Weather in Bangkok in March

How March compares

March is the 2nd warmest month of the year in Bangkok and ranks 3rd of 134 destinations we compare for March - see where else is hot in March. Within Thailand it is 2nd of 6 (Thailand in March). Against London's average high of 10.5°C in March, Bangkok is 23.1°C warmer by day and 22.2°C warmer at night.

Daytime and night-time in March

The typical March day in Bangkok peaks at 33.6°C, but that is an average: the warmest 10% of days reach 35.6°C or more. About 99% of days top 25°C and almost every pass 30°C. Nights average 25.5°C; one night in ten drops to 23.6°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest March day here reached 37.7°C (1993-03-28) and the coldest night 17.1°C (2011-03-17).

Rain in March

Some rain (4-8 rainy days): about 6 days with 1 mm or more, 40 mm in total. Year to year it varies a lot - the wettest March was 2001 with 171 mm, the driest 1992 with 1 mm. Humidity averages 70%.

Sea temperature in March

The sea averages 29.0°C - warm enough to swim (22°c+). Depending on the year it ranges from 28.5°C to 29.5°C. For the warmest sea here, come in May (30.6°C).

Sunshine and daylight

Around 6.9 hours of sunshine a day (estimated from cloud cover), 11.9 hours of daylight: the sun rises about 06:25 and sets about 18:28 local time in mid-March. Average cloud cover is 42%.

Is March a good time to visit Bangkok?

It is a reasonable choice: hot days - though the heat can be intense at midday. The best months for Bangkok on our scoring are December, January, November; months averaging 25°C or more: Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec.

Expect heat that shapes your day

Bangkok in March suits travellers who are happy to organise their day around the heat. With 96% of days reaching 30°C and humidity at 70%, even ordinary walking can feel demanding. The warmest days reach 35.6°C or more, so the average is not a ceiling. Put longer outdoor stretches earlier in the day, leave room for air-conditioned breaks around midday and carry water. Loose, breathable clothing is more useful than heavy layers. Evenings offer a break from direct sunshine, but not from the warmth: the average night low is 25.5°C. If you find hot nights tiring, prioritise a room with air conditioning rather than expecting open windows to keep you comfortable.

Some rain, but heat is the bigger constraint

About 6 rainy days means March is not reliably dry, but rain is less likely than heat to dictate your whole trip. Keep an indoor option available rather than planning every day entirely outdoors, and pack a light waterproof layer or compact umbrella. There is about 6.9 hours of sunshine within 11.9 hours of daylight, so do not assume sunshine will be continuous. Sun protection still belongs in your daily bag, and a cloudy spell should not be treated as a promise of cooler conditions. March makes sense if you want hot weather and can accept some rain; it is less suitable if your priority is comfortable, uninterrupted walking.