Ko Samui Weather in August

August weather

Ko Samui feels warm and very damp in August. The high is 29°C and the low is 27°C, with high humidity and little sunshine. Rain falls on many days, though showers don't always last all day. July and September are wetter, so August is a slightly less rainy choice within this stretch.

You can still explore Big Buddha and Fisherman's Village between showers, or enjoy a long lunch of seafood and coconut curry. But don't count on clear skies for beach days or far-reaching views. If you're hoping to kayak around Ang Thong Marine Park, keep your plans flexible; rough weather can affect boat trips.

Events and crowds

August 12 is Mother's Day in Thailand, which also marks Queen Sirikit's birthday. You may see flags and decorations, especially around temples and public spaces, but it's not a major island festival.

Travelling with kids? August's European school holidays can bring more families than you'll find in the wetter months. Still, it's generally quieter than February, one of Ko Samui's best-weather months. Prices are often lower than in February, though popular family resorts may stay busy.

Make the most of it

Treat August as a flexible island break, not a guaranteed run of beach weather. Keep a temple visit or a meal in Bophut ready for a rainy afternoon. For a local meal, try khao yam, a southern Thai rice salad, at Fisherman's Village.

For boat trips, ask your hotel or operator about sea conditions before setting out. That's especially useful for Ang Thong, where a cancelled trip can change your day's plans. Even when the sun stays behind clouds, warm evenings make a stroll along Bophut's waterfront an easy way to end the day.