Ko Si Boya Island
Small southern Thai island with tropical beaches
Ko Si Boya at a Glance#
Best Time to Visit Ko Si Boya#
Visit in the dry season (November-April) for the calmest seas and best snorkeling conditions.
Dry season
Nov-Apr · 25-32°C
Calm seas and good visibility for swimming and snorkeling; best overall time to visit.
Monsoon/wet season
May-Oct · 24-31°C
Frequent heavy rain and rough seas can limit boat access and water activities.
Weather & Climate near Ko Si Boya#
Climate
Air Quality:
AQI 54
Moderate
Temperature & Rainfall
Temperature Range
35°
Warmest Month
21°
Coldest Month