Thailand's calendar mixes Buddhist, Brahmanic, Chinese and modern royal celebrations. Some festivals become the whole point of a trip; others are best avoided if you dislike crowds. Here are the ten you should know for planning 2026.
Songkran — Thai New Year (13-15 April)
Originally a gentle water-blessing ritual, Songkran has evolved into the world's largest water fight. The three official days (extended to five in some cities) turn most of Thailand into a soaked party zone.
Biggest celebrations: Chiang Mai (moat becomes ammunition depot, best atmosphere), Bangkok (Silom Road and Khao San Road), Phuket (Patong Beach), Ayutthaya (traditional processions still visible).
Practical advice: waterproof your phone, wallet and passport. Wear quick-drying clothes. Avoid two-wheelers during those days (accidents spike). Public holidays mean many restaurants and shops close for 3-5 days. Domestic flights and trains sell out weeks ahead — book by February.
Loi Krathong and Yi Peng (November)
Loi Krathong falls on the full moon of the twelfth lunar month (typically mid-November — in 2026 falling around 25 November). Thais float small decorated rafts (krathong) made from banana trunk and leaves onto rivers and ponds, releasing bad luck and honouring the water spirits.
Sukhothai celebrates most spectacularly — the historical park's ponds fill with thousands of krathongs, and light-and-sound shows illuminate the ruins nightly across a full week. Chiang Mai combines Loi Krathong with the northern Yi Peng festival, releasing thousands of paper lanterns (khom loy) into the night sky.
Environmental note: use only biodegradable krathongs (banana, bread, coconut) — Styrofoam is banned in most cities. Sky lanterns are restricted to specific approved zones (aviation and fire risk).
Vegetarian Festival (October, dates by Chinese lunar calendar)
Nine days of strict vegan eating and processions, most spectacular in Phuket Old Town. Devotees pierce their cheeks with metal skewers and swords in trance-state processions — not for the squeamish. Yellow flags with red Chinese characters mark participating restaurants where you can eat exceptional vegan food. In 2026 the festival falls around 11-19 October.
Chinese New Year (typically late January-February)
Bangkok's Yaowarat (Chinatown) is closed to traffic, decorated with red lanterns and hosts dragon dances, food stalls and fireworks. In 2026 Chinese New Year falls on 17 February. Phuket, Nakhon Sawan and Udon Thani also have significant Chinese communities and celebrations.
Makha Bucha, Visakha Bucha and Asalha Bucha
Three major Buddhist holy days, each falling on a full moon. Temples fill with worshippers carrying flowers, incense and candles in evening processions (wian tian) — three clockwise circuits around the main chedi. Foreigners are welcome to observe respectfully. Alcohol sales are banned on these days nationwide.
Royal Ploughing Ceremony (May, Bangkok)
Ancient Brahmin ritual at Sanam Luang next to the Grand Palace, marking the start of the rice growing season. Sacred oxen predict the year's harvest by their choice of grain, water and grass. Free to attend; arrive by 08:00 for standing room.
Rocket Festival (Bun Bang Fai — May, Isaan region)
Homemade rockets up to 9 metres long are launched to encourage the rainy season monsoon. Yasothon is the biggest, but villages across northeast Thailand hold their own competitions. Loud, boozy and utterly local — worth the detour if you're travelling in Isaan.
Phi Ta Khon (June-July, Loei province)
Ghost festival in Dan Sai — locals wear elaborate masks made from rice husks and coconut fronds and parade through the town. Colourful, photogenic and completely unlike anywhere else in Thailand.
Monkey Buffet Festival (last Sunday of November, Lopburi)
The town's famous macaques are treated to a spectacular buffet of over 4,000 kg of fruit, vegetables and cakes. Watch from a safe distance — the monkeys are aggressive and thieving on normal days, and downright frenzied during the buffet.
King's Birthday and Father's Day (5 December) and Mother's Day (12 August)
National holidays honouring the late King Rama IX (his birthday) and Her Majesty Queen Mother Sirikit. Public buildings and homes display flags and yellow bunting. Behave respectfully — never make political comments about the monarchy, which remains legally protected by strict lèse-majesté laws.
General etiquette: temple festivals require modest dress (shoulders and knees covered, shoes removed indoors). Never point feet at Buddha images or monks. Photography of ceremonies is usually welcomed if you are discreet and don't use flash during rituals.