Andaman Coast
Limestone rising straight out of the sea, and the boats that get you to it.
Temples, islands and street food, sorted
Thailand Travel Guide: Which Coast, Which Month?
Thailand has two coasts and they keep different seasons. Which one you want depends on the month you can travel, and getting that pair right matters more than any other decision on a first trip. Start with the year, then pick a place.
Measured, not repeated
Both coasts are dry in three months of the year
January, February and March. After that they part. In June, July and August the Andaman takes about three times the rain the Gulf does, which is exactly when most northern summers fall, and the Gulf saves its own wet season for October to December.
Andaman Coast at Phuket January: 52 millimetres February: 32 millimetres March: 93 millimetres April: 152 millimetres May: 269 millimetres June: 240 millimetres July: 223 millimetres August: 248 millimetres September: 293 millimetres October: 315 millimetres November: 231 millimetres December: 103 millimetres
Gulf Islands at Koh Samui January: 83 millimetres February: 41 millimetres March: 84 millimetres April: 99 millimetres May: 113 millimetres June: 85 millimetres July: 90 millimetres August: 90 millimetres September: 139 millimetres October: 270 millimetres November: 313 millimetres December: 163 millimetres
ERA5 reanalysis, 1995 to 2024, averaged per calendar month at Phuket and Koh Samui. How the seasons work
One exception this chart cannot show. It measures the coasts. Inland, rain changes a trip less, but agricultural burning across the north pushes air quality down from February to April, worst in March, and the haze can remove the mountains entirely for weeks. Rooms in Chiang Mai are cheapest then, and that is why. More on the north
Where these places sit
One country, two very different shores
Once you have the coast
Start with the trip you want
The month and the coast are the first decision and not the only one. These are the pages that take it from there, each written for one kind of trip rather than one place.
- A first trip, two weeks Two itineraries that go opposite ways, and the one decision between them.
- Travelling with children Which coast and which month, when the dates are set by a school term.
- A honeymoon The wedding date chooses the coast, which is not the order most couples plan in.
- Beaches above all else Ranked by what they are for, on our own wave and rainfall measurements.
- More than one place How the pairs actually connect, and which combinations cost you a day.
- Where to base yourself Pick the area before the hotel. On an island with no transport between the beaches, the base decides the week.
All five Thailand guides, each written for a situation rather than a place.
And the rest of the country
Inland, the month matters less
Bangkok and the north have a rainy season of their own, May to October, but it rarely decides anything: the temples, the markets and the trains work in it. Plan these around the coast you have chosen, rather than the other way round.
- Bangkok Thailand's capital mixes gilded temples and royal palaces with chaotic markets, riverside food stalls and a skyline of rooftop bars.
- Chiang Mai Chiang Mai is the calm counterweight to Bangkok.
- Chiang Rai Chiang Rai is the far north: a smaller, slower town than Chiang Mai three hours south of it, with the country's most photographed modern temple on its edge and the Mekong and the Golden Triangle an hour beyond.
- Pai Pai is a small town in a mountain valley three hours northwest of Chiang Mai, at the end of a road with 762 bends in it.
- Ayutthaya Ayutthaya was the capital of Siam for four hundred years and one of the largest cities on earth before a Burmese army destroyed it in 1767.
- Sukhothai Sukhothai was the first Thai capital and the place the Thai alphabet and the classic walking Buddha come from.
- Koh Samet Koh Samet is the island Bangkok goes to for the weekend: three hours by road and forty minutes by boat, inside a national park, with white sand on its eastern side and very little on the rest of it.
- Thailand Islands Thailand's islands split between two seas, and the difference shapes any beach trip.
Worth booking before you go
Free cancellation
The Newest Luxury 5-Star Bangkok Chao Phraya Dinner Cruise
★ 4.7 (847) from $48.17
Free cancellation
Bangkok Canal Tour: 2-Hour Longtail Boat Ride
★ 4.7 (6,683) from $35.74
Free cancellation
Half-Day Thai Cooking Class at Organic Farm in Chiang Mai
★ 5.0 (20,699) from $27.97
Free cancellation
Phang Nga Bay Sea Cave Canoeing & James Bond Island by Big Boat
★ 4.9 (5,175) from $80.96
Free cancellation
Deep Mangrove and Canyon Kayak Tour in Krabi
★ 4.8 (572) from $40.36
Free cancellation
Half Day Highlights Koh Samui Tour
★ 4.9 (1,555) from $30.77
Before you go
How many days do I need in Thailand?+
Ten days lets you pair a city such as Bangkok or Chiang Mai with a stretch on the islands. Two weeks adds room to slow down and see more than one region without rushing. Two weeks in Thailand
When is the best time to visit Thailand?+
The cool, dry season from November to February suits most of the country, but the two coasts do not share a calendar: the Andaman and the Gulf peak at different times of year, which decides the route more than anything else. All twelve months, measured
Do I need a visa for Thailand?+
It depends on your nationality and how long you plan to stay. Every visitor now files the Thailand Digital Arrival Card before entry, which is free and is not a visa. Visas and the arrival card
Is Thailand expensive?+
It can be either. Street food, local transport and simple rooms make a modest daily budget go a long way, while island resorts and private transfers move the figure quickly. What a trip actually costs
How do I get around Thailand?+
Domestic flights cover the long hops, overnight trains and buses the middle distances, and ferries the islands. Which combination works depends on which coast you are heading for. Getting around Thailand