Is August a good month to go to Koh Samui?

Yes. Koh Samui is one of the best choices in Thailand during August. The northeast coast of the island is sheltered from the southwest monsoon that hammers the Andaman coast. You will see some afternoon showers but generally warm, mostly sunny conditions. Prices are moderate compared to peak season (December–January).

Can you visit waterfalls in Thailand during the rainy season?

Absolutely — the rainy season is actually the best time to see Thai waterfalls. Erawan Falls (Kanchanaburi), Thi Lo Su (Tak Province), and Mae Klang Falls (Chiang Mai) are at their most powerful and beautiful from July to October. Check access conditions before visiting as some trails close during heavy rain.

Monthly Travel Guide

Thailand in August

August continues the summer low season pattern: wet on the Andaman coast, largely dry on the Gulf coast. European visitors swell numbers on Koh Samui and Koh Phangan despite it not being peak season. Northern Thailand is at its most verdant and beautiful, with fewer tourists than during the cool season. Prices across the country remain at low-season levels except on the Gulf islands. Queen Mother's Birthday is celebrated on 12 August.

Weather by Region

North (Chiang Mai)

Rainy and green. Chiang Mai 24–32°C. Rain typically comes in afternoon bursts. Trekking is possible but trails can be muddy.

Central (Bangkok)

Bangkok experiences regular rain with occasional flooding in low-lying areas. Temperatures 27–33°C. Humidity is high.

South — Gulf Coast

Generally dry and warm. Koh Samui and Koh Phangan see warm conditions though some afternoon showers are possible.

South — Andaman Coast

Monsoon continues. Phuket and Krabi see heavy rain and rough seas. Limited beach activity possible on calm mornings.

Best Destinations in August

Koh Samui

Reliably good weather on the Gulf coast while everywhere else is wet.

Chiang Rai

Lush green season scenery; the White Temple (Wat Rong Khun) and Blue Temple look spectacular in verdant surroundings.

Kanchanaburi

Waterfalls and river scenery are at their best in the rainy season. Erawan Falls runs at full force.

Where to Avoid in August

Koh Lipe

Remote Andaman island with rough seas; ferry service unreliable or suspended.

Festivals & Events

Queen Mother's Birthday / Mother's Day

12 August

The birthday of Queen Sirikit, revered as the Mother of the Nation, is a national public holiday also celebrated as Mother's Day in Thailand. Illuminations and ceremonies take place in Bangkok around the Royal Palace area.