April · Thailand weather
Thailand in April: Weather, What to Expect & Where to Go
April is brutally hot — Bangkok and Isaan regularly hit 35°C+. But it's also Songkran (13–15 April), the Thai New Year water festival, which is genuinely one of the best cultural experiences on the planet. Plan around the heat, plan around Songkran.
Best region
Gulf
Koh Samui, Phangan, and Tao are at their absolute peak — hot, dry, and bright.
Avoid
Northeast
Isaan bakes — 31°C+ averages with little rain to break the heat.
Heat warning (nationwide)
April is the hottest month of the year. Heat exhaustion is a real risk — plan indoor afternoons, drink twice as much water as you think you need, and skip midday temple visits.
April weather, region by region
Average temperatures and rainfall across Thailand's five climate regions in April. Tap the climate map on the homepage for an interactive month-by-month view.
| Region | Avg temp | Rainfall | Visit rating |
|---|---|---|---|
North Chiang Mai | 30°C | 75mm | AQI watch |
Northeast Nakhon Ratchasima (Korat) | 31°C | 80mm | AQI watch |
Central Bangkok | 31°C | 85mm | Good |
Andaman Phuket | 30°C | 140mm | Great |
Gulf Koh Samui | 30°C | 85mm | Great |
City spotlights
One city per region — what April actually feels like on the ground, and what to do or skip.
North
Chiang Mai
Air quality starts to clear toward month-end as the first storms break. Songkran in the old city moat is iconic — possibly the best in the country.
Year-round climate
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Northeast
Nakhon Ratchasima (Korat)
Isaan bakes. Korat regularly hits 35°C+ with little rain, and Phimai is brutal at midday. Local Songkran celebrations are smaller and more low-key than Chiang Mai's, but a welcome relief from the heat.
Year-round climate
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Central
Bangkok
Hot enough to be uncomfortable, but Songkran in Silom and Khao San is unmissable. Plan everything else around early mornings and air-conditioning.
Year-round climate
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Andaman
Phuket
Last reliable month before the monsoon arrives — short afternoon showers are becoming more common, but mornings are still bright.
Year-round climate
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Gulf
Koh Samui
Peak beach weather on the Gulf side. Hot, dry, and consistently sunny — Samui and Phangan are at their best now.
Year-round climate
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Events & festivals in April
Songkran (Thai New Year)
13–15 April. Nationwide water-fight festival — Chiang Mai's old city, Bangkok's Khao San and Silom, and the Songkran on Phuket are the big three. Expect to get soaked from the moment you leave your hotel.
Is April a good time to visit Thailand?
April is a great cultural month and a tough weather month. If you can time your trip around Songkran (April 13–15), the heat is worth tolerating. Otherwise, look at February, November, or December instead.
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Thailand in March
Andaman beaches, Gulf islands warming up
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Thailand in May
Gulf islands, fewer crowds, lower prices
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