World Resorts Thailand Samui Weather

Samui 7 Days Forecast

17.05
sun
Day
84°F
E 20 mph
Precip.
0%
Night
84°F
E 20 mph
Precip.
0%
18.05
mon
Day
84°F
E 23 mph
Precip.
100%
Night
82°F
E 21 mph
Precip.
100%
19.05
tue
Day
82°F
E 25 mph
Precip.
100%
Night
84°F
NE 19 mph
Precip.
0%
20.05
wed
Day
86°F
E 16 mph
Precip.
100%
Night
84°F
NE 18 mph
Precip.
0%
21.05
thu
Day
84°F
E 17 mph
Precip.
66%
Night
84°F
NE 15 mph
Precip.
0%
22.05
fri
Day
86°F
NE 3 mph
Precip.
0%
Night
86°F
N 9 mph
Precip.
100%
23.05
sat
Day
86°F
E 6 mph
Precip.
55%
Night
86°F
NE 14 mph
Precip.
21%

Sea water temperature in May, °F

Show year:
2026
2025
2024

The average sea water temperature in May of 2026 was 87.2°F. The highest and lowest sea temperatures during the month were 87.6°F and 86.5°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

Sunniest months:
April 18 days
May 14 days
March 14 days
Warmest months:
May 88.3 °F
June 87.8 °F
July 87.1 °F
Warmest sea temp:
May 87.4 °F
April 86.6 °F
June 86.5 °F
Coldest months:
January 83.0 °F
February 83.3 °F
December 83.6 °F
Rainiest months:
November 15 days
October 11 days
December 9 days
Windiest months:
July 12.3 mph
September 11.9 mph
December 11.6 mph

Samui on a weather map

Current weather
06:29
Samui
+82°F
E 17 mph
Feels like: +90°F
Precip.: 100%
Places in Thailand:
Name
°F
Bang Tao Beach
+81°F
Bangkok
+84°F
Khao Lak
+81°F
Karon Beach
+81°F
Kata Beach
+81°F
Samet
+82°F
Koh Chang
+82°F
Nai Yang Beach
+81°F
Phangan
+82°F
Patong Beach
+81°F
Pattaya
+82°F
Phi Phi
+86°F
Phuket
+81°F
Samui
+82°F
Hua Hin
+82°F
all places
24 Hours Forecast
Samui
Local time: 06:29
May 17, sunday
0900
84°F
E
16 mph
1200
84°F
E
20 mph
1500
84°F
E
21 mph
1800
84°F
E
24 mph
2100
84°F
E
22 mph
May 18, monday
0000
84°F
E
20 mph
0300
84°F
E
16 mph
0600
82°F
E
16 mph
Units of measurement: °C / °F