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Koh Samui Island

Koh Samui Island 1
Travel Info
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Travel Info

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Koh Samui Island Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Koh Samui Island year round climate

  • Spring (March–May): Average 28.5–29.8°C, hot and dry climate with low rainfall. Common activities: Swimming, sunbathing, watersports. Recommended clothing: Light short sleeves, shorts, swimwear, sandals.
  • Summer (June–August): Average 28.9–29.7°C, hot and humid climate with occasional showers. Common activities: Swimming, diving, snorkeling, island exploration. Recommended clothing: Light and breathable clothing, short sleeves, shorts, sandals, and rain gear.
  • Autumn (September–November): Average 27.3–28.6°C, warm and humid climate with gradually increasing rainfall. Common activities: Visiting temples, enjoying Thai massage, tasting local cuisine. Recommended clothing: Light long sleeves or short sleeves, long pants or shorts, comfortable shoes.
  • Winter (December–February): Average 27.2–27.8°C, warm and humid climate with higher rainfall. Common activities: Swimming, sunbathing, watersports, but be mindful of sea conditions. Recommended clothing: Light long sleeves or short sleeves, long pants or shorts, comfortable shoes, and rain gear.

Koh Samui Island climatological average

Annual average temperature: approx. 28.5°C / Annual rainfall: approx. 2370 mm / Summer humidity: 70%–80% / Rainiest month: December

Koh Samui Island monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
27.4°C
186.9
February
27.8°C
120.5
March
28.5°C
59.4
April
29.6°C
31.3
May
29.8°C
136.7
June
29.7°C
110
July
28.9°C
218
August
29.3°C
113.9
September
28.6°C
162.2
October
27.9°C
326.4
November
27.3°C
445.1
December
27.2°C
460.5

Koh Samui Island weather for the next seven days

2/25
Wednesday
Partly Cloudy
27.6°C/26.9°C
2/26
Thursday
Sunny
27.7°C/26.8°C
2/27
Friday
Patchy rain nearby
28°C/26.5°C
2/28
Saturday
Patchy rain nearby
28°C/27°C
3/1
Sunday
Patchy rain nearby
28.1°C/27.1°C
3/2
Monday
Sunny
28°C/27.3°C
3/3
Tuesday
Partly Cloudy
28°C/27.1°C

Koh Samui Island Frequently Asked Questions and Useful Information for Travel

Why is Koh Samui Island so famous?

Koh Samui Island is renowned for its stunning sandy beaches, the charming Fisherman's Village, and its wonderfully relaxed atmosphere. Visitors can find a diverse range of accommodation options, including resorts, hotels, and guesthouses, particularly in areas like Bophut.

Is Koh Samui Island worth visiting in 2025?

Yes, Koh Samui Island is absolutely worth visiting for its abundant luxury, relaxation, and adventure opportunities. While it's a more developed and cosmopolitan destination with its own airport, making it convenient, it's generally more expensive than other Thai islands and might not be the best choice for those seeking a completely untouched or budget-friendly experience. It offers a wide array of activities, from serene beaches and luxury spas to vibrant nightlife in Chaweng and Lamai, and attractions like the Big Buddha Temple and the Secret Buddha Garden.

What are the key attractions on Koh Samui Island?

Koh Samui Island boasts several captivating attractions, including the iconic Big Buddha Temple (Wat Phra Yai), offering panoramic views. The Secret Buddha Garden provides a unique, tranquil escape with its stone sculptures. For a glimpse into local life and a charming shopping experience, the Fisherman's Village in Bophut is a must-visit, especially during its Friday night walking street market.

What is the best way to experience Koh Samui Island's beaches?

Koh Samui Island offers a variety of beaches to suit different preferences. For a lively atmosphere with plenty of dining and nightlife, Chaweng Beach is popular. For a more relaxed and family-friendly vibe, Lamai Beach is a great choice. If you seek tranquility and charming beachfront restaurants, Bophut Beach and its adjacent Fisherman's Village are ideal. For a more secluded and picturesque experience, head to Maenam Beach.

How does Koh Samui Island compare to other Thai islands for a holiday?

Koh Samui Island offers a blend of developed convenience and tropical beauty, making it a great choice for travelers seeking comfort and a wide range of activities. Unlike more remote islands, its accessibility via its own airport and well-established infrastructure cater to diverse travelers, from luxury seekers to families. While islands like Koh Lipe are famed for their Maldivian-like pristine beauty and Koh Phi Phi for dramatic landscapes, Koh Samui provides a more comprehensive island experience with a strong focus on hospitality and diverse entertainment options, though often at a higher price point.