand Samui Weather May Weather in Samui

Samui Weather: May

Average Day Temperature: 92.6°F
Average Night Temperature: 88.9°F
Sea Water Temperature: 91.6°F
Number of Sunny Days: 14 days
Sunshine Hours: 12.5 - 12.6 hours
Number of Rainy Days: 8 days
Precipitation Totals: 3.3 in

Air Temperature in May, °F

Select Year: 2025 2024 2023

The highest day temperature in May 2025 was 90°F. The lowest night temperature was 83°F. The average values for day and night temperatures during May were 88.2°F и 87.6°F respectivly.

Samui Water Sea Temperature in May, °F

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.

Sunny, Cloudy and Gloomy days

Most of the days in May are sunny but you can also expect cloudy and gloomy days.

Precipitation Totals in May, in

Precipitation total in May for Samui is 3.3 in. It makes may one of the least rainy months of the year.

Wind Speed in May, mph

The average wind speed in May is 8.8 mph. It makes May one of the most windless months of the year for Samui.

Average Sunny Hours Per Day

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Samui in May is 8.1 hours.

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 +82
Hua Hin +84
Karon Beach +86
Kata Beach +86
Khao Lak +86
Koh Chang +82
Krabi +86
Patong Beach +86
Pattaya +84
Phangan +86
Phi Phi +86
Phuket +86
Samet +84
Samui +86
24 Hours Weather Forecast
Samui
Local time: 09:41
25 jun, wednesday
1200 88°F
E
14 mph
1500 90°F
E
8 mph
1800 88°F
E
10 mph
2100 88°F
E
8 mph
26 jun, thursday
0000 88°F
E
14 mph
0300 88°F
E
17 mph
0600 86°F
E
17 mph
0900 86°F
E
15 mph