An East Marvel guide. Updated November 2026.
Hot. Slow. Shallow.
You land in Bangkok and the first thing you notice is the heat. November to early March is the dry season: clear skies, little rain, short sleeves. Christmas brings no snow and is not a public holiday here. The trees and the lights go up anyway. This is peak season. Rooms and flights go early.
Thailand is easy with children. The hard part is stopping at noon. Back to the room. The child sleeps. You wait. Every plan after that bends around it.
Twelve days: Bangkok three, Chiang Mai three, the coast four, then a night by the airport. Seven days is two places, Bangkok and one coast. Fourteen gives you one more afternoon in each place. Fly between them. If the flight home leaves late, skip the airport hotel and go straight from the coast.
The city
Bangkok's temples sit together. The Emerald Buddha is inside the Grand Palace. Wat Pho is next door. Flat ground, one morning, if you start at opening. Shoulders and knees covered, shoes off at the door. For small feet that means hot tile and gravel, so thin socks, and a bag to carry them in. Back to the room at noon.
The flower market is a morning thing. Go at eight, not before dawn. Pak Khlong Talat is the biggest wholesale flower market in Thailand. The night trade has already sent the garlands into the city. By eight the pavement is still wet, and the vegetable stalls are in the same lanes. Vans reverse. A stroller does not fit. Hold the small hand.
For the canals, take a longtail. An hour or two. A wooden hull, a car engine on a long shaft, and channels no big boat can enter. It is loud, and the back of the boat gets wet. Ask for child lifejackets before you board. Keep the rain shells in the boat, not in the hotel. On the bank: a big Buddha, and other people's days.
When the child runs out of patience, go indoors. SEA LIFE Bangkok Ocean World fills the basement of Siam Paragon. The mall's own page puts it at more than 10,000 square metres, and SEA LIFE calls it the largest aquarium in Southeast Asia. It is cold and dim. Take a thin jacket. BTS to Siam, then the lift down into the mall. The aquarium posts that day's hours. Last entry is an hour before close, and some days close early. Buy the visitor ticket on the aquarium's own site. A Thai-resident price will not work at the door.
Or rent a bicycle in Benjakitti Park and ride the loop until the legs give out. The traffic stays outside the fence.
With one more day, go to Ayutthaya, about ninety minutes by road. The old capital: ruins on flat ground, worn paths, a large site. Take the buggy, not a bicycle.
The north
Chiang Mai costs less, so a family bill still fits.
From late February the valley holds smoke. If anyone's lungs are weak, take Chiang Mai earlier, or shorten it.
No elephant rides. At a proper sanctuary you feed them, walk near the herd, and watch them bathe when they feel like it. Some places have stopped the bath you climb into, as well as the ride. Others still sell the mud and the river. Read the operator's own site before you pay. The test is on the page: no riding, no shows, no forced bathing, no hooks, and a name and a history for each animal. Cool-season dates go about two weeks out. Wear shoes you can lose to mud. What the child remembers is the ear, not the briefing.
November brings the lanterns. They are not released in the city. The mass releases are at authorised sites outside it, over the full-moon weekend. The date follows the lunar calendar and comes out late. Do not copy last year's diary. Those nights are loud, and the fireworks run late, which matters if the child is up at six. If the lanterns are why you came, book those two nights, and the flights around them, early. If they are not, take the week before. It is easier to book.
On an ordinary day, ride along the Ping. Eat at Warorot if there is still energy.
The sea
Keep one bay.
November to early March, Phuket: Kata, Kamala, Bang Tao. Soft sand. The beach often starts at the hotel door. The first weeks of November can still be rough. Clear water arrives after that, not on the day you land.
Read the flags before you read the sea.
Red and yellow. Swim between them. That is the strip the lifeguards watch.
Red alone. Nobody goes in, however calm it looks.
Yellow. Caution. A weak swimmer stays out.
The smooth gap in the surf is often the rip, not a safe lane. Teach the child to float and raise an arm. If they are caught, you do not swim out after them. Reach, throw, and shout for the guard.
Jellyfish, including the rare box kind, do not keep a season you can memorise. Ask at the flag line that morning. If someone is stung, get them out. Do not rub the skin, and do not rinse it with fresh water. Pour vinegar only if the lifeguard says it is a box jellyfish. If breathing is hard, call 1669.
May to October the Andaman rains and the sea turns. Leave the west coast. Koh Samui sits in the gulf, on the other monsoon, so May to September is the drier stretch there. Chaweng is the busiest and the easiest. Lipa Noi or Choeng Mon if you want quiet. Samui's own wet months are October to December, worst in November. October is unsettled on both coasts. Wait for November if you can.
Four nights in one bay means the same shallow sand, a swim in the morning, and the room at noon.
Three things a child can do
An instructor is in the water for each of them.
Diving, at eight. A first breath underwater, in a pool, with a professional within arm's reach, in two metres or less. Shops that follow PADI call this a Bubblemaker. It is not a certificate, and it does not let the child dive afterwards. Another agency's intro may differ.
Diving, at ten. A supervised try-dive in the sea is one outing. A PADI Junior Open Water course is a real certificate, and it takes three or four days. On a four-night coast stop, that course is the whole holiday. Choose the course or the beach. On that card, ten- and eleven-year-olds stop at twelve metres, with a PADI professional or a certified parent or guardian. From twelve to fourteen the limit is eighteen metres, with a certified adult. At fifteen the adult Open Water card is the one that applies. Ask the shop whether the junior card upgrades without another course. There is a medical form either way. If a child is just over a run of ear infections, ask a doctor before you book. Book a shop on the bay you are staying in, and ask for child-sized wetsuits and regulators. Small sizes go first.
Under eight. A snorkel is the better hour in the water.
Cooking. Half a day. Pick a class that starts in the market, so the child learns the spices by smell. A three-hour morning beats a five-hour one. You eat what you made.
A longtail. Sit and watch the water.
Ordering
Lead with mai phet. It means not spicy. Say it again for every dish. The kitchen is not keeping a note.
Tom yum gai, khao pad, and mango sticky rice. These land safely.
Kai jeow. A plain omelette on rice. The most reliable plate on a Thai menu for a small child.
Som tam and green curry. Spicy unless you say mai phet again.
In English, "hot" means the weather. For the food, say mai phet.
Getting in, with children
Most Western passports get 30 days visa-free for tourism. On the embassy exemption list, as posted for September 2026, that includes the United States, the United Kingdom, Canada, Australia, New Zealand, Japan, and most of the European Union. The list can change. A Chinese ordinary passport gets 30 days a visit under the bilateral agreement, and no more than 90 days in any 180. Other passports have their own agreements. If yours is on no exemption list and no bilateral list, apply at thaievisa.go.th. Give it weeks, not days. Some posts take four to six weeks in high season. If you are unsure which list you are on, use your embassy's page.
Every traveller files a free digital arrival card at tdac.immigration.go.th within the three days before arrival, infants included. A parent can file it for the child. One card per entry. That site only. Anything that asks you to pay is not the government. The paper list is in Before You Fly. Passports need six months left, and the airline will want to see a ticket out.
An officer may ask for proof of funds, in cash or the equivalent. For a visa-exempt stay the notices do not agree: 10,000 baht a person or 20,000 a family in one, and 20,000 and 40,000 in another. Children under 12 are outside the check on the lower notice. The higher notice does not say so. Leave before the permitted day. An overstay is still stamped on a child. Do not count on the fine being waived. Twelve days sits inside thirty, with room to move a flight.
Things to remember
The nap is the clock. 11am to 3pm indoors, at all three bases, even in December. The temples are at opening. The market is at eight. The aquarium, if you use it, is after the nap.
Seats. In a private car, a child of six or younger rides in a child seat or a booster. That is the Land Traffic Act: a child whose age does not exceed six. Anyone 135 cm or shorter needs a belt that fits, or another form of protection. The adult belt crosses the neck below that height. The fine runs to 2,000 baht. If the car has no child seat, the police notice allows a fallback only when the child is in a rear seat, the belt is across the waist, and the car is driven slowly in the left lane. A pickup bed does not count. Taxis, buses, and public vans are outside the child-seat rule, so they will not have a seat, and asking at the rank will not produce one. Book the seat with a rental car in writing, and give age, weight, and height. For a small child, book a transfer that brings a real seat. For an older child, an inflatable booster counts as an extra bag on the plane and lives in the day bag.
Two wheels. No child on a scooter. Not on the tank, not standing in the footwell, not in the thin helmet the rental hands over. Helmets are the law for the rider and the passenger. From 1 April 2026 the police stopped warning people first. The fine for no helmet runs to 2,000 baht.
Mosquitoes. Dengue runs all year and rises in the rains. The mosquito that carries it bites in daylight, at dawn and dusk especially. No repellent on a baby under two months: sleeves and a net. On an older child, the American Academy of Pediatrics says no more than 30 percent DEET, and no oil of lemon eucalyptus under three. Put it on your own hands first, then on the child's skin, and not on the child's hands. Sunscreen first, repellent after, and more sunscreen than feels necessary. The sun stays strong under cloud. Long sleeves at dusk. Netting over the stroller if the room is not air-conditioned. No tap water. Bottled water is cheap.
Medicine and doctors. Every child's medicine stays in its box, label readable, with a doctor's note that names the drug by its generic name. Paracetamol and ordinary syrups are on every corner. A prescription is the thing you cannot replace, so bring the course you are on and the letter that explains it. Private hospitals ask for a deposit before they treat, insurance or not. Save the numbers from the hospitals' own sites: Bumrungrad and Samitivej in Bangkok, both with children's departments, Chiang Mai Ram, Bangkok Hospital Phuket, and Phuket International Hospital. Ambulance 1669. Tourist police 1155. English is spoken.
Temples. Shoulders and knees covered, shoes off, quiet inside, and no climbing on anything with a Buddha on it. Small children are tolerated. A monk is not a photo. Buy nothing you then release. No fish, no birds, no lotus to set afloat in a pond.
Money. Give the child 100 baht for a day and let them spend it badly at a night market. Watermelon, a toy sword, 20 baht of bubbles. You get an hour of them being interested.
Day by day
This list is the Phuket trip, November to early March. In May to September, fly to Samui instead, and there is no Phi Phi day.
Day 1. Arrive. One street. Early night.
Day 2. Grand Palace and Wat Pho at opening. Room at noon. River at dusk.
Day 3. Flower market at eight. Longtail after. Room at noon.
Day 4. Fly north, an hour to an hour and a quarter. The Old City in the afternoon.
Day 5. Sanctuary for half a day. Shade through the hot hours.
Day 6. Cooking in the morning, market first. Warorot if there is energy. Lanterns only if the dates land here. The night ends late and loud.
Day 7. Fly south, a short flight. On the sand by afternoon.
Day 8. Nothing.
Day 9. Flags first. Then the water between them. Shade after.
Day 10. Nothing. Phi Phi only if the sea is flat, on the large ferry.
Day 11. Fly back to Bangkok. Hotel by the airport.
Day 12. Depart, with room for the connection.
Days 8 and 10 stay empty on purpose.
What to pack
Thin socks for temple floors. A light jacket. Malls, the aquarium, and air-conditioned rooms are cold. DEET at 30 percent or less. Sunscreen, a hat with a brim, and rash vests. Water shoes, for coral, gravel, and boat steps. One inflatable booster. A dry bag for the longtail. Rehydration salts, a thermometer, and the doctor's note. Copies of every passport, and the TDAC screenshots, in both bags.
Two cities, one bay, and two days with nothing in them. Enough for a child to remember for a year.
See the Grand Palace and Wat Phra Kaew, Wat Pho, Pak Khlong Talat, the Bangkok canals, SEA LIFE Bangkok Ocean World, Benjakitti Park, Ayutthaya, a Chiang Mai elephant sanctuary, the Ping, Warorot Market, and one bay: Kata, Kamala, or Bang Tao on Phuket, or Chaweng, Lipa Noi, or Choeng Mon on Samui.
Taste tom yum gai, khao pad, mango sticky rice, kai jeow, and som tam only if you have said mai phet.
Check again before you book: the lantern weekend, the air in the north from late February, the flags on the beach you chose, the sanctuary's own written policy, the aquarium's hours and the visitor price, and the entry rules on your embassy's page.
What we recommend
November to early March, the published route is Bangkok, Chiang Mai, and Phuket, 10 days. It does not keep two days empty, and it does not add the night by the airport. May to September, the coast is Samui, and there is no Phi Phi day. Any animal day still has to pass the test on this page: no riding, no shows, no forced bathing. A shorter trip with two places is Bangkok and Phuket, 9 days, and it has no Chiang Mai.
Bangkok, Chiang Mai & Phuket, 10 days