✓ Updated February 2026
Weather data and travel information verified current
When is the Best Time to Visit Koh Samui, Thailand?
Quick Answer:
December to March is when Koh Samui truly shines, offering a delightful escape with comfortably warm days and a gentle, cooling breeze. Imagine waking to the soft glow of dawn, the air still carrying a hint of the night's coolness, before the sun climbs high to warm the pristine beaches. This period avoids the heaviest rains, allowing for sophisticated exploration of bustling night markets and the enjoyment of vibrant, golden sunsets painting the sky. The sea is often calm and inviting, perfect for a refreshing dip or a leisurely boat trip, making these months a truly refined choice for experiencing the island's allure.
Airport Code
USM
Coordinates
9.54°, 100.04°

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Top Things to Do
Sunrise Serenity at Wat Plai Laem
Escape the crowds and witness the vibrant colors of Wat Plai Laem at dawn. This active Buddhist temple, with its striking white Guanyin statue and cheerful Big Buddha, offers a peaceful start to the day. Arrive before 7 AM to enjoy the quiet beauty and perhaps share a moment with the resident cats.
Jungle Trek to Na Muang Waterfalls
Venture inland for a refreshing dip at the majestic Na Muang Waterfalls. Hike through lush jungle trails, listening to the symphony of tropical birds, to reach these stunning cascades. Pack a picnic and wear sturdy shoes; the lower falls are easily accessible, while the upper falls offer a more adventurous climb.
Culinary Quest at Bophut's Fisherman's Village Walking Street
Immerse yourself in a feast for the senses every Friday evening at Fisherman's Village. Sample an incredible array of local street food, from spicy som tum to grilled seafood, while browsing artisan crafts and enjoying live music. Go early to snag the best dishes before they sell out.
Kayaking Through Mangrove Forests of Laem Son National Park
Paddle through the serene, emerald waters of Koh Samui's northern coast, exploring the intricate network of mangrove forests. This hidden gem offers a chance to spot diverse birdlife and unique marine creatures in their natural habitat. Opt for a guided tour to learn about the delicate ecosystem.
💡 Travel Tip: For the best value on hotels during this season, check current rates on Trip.com.
💡 Travel Tip: If you're planning your trip, it's worth checking flight prices on Trip.com before you decide.
Weather Details
Monthly Weather Data Table
| Month | High (°C) | Low (°C) | High (°F) | Low (°F) | Rainfall (mm) | Rain Days | Daylight (h) |
|---|---|---|---|---|---|---|---|
| Jan | 30°C | 24°C | 86°F | 75°F | 50mm | 5 days | 11.8h |
| Feb | 31°C | 25°C | 88°F | 77°F | 30mm | 3 days | 11.9h |
| Mar | 32°C | 26°C | 90°F | 79°F | 50mm | 4 days | 12.1h |
| Apr | 32°C | 26°C | 90°F | 79°F | 100mm | 8 days | 12.3h |
| May | 31°C | 26°C | 88°F | 79°F | 200mm | 14 days | 12.4h |
| Jun | 31°C | 25°C | 88°F | 77°F | 150mm | 12 days | 12.4h |
| Jul | 30°C | 25°C | 86°F | 77°F | 180mm | 14 days | 12.3h |
| Aug | 30°C | 25°C | 86°F | 77°F | 200mm | 15 days | 12.1h |
| Sep | 30°C | 25°C | 86°F | 77°F | 240mm | 16 days | 11.9h |
| Oct | 30°C | 24°C | 86°F | 75°F | 220mm | 15 days | 11.7h |
| Nov | 30°C | 24°C | 86°F | 75°F | 180mm | 12 days | 11.6h |
| Dec | 30°C | 24°C | 86°F | 75°F | 70mm | 7 days | 11.6h |
Koh Samui, Thailand Month by Month: Complete Guide
Planning your trip to Koh Samui, Thailand? Here's what to expect each month:
Jan in Koh Samui, Thailand
Weather
30°C°C / 86°F°F
5 days rainy days • 50mmmm
What to Expect
Winter season with cooler temperatures. Fewer tourists but some attractions may have limited hours.
Crowd Level
🟢 Low - Quiet season, easy to find accommodation
Feb in Koh Samui, Thailand
Weather
31°C°C / 88°F°F
3 days rainy days • 30mmmm
What to Expect
Late winter, beginning to warm up. Good for budget travelers seeking lower prices.
Crowd Level
🟢 Low - Quiet season, easy to find accommodation
Mar in Koh Samui, Thailand
Weather
32°C°C / 90°F°F
4 days rainy days • 50mmmm
What to Expect
Spring begins, mild weather. Shoulder season with moderate crowds.
Crowd Level
🟢 Low - Quiet season, easy to find accommodation
Apr in Koh Samui, Thailand
Weather
32°C°C / 90°F°F
8 days rainy days • 100mmmm
What to Expect
Spring in full bloom. Pleasant temperatures and growing tourist activity.
Crowd Level
🟡 Moderate - Comfortable crowds, good availability
May in Koh Samui, Thailand
Weather
31°C°C / 88°F°F
14 days rainy days • 200mmmm
What to Expect
Late spring, excellent weather. One of the best times to visit for most travelers.
Crowd Level
🟡 Moderate - Comfortable crowds, good availability
Jun in Koh Samui, Thailand
Weather
31°C°C / 88°F°F
12 days rainy days • 150mmmm
What to Expect
Early summer, warm and sunny. Peak season begins, book accommodations early.
Crowd Level
🔴 High - Peak tourist season, book early
Jul in Koh Samui, Thailand
Weather
30°C°C / 86°F°F
14 days rainy days • 180mmmm
What to Expect
Peak summer season. Hot weather and highest tourist crowds. Most expensive time.
Crowd Level
🔴 High - Peak tourist season, book early
Aug in Koh Samui, Thailand
Weather
30°C°C / 86°F°F
15 days rainy days • 200mmmm
What to Expect
Peak summer continues. Very crowded but great weather for outdoor activities.
Crowd Level
🔴 High - Peak tourist season, book early
Sep in Koh Samui, Thailand
Weather
30°C°C / 86°F°F
16 days rainy days • 240mmmm
What to Expect
Early fall, shoulder season. Weather still good, crowds decreasing. Great value.
Crowd Level
🟡 Moderate - Comfortable crowds, good availability
Oct in Koh Samui, Thailand
Weather
30°C°C / 86°F°F
15 days rainy days • 220mmmm
What to Expect
Fall season, mild temperatures. Lower crowds and good prices. Comfortable for sightseeing.
Crowd Level
🟡 Moderate - Comfortable crowds, good availability
Nov in Koh Samui, Thailand
Weather
30°C°C / 86°F°F
12 days rainy days • 180mmmm
What to Expect
Late fall, cooler weather. Off-season begins, significant discounts available.
Crowd Level
🟢 Low - Quiet season, easy to find accommodation
Dec in Koh Samui, Thailand
Weather
30°C°C / 86°F°F
7 days rainy days • 70mmmm
What to Expect
Winter season, holiday atmosphere. Festive but can be cold. Mixed crowds.
Crowd Level
🔴 High - Peak tourist season, book early
All Things to Do in Koh Samui, Thailand
Sunrise Serenity at Wat Plai Laem
culturalEscape the crowds and witness the vibrant colors of Wat Plai Laem at dawn. This active Buddhist temple, with its striking white Guanyin statue and cheerful Big Buddha, offers a peaceful start to the day. Arrive before 7 AM to enjoy the quiet beauty and perhaps share a moment with the resident cats.
Jungle Trek to Na Muang Waterfalls
natureVenture inland for a refreshing dip at the majestic Na Muang Waterfalls. Hike through lush jungle trails, listening to the symphony of tropical birds, to reach these stunning cascades. Pack a picnic and wear sturdy shoes; the lower falls are easily accessible, while the upper falls offer a more adventurous climb.
Best time: June-October
Culinary Quest at Bophut's Fisherman's Village Walking Street
foodImmerse yourself in a feast for the senses every Friday evening at Fisherman's Village. Sample an incredible array of local street food, from spicy som tum to grilled seafood, while browsing artisan crafts and enjoying live music. Go early to snag the best dishes before they sell out.
Kayaking Through Mangrove Forests of Laem Son National Park
activityPaddle through the serene, emerald waters of Koh Samui's northern coast, exploring the intricate network of mangrove forests. This hidden gem offers a chance to spot diverse birdlife and unique marine creatures in their natural habitat. Opt for a guided tour to learn about the delicate ecosystem.
Sunset Cocktails with a Local Twist at a Beach Bar
nightlifeSkip the resort bars and find a more intimate spot along Maenam Beach for sunset. Order a refreshing Samui-inspired cocktail, perhaps featuring local rum or tropical fruits, and watch the sky ignite with color. Look for smaller, family-run bars for a more authentic vibe.
Discovering Local Crafts at Nathon Town Market
shoppingVenture beyond the tourist shops to Nathon Town, the island's administrative capital, and explore its bustling local market. Here you'll find authentic souvenirs, from hand-carved wooden items to fragrant spices and local textiles, often at better prices. Engage with the vendors; they often have fascinating stories.
The Secret Views from Khao Pom
natureFor the adventurous, a hike up Khao Pom offers unparalleled panoramic views of Koh Samui and the surrounding islands. This less-trafficked peak provides a challenging yet rewarding experience, especially during the cooler morning hours. Bring plenty of water and be prepared for a steep ascent.
A Taste of Authentic Thai Cooking
activityLearn the secrets of Thai cuisine by taking a cooking class in a local village setting, rather than a resort. Many classes include a visit to a fresh market to select ingredients, followed by hands-on preparation of classic dishes. It's a delicious way to connect with the island's culture.
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Getting Around Koh Samui, Thailand
Songthaews (Red Trucks)
These are the most common and budget-friendly way to get around Koh Samui. They operate like shared taxis on fixed routes, picking up and dropping off passengers along the main roads. They're perfect for short to medium distances between popular beach towns and villages.
Scooter/Motorbike Rental
Renting a scooter offers the ultimate freedom and flexibility to explore Koh Samui at your own pace, venturing into hidden coves and local markets. It's ideal for independent travelers who want to discover less accessible parts of the island.
Private Taxis & Ride-Hailing Apps
For comfort and convenience, especially with luggage or late at night, private taxis are readily available. While Grab (Southeast Asia's Uber equivalent) operates here, its availability can be spotty outside of major tourist hubs.
Car Rental
Renting a car provides the most comfort and space, especially for families or groups, and allows for extensive exploration of the island without the heat and exposure of a scooter. It's best for those planning to visit multiple, spread-out locations.
Ferry Services (to/from mainland)
When arriving or departing Koh Samui from the mainland (e.g., Surat Thani), ferries are the primary mode of transport. Companies like Lomprayah and Seatran offer regular services connecting to piers like Donsak.
💡 Travel Tip: This season usually means better deals — check what's available on Trip.com.
Similar Destinations
Frequently Asked Questions
When is the absolute best time to visit Koh Samui if I want to avoid the worst of the rain but still enjoy lush scenery?
For that sweet spot between sunshine and greenery, aim for late February to April. You'll catch the tail end of the dry season with plenty of sunshine, but the island will still be vibrant and beautiful from the recent rains. It's a fantastic time before the really intense heat and humidity of summer kicks in.
What's the deal with the 'rainy season' in Koh Samui? Is it a wash-out?
Koh Samui's rainy season, typically from October to December, can be a bit unpredictable. While you might get heavy downpours, they often come in short, intense bursts, usually in the afternoon or evening, leaving plenty of sunshine for exploring. Don't let it deter you entirely; you can often find great deals during this time, and the island feels wonderfully alive.
Beyond the main beaches, are there any quieter spots on Samui that are worth seeking out?
Absolutely! For a truly local vibe, head to the north coast and explore the fishing village of Bang Rak or the more laid-back Choeng Mon beach. You'll find fewer crowds, more authentic seafood restaurants, and a much more relaxed atmosphere than the busier hubs like Chaweng.
How should I get around Koh Samui? Is renting a scooter really the best option?
Renting a scooter is popular and offers the most freedom, but only if you're a confident and experienced rider. The roads can be chaotic, especially in peak season. For a safer bet, consider using the local songthaews (red pickup trucks that act as shared taxis) – they're incredibly affordable and a quintessential Samui experience once you get the hang of flagging them down.
Are there any specific cultural nuances I should be aware of as a visitor?
Respect is key here. Always dress modestly when visiting temples, covering your shoulders and knees – a simple sarong works wonders. It's also polite to avoid touching people on the head, as it's considered the most sacred part of the body, and always use your right hand for giving and receiving things.
What's a must-try local dish or food experience that isn't just Pad Thai?
You absolutely have to try Gaeng Som Pla (sour fish curry) – it's a vibrant, spicy, and tangy dish that's a Samui specialty. Also, seek out a local market, like the Fisherman's Village Walking Street Market on Fridays, for incredible street food where you can sample everything from grilled seafood to sweet mango sticky rice.
What is the cheapest month to visit Koh Samui, Thailand?
The cheapest months to visit Koh Samui, Thailand are typically May and Jul during the off-season. You can save 30-40% on hotels and flights compared to peak summer months. While weather may not be ideal, you'll enjoy fewer crowds and significant savings.
How many days do you need in Koh Samui, Thailand?
We recommend spending 3-5 days in Koh Samui, Thailand to see the main attractions without feeling rushed. This gives you time to explore the top sights, experience local culture, and take a day trip if desired. Budget travelers might do 2-3 days, while those wanting a deeper experience should plan for a week.
What should I avoid in Koh Samui, Thailand?
Avoid visiting Koh Samui, Thailand during May if possible, when weather conditions are less favorable. Also, be cautious of tourist traps in heavily visited areas - research attractions beforehand and consider booking skip-the-line tickets for popular sites.
Is Koh Samui, Thailand expensive to visit?
Koh Samui, Thailand can be enjoyed on various budgets. Daily costs typically range from $50-80 for budget travelers, $100-200 for mid-range visitors, and $250+ for luxury experiences. Prices are highest during peak season and lowest during off-season months. Book accommodations early to secure better rates.
What is Koh Samui, Thailand famous for?
Koh Samui, Thailand is famous for its unique attractions, rich culture, and memorable experiences. The destination is best known for its architectural landmarks, local cuisine, and vibrant atmosphere. Visit during for the best experience.
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