Weather in Koh Phangan in May
Warm and mostly sunny with some afternoon showers beginning to appear as the pre-monsoon season starts. Average temperatures of 28–32°C. Gulf of Thailand seas are generally calm in May, with good swimming conditions. Rainfall is moderate — around 100–150 mm — typically in short afternoon or evening bursts. Nothing like the sustained monsoon conditions that affect the Andaman coast.
Crowds & Prices
Shoulder season. The March–April European spring break crowds have thinned. Full Moon Party attendance is moderate rather than peak (peak is December–March). Accommodation is available at competitive rates. The yoga, wellness, and digital nomad communities remain active year-round, giving the island a pleasantly purposeful vibe outside the party scene.
Best Things to Do in May
- 1Full Moon Party at Haad Rin — one of Thailand's most famous parties, held monthly on the full moon
- 2Snorkelling at Koh Ma — the reef connecting Koh Ma to the main island is excellent in May, with warm clear water
- 3Yoga and wellness retreats — Koh Phangan has one of Asia's densest concentrations of retreat centres, all fully operational in May
- 4Kayaking around the north coast — calm seas in May make the circumnavigation trips reliably available
Travel Tips for May
Book Full Moon Party accommodation 2–3 weeks in advance — even in shoulder season the best spots near Haad Rin fill quickly around the full moon.
May seas are generally calm for the half-day snorkel boat trips — confirm with operators on the morning of your trip.
The wellness scene (yoga, meditation retreats) offers some of its best pricing in May — good time for a longer retreat stay.
Disclaimer
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