Koh Samui
Gulf-side alternative to Phuket. Seasons flipped — October–November are the wettest.
A wet week ahead. Plan indoor backups.
Days 1–5 are usually reliable, 6–10 drift, 11–14 are the model guessing. Check again the day before you fly — more on what this can and can't do.
When to go
From the 2026 climate study, not the live forecast.Gulf-side schedule is flipped from Phuket — driest February through September, wettest October–November (480–560 mm in November). The longest dry-stretch swim destination in mainland SE Asia. Calmer ferry crossings than the Andaman side.
Pre-filled from New York, 2026-05-13 – 2026-05-20.
One search across the aggregators if you want to price-check.
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