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

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.

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.

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.

Get Personalized Tanning Sessions

Tan AI calculates your perfect tanning time based on real-time UV, your skin type, and goals.