August · Thailand weather
Thailand in August: Weather, What to Expect & Where to Go
August is mid-monsoon almost everywhere except the Gulf — and yet it's one of the busiest months because of European school holidays. Expect rain, but also high prices on the Andaman despite the weather.
Best region
Gulf
Samui's dry pattern continues — still the most reliable beach option.
Avoid
Andaman
Heavy rain, but high European-holiday pricing despite the weather.
Good for
Gulf islands, cultural Bangkok
August weather, region by region
Average temperatures and rainfall across Thailand's five climate regions in August. Tap the climate map on the homepage for an interactive month-by-month view.
| Region | Avg temp | Rainfall | Visit rating |
|---|---|---|---|
North Chiang Mai | 27°C | 210mm | Good |
Northeast Nakhon Ratchasima (Korat) | 28°C | 240mm | Good |
Central Bangkok | 29°C | 190mm | Good |
Andaman Phuket | 28°C | 360mm | Good |
Gulf Koh Samui | 29°C | 110mm | Great |
City spotlights
One city per region — what August actually feels like on the ground, and what to do or skip.
North
Chiang Mai
Wet and lush. Cooking classes, café-hopping, and indoor markets are at their best. The mountains are green and dramatic between storms.
Year-round climate
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Northeast
Nakhon Ratchasima (Korat)
Quiet, green, and atmospheric. Khao Yai sees almost no foreign tourists this month — a long weekend from Bangkok gets you wildlife, waterfalls, and empty viewpoints.
Year-round climate
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Central
Bangkok
Hot, humid, and prone to flash floods. Stick to BTS-connected neighbourhoods and accept indoor afternoons.
Year-round climate
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Andaman
Phuket
Rainy and rough, with European-holiday pricing. Worst value of the year.
Year-round climate
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Gulf
Koh Samui
Still on the dry calendar. Hot, bright, and reliable — your best beach bet in August.
Year-round climate
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Events & festivals in August
Queen's Birthday / Mother's Day (12 August)
Bangkok lights up with portraits of HM Queen Sirikit and floral tributes. Schools and offices close — markets are quieter than usual.
Is August a good time to visit Thailand?
Only if you're flexible. Skip the Andaman coast on a budget, head to the Gulf or the north, and accept that big-city sightseeing will involve rain.
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Thailand in July
Isaan candle festivals, Gulf beaches, Chiang Mai
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Thailand in September
Cheap flights, Phuket Vegetarian Festival, quiet temple visits
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