What is the UV index in Koh Samui, Thailand today?

Check the live UV index in Koh Samui, Thailand today on Daily UV Tracker. See peak UV level, safe sun time, hourly UV forecast and 7-day forecast with SPF sun protection advice. Data is updated continuously from Open-Meteo and OpenUV.

What is the UV index in Koh Samui, Thailand?

The UV index in Koh Samui, Thailand varies by season and time of day. Use Daily UV Tracker to see the current UV level, peak UV time, and hourly forecast so you can plan safe sun exposure.

When is UV highest in Koh Samui, Thailand?

UV is usually highest in Koh Samui, Thailand around solar noon, between 11 am and 3 pm local time. The daily peak depends on latitude, season, altitude and cloud cover.

How long can I stay in the sun in Koh Samui, Thailand?

Safe sun time in Koh Samui, Thailand depends on the current UV index and your skin type. Use the burn-time calculator on the page to get a personalised estimate based on the Fitzpatrick scale.

Koh Samui 今日のUV指数・ピークUVと7日間予報

Q: Do I need sunscreen in Koh Samui, Thailand?

Yes, on most days. Whenever the UV index in Koh Samui, Thailand reaches 3 or above, use broad-spectrum SPF 30–50 sunscreen, reapply every two hours and after swimming, and cover up around solar noon.

Q: What SPF should I wear in Koh Samui, Thailand?

SPF 30 is a sensible baseline in Koh Samui, Thailand, and SPF 50+ when the UV index is 8 or higher. Add sunglasses, a wide-brim hat and UPF clothing during peak UV hours.

Q: Can you get sunburnt on a cloudy day in Koh Samui, Thailand?

Yes. Up to 80% of UV radiation passes through light cloud, so you can still burn in Koh Samui, Thailand on overcast days. Check the hourly UV forecast rather than judging by brightness.

Koh SamuiのUV指数と予報 — 今日のピークUV、安全な日光時間、日焼け計算機、1時間ごとのUV予報、7日間のUV予報、SPF日焼け止め対策。

Koh Samui, Thailand is in Thailand (Southeast Asia). UV levels change through the day and across seasons. The strongest UV usually occurs around solar noon, so seek shade, wear sunscreen and protective clothing during the middle of the day.

Sun safety in Koh Samui, Thailand — your questions answered

What time is UV highest in Koh Samui, Thailand?

UV in Koh Samui, Thailand peaks around solar noon, usually between 11:00 and 15:00 local time. The hourly UV forecast on this page shows the exact peak UV hour for today.

Do I need sunscreen in Koh Samui, Thailand?

Whenever the UV index reaches 3 or above, use broad-spectrum SPF 30–50 sunscreen, reapply every two hours and after swimming, and cover up during peak UV hours.

What SPF should I wear in Koh Samui, Thailand?

SPF 30 is a sensible baseline in Koh Samui, Thailand; move to SPF 50+ when the UV index is 8 or higher. Add sunglasses, a wide-brim hat and UPF clothing. The burn-time calculator gives a personalised safe sun time by Fitzpatrick skin type.

Can you get sunburnt on a cloudy day in Koh Samui, Thailand?

Yes — up to 80% of UV passes through light cloud, so sunburn is still possible in Koh Samui, Thailand on overcast days.

UV index levels explained: UV 1 · UV 3 · UV 5 · UV 7 · UV 9 · UV 11

Nearby UV forecasts: Phuket, Thailand UV Index · Chiang Mai, Thailand UV Index · Bangkok, Thailand UV Index · Krabi, Thailand UV Index · Koh Tao, Thailand UV Index · Hua Hin, Thailand UV Index