Best Time to Visit Thailand: Bangkok, Phuket, Samui and the North by Month

The short answer: Thailand's year has three seasons: cool and largely dry from around November to February, hot from March to May, and rainy from June to October, though the government's own framework shifts the boundaries to mid-month rather than whole months. The regional split matters more than the national average: the Andaman coast (Phuket, Krabi) is wet roughly May to October, while Koh Samui on the Gulf coast runs almost the opposite calendar, driest for much of that window and wettest instead around October to December. Flights from Dubai take about six to six and a half hours non-stop to Bangkok or Phuket; our Thailand 5N/6D package starts from AED 2,500 per person. Travelling in the UAE's winter break puts you in Bangkok and Phuket's coolest, driest and busiest month.

Thailand at a glance

Fact	Thailand (checked October 2026)
Cool, dry season (mainland)	Roughly November to February; Thailand's busiest, priciest months
Hot season	Roughly March to May; Songkran 13–15 April
Rainy season (mainland)	Roughly June to October; afternoon downpours, fewer crowds
Andaman coast monsoon (Phuket, Krabi)	Roughly May to October; rougher seas, heavier rain
Gulf coast wet season (Koh Samui)	Roughly October to December; the reverse of the Andaman coast
Chiang Mai "burning season"	Roughly February to April, commonly worst in March; smoke and haze
Flight from Dubai	About 6–6.5 hours non-stop to Bangkok or Phuket (Emirates, flydubai)
Thailand packages from Dubai	5N/6D from AED 2,500; Thailand–Singapore combo from AED 8,200

Thailand's three seasons, in detail

Thailand's own government portal divides the year by mid-month: a hot season from mid-February to mid-May, a rainy season from mid-May to mid-October, and a cool season from mid-October to mid-February. Most travel guides round this to whole months instead — cool November to February, hot March to May, rainy June to October — which is close enough for planning, if a few weeks off at either end.

Bangkok's own climate normals (1991–2020) show the shape clearly. December is coolest and driest, averaging a high of 32.3°C, a low of 23.2°C and just 11.6mm of rain. April is hottest, averaging 35.7°C by day as the first pre-monsoon storms arrive, with 93mm of rain. September is wettest, at 335.9mm, roughly thirty times December's total. Temperatures move far less than rainfall does: Bangkok's average high barely drops below 32°C in any month of the year.

Thailand's weather by month

Month	Bangkok high/low	Rain	Notes
January	32.7°C / 23.4°C	24mm	Coolest nights of the year; dry nationwide
February	33.7°C / 24.8°C	21mm	Driest month; Chinese New Year (6 Feb 2027); Chiang Mai's burning season begins
March	34.7°C / 26.4°C	51mm	Heat builds; burning season worsens in the north
April	35.7°C / 27.2°C	93mm	Hottest month; Songkran 13–15 April; burning season commonly peaks
May	35.1°C / 26.9°C	217mm	Rain sets in; Andaman coast's monsoon begins
June	34.1°C / 26.4°C	199mm	Rainy season under way on the mainland; Koh Samui still comparatively dry
July	33.5°C / 26.1°C	190mm	Rain continues; a reasonable month for Koh Samui, wetter on the Andaman coast
August	33.3°C / 25.9°C	227mm	Heavy rain building on the Andaman coast; UAE summer holidays
September	33.2°C / 25.4°C	336mm	Wettest month in Bangkok and on the Andaman coast
October	33.3°C / 25.2°C	289mm	Still wet nationwide; Koh Samui's own wet season beginning
November	33.1°C / 24.7°C	45mm	Cool season begins on the mainland; Koh Samui at its wettest; Loy Krathong and Yi Peng
December	32.3°C / 23.2°C	12mm	Coolest, driest month in Bangkok and Phuket; Koh Samui still wet; UAE National Day and winter break

Bangkok, Phuket, Koh Samui and Chiang Mai: how the regions differ

Phuket and the Andaman coast

The southwest monsoon brings Phuket and Krabi's rain roughly May to October, with August to October commonly the heaviest, widely reported above 300mm a month, and seas rough enough that some beaches fly red flags. December to March is driest, often under 50mm a month and sometimes under 25mm in February, with steady temperatures around 27–34°C year-round. April and November are transition months either side.

Koh Samui and the Gulf coast

Koh Samui sits on the Gulf of Thailand, not the Andaman Sea, so its calendar runs in reverse: it stays comparatively dry for much of the mainland's rainy season, then turns wet from around October into December, with November commonly reported as its wettest month. Rain usually falls as short, heavy downpours rather than all-day drizzle, and some water-sports operators pause for safety in the roughest weeks. Exact monthly totals vary widely between sources, but Samui's position as a useful alternative to Phuket in UAE summer, when the Andaman coast is at its wettest, is well agreed.

Chiang Mai and the north

Chiang Mai is cooler than the south from November to February, especially at night, and stays largely dry from November to April. From roughly February to April, agricultural and forest burning across the north adds smoke to the valley, commonly worst in March; air-quality readings have reached well into unhealthy ranges in recent years. Travellers sensitive to air quality do better choosing November to January in the north.

Thailand in December

December sits in Bangkok and Phuket's cool, dry peak, averaging just 12mm of rain and a comfortable 23–32°C, while Koh Samui is still finishing its wettest spell. It overlaps with the UAE's National Day holiday and the winter school break, making it Thailand's busiest and most expensive month on the mainland; book flights and hotels well ahead, especially around Christmas and New Year in Phuket and Bangkok.

Festivals: Songkran, Loy Krathong and Yi Peng

Songkran, Thailand's water festival and New Year, is fixed at 13–15 April every year, so 2027 runs Tuesday 13 to Thursday 15 April, in the hottest stretch of the year. Chiang Mai's celebrations commonly start a day early, around 12 April, and Pattaya's continue to about 19 April.

Loy Krathong, and Chiang Mai's companion lantern festival Yi Peng, follow the full moon of the twelfth lunar month, usually in November. Organisers have set the main 2026 nights for around 24–25 November, with some events running to the 26th; most calendars put 2027 in the window of 13–14 November, though sources differ by a day on which night is the main one. Both dates are confirmed only a few months ahead, so check closer to travel before booking the ticketed Mae Jo lantern release.

Prices and crowds by season

The cool season, November to February, is Thailand's busiest and most expensive stretch nationwide, especially December's Christmas-to-New Year fortnight and the week around Chinese New Year (6 February 2027). The hot season, March to May, is quieter apart from Songkran week. The rainy season, June to October, is generally the cheapest and least crowded time for Bangkok, Phuket and Krabi, while Koh Samui runs on its own clock and sees relatively more demand during those same mainland-rainy months.

Which UAE holiday suits Thailand's seasons

• Eid Al Fitr, expected 9–10 March 2027. Thailand's hot season is building (Bangkok averages 51mm and 34.7°C in March) — fine for sightseeing in Bangkok and Chiang Mai, hot for the beach by midday.
• Eid Al Adha, expected 15–18 May 2027. The rainy season is just beginning nationwide (Bangkok averages 217mm in May) — expect afternoon storms with plenty of sun either side.
• UAE summer holidays, June to August. The heart of the rainy season on the mainland and the Andaman coast; Koh Samui is the better bet, since its own wet season does not start until around October.
• National Day and the winter break, December. Thailand's cool, dry peak on the mainland — the most comfortable weather of the year, and also the busiest; book early.

Many UAE residents' passports, including Emirati, Indian and Filipino, currently need no visa for a Thailand holiday of up to 30 days; Pakistani, Sri Lankan, Bangladeshi, Nepali and Egyptian passport holders apply for a Thai e-visa before they travel. See our Thailand visa guide and Thailand visa service for which group applies to you.

Plan your Thailand trip with Holidayys

Our Thailand 5N/6D package covers Bangkok, Pattaya and Phuket from AED 2,500 per person, and the Thailand–Singapore combo, 8 days and 7 nights, starts from AED 8,200 per person; both are listed on Asian holiday packages, with flights quoted on top.

Tell us your dates and which coast suits you — Phuket, Koh Samui or a Bangkok and Chiang Mai combination — and we will check current flights, hotels and pricing. Message us on WhatsApp at +971 4 589 0001 or use the contact page.

Frequently asked questions

What is the best time to visit Thailand overall?

Roughly November to February, Thailand's cool, dry season nationwide, though it is also the busiest and most expensive. March to May is hotter with fewer crowds outside Songkran week, and June to October is cheapest but wetter on most of the mainland.

What is the best time to visit Phuket?

Roughly December to March, when the Andaman coast is driest and seas are calmest. The monsoon runs May to October, with August to October commonly the wettest and roughest.

What is the best time to visit Bangkok?

November to February, when Bangkok averages under 50mm of rain a month and temperatures are comparatively mild. April is hottest, at an average high of 35.7°C, and September is wettest, averaging 336mm.

Is Thailand good to visit in December?

Yes on the mainland: Bangkok and Phuket are in their driest, coolest stretch. It is also the busiest and most expensive month, overlapping the UAE's National Day and winter break, so book well ahead. Koh Samui is still finishing its own wet season in December.

What is Chiang Mai's burning season?

A period of agricultural and forest burning across northern Thailand and neighbouring countries that worsens air quality, roughly February to April and commonly worst in March. Travellers sensitive to smoke and haze do better visiting the north from November to January.

Do UAE residents need a visa for Thailand?

It depends on your passport rather than your UAE residence. Citizens of around 60 countries, including the UAE, India and the Philippines, can stay up to 30 days visa-free; other nationalities apply for a Thai e-visa in advance. See our Thailand visa guide for the current list.

Related guides

• Thailand visa for UAE residents
• Flight times from Dubai
• UAE public holidays 2027
• Best time to visit Bali

Last checked 9 October 2026 against Thailand's official seasons guidance (thailand.go.th), Bangkok's 1991–2020 climate normals, Tourism Authority of Thailand and calendar-site reporting on Songkran, Loy Krathong and Yi Peng dates, IQAir air-quality data for Chiang Mai, and current Phuket and Koh Samui season reporting. Festival dates that follow the lunar calendar can move by a day, and monsoon timing and rainfall vary from year to year, so check closer to your travel dates.