Thailand in August

In short

Thailand in August is wet on the Andaman side, but Koh Samui gets about a third of Phuket's rain.

Why August works

Yes, if you base the group on the Gulf. August is low season, so flights and villas are easier to book, and Koh Samui, Koh Phangan and Koh Tao are the most reliable beaches of the month.

The Gulf gives you calmer seas and the best beach days. The Andaman coast is in its deep monsoon, so there we plan pool days, not boat days.

There are no Buddhist ban days in August 2027, so the whole month is open.

Insider tip: Hua Hin is one of the driest beach towns this month and about three hours from Bangkok by car, if the group wants a weekend off the islands.

Ask Tanner which island suits your group.

How much it rains

Thailand in August weather is the peak of the wet season, but the Gulf islands get far less rain: Koh Samui averages about 102 mm over 10 rain days and Phuket about 309 mm over 17 (1991–2020 averages).

On the Andaman side the swell is big, red flags fly on Phuket's main beaches and ferries can be cancelled. Maya Bay on Phi Phi is closed from 1 August to 30 September. That's why Koh Samui is our pick for the beach this month. Ask Tanner for a Samui villa.

Koh Samui

High / low:: 32 / 25°C
Rain:: 102 mm
Rain days:: 10

Hua Hin

High / low:: 33 / 26°C
Rain:: 67 mm
Rain days:: 10

Pattaya

High / low:: 31 / 26°C
Rain:: 91 mm
Rain days:: 9

Bangkok

High / low:: 33 / 26°C
Rain:: 227 mm
Rain days:: 16

Chiang Mai

High / low:: 32 / 24°C
Rain:: 223 mm
Rain days:: 17

Phuket

High / low:: 32 / 26°C
Rain:: 309 mm
Rain days:: 17

Koh Chang

High / low:: 31 / 24°C
Rain:: 970 mm
Rain days:: 25

Region	High / low	Rain	Rain days
Koh Samui	32 / 25°C	102 mm	10
Hua Hin	33 / 26°C	67 mm	10
Pattaya	31 / 26°C	91 mm	9
Bangkok	33 / 26°C	227 mm	16
Chiang Mai	32 / 24°C	223 mm	17
Phuket	32 / 26°C	309 mm	17
Koh Chang	31 / 24°C	970 mm	25

A group of people laugh and hold drinks beside a villa pool at dusk, with candles, the sea, distant hills, and dark clouds in view. — Photo: AI-generated image

276 days to Thursday 12 August
Peak wet season; Koh Samui about 102 mm, Phuket about 309 mm
Koh Samui and Koh Phangan
Tuesday 17 August 2027
None in August 2027

What's on in August 2027

August 2027 has Mother's Day on Thursday 12 August and the Full Moon Party in the middle of the month. There are no Buddhist alcohol-ban days in August 2027.

Thursday 12 August is the birthday of the late Queen Sirikit, Mother's Day in Thailand and a public holiday, so banks and government offices close.

The Full Moon Party falls on Tuesday 17 August at Haad Rin on Koh Phangan, and the beach fills from about 10pm.

Insider tip: book the return boat before you cross. It's the thing everyone forgets at 3am.

See the Thailand party calendar and Thailand public holidays, and ask Tanner what's on the week you land.

Thursday 12 August

Event:: Mother's Day, public holiday
Where:: Nationwide

Tuesday 17 August

Event:: Full Moon Party
Where:: Haad Rin, Koh Phangan

Date	Event	Where
Thursday 12 August	Mother's Day, public holiday	Nationwide
Tuesday 17 August	Full Moon Party	Haad Rin, Koh Phangan

What to book first

Very little sells out in August. The Andaman coast is quiet, but the Gulf islands are busy with summer-holiday visitors, so book them a few weeks ahead.

Koh Samui villas go first. Villas near Haad Rin for the Full Moon on the 17th go next. Bangkok clubs, Pattaya villas and anything on the Andaman side are easy.

Ask Tanner to hold the Samui villa first.

Where to take the group

Base your group on Koh Samui for the beaches, take the boat to Haad Rin on Koh Phangan for the Full Moon, and go to Bangkok for the clubs. The boat days happen on the Gulf.

Bangkok has the rooftops and the big clubs, with licensed clubs in the late zones open until 4am (TAT News, checked October 2026).

Pattaya is about two hours from Bangkok, with pool villas from ฿12,500 a day. In Phuket, take a villa with a pool, from ฿18,500 a day, and skip the boats.

See Koh Samui to Koh Phangan and Bangkok to Koh Phangan, and ask Tanner for the boat across.

Friends at a Bangkok rooftop bar on an August night. — Photo: AI-generated image

An August trip, planned

Plan an August trip around the Gulf: a Koh Samui villa as the base, the beach and the boat early, the pool when a shower rolls in, and the clubs at night.

The villa gets a DJ by the pool from ฿8,000 a day and an open bar at ฿1,500 a guest. The boat is a motor yacht for up to 15: the price depends on the boat, and Tanner quotes it to your plan. For the Full Moon, your own boat to Haad Rin and back, quoted to your plan too.

Plan it with Tanner, and the Full Moon boat is booked.

Koh Samui in August, day by day

Mornings are for the beach and the boat, while the Gulf is calm.

Afternoons are for the villa pool, with a DJ on the terrace if a shower rolls through.

Evenings are Chaweng, then the clubs, and on the 17th, our boat to Haad Rin for the Full Moon.

Insider tip: keep the afternoon for the pool, so a passing shower never costs you the boat. Ask Tanner to time the boat day.

Travel tips for August

For August, pack a light rain jacket, quick-dry clothes, sandals for flooded streets and a dry bag for the boats. Take travel insurance that covers delays, because ferries get cancelled in rough weather.

Smart casual for the clubs: a collared shirt, dark jeans and closed shoes.

Leave the heavy layers at home. Even Chiang Mai averages 32°C by day this month. Ask Tanner for the club dress code before you fly.

Is Thailand better in August or September?

August, for most groups. In Phuket, September is wetter still, at about 350 mm, and Maya Bay stays closed until 30 September. On the Gulf, both months work.

Pick August for the Gulf islands and a mid-month Full Moon. Pick September only for the quietest weeks, and plan for rain. Tanner's pick for either month: Koh Samui over Phuket.

See Thailand in July for the month before, and ask Tanner which month fits your dates.

Thailand in August in short

What it is: the low season, with the Gulf islands as the best beach bet.

Weather: the peak of the wet season; Koh Samui about 102 mm of rain, Phuket about 309 mm.

Best beaches: Koh Samui and Koh Phangan.

Avoid: Andaman boat days; Maya Bay is closed until 30 September.

Holiday: Mother's Day, Thursday 12 August.

Full Moon: Tuesday 17 August 2027.

Ban days: none in August 2027.

Plan it with Tanner, and your August villa is held.

Checked October 2026.

Tanner's offer

Your August week on one plan: the Samui villa, the Full Moon boat and the cars.

Plan it with Tanner →

Tanner Altman, host at Party Thailand Written by Tanner Altman · Updated 7 November 2026

Questions

Questions groups ask about Thailand in August

Is August a good time to visit Thailand?

Yes, on the Gulf side. Koh Samui, Koh Phangan and Koh Tao are the most reliable beaches, and it's low season, so flights and villas are easier to book.

Which part of Thailand has the best weather in August?

The Gulf islands and Hua Hin. Koh Samui averages about 102 mm of rain in August and Hua Hin about 67 mm, against about 309 mm in Phuket.

Is August the wettest month in Thailand?

Not on the beaches. In Phuket, September is wetter, at about 350 mm against 309 mm in August, and the Gulf islands stay much drier in both months.

Is it worth going to Phuket in August?

For a villa and the pool, yes; for boats and swimming, no. Red flags fly on the main beaches and Maya Bay is closed until 30 September, so we keep the boat days on the Gulf.

Are there alcohol-ban days in August 2027?

No. August 2027 has no Buddhist holy days with an alcohol ban, so the bars and clubs run as normal all month.

When is the Full Moon Party in August 2027?

Tuesday 17 August 2027, at Haad Rin on Koh Phangan. Villas near the beach go early, so ask Tanner to hold one first.

Is it too hot in Thailand in August?

It's warm rather than scorching: highs of about 31 to 33°C across the country, with humidity and showers. The villa pool takes care of the afternoons.

Is Koh Samui good in August?

Yes. It's one of the most reliable beaches in Thailand in August, with about a third of Phuket's rain, and villas that are easy to get. Ask Tanner for one near Chaweng.

What is there to do in Thailand in August?

Beach and boat days on Koh Samui, the Full Moon on Koh Phangan, diving off Koh Tao, rooftops and clubs in Bangkok, and a pool villa in Pattaya or Hua Hin for a weekend close to the city.

Plan it

Plan it with Tanner

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Sources

Credits: top photo by Photo: Dirk Enthoven / Wikimedia Commons, CC BY 3.0, edited.