Practical guide
Green season. The Gulf coast gets the sun while the Andaman side gets the storms.
June is the start of the green season, and a good month if the plan fits it. The Andaman coast (Phuket, Krabi, Phi Phi) is rainy with rough seas, and Koh Chang gets very wet, but the Gulf islands (Koh Samui, Koh Phangan, Koh Tao), Hua Hin and Pattaya get a sunny stretch. Bangkok and Chiang Mai have storms most afternoons and dry mornings. Prices are low and the crowds are gone, which makes June good value for anyone who doesn't need a guaranteed blue sky every day.
Averages for eight weather stations, one for each part of the country. Tap a region in the table to jump to it, or switch to °F and inches.
| Region | High | Low | Rain | Rain days | Sea |
|---|---|---|---|---|---|
| Bangkok | 34°C | 26°C | 198 mm | 13 | – |
| Chiang Mai | 33°C | 25°C | 118 mm | 12 | – |
| Phuket | 33°C | 26°C | 249 mm | 16 | 30°C |
| Koh Samui | 33°C | 25°C | 134 mm | 10 | 30°C |
| Pattaya | 32°C | 26°C | 132 mm | 10 | 30°C |
| Hua Hin | 33°C | 26°C | 82 mm | 9 | – |
| Koh Chang | 32°C | 24°C | 777 mm | 23 | 30°C |
| Isan | 34°C | 25°C | 146 mm | 10 | – |
Central plains and the capital
Highs of 34°C and lows of 26°C, 198 mm of rain on about 13 days, 5.3 hours of sun a day.
Rainy season, with storms most afternoons or evenings and dry mornings. Do the temples early and keep malls, spas and food for later.
The north: Chiang Mai, Chiang Rai, Pai
Highs of 33°C and lows of 25°C, 118 mm of rain on about 12 days, 4.9 hours of sun a day.
Green season in the north. Rain falls on many days, but rice terraces and waterfalls are at their best and the air is clean.
Andaman coast: Phuket, Krabi, Koh Lanta, Khao Lak
Highs of 33°C and lows of 26°C, 249 mm of rain on about 16 days, sea at 30°C.
Regular downpours and big swell on the west coast, so swimming at Patong, Kata and Karon is often unsafe. Good for cheap hotels and spa days.
Gulf islands: Koh Samui, Koh Phangan, Koh Tao
Highs of 33°C and lows of 25°C, 134 mm of rain on about 10 days, sea at 30°C.
Sunny spells and much less rain than the Andaman side, since the Gulf islands' rainy season comes later in the year. A good month for Koh Samui, Koh Phangan and Koh Tao.
Upper Gulf: Pattaya, Koh Samet, Rayong
Highs of 32°C and lows of 26°C, 132 mm of rain on about 10 days, sea at 30°C.
Showers, but Pattaya is in a sheltered part of the Gulf and gets far less rain than the west coast.
Western Gulf: Hua Hin, Cha-am, Pranburi
Highs of 33°C and lows of 26°C, 82 mm of rain on about 9 days, 4.7 hours of sun a day.
Light showers and plenty of dry days, which makes Hua Hin one of the driest beach towns in the rainy season.
Eastern seaboard: Koh Chang, Koh Kood, Koh Mak
Highs of 32°C and lows of 24°C, 777 mm of rain on about 23 days, sea at 30°C.
Very wet. The Trat coast takes the full force of the monsoon from June to September, and some smaller resorts close for the season.
Northeast: Khon Kaen, Udon Thani, Korat, Buriram, Ubon
Highs of 34°C and lows of 25°C, 146 mm of rain on about 10 days, 5.1 hours of sun a day.
Rainy season and rice planting across the northeast, green and quiet.
Source WMO Climatological Standard Normals 1991–2020 (Thai Meteorological Department stations). Averages for 1991–2020, and rain days count days with at least 1 mm. Sea temperatures: Climates to Travel monthly sea-surface averages. Koh Chang uses the Trat station on the facing mainland and Isan uses Khon Kaen.
Arriving in Koh Samui
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The Gulf coast is the answer for beaches in June. Koh Samui, Koh Phangan, Koh Tao and Hua Hin get far less rain than Phuket and Krabi, and the sea on the Gulf side is calmer.
City sightseeing works fine in June, since storms are short and the trains keep running. The north is green and the burning-season haze is long gone.
June to September is Koh Chang's wettest stretch, with some of the highest rainfall in the country. Save it for November to April.
June is quiet for festivals, which is part of its low-season appeal.
A public holiday. Banks and government offices close.
The ghost festival in the small northeastern town of Dan Sai, with masked dancers and processions. The dates are set by local spirit mediums each year, so check before planning a trip around it.
Haad Rin, Koh Phangan, in one of the island's drier months.
For the afternoon storms. Most mornings are dry.
Streets can flood briefly after a storm, so sandals beat sneakers.
For boat trips and sudden downpours.
The sun between storms is strong, especially on the Gulf islands.
Common questions about thailand in june.
Other months, and the whole year at a glance
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Written by
Mac Kiley
I lived in Bangkok for four years and traveled the country from there. The guides are my own opinions, written the way I'd explain them to a friend planning a trip.
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