UV Index in Koh Samui

Real-time UV forecast & tanning weather

Current Conditions

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Monthly UV Index in Koh Samui

Average daily maximum UV index by month

Jan	10	Very High
Feb	11	Extreme
Mar	12	Extreme
Apr	12	Extreme
May	11	Extreme
Jun	10	Very High

Jul	10	Very High
Aug	10	Very High
Sep	10	Very High
Oct	9	Very High
Nov	9	Very High
Dec	9	Very High

Best Months to Tan in Koh Samui

Based on average UV levels, the best months for tanning in Koh Samui are:

January Excellent February Excellent March Excellent April Excellent May Excellent June Excellent July Excellent August Excellent September Excellent October Excellent November Excellent December Excellent

Rating based on average monthly UV index

Tanning Guide for Koh Samui

Location & Climate

Koh Samui enjoys a tropical climate with high UV intensity year-round, though its rainy season differs slightly from the mainland. Chaweng Beach is a popular choice with its long stretch of sand and direct sun, while the quieter beaches on the north coast offer a more relaxed tanning experience.

Tanning Tips

UV levels in Koh Samui are high year-round due to its tropical location. Always wear SPF 30+ and limit initial sessions to 15-20 minutes.

Related Guides

Tanning in UV 9-10+ → Aggressive Tanning — What to Know → Safe Tanning Tips → Best Time of Day to Tan → How to Get Rid of a Tan →

Frequently Asked Questions

What is the UV index in Koh Samui right now?

The current UV index in Koh Samui is shown in the live weather section above. UV levels change throughout the day, typically peaking between 11 AM and 2 PM local time.

What is the best month to tan in Koh Samui?

The best months for tanning in Koh Samui are January, February, March, April, May, June, July, August, September, October, November, December, when average UV levels reach 7 or higher.

How long should I tan in Koh Samui?

Tanning time depends on your skin type and the current UV index. For a moderate UV of 10, a person with Skin Type III (medium complexion) can safely tan for about 15 minutes per session. Use our Tanning Calculator for personalized recommendations.

Is it safe to tan in UV index 12?

UV index 12 is classified as Extreme. Extreme — stay in shade during peak hours. Tanning is not recommended without strong protection.

When is the peak UV time in Koh Samui?

UV levels in Koh Samui typically peak between 11:00 AM and 2:00 PM local time. The exact peak depends on the season, cloud cover, and altitude.

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