🗺️ Rainy season in Thailand: where it is dry in May 2026

In May, Thailand gets cheaper and the beaches empty out. The wet season begins, and some travelers move their vacation to winter. That's a mistake. The rain comes in short downpours, mostly at night, and the sun returns within an hour.

The main question in May is which coast to choose. On the Andaman Sea (Phuket, Krabi), the wet season is just getting started. In the Gulf of Thailand (Koh Samui, Koh Phangan, Koh Tao), May stays dry and sunny. The difference is in the monsoons, not the latitude.

Ahead you'll find a breakdown of seven resorts, weather by region, prices for tours, hotels, and food, plus the honest catches of May. For a sense of scale: the Grand Palace in Bangkok receives more than 8 million visitors a year (as of 09/2026, Wikipedia).

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What to expect in May

💡 In short:

May opens the wet season, but the rain is short and mostly at night.
Sea water stays around 29-30 °C, so swimming is comfortable even in a downpour.
On Koh Samui, Koh Phangan, and Koh Tao, rain is rare, while on Phuket and in Krabi the waves on western beaches are picking up.

The kingdom greets May with heat and high humidity. During the day, the air warms up to 30-35 °C (as of 09/2026, Tourism Authority of Thailand), and at night it rarely drops below 26 °C. Sea water stays around 29-30 °C, so swimming is comfortable even in a downpour.

Herd of elephants on a green meadow on an overcast day

Regions behave differently. On Phuket and in Krabi, the monsoon arrives from the Andaman Sea: downpours become more frequent, and the waves on western beaches grow. On Koh Samui, Koh Phangan, and Koh Tao, rain is rare, but the humidity is noticeably higher.

Next come the rules worth knowing in advance. Buddhism is the main religion here, and you enter a temple with your shoulders and knees covered. Leave shorts, tank tops, and flip-flops at the hotel. You can photograph Buddha statues, but don't turn your back to them or hug them in photos.

Thais consider loud emotions a sign of poor manners. Don't argue in a raised voice, don't point your finger, and don't touch people without reason. These are simple rules, but they're exactly what causes conflicts.

Safety also requires attention. Buy street food where it's cooked in front of you and locals are lining up. Don't go into the jungle alone: without a guide, it's easy to get lost and encounter venomous wildlife. If you're unsure about a nightlife venue, it's better to walk past. Drug offenses in Thailand carry harsh penalties, up to and including deportation.

May weather by region

The Andaman coast changes character in May. The first half of the month is still dry; by the end of May, rain falls almost daily, but for an hour or two at a time. Waves on Phuket and in Krabi rise, and some beaches are closed for swimming with red flags.

The Gulf of Thailand stays more consistent. Koh Samui, Koh Phangan, and Koh Tao get sun in the morning and a short rain in the evening. For family vacations and diving, this is the place: the water is calm and the wind is light.

The north of the country lives differently. In Chiang Mai, May remains the last hot month before the monsoon: up to 35 °C during the day (as of 09/2026, official weather overview), with rare and short rain.

What this means in practice: plan the beach before noon and excursions for the second half of the day. Bring a rain jacket, not an umbrella. The wind destroys umbrellas in a minute, while a rain jacket lasts the whole vacation.

Which resort to choose

Thailand offers two types of vacations: islands and mainland cities. The choice depends on what you want more: quiet, diving, nightlife, or temples. Below are seven resorts with honest pros and cons.

Resort	Coast	Weather in May	Who it's for
Phuket	Andaman Sea	waves and downpours by the end of the month	diving, nightlife
Samui	Gulf of Thailand	dry, humid	couples and families
Pattaya	Gulf of Thailand	short rains	entertainment, kids
Phangan	Gulf of Thailand	dry	young people, nature
Krabi	Andaman Sea	downpours	rock climbing, families
Chiang Mai	mountains, no sea	hot and dry	temples, trekking
Koh Tao	Gulf of Thailand	dry	diving

Phuket

Phuket is one of the country's largest islands and lies in the Andaman Sea. It has everything: long sandy beaches, jungle-covered hills, waterfalls, and coral reefs.

The island's infrastructure covers any need. Divers head to the reefs, where stingrays, octopuses, and whale sharks live. Families spend their days at water parks, the zoo, and the botanical garden. In the evening, restaurants, bars, and clubs stay open.

Who it's for: diving, nightlife, a wide choice of hotels.
Not for: if you're looking for quiet, the south of the island won't work.
The catch: by late May, downpours hit almost every day.

Finding a place to stay here is easy: Phuket hotels on Trip.com.

Samui

Samui lies in the Gulf of Thailand and is considered the kingdom's most balanced island. The hilly interior is covered in jungle, and the shore has coral-tinted sand.

Tropical beach with palm trees, a hill, and turquoise sea

The mountains have waterfalls and viewpoints. From them you can see the whole island and the neighboring bays. The atmosphere favors a calm vacation: villas, bungalows, and hotels sit right by the water.

There are activities for every taste: yachting along the coast, elephant rides, fishing, snorkeling, jeep safaris. Thai massage and mud baths at spas give you more reasons to stay longer.

Who it's for: couples, families, anyone who values green scenery.
The catch: humidity in May is high.

Samui hotel prices

Also put the island's Buddhist temples and pagodas on your itinerary.

Pattaya

Pattaya is considered the country's main mainland resort. The city sits on the eastern shore of the Gulf of Thailand and runs non-stop.

Beaches stretch along palm groves, and low hills are covered in tropical forest. Rice fields and fruit tree plantations lie nearby.

Pattaya bay and beach from the viewpoint

There are more entertainment options here than in any other city in the country. Scooter and banana boat rides, diving, snorkeling, flyboarding, fishing. For kids, there are botanical gardens, zoos, museums, and water parks. Beyond that, there are elephant, crocodile, and snake farms.

On a hill above the city stands a gilded Buddha statue, reached by a long staircase with stone serpents along the sides. Nong Nooch Park is known for its landscaped gardens and animal shows.

Who it's for: nightlife, water activities, vacations with kids.
Not for: if you want a quiet beach, the city center won't work.
The catch: the city beach falls short of the island beaches.

Pattaya hotels on Trip.com

In the evening, Walking Street with its neon signs awaits you.

Phangan

Phangan lies in the Gulf of Thailand and is valued for its wild nature. Jungle, emerald hills, cozy bays, and white sand sit alongside hotels, villas, and bungalows.

Waterfalls cascade down among the hills. You can alternate beach time with jungle walks. Party lovers will find bars and nightclubs, while calm guests can head to quiet bays.

The underwater world of coral reefs is another strong side of the island. Besides diving, yoga, spas, elephant rides, and kayaks are available. Viewpoints offer a panorama of the whole island.

Who it's for: young people, divers, anyone seeking nature without crowds.
The catch: infrastructure is simpler than on Phuket.

Phangan hotels on Trip.com

Ancient Buddhist temples with red pagodas complete the picture.

Krabi

Krabi is called a province for lovers of pristine nature. Limestone cliffs, white beaches, caves, and palm groves shape its landscape.

The coastline is cut by bays, and rocky islands rise out of the sea. The province suits family vacations: you'll find secluded stretches on long sandy beaches.

Attractions include nature reserves with mangrove forests, waterfalls, lakes, and hot springs. Rock climbing, underwater caves, and kayaking through narrow lagoons draw active travelers.

Who it's for: rock climbing, kayaking, quiet family vacations.
The catch: without transport you won't get far.

hotels in Krabi on Trip.com

Chiang Mai

Chiang Mai is considered the northern and cultural capital of Thailand and is second in size only to Bangkok. There's no sea here, but there are plenty of temples and mountain landscapes.

The city sits in a fertile valley along the Ping River. Around it, hills, rice fields, fruit plantations, waterfalls, and lakes alternate. The old quarter is enclosed by a brick wall, and inside you'll find many Buddhist temples.

People come here for active recreation: elephant excursions, river rafting, auto safaris, trekking through tropical jungle. The city has a zoo with pandas, art galleries, cafes, and wellness centers. Shady parks with ponds are good for leisurely walks.

Who it's for: temples, trekking, food.
Not for: there's no beach vacation here.
The catch: May is hot and dry.

hotels in Chiang Mai on Trip.com

Koh Tao

Koh Tao lies in the Gulf of Thailand and is shaped like a turtle. The island is known for diving and snorkeling.

Ban Mae Had street with shops and motorcycles

The water is clear, currents are weak, and the reefs are full of marine life. Conditions are easy for beginners: dives start right from the shore.

Most of the island is covered by rocky hills with palm trees, while granite boulders line the water's edge. Infrastructure is concentrated on the west and south coasts: villas, bungalows, spas, restaurants, and shops. Water activities include catamarans, scooters, and kayaks.

Who it's for: diving, snorkeling, peace and quiet.
The catch: fewer hotels and restaurants than on Samui.

accommodation on Koh Tao on Trip.com

What to see in spring

Thailand's attractions aren't limited to beaches. In May, lines are shorter, and you can fit more into the same vacation time.

Ayutthaya Historical Park is a UNESCO World Heritage Site. Ruins of temples, palaces, and monuments survive across its vast grounds. It's easy to reach from Bangkok; the trip takes under two hours.

Grand Palace in Bangkok at sunset by the river

In the capital, the key stop is the Grand Palace with the Temple of the Emerald Buddha. Tickets are sold from morning until midday only, so it's best not to put off the visit. The dress code is strict: covered shoulders and knees, no flip-flops. Arrive at opening time, while the heat is milder and there are fewer groups.

Maya Bay lies on the island of Phi Phi Leh. Sheer cliffs enclose it on three sides, and the lagoon water is turquoise. Boats bring visitors here from Phuket and Krabi.

In the north lies Doi Inthanon National Park. At 2,565 meters high and covering 482 km², it is the country's highest mountain range (as of 09/2026, Wikipedia). Wooden walkways wind through the jungle, with waterfalls and caves nearby.

Entertainment and water sports

At Thai resorts, you can easily fill your vacation. Diving, snorkeling, fishing, sailing, surfing, and rock climbing are available on almost every island.

Temple of the Emerald Buddha in Bangkok at sunset

National parks and nature reserves showcase exotic flora and fauna. Buddhist temples and Buddha statues round out the cultural program.

Thai massage and wellness centers are considered the country's calling card. Body wraps and cosmetic treatments cost noticeably less here than in Europe. Elephant rides, island excursions, and ATV tours through the jungle are also in demand.

For kids, there are water parks, zoos, and entertainment complexes with museums and galleries. You can compare options in advance on GetYourGuide.

Vacationing with kids

Thailand works well for family vacations. The warm sea, gentle entry into the water, and short May rains make life easier for parents.

Wild elephant on a green meadow in Thailand

Modern hotel complexes are built with kids in mind: pools, playgrounds, spacious rooms. Bungalows suit those who want to stay closer to the water.

Koh Samui and Pattaya have the most developed infrastructure. The climate there is milder than in other regions, and the beaches are wide with sandy bottoms. You can add a jungle excursion, a boat trip, or a visit to waterfalls.

Water parks, aquariums, zoos, and amusement rides operate year-round. Bring extra water and hats: the May sun is strong even on a cloudy day.

Who it's for: families with kids who don't like long transfers.
The catch: the Andaman coast has waves, so swimming with toddlers is sometimes restricted.

Visa and entry rules

The rules changed on September 15, 2026. Thailand canceled the 60-day visa-free entry for 93 countries and returned to 30 days.

The new rules were confirmed in a Royal Gazette publication: the Ministry of Interior decree was issued on August 31, 2026 (as reported by The Phuket Express, 09/2026).

For a two-week trip, this period is enough. If you're planning to winter there, arrange a visa or extension in advance.

At the border, immigration may ask for a return ticket, hotel confirmation, and proof of funds. The exact list of documents depends on your citizenship, so check it before you fly. Entry rules change, so verify them on the embassy website before buying tickets. For transit connections in Bangkok, conditions depend on the airline and the type of layover, so check those separately.

Tour package prices

A package tour in May is usually cheaper than traveling independently. The price already includes flights, transfers, hotel, insurance, and breakfasts.

Sometimes an 11-night tour costs less than a 9-night one. Tour operators tie charter dates to departure schedules, so compare both options.

Prices depend on the hotel category and distance to the beach. A quiet vacation without excursions costs less than a packed itinerary.

Hotel prices

Thailand has plenty of hotels, and most maintain a comfortable standard. The cost depends on the resort, season, category, and distance from the beach.

If you're planning excursions, book a bed-and-breakfast style hotel. For a leisurely stay, complexes with large grounds and a pool work well.

May is considered low season on the Andaman Sea, so prices drop. On Koh Samui and Koh Phangan, discounts are smaller: the weather is better there and demand is steadier.

You can check current hotel prices in Thailand on Trip.com.

Excursions across the provinces

A vacation in Thailand is hard to imagine without excursions. Even within a single province, you'll see both natural and man-made attractions.

Brick prangs of Wat Chaiwatthanaram in Ayutthaya

Guides design routes to fit more into a day. Boat trips to Phuket, Phi Phi, Koh Chang, and Koh Samui are popular. They also include waterfall valleys, caves, and lagoons among the rocks.

Separate programs focus on fruit plantations and elephant farms. A trip to Bangkok combines ancient temples with modern infrastructure.

In May, some sea departures are rescheduled due to waves. Check this when booking and choose a morning excursion. You can pick an option in advance on GetYourGuide.

Food prices

Food becomes a separate expense category. All-inclusive is rare in Thailand, so you choose your own meals.

The options are vast: street cafes, markets, food courts in shopping malls, and food trucks. A portion of rice with chicken, soup, or noodles costs less than a coffee in Europe.

Seafood, rice, pork, pasta, and salads are available in any city. Markets and supermarkets sell fruit year-round: mango, mangosteen, rambutan, dragon fruit.

It's cheaper to eat where locals eat and to stay away from the main beaches. In tourist areas, the markup is several times higher.

What travelers say

Guest impressions agree on one thing: May at Thai resorts is calmer than the forecast suggests. Here's what comes up most often in trip reports.

Phuket. Travelers note the humid air and the scent of flowering trees right outside the airport. Hotels with green grounds are surrounded by palm trees, and the beach is usually just across the road. Kids enjoy the zoo, dolphinarium, and botanical garden. Adults add excursions, most often to the Big Buddha monument on the hill.

Koh Chang. This island is recommended for those who want quiet. Guests stay in wooden bungalows a few meters from the water. The shore is lined with palm trees, and hills with dense vegetation rise inland. A separate day is usually set aside for Than Mayom waterfall. The infrastructure is modest: cafes mostly offer European cuisine.

Pattaya. The city is described as noisy and dynamic. Walking Street glows with neon at night, with bars, clubs, and massage parlors. People often go swimming on the nearby island of Koh Lan: the beaches and water are cleaner there. The itinerary includes Nong Nooch park, a miniature park, and a cabaret show. Among temples, the Sanctuary of Truth with its wood carvings is mentioned most often.

The overall tone of the reports is calm. People write that the heat is easier to bear near the water, and the humidity bothers them less than the forecast suggested. Guests recommend booking a hotel with green grounds and a pool. Waves on the Andaman coast are rarely mentioned: swimming is possible, but with caveats.

The overall takeaway is simple. May offers the same nature as high season, but cheaper and without the crowds. The catch: the weather can change your plans. So bring a raincoat, plan the beach for the morning, and keep one backup day for excursions.

⁉️🤔 Frequently asked questions

Is May a good time to visit Thailand?

Yes, if you choose the right coast. May downpours are short and mostly at night. Prices are lower, and there are fewer tourists. May works for a beach vacation if you're ready for high humidity.

Which resort should I choose in May for a beach vacation?

For dry weather, choose Koh Samui, Koh Phangan, or Koh Tao. May stays sunny there, and the sea is calm. If diving and infrastructure matter more, go to Phuket: the reefs are excellent. Keep in mind that some sea departures in May are rescheduled due to waves. For families with kids, Koh Samui and Pattaya are the best options.

How much does a vacation in Thailand cost in May?

A package tour costs less than traveling independently: the price already includes flights, transfers, hotel, and breakfasts. Hotels on the Andaman coast drop in price more in May than on Koh Samui. Street food costs less than European food, and excursions can be booked on site or online in advance.

Do I need a visa to enter Thailand?

From September 15, 2026, visa-free entry for 93 countries was reduced from 60 to 30 days (as reported by The Phuket Express, 09/2026). For a two-week vacation, this is enough. If you plan to stay longer, arrange a visa or extension in advance.

What should you not do in Thai temples?

Don't enter a temple in shorts, tank tops, or open shoes: shoulders and knees must be covered. Don't turn your back to Buddha statues, don't hug them, and don't touch them without reason. Loud emotions and raised-voice arguments are considered disrespectful to local traditions.

How warm is the sea in May?

The sea is warm in May, and swimming is comfortable even in the rain. On the Andaman coast, waves sometimes stir up sediment, and snorkeling visibility drops. On Koh Samui, the water is calmer and clearer. After a downpour, the air is humid, so towels dry slowly.

In short: what to book

The decision matrix is simple. If you want a dry and calm beach, choose Koh Samui, Koh Phangan, or Koh Tao. If diving and nightlife are the priority, choose Phuket or Pattaya. For families with kids, Koh Samui and Pattaya work well. For temples and trekking, head to Chiang Mai.

Book accommodation in advance: in May, hotels on the Andaman coast get cheaper, but the best options go fast. You can compare prices on Trip.com and find excursions on GetYourGuide.

Thailand in May 2026: which resort to choose and where it is dry