Thailand.

Thailand is one of the easiest countries in the world to travel, cheap, infrastructure-rich, English widely spoken in tourist zones, food culture that punches at world-class level for a few dollars a meal. But it's also a country where the wrong fortnight can give you whiteout monsoon rain on islands that are unreachable by ferry, smoke alerts in Chiang Mai, or a $400/night Phuket beach hut that costs $90 six weeks later. Timing matters more than itinerary.

Three macro patterns to internalize:

1) Two coasts, opposite seasons. Thailand sits across the Malay Peninsula. The Andaman (west) coast, Phuket, Khao Lak, Krabi, Ko Lanta, Phi Phi, Similan Islands, runs on the southwest monsoon: dry November to April, wet May to October. Phi Phi and Similan boat trips often pause entirely from late May through October. The Gulf (east) coast, Koh Samui, Phangan, Tao, Hua Hin, runs opposite. Driest February to April, wettest October and November, when monsoon backwash and tropical depressions can soak Samui for two weeks straight. For July–September visitors, head to the Gulf islands. For November–April, the Andaman is the move.

2) The north has a fourth season, burning season. From late February through April, farmers across northern Thailand, Myanmar, and Laos clear fields with fire. Combined with forest fires and a temperature inversion that traps smoke against the mountains, Chiang Mai's PM2.5 routinely sits between 100 and 200 µg/m³ in March, with several days a year above 250 (the WHO 24-hour guideline is 15). Mountains disappear into haze, eyes burn, asthmatic travelers should not be there. By late May the rains start and the air is washed clean within a week.

3) Festivals dictate prices and crowds more than weather does. Christmas–New Year on the islands, Songkran (April 13–15), and Loy Krathong (November full moon) are the three pricing super-spikes. If you book Chiang Mai for Loy Krathong in February, you'll pay double and many guesthouses will be already full.

The other thing to know: Thailand is forgiving in shoulder seasons. "Monsoon" rarely means all-day rain, it usually means a 1–2 hour afternoon dump, then sun. May, June, and September often deliver excellent value with weather that's 75% as good as November for 50% of the price.

Thailand splits roughly into three travel zones, each with its own seasonal logic.

The North (Chiang Mai, Pai, Chiang Rai, Mae Hong Son loop). Cool, mountainous, jungle-and-temple country. Best mid-November through late February, daytime 25–28°C, nights down to 12–15°C, dry, clear, mountains visible. Avoid March and April for the burning-season air-quality reasons above. June through September is green-season lush with fewer tourists, occasional afternoon rain, and excellent value (and clean air). Chiang Mai is the base for elephant sanctuaries (only ethical no-riding ones, Elephant Nature Park is the standard), Doi Suthep temple, Sunday Walking Street, and the Mae Hong Son loop. Three to four nights minimum.

The Andaman coast (Phuket, Krabi, Ao Nang, Railay, Ko Lanta, Phi Phi, Similan, Khao Sok). The classic limestone-cliffs-and-turquoise-water Thailand. Best mid-November through April, with December–February as peak. May–October is monsoon: ferries to Phi Phi run irregularly, day trips get cancelled, the Similan Islands are closed entirely (typically May 16 – October 14). Phuket itself stays open year-round and cheap-to-mid hotels run 40–60% cheaper in low season, fine for budget travelers tolerant of grey skies and afternoon rain. Krabi/Railay is the climbers' and chillers' base; Ko Lanta is more laid-back than Phi Phi; Khao Sok National Park (rainforest jungle, floating raft houses) is actually better in the rainy season, waterfalls run, mist hangs in the karsts.

The Gulf islands (Koh Samui, Koh Phangan, Koh Tao). Opposite cycle. Best late January through April, with February–April peak dry. Koh Samui is the developed one, flights direct, resorts, families. Koh Phangan is the Full Moon Party island (around each full moon at Haad Rin) but also has yoga retreats and a quieter north coast. Koh Tao is Asia's cheapest place to get scuba certified, Open Water around 9,000–11,000 baht ($250–$310) including 4 dives. The Gulf gets messy in October and November, these are the wettest months of the year here, opposite to the Andaman's peak.

Bangkok is its own thing: hot and humid year-round, mostly comfortable November–February, brutal April. Two to three nights to start or end most trips. Ayutthaya and Sukhothai for ancient ruins are best in the cool dry season.

Suggested two-week sketches. Nov–Feb: Bangkok 2 → Chiang Mai 4 → Krabi/Railay 4 → Phi Phi or Lanta 3 → Bangkok 1. Jul–Sep: Bangkok 2 → Chiang Mai 4 → Khao Sok 2 → Koh Samui or Phangan 5 → Bangkok 1. Mar–Apr: skip the north, do Bangkok + Andaman + Gulf instead, accept the heat.

Visa. Most Western passports (US, UK, EU, Canada, Australia, New Zealand) currently get visa-free entry for up to 60 days under the scheme expanded in July 2024 to cover 93 countries. Note: the Thai government announced in April 2026 that it intends to roll the list back to 57 countries with 30-day stays (date not finalized as of May 2026). Check the latest before you book. From mid-2026 Thailand is also rolling out an electronic Travel Authorization (ETA) for visa-exempt arrivals, free, online, fill it out before your flight. There's also a new 300-baht (~$9) tourist entry fee added to flight tickets or paid on arrival as of 2026.

Transport. Use Grab (Southeast Asia's Uber) in Bangkok, Chiang Mai, Phuket, Pattaya, you bypass the meter-vs-flat-rate haggling that wastes hours of every trip. Bangkok's BTS Skytrain and MRT are clean, cheap (15–60 baht per ride), beat the traffic; the Airport Rail Link is 45 baht to the city center. Sleeper trains north (Bangkok → Chiang Mai, ~13 hours, 2nd-class A/C berth ~880–1,200 baht) are a real Thailand experience, book the State Railway website 30+ days out. Domestic flights on AirAsia, Nok Air, Thai Lion are cheap (Bangkok–Chiang Mai $30–60, Bangkok–Phuket $35–80), usually faster and not much more than train+bus combos. Ferries to islands run on monsoon-dependent schedules; book one-way and stay flexible if seas pick up.

Scams to know. Three classics:

• "Temple is closed today", taxi or tuk-tuk driver outside the Grand Palace, Wat Pho, or Wat Arun says the temple is closed for a holiday and offers to take you to a "better" temple plus a tailor or gem shop. The temple is open. Walk on.
• Gem and tailor scams, a friendly local strikes up a conversation, recommends a gem store with "government discount", overpriced glass.
• Tuk-tuk flat-rate runs, they'll take you to commission stops disguised as "on the way." Use Grab in cities and negotiate a price before you get in any tuk-tuk; in Bangkok, taxis with the meter on are usually cheaper than tuk-tuks anyway.

Tipping is not expected. Round up at restaurants or leave 20–50 baht for good service. Hotel staff: 20–50 baht for porters or housekeeping. Spa or massage: 50–100 baht is generous. Don't tip Grab drivers.

Temple etiquette. Cover shoulders and knees (Wat Phra Kaew enforces strictly, a sarong rental booth is on-site). Take shoes off before entering temple buildings. Don't point feet at Buddha images (sit cross-legged or with feet tucked behind you). Women should not touch monks or hand them objects directly. Photography is fine outside; check signs inside.

Money. ATMs are everywhere; foreign cards typically charge 220 baht ($6) per withdrawal, pull max (20,000–30,000 baht depending on bank) to amortize the fee. Cash for street food, markets, tuk-tuks, small guesthouses; cards for hotels, malls, and tourist restaurants. Currency is Thai baht (THB); rough rule of thumb in 2026 is 34 baht ≈ $1.

Thailand is one of the great-value travel destinations on Earth. The headline numbers, $30/day backpacker, $60/day mid-range, $150+/day comfort, have held for years and are still roughly accurate in 2026, with mild inflation pushing the mid-range up by 10–15% versus 2023.

Daily budget guidelines for 2026 (excluding international flights):

• Backpacker / hostel + street food: $30–45/day. Dorm bed 250–500 baht, three street meals 200–350 baht total, Grab/songthaews, one beer.
• Mid-range / private guesthouse, mix of restaurants and street: $60–110/day. Private A/C room 800–1,500 baht, restaurants and cafés 600–1,000 baht, transport, one paid activity.
• Comfort / 4-star hotels, restaurants, paid tours: $150–250/day. Hotel 3,000–6,000 baht, dining 1,500–2,500 baht.
• Luxury / Phuket and Samui resorts in high season: $400+/day, sometimes much more, Aman, Six Senses, Banyan Tree easily $700–1,500/night.

For two adults, 14 days, mid-range, on a Bangkok–Chiang Mai–Krabi loop: budget $1,800–3,200 on the ground, plus international flights ($800–1,500 per person from the US). That includes 2 domestic flights (~$120 each), a half-day Phi Phi or Phang Nga boat tour ($40–60), one or two cooking classes ($30–40), elephant sanctuary day ($75–100), and standard meals.

Where prices spike. December 22 to January 5 on Phuket, Samui, and Phi Phi can run 2–2.5x off-season rates, a $90 mid-range bungalow becomes $200. Songkran in Chiang Mai triples prices and accommodation should be locked in 2–3 months ahead. Loy Krathong weekend in Chiang Mai (around the November full moon), book 4–6 weeks ahead minimum. Long-tail boat day rentals at Railay, scuba on Tao, and Phi Phi snorkel tours are reasonably standardized, shop, but don't expect huge discounts.

Where to save. Eat at street stalls and food courts in malls (clean, A/C, 60–120 baht meals). Pad thai or khao pad on the street is 50–80 baht; at a tourist restaurant the same dish is 180–250. 7-Eleven is your friend for water (7 baht), beer, breakfasts, and SIM top-ups. Shared songthaews (red trucks in Chiang Mai, vans on islands) are 30–60 baht per ride versus 200+ for a private taxi. Skip the shopping malls for tailors and "jewelry", buy clothes at Chatuchak weekend market in Bangkok if you want bargains.

Thailand's festivals can be the highlight of a trip or the reason it falls apart, depending on whether you're prepared.

Songkran, Thai New Year, April 13–15 (sometimes extended to April 11–17 depending on official observance). The famous nationwide water fight. The whole country pours into the streets armed with super-soakers, buckets, and ice-cold hose water; locals smear chalk on each other's faces; bars set up DJ stages. Best in Chiang Mai, three solid days of water around the moat, the most full-immersion experience. Bangkok's Khao San Road is a tourist version, fun for a day. Trade-offs: flights and hotels easily 2–3x normal, every domestic transport sold out a month ahead, road accident rates spike (don't drive a scooter), Buddhist temples remain solemn (don't bring water guns into the wat). Carry your phone in a sealed dry-bag and assume everything you walk past will be drenched. Combine Songkran with the burning-season caveat: by April 13, northern air is at its annual worst. If you're sensitive, do Songkran in Bangkok or on the islands instead.

Loy Krathong & Yi Peng, full moon in November (November 24, 2026). Loy Krathong is the floating-lantern festival celebrated nationwide: people release small banana-leaf rafts (krathongs) carrying candles and incense onto rivers and lakes. Yi Peng is the Lanna (northern Thai) variant in Chiang Mai, where thousands of paper sky lanterns are released into the night sky, unforgettable, the postcard image of "Thailand at night." Mass releases at Mae Jo (the famous photographed event) require ticketed access; smaller releases happen along the moat and the Ping River. Book Chiang Mai accommodation 2–3 months ahead. Sukhothai's Loy Krathong at the historical park is quieter and arguably more atmospheric.

Vegetarian Festival (Phuket), late September/early October. Nine days of strict vegetarianism, processions, and, famously, devotees performing extreme self-mortification (cheek-piercing) in trance states. Not for the squeamish; powerful cultural experience.

Smaller events worth knowing. Lopburi Monkey Buffet (last Sunday of November), tables of fruit laid out for the city's macaques. Surin Elephant Round-up (third weekend of November). Bangkok Chinese New Year in Yaowarat (Chinatown), late January or February. Phi Ta Khon ghost festival in Dan Sai (Loei province), typically June or July.

Buddhist holidays to be aware of: Makha Bucha (February or March full moon), Visakha Bucha (May full moon), Asanha Bucha and Khao Phansa (July, start of Buddhist Lent). On these days alcohol sales are banned nationwide, bars closed, restaurants don't serve, 7-Eleven won't sell beer. Doesn't ruin a trip but worth knowing if you'd planned a drink night.