Weather and Tide Forecast for the Gulf of Thailand (Samui/Phangan/Tao/Surat Thani)

Gulf of Thailand Weather Forecast (Samui/Pha Ngan/Tao/Surat Thani) May 12–18, 2025.

Monday, May 12

Temperature: High 34°C / Low 27°C
Weather: Rainy
Sailing Conditions: Wave height ~0.7m
Tides: Low at 7:38 AM (0.97m), High at 11:31 PM (2.29m)

Tuesday, May 13

Temperature: High 33°C / Low 27°C
Weather: Cloudy with afternoon rain
Sailing Conditions: Wave height ~0.7m
Tides: Low at 8:20 AM, High at 12:10 AM 

Wednesday, May 14

Temperature: High 33°C / Low 26°C
Weather: Cloudy with afternoon rain
Sailing Conditions: Wave height ~0.7m
Tides: Low at 9:00 AM, High at 12:50 AM 

Thursday, May 15

Temperature: High 32°C / Low 27°C
Weather: Mostly cloudy with light rain
Sailing Conditions: Wave height ~0.7m
Tides: Low at 9:40 AM, High at 1:30 AM 

Friday, May 16

Temperature: High 32°C / Low 27°C
Weather: Cloudy with afternoon rain
Sailing Conditions: Wave height ~0.7m
Tides: Low at 10:20 AM, High at 2:10 AM 

Saturday, May 17

Temperature: High 33°C / Low 27°C
Weather: Mostly cloudy with passing showers
Sailing Conditions: Wave height ~0.7m
Tides: Low at 11:00 AM, High at 2:50 AM 

Sunday, May 18

Temperature: High 33°C / Low 27°C
Weather: Mostly cloudy
Sailing Conditions: Wave height ~0.7m
Tides: Low at 11:40 AM, High at 3:30 AM