Thailand in June: ⚠️ a workable month, as long as you choose your region carefully. The southwest monsoon has set in: 249 mm (9.8 in) of rain in Phuket and 286 mm (11.3 in) in Ko Lanta, with around fifteen rain days, which makes it the coast to avoid. The Gulf is the best choice: Hua Hin (82 mm (3.2 in)) and Ko Samui (134 mm (5.3 in)) get much less rain. Bangkok and the north see frequent showers (about 3 days a week) but rarely all day long.
It is hot everywhere (32–34 °C / 90–93 °F in the afternoon) and storms break mostly late in the day. We compared the official normals of nine weather stations to work out where to go. For the overall picture, see our page on the best time to visit Thailand.
Thailand in June: key facts
- Verdict: ✅ Gulf (Hua Hin, Ko Samui, Ko Phangan, Ko Tao); ⚠️ Bangkok and the north; ❌ Andaman beaches
- Bangkok: 34.1 °C (93 °F) in the afternoon, 26.4 °C (80 °F) at night, 199 mm (7.8 in) and 13 rain days
- Phuket: 249 mm (9.8 in) and 16 rain days; Ko Samui: 134 mm (5.3 in) and 10 days
- Rainy season over most of the country (heavy rain from April to November)
- Entry: visa-exempt tourist stays of up to 30 days per entry for US and UK citizens since 15 September 2026 (Tourism Authority of Thailand); TDAC arrival card mandatory
Thailand weather in June: region by region
| Station | Region | Max °C (°F) | Min °C (°F) | Rain mm (in) | Rain days | Per 7 days | Verdict |
|---|---|---|---|---|---|---|---|
| Bangkok | Central | 34.1 °C (93 °F) | 26.4 °C (80 °F) | 198 mm (7.8 in) | 13.4 | 3 | ⚠️ |
| Chiang Mai | North | 33.2 °C (92 °F) | 24.5 °C (76 °F) | 118 mm (4.6 in) | 11.6 | 3 | ⚠️ |
| Chiang Rai | Far north | 32.5 °C (90 °F) | 24.0 °C (75 °F) | 186 mm (7.3 in) | 14.6 | 3 | ⚠️ |
| Pattaya | Gulf (east coast) | 32.0 °C (90 °F) | 26.4 °C (80 °F) | 132 mm (5.2 in) | 9.8 | 2 | ⚠️ |
| Hua Hin | Gulf (west coast) | 33.4 °C (92 °F) | 26.1 °C (79 °F) | 82 mm (3.2 in) | 9.2 | 2 | ✅ |
| Ko Samui | Gulf (islands) | 32.7 °C (91 °F) | 25.3 °C (78 °F) | 134 mm (5.3 in) | 10.3 | 2 | ✅ |
| Surat Thani | Gulf (mainland) | 33.6 °C (92 °F) | 23.9 °C (75 °F) | 133 mm (5.2 in) | 12.3 | 3 | ⚠️ |
| Phuket | Andaman | 32.6 °C (91 °F) | 25.8 °C (78 °F) | 249 mm (9.8 in) | 15.9 | 4 | ❌ |
| Ko Lanta | Andaman (Krabi) | 31.9 °C (89 °F) | 25.3 °C (78 °F) | 286 mm (11.3 in) | 15.1 | 4 | ❌ |
Destination de Voyage calculation based on these normals: in June, Phuket and Ko Lanta get about 4 rain days a week, against 2 in Hua Hin and Ko Samui. Rainfall in Ko Lanta is 3.5 times higher than in Hua Hin. In Bangkok, June gets roughly as much rain as May (199 vs 217 mm (8.5 in)), and about 8 times more than January. Temperatures, on the other hand, vary little from one station to another: from 31.9 °C (89 °F) in Ko Lanta to 34.1 °C (93 °F) in Bangkok.
June compared with May and July
| Station | May | June | July |
|---|---|---|---|
| Bangkok | 35.1 °C (95 °F) / 217 mm (8.5 in) | 34.1 °C (93 °F) / 199 mm (7.8 in) | 33.5 °C (92 °F) / 190 mm (7.5 in) |
| Chiang Mai | 34.7 °C (94 °F) / 168 mm (6.6 in) | 33.2 °C (92 °F) / 118 mm (4.6 in) | 32.1 °C (90 °F) / 149 mm (5.9 in) |
| Phuket | 33.2 °C (92 °F) / 237 mm (9.3 in) | 32.6 °C (91 °F) / 249 mm (9.8 in) | 32.3 °C (90 °F) / 240 mm (9.4 in) |
| Ko Samui | 32.9 °C (91 °F) / 132 mm (5.2 in) | 32.7 °C (91 °F) / 134 mm (5.3 in) | 32.3 °C (90 °F) / 117 mm (4.6 in) |
| Hua Hin | 33.7 °C (93 °F) / 96 mm (3.8 in) | 33.4 °C (92 °F) / 82 mm (3.2 in) | 33.0 °C (91 °F) / 90 mm (3.5 in) |
May, June and July are alike: the rainy season has set in over most of the country, while the Gulf remains the most stable area. In Chiang Mai, June is even slightly less rainy than May and July. The UK FCDO (GOV.UK, updated 12 October 2026) puts the rainy season generally from May to October, and from November to March on Koh Samui and in south-east Thailand. These normals are the same as on our page on the best time to visit Thailand.
Where to go in Thailand in June
- Gulf islands (Ko Samui, Ko Phangan, Ko Tao): the best choice for beaches; see when to go to Ko Samui.
- Hua Hin: the least rainy station in the table (82 mm (3.2 in)), easy to reach from Bangkok.
- Bangkok and the centre: sightseeing is fine, showers late in the day; see when to go to Bangkok.
- The north: green landscapes; see when to go to Chiang Mai.
- Andaman coast (Phuket, Krabi, Ko Lanta): often rough seas, frequent red flags, some boat trips suspended; see when to go to Phuket.
What to do in Thailand in June
- Diving and snorkelling around Ko Tao, in good season on the Gulf side
- Bangkok’s temples and markets in the morning, before the storms
- Rice fields and waterfalls in the north, at their best with the rains
- Cooking classes and Thai massages for rainy afternoons
What to avoid or plan for in June
- Swimming on the Andaman coast when the red flag is up: currents are dangerous in the monsoon season
- Caves, lakes and waterfalls: the UK FCDO warns they are particularly at risk of dangerous flash flooding in the rainy season
- Mountain roads just after a heavy storm: check their condition before setting out
- Mosquitoes: dengue is present in Thailand; protect yourself, especially in the rainy season
Booking for June
On the Andaman side, some boat trips may be suspended in rough seas: keep your schedule flexible. For rates and availability, compare hotel websites directly; we do not publish unsourced average prices.
What to pack for Thailand in June
- Light, quick-drying clothes
- A poncho or compact umbrella
- Sandals that can get wet
- Sunscreen and hat
- Clothing that covers shoulders and knees for temples
- Insect repellent and a waterproof pouch
Entry requirements and safety
US citizens: according to the U.S. Department of State (page last updated August 20, 2026), pre-arrival online registration is required. A passport valid for at least six months beyond arrival is strongly recommended, and you may be asked for an onward or return ticket or proof of funds.
UK citizens: according to the UK FCDO (GOV.UK, updated 12 October 2026), your passport must be valid for at least 6 months after arrival, with 1 blank page. From 15 September 2026, visa-exempt entry is up to 30 days, for tourism only. Visa-exempt entries over land borders are normally limited to 2 per calendar year. You may need proof of funds (10,000 THB per person or 20,000 THB per family) and onward travel. The overstay fine is 500 THB a day, up to 20,000 THB.
The Thailand Digital Arrival Card (TDAC) has been mandatory for all foreign nationals since 1 May 2025 and can be completed within the 3 days before arrival. The U.S. State Department page (last updated August 20, 2026) still mentions 60 days, but it predates the change: under the Thai rules in force since 15 September 2026, US citizens are also limited to 30 days (Tourism Authority of Thailand, 1 September 2026). Check with the Royal Thai Embassy in Washington before you travel.
Safety: the FCDO advises against all but essential travel to Pattani, Yala, Narathiwat and parts of southern Songkhla (Thailand–Malaysia border), and to areas within 20 km (12 mi) of the Cambodian land border; land crossings with Cambodia are suspended. Time difference in June: Thailand (UTC+7, no daylight saving) is 6 hours ahead of London and 11 hours ahead of New York.
If June does not suit you
Neighbouring months: Thailand in May is hotter, with the rains already established; Thailand in July is similar to June. For a country that is dry everywhere, aim for Thailand in February.
Other destinations in June: Bali, in the middle of its dry season, or Mauritius in June. All our ideas: where to go in June. For planning your route: our Thailand travel guide.
Frequently asked questions
Is June a good time to visit Thailand?
Yes if you choose the Gulf (Ko Samui, Ko Phangan, Ko Tao, Hua Hin). The Andaman coast is in the middle of the monsoon and less suited to a beach holiday.
What is the weather like in Thailand in June?
Hot and humid: 34.1 °C (93 °F) in Bangkok, 32.6 °C (91 °F) in Phuket, 32.7 °C (91 °F) in Ko Samui in the afternoon, with 82 to 286 mm (11.3 in) of rain depending on the station (1991–2020 normals).
Where is the weather best in Thailand in June?
In the Gulf: Hua Hin gets 82 mm (3.2 in) over 9 rain days, Ko Samui 134 mm (5.3 in) over 10 days, against 249 mm (9.8 in) over 16 days in Phuket.
Can you visit Phuket in June?
Yes, but it is the monsoon: about 4 rain days a week, often rough seas and swimming sometimes prohibited.
Is June the rainy season in Thailand?
Yes, over most of the country. Showers often fall late in the day; the Gulf is the least affected area.
Do I need a visa for Thailand?
No visa is needed for tourism stays of up to 30 days per entry: since 15 September 2026, this exemption applies to both US and UK citizens, according to the Tourism Authority of Thailand (1 September 2026) and the UK FCDO (GOV.UK, updated 12 October 2026). The U.S. State Department page (last updated August 20, 2026) still mentions 60 days, but it predates the change. Check with the Royal Thai Embassy before you travel. The TDAC digital arrival card is mandatory.
Our sources
- Thai Meteorological Department, 1991–2020 climate normals published by the World Meteorological Organization (NOAA NCEI archive): Bangkok Metropolis, Chiang Mai, Chiang Rai, Pattaya, Hua Hin, Ko Samui, Surat Thani, Phuket, Ko Lanta
- Entry requirements, safety and health checked on 24 October 2026: Tourism Authority of Thailand, TAT Newsroom, 1 September 2026: new 30-day visa exemption rules from 15 September 2026; UK FCDO, GOV.UK foreign travel advice: Thailand (updated 12 October 2026); U.S. Department of State, travel.state.gov: Thailand (last updated August 20, 2026)
- Our methodology
Updated October 2026.