Similan Islands in March
Great time to visit
Excellent weather persists with marginally fewer tourists than peak months. Still premium pricing but you'll have slightly more breathing room on popular dive sites.
Weather
Dry season continues with brilliant sunshine and calm conditions. Temperatures start climbing but sea breezes keep things pleasant. Occasional brief showers possible but rare.
32°C high25°C low2 rain days
Crowds & Cost
high crowds
~$160/day average
Events & Festivals
- •Holi celebrations in nearby communities
- •Full Moon parties on Koh Phangan (affects regional tourism)
March Tips
- •March offers the best balance of good weather and slightly lower crowds
- •Whale shark sightings increase toward month-end
- •Pack extra water - dehydration hits fast on day trips
All Months
The islands close completely from May 15 to October 15 due to monsoon conditions. Your window runs November through April, with distinct seasons within that period. November and December offer the calmest seas and best visibility for diving - often 35-40 meters. But expect higher prices and crowds, especially around Christmas. January through March delivers the most reliable weather with minimal rain and gentle breezes. This is peak season, so book accommodations and liveaboards well ahead. April sees rising temperatures (35°C daily) and occasional afternoon storms, but fewer crowds and better deals. The shoulder months of late October and early May can be spectacular if weather cooperates, but you're gambling on conditions. Water temperature stays warm year-round at 27-29°C. Northeast monsoon winds from December to February can make some dive sites choppy, but generally create better visibility.
Similan Islands Scores
Solo
7/10
Couples
8/10
Families
6/10
Adventure
9/10
Budget
5/10
Luxury
7/10
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