When to Visit Koh Lanta — Seasons, Weather and Crowds

Koh Lanta has two seasons, and they shape almost everything about a stay here — from the sea state to which restaurants are open.

Dry season: November to April

This is peak season. Skies are mostly clear, the sea is calm, and the island is at its busiest — especially over Christmas and New Year, and again around Chinese New Year. Prices for short-term accommodation peak here too. If you’re planning a long-term rental starting in this window, it’s worth arranging viewings and paperwork well ahead, since this is also when owners are most in demand.

Rainy season: May to October

“Rainy” is a bit misleading — it doesn’t rain all day. Expect warm temperatures with shorter, heavier downpours, often in the afternoon, and more overcast stretches than the dry season. The sea is rougher, which is why some boat services reduce or pause (see our getting to Koh Lanta guide). Many restaurants, bars and smaller guesthouses close for weeks or months during the quietest stretch, typically around September–October.

This is also when the island is at its calmest and cheapest, and long-term rental availability tends to be better — worth knowing if you’re relocating rather than on holiday.

Shoulder months

Late October/November and April/May sit between the two seasons — often good value, with improving or still-decent weather and fewer crowds than peak season.

What this means for renting

• Booking a long lease: availability and choice are usually better outside December–February.
• Visiting to view a property first: the dry season makes viewing trips easier to plan, since ferries and transport run at full schedule.
• Budgeting for a holiday let: expect rainy-season rates to be noticeably lower than peak season for the same property.