30YearWeather
Koh Samui
When to avoid visiting Koh Samui, Thailand
Seasonal Comparison

Least Favorable Months in Koh Samui

Based on 30 years of NASA satellite data, Koh Samui enjoys relatively good weather year-round. However, if you're comparing months, October, November, January are the least favorable — though still perfectly visitable.

October54/100November54/100January59/100

Good news: Koh Samui has no truly bad months!

With a score of 54/100, even October(the "worst" month) is still a reasonable time to visit. These months are simply the least favorable compared to other months in Koh Samui, not objectively bad. Many travelers enjoy visiting during these periods and benefit from lower prices and fewer crowds.

Why October is the Least Favorable (But Still Okay) Time to Visit Koh Samui

Is October a Good Time to Visit Koh Samui?

👌Good option with minor considerations
Short Answer

Storm season alert for Koh Samui in October: beyond the 26°C, 67% rain averages, hurricane risk requires travel insurance and schedule flexibility.

Decision Factors

Typhoon season active

Western Pacific zone - expect potential typhoon activity

High rainfall period

67% rain probability, 6.7mm average

Vaccinations required

Yellow Fever

Warm tropical seas

30.3°C sea temperature - Hot Soup

Very high humidity

83% average humidity

Ideal temperature range

25.8°C - perfect for sightseeing and outdoor activities

Good For

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

Who Should Avoid

  • 👴
    Elderly travelers

    83% humidity creates difficult conditions

  • 🥾
    Outdoor enthusiasts

    67% rain probability disrupts outdoor activities

  • 📸
    Photographers

    84% cloud cover limits natural light opportunities

  • 💑
    Honeymoon couples

    Wedding score only 62/100 - better months available

930 observations30-year historical data
Confidence: 99%

Key Challenges During These Months

Heavy Rainfall

Monsoon or rainy season brings frequent downpours and potential flooding

Storm Season

Typhoons or hurricanes can disrupt travel and cause dangerous conditions

Months to Avoid: Detailed Breakdown

Worst54

October

Typhoon season active, High rainfall period

View details
2nd Worst54

November

Typhoon season active, High rainfall period

View details
3rd Worst59

January

Typhoon season active, Peak tourist season

View details

Looking for the Best Time Instead?

Discover the optimal months to visit Koh Samui with ideal weather conditions, fewer crowds, and better prices.

Best Time to Visit Koh Samui

Frequently Asked Questions

When should I avoid visiting Koh Samui?

Based on 30 years of data, the most challenging months are October, November, January. Primary concerns include: typhoon season active, high rainfall period.

What is the worst month to visit Koh Samui?

October is typically the most challenging month, scoring only 54/100 in our travel conditions analysis.

Can I still visit during these months?

Yes, many travelers still visit during challenging months. Come prepared with appropriate gear, flexible bookings, and backup plans. Lower prices and fewer tourists can offset the weather challenges.

Are hotels cheaper during these months?

Often yes. Low season typically means reduced hotel rates, easier reservations, and fewer crowds at popular attractions. Some travelers prefer this trade-off.