Ko Si Boya
Island Small southern Thai island with tropical beaches
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
Monthly Conditions
January
Weather
2.1
UV Index
Extreme
11.6h daylight
February
Weather
2.5
UV Index
Extreme
11.8h daylight
March
Weather
2.6
UV Index
Extreme
12.0h daylight
April
Weather
2.5
UV Index
Extreme
12.2h daylight
May
Weather
2.1
UV Index
Extreme
12.3h daylight
June
Weather
2.1
UV Index
Extreme
12.4h daylight
July
Weather
2.1
UV Index
Extreme
12.4h daylight
August
Weather
2.2
UV Index
Extreme
12.2h daylight
September
Weather
2.2
UV Index
Extreme
12.1h daylight
October
Weather
2.1
UV Index
Extreme
11.8h daylight
November
Weather
1.9
UV Index
Very High
11.7h daylight
December
Weather
1.9
UV Index
Very High
11.6h daylight
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