August is wet, warm and good value in Bangkok. Rainfall builds to about 227 mm as the monsoon strengthens towards its September peak, the temperature eases to 31°C – the coolest daytime figure since January – and 12 August is Mother’s Day, marked nationwide on the birthday of the late Queen Mother Sirikit. It is the quietest of the summer months and the last before the wettest weeks of the year.
Mother’s Day, 12 August
Thursday 12 August 2027 is a national public holiday, celebrated as Mother’s Day on the birthday of Queen Sirikit the Queen Mother. Expect:
- Light displays and decorations around the Grand Palace, Ratchadamnoen Avenue and government buildings, often in blue, the colour associated with the day.
- Jasmine given to mothers, and busy restaurants – it is one of the bigger family dining days of the year.
- Government offices and banks closed; shops, transport and tourist sites operating normally.
Weather
August averages about 31°C by day and 26°C at night, with roughly 227 mm of rain. Daytime highs are the lowest they have been since January, because the cloud cover suppresses them – but the humidity is relentless and nights stay warm.
The pattern remains the wet-season one: bright humid mornings, a heavy hour or two in the late afternoon, clear evenings after. Street flooding after a serious fall is routine and usually drains within a couple of hours.
What August is for
- Value. Still low season, and one of the cheaper months of the year.
- Green Bangkok – Lumphini Park, Bang Krachao (the “green lung” across the river) and the canal neighbourhoods are at their best after months of rain.
- Indoor Bangkok – the malls, the Jim Thompson House, the National Museum, the cinemas and the massage shops.
- Evening street food, in the washed air after the rain.
- The Gulf islands, still in their drier season if you are pairing a beach.
Prices and crowds
Low. The mid-year European visitors are still around but numbers are modest, and hotel rates remain well below the cool season. It is one of the better months to stay somewhere in Bangkok you could not otherwise justify.
See the Bangkok travel budget.
What to pack
Quick-drying clothing, footwear you can rinse, a compact umbrella, a dry bag for electronics and strong insect repellent – mosquito numbers are near their peak and dengue is present in Thailand. Temple cover for shoulders and knees, and a layer for air conditioning. See what to pack for Thailand.
The August 2027 calendar
- Thursday 12 August – Mother’s Day and the Queen Mother’s birthday, a national public holiday; light displays around the Grand Palace.
- Through August – about 227 mm of rain as the monsoon builds; 31°C, the coolest daytime figure since January.
- Through August – Vassa continues; many Thais are still abstaining from alcohol.
- Through August – low-season rates; modest visitor numbers.
- Through August – street flooding after heavy falls; the BTS and MRT stay reliable.
- Through August – peak mosquito season; repellent matters.
- September – the wettest month of the year is next.
Read alongside
- Bangkok in July – Buddhist Lent and the alcohol ban.
- Bangkok in September – the wettest month of the year.
- Thailand in August – the country-level view.
- Best time to visit Bangkok – all twelve months compared.
- Bangkok travel budget – low-season numbers.
- Day trips from Bangkok – Bang Krachao is at its greenest.
- Things to do in Bangkok – the wet-afternoon list.
Frequently asked
What is 12 August in Thailand?
Mother’s Day, celebrated on the birthday of Queen Sirikit the Queen Mother, and a national public holiday. Expect light displays around the Grand Palace, jasmine given to mothers and busy restaurants. Banks and government offices close.
How much does it rain in Bangkok in August?
About 227 mm, building towards the September peak, almost all of it in heavy late-afternoon bursts. Street flooding after a serious fall is routine and usually drains in a couple of hours.
How hot is Bangkok in August?
About 31°C by day and 26°C at night – the lowest daytime figure since January, because cloud cover suppresses it. The humidity, however, is relentless.
Is August a good time to visit Bangkok?
For value, yes. It is still low season, visitor numbers are modest, the city is green after months of rain, and hotel rates are well below the cool season.
Is dengue a risk in August?
Mosquito numbers are near their peak in the wet season and dengue is present in Thailand. Use repellent, cover up in the evenings, and be aware the mosquito that carries it bites during the day as well.
Are bars still closed for Buddhist Lent?
Only on the specific holiday days in July. Through Vassa many Thais personally abstain until October, but normal alcohol sales resume after Asahna Bucha and Khao Phansa.
Where is green in Bangkok?
Lumphini Park in the centre, and Bang Krachao – the “green lung” across the river, reached by a short boat crossing – which is at its best after months of rain and is the easiest escape from the city.
Is Bangkok cheap in August?
Yes – one of the cheaper months of the year, and a good time to stay somewhere you could not justify in January.
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Written by
John Morrison is the founder and lead travel writer at Packzup. Over the past decade he has explored destinations across Africa, the Americas, Asia, Europe, the Middle East, and Oceania — always self-funded, never on a press trip.
