Thailand in April: What to Expect Before You Go

April is the hottest month of the year in Thailand. There is no way around that fact and no point softening it. Daytime temperatures across most of the country sit in the mid to high thirties, humidity is high, and the sun is intense. If heat is your main concern, April will test you.

It is also the month of Songkran, Thailand’s Thai New Year festival and one of the biggest water fights in the world. For many visitors, Songkran is the entire reason to come in April. For others, it is a reason to delay the trip. Understanding what Songkran actually involves will help you decide which camp you are in.

Outside of the festival period, April is shoulder season for most destinations. Prices are lower than peak, crowds are thinner, and the beaches are in good shape before the monsoon arrives in May. If you time it right, April can be a very good month to visit.

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Weather in Thailand in April

April is consistently the hottest month across the whole country. The cool season is long over, the monsoon has not yet arrived, and the sun has enough strength to make midday outdoor activity genuinely uncomfortable in most places.

The average humidity in Thailand in April is around 75%

Bangkok and central Thailand regularly hit 36 to 38 degrees in April. Humidity sits around 70 to 80 percent and makes the heat feel heavier than the thermometer suggests. The city is functional and everything is open, but you will want air conditioning as a serious part of your day.

The south is slightly more forgiving. Sea breezes keep the coast a few degrees cooler than inland areas and both coasts are still in good shape before the monsoon shift in May. Phuket and Krabi are warm but manageable. Koh Samui and Hua Hin on the Gulf side have excellent conditions.

The north has the added problem of the burning season, which typically runs from late January through to mid-April. Air quality in Chiang Mai and Chiang Rai can be poor to very poor through most of April, and we would not recommend planning outdoor activities there until the rains come and clear the smoke.

Temperature & Rainfall In April

Location	Avg. High (°C)	Avg. Low (°C)	Days of Rainfall
Bangkok	35	26	6
Chiang Mai	37	25	8
Phuket	34	26	12
Koh Samui	31	25	8
Hua Hin	34	24	6
Ayutthaya	37	26	5

Check the Thai Department of Meteorology for current forecasts before you travel.

Is April a Good Time to Visit Thailand?

It depends entirely on how you handle heat and whether Songkran is on your radar. April is not the comfortable, easy month that November or December is. But it has genuine advantages if you go in prepared.

Reasons to visit Thailand in April

• Songkran is one of the most impressive festivals in Asia and experiencing it in Thailand is worth the heat
• Accommodation prices outside the Songkran dates are lower than peak season
• Beach conditions on both coasts are still good before the monsoon arrives
• Crowds at most non-Songkran sites are much lower than the November to February peak
• The Similan Islands are still open in early April before closing in mid-May
• Fruit season is at its peak in April, with durian, mangoes, rambutan and jackfruit all widely available

Reasons to think twice

• April is genuinely, seriously hot and humid, and midday outdoor activity is unpleasant almost everywhere
• Hotel prices spike sharply around Songkran dates, particularly in Bangkok, Chiang Mai and Phuket
• The north is still affected by burning season smoke for most of April
• Traffic and transport around Songkran is heavily disrupted as Thais travel home for the holiday
• If you are visiting temples or outdoor sites, the heat and crowd combination during Songkran week can be exhausting
• Alcohol sales are restricted on 13 April (Thai New Year’s Day) and sometimes longer depending on government announcements

Where to Go in Thailand in April

Bangkok

Bangkok works well in April if you accept it is hot and plan your days accordingly. Mornings are the time to be outside. The temples, the markets and the riverside are all manageable before midday. After that, the city’s air-conditioned malls, museums and coffee shops become genuinely useful.

During Songkran, Bangkok is a city-wide water fight. Silom Road and Khao San Road are the two main zones. Silom draws a younger, party-focused crowd and can get intense. Khao San is chaotic and fun in a different way. If you want to experience Songkran without being in the thick of it, the riverside temples offer a quieter version of the festival with more traditional ceremony and less foam.

Book accommodation well ahead if you are coming for Songkran. Prices rise steeply in the week of 13 to 15 April and popular properties sell out.

Chiang Mai

Chiang Mai hosts one of the most famous Songkran celebrations in the country, with the old city moat becoming the centre of the water fights and festivities running for up to ten days rather than three. If Songkran in Chiang Mai is on your list, it is worth knowing what you are signing up for: very hot, very wet, very crowded and very good fun if that is your thing.

Outside of Songkran, we would suggest skipping Chiang Mai in April. The burning season smoke lingers through most of the month and outdoor sightseeing is compromised by poor air quality. If the air quality index matters to you, check it before committing to time in the north.

Ayutthaya

Ayutthaya in April is a heat challenge. The site involves a lot of open ground walking with direct sun exposure, and April temperatures in the Ayutthaya area regularly hit 37 degrees. That said, mornings are manageable and the site is significantly less crowded than in peak season. Start as early as you can, carry water, and do not try to cover everything in one go.

Phuket and the Andaman Coast

April is one of the last good months on the Andaman coast before the southwest monsoon arrives in May. Phuket, Krabi and the surrounding islands are warm, mostly dry and the sea is still calm enough for comfortable boat travel and good diving visibility.

This changes in May, so if the Andaman coast is your priority, April gives you a decent window. Just be aware that some years the monsoon arrives early and sea conditions can deteriorate by the end of the month.

Khao Sok

Khao Sok National Park in Surat Thani is worth considering in April before the wet season makes access more difficult. The park is one of the oldest rainforests in the world and April is a good month to be there, with the landscape green and wildlife active. Accommodation ranges from floating cabins on the lake to treehouses in the forest, which makes it a different kind of April trip to a beach holiday.

Best Islands to Visit in Thailand in April

• Phuket is warm and mostly dry in April with short afternoon storms that clear quickly. Good beach conditions but book ahead as it stays busy.
• Similan Islands are open in April but close from mid-May. If diving the Similans is on your list, April is your last chance before October.
• Krabi has dramatic limestone coastline and calm seas in April. Afternoon storms are short and the mornings are excellent for boat trips and snorkelling.
• Koh Samui sits on the Gulf side and sees less rainfall than the Andaman islands in April. A good call if you want reliable beach weather.
• Koh Yao Noi and Koh Yao Yai in Phang Nga Bay are quieter alternatives to Phuket and Krabi. Positioned between the two, they are easy to reach by boat and far less developed. See our Koh Yao islands guide for more detail.

See our island hopping guide for more detailed advice.

The Similan Islands are still open in early April and water conditions are good for diving before the seasonal closure in mid-May. Erawan Falls in Kanchanaburi also runs well in April as the early rains begin to build the water volume. Weekdays are much quieter than weekends at Erawan.

Festivals and Events in Thailand in April

Songkran – 13 to 15 April 2026

Songkran marks the Thai New Year and is celebrated across the entire country from 13 to 15 April. At its heart, it is a water festival rooted in Buddhist tradition, where water is used to wash away the previous year and welcome the new one. In practice, it has become a multi-day national water fight that takes over streets, shopping precincts and public spaces.

The official three-day holiday is 13 to 15 April, but celebrations in many cities run longer. Chiang Mai is famous for extending the festivities for up to ten days. Bangkok’s main zones are Silom and Khao San Road. Phuket, Pattaya and Koh Samui all hold their own events.

A few things worth knowing before you go: protect your phone and camera before stepping outside during Songkran. Everything gets wet. Keep valuables in a waterproof bag. Respect the fact that some people, particularly older Thais, use this as a time for quiet temple visits and family ceremony rather than water fights. The traditional side of the festival is worth seeing if you can find it.

Book accommodation for Songkran week well in advance. Prices go up and availability goes down quickly once the dates are confirmed each year.

Chakri Day – 6 April 2026

Chakri Day is a national public holiday commemorating the founding of the Chakri dynasty. Government offices and banks are closed. Most tourist attractions, restaurants and shops remain open, so it has minimal impact on travel plans.

Travel Tips for Visiting Thailand in April

Plan your days around the heat. This is not optional in April. Get outside before 9am. Aim to be somewhere with air conditioning by noon. Resume outdoor activities after 4pm when the temperature drops slightly. Any other approach will exhaust you by day three.

Protect your electronics during Songkran. Water gets everywhere during Songkran week and it gets there fast. A waterproof phone case or a basic dry bag will save you significant money and frustration. Do not carry anything you cannot afford to lose or replace.

Build transport time into your Songkran plans. Traffic around Songkran is heavy and unpredictable across the country as millions of Thais travel home for the holiday. Bus stations and airports are busy. If you are moving between cities around 12 to 16 April, add more buffer time than usual.

Check alcohol restrictions. Alcohol sales are restricted by law on Thai New Year’s Day and sometimes on additional days depending on government announcements. Stock up the day before if this matters to you, or check locally what applies where you are staying.

Pack sun protection as seriously as you pack anything else. April sun in Thailand is strong and the UV index is high. Sunscreen, a hat and sunglasses are essentials. Reapply sunscreen after Songkran water fights.

Skip the north unless air quality has improved. Before planning anything in Chiang Mai or Chiang Rai in April, check the current air quality index. If it is reading above 150, outdoor sightseeing is not comfortable and potentially harmful for anyone with respiratory conditions.

Packing for an April trip to Thailand

April demands more thought about what you pack than most other months. The heat is intense and Songkran means at least some of your time will be spent soaking wet.

Light, breathable fabrics are essential. Natural fibres like linen and cotton handle the heat and humidity better than synthetics. Pack two changes of clothes per day as a baseline in April. A light long-sleeved layer is useful for temples and for air-conditioned restaurants that can be aggressively cold.

For Songkran, wear clothes you are happy to get completely wet and do not take anything valuable outside without a waterproof bag. A waterproof phone case is worth having before you arrive rather than hunting for one during the festival.

Sun protection needs to be taken seriously. High-factor sunscreen, a hat with a brim and sunglasses are not optional in April sun. Reapply sunscreen after any time in the water.

Is April right for you?

April asks more of you than most months. The heat is real, Songkran week is chaotic, and the north is not at its best. But Thailand in April also has things you cannot find in the comfortable, cooler months: Songkran itself, quieter beaches, lower prices outside the festival, and the strange, fevered energy of a country celebrating its new year all at once.

If you come prepared for the heat and go in with a plan, it is a memorable month to be here.

If you want more tips or advice for planning your trip, you can join our Facebook group: Thailand Awaits Trip Planning for Beginners. It’s a place to ask questions, get help from other travellers and locals, and find free resources for your Thailand holiday.