Thailand for first-time visitors: what to know before you go

Thailand rewards a short list. The trips that go wrong try to see Bangkok, the north and an island in ten days, and spend half of it in transit. Pick one region beyond Bangkok and give it the nights it needs.

Bangkok works as the air hub for every other leg. Three or four nights covers the Grand Palace, Wat Pho, a river boat and enough street food to know what you like. From there, a one-hour flight north to Chiang Mai or south to Krabi or Phuket beats a 10–12 hour overnight bus, which costs you a day of the trip in recovery.

Choose the coast by month, not by photo. The Andaman side (Phuket, Krabi, Koh Lanta, Koh Lipe) is dry Nov–Apr. The Gulf side (Koh Samui, Koh Phangan, Koh Tao) is better Feb–Sep. In the wet months boats get cancelled and some island services thin out.

In the north, Chiang Mai is the base: old-city temples, cooking classes, night markets, mountains within a day trip. Chiang Rai adds the White Temple and the Golden Triangle, two nights at most on a first trip. Note that Feb–Apr is burning season in the north, when air quality drops sharply; if you have breathing problems, move those months to the coast.

Money is simpler than people expect. Thai baht is the currency; cards work in hotels, malls and mid-range restaurants, but markets, songthaews, small guesthouses and island taxis are cash. Carry a few thousand baht in small notes and use ATMs sparingly — foreign cards pay a fixed fee per withdrawal, so take larger amounts less often.

Etiquette is light-touch. Cover shoulders and knees at temples, take your shoes off before entering one, don't touch anyone's head or point your feet at people or Buddha images. The monarchy is protected by law and insulting it carries real penalties; keep opinions to yourself. Never touch or feed elephants at camps that offer rides — choose sanctuaries that let you observe instead.

Safety is mostly about traffic and the sea. Thai roads are the biggest risk you will meet: rent a scooter only if you are licensed, insured and experienced, wear a helmet, and never ride after drinking. On the coast, swim between the flags, stay out of the water in monsoon swell, and treat red flags as absolute. Petty theft is rare; bag-snatching on motorbikes happens in tourist areas at night.

Health basics: drink bottled or filtered water, eat at busy stalls where food is cooked to order, and use mosquito repellent at dawn and dusk in the north and on the islands. Pharmacies are everywhere and cheap; hospitals in Bangkok, Chiang Mai and Phuket are good, and travel insurance that covers motorbike injuries is worth the extra cost.

Book domestic flights two to four weeks ahead for the best fares; Bangkok Airways and Thai Vietjet both serve the main routes, and seats on island routes sell out in high season.

Learn a few words: sawasdee (hello), khop khun (thank you), mai pen rai (no problem). It changes how you are treated in markets and small shops.

Buy a local SIM or eSIM at the airport on arrival — data is cheap and maps, ride-hailing and translation all need it.

Agree the price before a tuk-tuk or unmetered taxi ride, or use a ride-hailing app where it works. In Bangkok, insist on the meter in metered taxis.

Do not hand your passport over as a deposit for a scooter or jet ski; leave a cash deposit or use a reputable operator instead.

Pack light, breathable clothes and one set of temple-appropriate cover-up; laundry is cheap and everywhere.

Book accommodation for the first two nights only, then decide where to stay longer once you have seen the area.