Bangkok in April: what to expect

April is the tail of the hot season and the hottest month in Bangkok. Expect 35–38 °C in the afternoon, humidity that makes the heat feel heavier, and nights that rarely drop below the high twenties. The monsoon has not arrived, so rain is not the main story — but late April often brings the first short, heavy afternoon storms, which cool the streets for an hour and then stop.

The practical effect is on your day, not your trip. Walking the Grand Palace or Chatuchak between 11am and 3pm is genuinely draining; locals shift errands to early morning and evening. Air-conditioned malls, museums, the Skytrain and the river boats are the standard escape, and a hotel pool earns its price in April more than in any other month.

April splits into two different cities. Before roughly 12 April, Bangkok is a normal hot-season city: hotels are mid-priced, temples are busy but manageable, and restaurants are open. From 13 to 15 April, Songkran takes over. Thais travel home and to each other's cities, so buses, trains and domestic flights out of Bangkok fill up, and hotels in the city and at beach destinations raise rates.

After the festival, the second half of the month is quieter again and prices ease, though the heat keeps some travellers away. If your dates are flexible and Songkran is not the point of the trip, the last ten days of April are the better-value window.

Songkran, the Thai New Year, is the event of the month: 13–15 April nationwide, with water thrown on the streets of Bangkok from morning to evening. Silom, Khao San Road and the area around Siam are the busiest spots. It is a genuine festival, not a tourist show, and it comes with practical rules: many shops and offices close, alcohol sales are restricted on some days, and phones, passports and cameras need a waterproof bag.

Beyond Songkran, April is a quiet month for festivals. Royal and memorial days fall in other months, so check the calendar for any one-off temple fairs or concert dates before you travel.

Build the day around shade and water. Early morning is for the Grand Palace, Wat Pho and Wat Arun, before the heat peaks; the river boat between them is both transport and a breeze. Midday belongs to air-conditioned places — the Jim Thompson House, the Bangkok Art and Culture Centre, or a mall food hall. Late afternoon and evening are for markets: Chatuchak on the weekend, or a night market for dinner.

If Songkran is your reason for coming, base yourself near Silom or Khao San Road and accept that you will be wet. If it is not, plan those three days around indoor sights, or use them for a side trip — Kanchanaburi and Ayutthaya are both reachable as day trips, though Songkran traffic makes them slower than usual.

Pack for heat and water. Light, loose clothing in cotton or technical fabric, a hat, sunglasses and high-factor sunscreen are the basics. Temples require covered shoulders and knees, so carry a light layer or a sarong even in the heat. Comfortable sandals beat closed shoes when the streets are wet.

For Songkran, add a dry bag for phone, wallet and passport, and expect to be soaked if you go anywhere near the festival zones. A refillable water bottle matters more here than in most cities — you will drink far more than usual.

March is hot too, but the northern burning season makes Chiang Mai's air bad — Bangkok itself is usually fine. May brings the first real rains and lower prices, and the Andaman coast starts to turn rough. February is the last comfortable month of the cool season and the easiest pick if you can move your dates.