Ang Thong National Marine Park
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When to go
Where the weather works in June, and where to skip.
Mostly dry on the Gulf islands.
Green season. Afternoon storms, fewer visitors.
Rice planting starts. Green and humid.
Rainy season. Short heavy afternoon storms.
Monsoon. Many island resorts and boats cut back or close.
Monsoon. Rough seas; some island boats stop.
Many festival dates follow the lunar calendar. Check this year's dates before you book.
It is a mixed month. Gulf coast (Samui, Pha Ngan, Tao, Songkhla) is your best bet: Mostly dry on the Gulf islands.
Phi Ta Khon (Ghost Festival) in Dan Sai, Loei (June or July; dates are set each year by local mediums)
General climate patterns from the Thai Meteorological Department (tmd.go.th). Weather varies year to year; treat this as a guide, not a forecast.