Weather in Koh Samui in June
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Compare car hire prices → Affiliate link — we earn a commission at no extra cost to youIn June, Koh Samui sees average highs of 30.6°C (87.1°F) and lows of 26.2°C. Conditions are hot and fairly wet (18 rainy days on average), with roughly 10.3 hours of sunshine a day. Weather-wise, this is one of the most reliable months to travel. For the complete picture, see the best time to visit Koh Samui — every month compared. Once you know when to go, find your Koh Samui packing list at 247PackingList.
Get ready for Koh Samui in June
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Search Flights →Lightweight travel clothing
Lightweight, breathable clothing and a compact travel umbrella are essential in this climate.
Check Price →What to pack for Koh Samui in June
- Lightweight, breathable clothing
- High SPF sunscreen
- Sunglasses
- Sun hat
- Reusable water bottle
- Compact travel umbrella
- Waterproof jacket
- Quick-dry clothing
Compare all months in Koh Samui
| Month | High | Rain | Rating |
|---|---|---|---|
| January | 28.5°C | 43.1mm | 10/10 |
| February | 29.0°C | 58.2mm | 10/10 |
| March | 30.5°C | 36.5mm | 10/10 |
| April | 31.1°C | 106.9mm | 9/10 |
| May | 31.0°C | 134.5mm | 9/10 |
| June | 30.6°C | 102.4mm | 9/10 |
| July | 30.0°C | 149.9mm | 9/10 |
| August | 30.4°C | 114.2mm | 9/10 |
| September | 29.2°C | 196.8mm | 9/10 |
| October | 28.5°C | 244.4mm | 8/10 |
| November | 28.1°C | 323.1mm | 8/10 |
| December | 27.9°C | 161.7mm | 9/10 |
Full month-by-month guide: best time to visit Koh Samui →
For facts about Thailand — currency, language and dialling code — see our Thailand country guide at 247CountryInfo. Travellers also find it useful to keep a Koh Samui travel guide to hand. Check clothing sizes in Thailand before you shop.
Frequently Asked Questions
Is June a good time to visit Koh Samui?
June rates 9/10 for visiting Koh Samui — excellent time to visit. Expect average highs of 30.6°C, 102.4mm of rain across the month and about 10.3 hours of daily sunshine.
What is the temperature in Koh Samui in June?
In June, Koh Samui has average highs of 30.6°C (87.1°F) and average lows of 26.2°C (79.2°F).
Does it rain in Koh Samui in June?
Some rain is likely. Koh Samui averages 102.4mm across about 18 rainy days in June, so a light waterproof layer is worth packing.
What should I wear in Koh Samui in June?
For Koh Samui in June (30.6°C highs / 26.2°C lows), pack lightweight, breathable clothing plus high spf sunscreen, sunglasses, sun hat.
More essentials for Koh Samui in June
Packing cubes
Keep the bag organised whatever the weather — compression cubes for every size.
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.