What is the weather like in Koh Samui throughout the year?

Koh Samui experiences varying weather throughout the year. The warmest month is July with average highs of 28°C. The coolest month is December.

What is the weather like in Koh Samui in January?

Koh Samui in January scores 59/100 based on 30 years of climate data. Good option with minor considerations.

Who should visit Koh Samui in January?

January in Koh Samui is ideal for: Beach lovers, Outdoor enthusiasts, Cultural tourists, Honeymoon couples, Business travelers.

Best Time to Visit Koh Samui | 30-Year Weather Analysis

Why January is the Best Time to Visit Koh Samui

Is January a Good Time to Visit Koh Samui?

👌Good option with minor considerations(59/100)

Short Answer

Storm season alert for Koh Samui in January: beyond the 25°C, 22% rain averages, hurricane risk requires travel insurance and schedule flexibility.

Decision Factors

Typhoon season active

Western Pacific zone - expect potential typhoon activity

Vaccinations required

Yellow Fever

Warm tropical seas

28.4°C sea temperature - Tropical Bath

Peak tourist season

96% of annual peak - expect crowds and peak prices

Ideal temperature range

25.1°C - perfect for sightseeing and outdoor activities

Health precautions needed

Be aware of: Leptospirosis, Melioidosis, Dengue

Good For

🏖️
Beach lovers
28.4°C warm seas and 22% rain probability
🥾
Outdoor enthusiasts
Ideal hiking conditions: 25.1°C, 22% rain chance
🏛️
Cultural tourists
Comfortable conditions for exploring museums and sites
💑
Honeymoon couples
Wedding score 95/100 with romantic weather conditions
💼
Business travelers
Climate-controlled meetings unaffected by weather

Who Should Avoid

💰
Budget travelers
Peak season means premium prices everywhere
👴
Elderly travelers
78% humidity creates difficult conditions
💼
Business travelers
Storm season may cause flight disruptions

Warmest

July

28°C avg

Coolest

December

25°C avg

Driest

February

16% rain

Wettest

October

67% rain

Planning Your Trip to Koh Samui, Thailand

Wondering when is the best time to visit Koh Samui? Based on our analysis of 30 years of NASA satellite weather data, the ideal months to travel to Koh Samui are January, February, March. During these months, you'll experience optimal temperatures around 25°C with only 22% chance of rain.

The Koh Samui climate varies throughout the year. July is the hottest month with average highs of 28°C, while December is the coldest at 25°C. If you're planning outdoor activities or sightseeing in Koh Samui, avoid October when rainfall peaks at 67% probability.

For the best Koh Samui weather experience, we recommend visiting during February for the driest conditions or the shoulder months of January and February for a perfect balance of weather and fewer crowds.

Koh Samui Weather by Month: Climate Guide

Click any month to explore detailed daily forecasts for Koh Samui

🏆 85-100: Excellent👍 70-84: Great👌 55-69: Good🤔 40-54: Fair⚠️ 0-39: Challenging

When to Visit Koh Samui: Travel Style Guide

Personalized Koh Samui travel recommendations based on 30-year weather data

Beach Lovers

Warmest weather with ideal sea temperatures for swimming

AprilJuneJuly

Budget Travelers

Shoulder season with good weather and lower prices

AprilMayJune

Avoiding Crowds

Fewer tourists with acceptable weather conditions

MaySeptemberOctober

Photography

Best light conditions with clear skies

FebruaryMarchJanuary

Honeymoon

Perfect conditions for a romantic getaway

JanuaryFebruaryMarch

Koh Samui Weather FAQ: Your Questions Answered

What is the best time to visit Koh Samui?

Based on 30 years of weather data, the best months to visit Koh Samui are January, February, March. These months offer the optimal combination of pleasant temperatures (25°C avg) and low rainfall (22% chance).

When is the hottest time of year in Koh Samui?

July is historically the warmest month in Koh Samui with average highs of 28°C. If you prefer cooler weather, consider visiting in December when temperatures average around 25°C.

When is the rainy season in Koh Samui?

October typically sees the most rainfall in Koh Samui with a 67% chance of rain. For the driest conditions, plan your visit in February when rain probability drops to just 16%.

How accurate is the Koh Samui weather forecast?

Our Koh Samui climate analysis is based on 30 years of NASA POWER satellite observations (1995-2024), providing highly accurate historical averages. While weather can vary year to year, these long-term patterns are excellent indicators for planning your trip to Koh Samui.

What should I pack for Koh Samui?

Packing depends on when you visit. In July (warmest month), pack light summer clothes for 28°C weather. In December (coolest month), bring layers for 25°C temperatures. During October, pack rain gear as there's a 67% chance of rain.

Is Koh Samui good for a destination wedding?

Yes! The best months for an outdoor wedding in Koh Samui are February (only 16% rain chance) and January for optimal weather conditions. Avoid October when rain probability peaks at 67%.