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✓ Updated February 2026

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When is the Best Time to Visit Koh Samui, Thailand?

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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.

See all 8 things to do →

💡 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

Jan
5 days
Feb
3 days
Mar
4 days
Apr
8 days
May
14 days
Jun
12 days
Jul
14 days
Aug
15 days
Sep
16 days
Oct
15 days
Nov
12 days
Dec
7 days

Monthly Weather Data Table

MonthHigh (°C)Low (°C)High (°F)Low (°F)Rainfall (mm)Rain DaysDaylight (h)
Jan30°C24°C86°F75°F50mm
5 days
11.8h
Feb31°C25°C88°F77°F30mm
3 days
11.9h
Mar32°C26°C90°F79°F50mm
4 days
12.1h
Apr32°C26°C90°F79°F100mm
8 days
12.3h
May31°C26°C88°F79°F200mm
14 days
12.4h
Jun31°C25°C88°F77°F150mm
12 days
12.4h
Jul30°C25°C86°F77°F180mm
14 days
12.3h
Aug30°C25°C86°F77°F200mm
15 days
12.1h
Sep30°C25°C86°F77°F240mm
16 days
11.9h
Oct30°C24°C86°F75°F220mm
15 days
11.7h
Nov30°C24°C86°F75°F180mm
12 days
11.6h
Dec30°C24°C86°F75°F70mm
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

Quick Tip: Jan offers a quieter experience with fewer tourists.

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

Quick Tip: Feb can be quite hot. Stay hydrated and plan indoor activities.

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

Quick Tip: Mar can be quite hot. Stay hydrated and plan indoor activities.

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

Quick Tip: Apr can be quite hot. Stay hydrated and plan indoor activities.

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

Quick Tip: May can be quite hot. Stay hydrated and plan indoor activities.

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

Quick Tip: Jun can be quite hot. Stay hydrated and plan indoor activities.

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

Quick Tip: Jul sees significant rainfall. Bring waterproof gear.

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

Quick Tip: Aug sees significant rainfall. Bring waterproof gear.

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

Quick Tip: Sep sees significant rainfall. Bring waterproof gear.

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

Quick Tip: Oct sees significant rainfall. Bring waterproof gear.

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

Quick Tip: Nov sees significant rainfall. Bring waterproof gear.

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

Quick Tip: Dec offers a quieter experience with fewer tourists.

All Things to Do in Koh Samui, Thailand

Sunrise Serenity at Wat Plai Laem

cultural

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

nature

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.

Best time: June-October

Culinary Quest at Bophut's Fisherman's Village Walking Street

food

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

activity

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.

Sunset Cocktails with a Local Twist at a Beach Bar

nightlife

Skip 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

shopping

Venture 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

nature

For 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

activity

Learn 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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GoWithGuide Tours and Experiences

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.

Cost:20-100 THB depending on distance.
Tip:To signal a songthaew, wave your hand as you would a regular taxi. When you want to get off, press the buzzer or tell the driver. Agree on the price *before* you get in, especially if you're going off the main routes or at night. Don't expect them to be air-conditioned; it's part of the authentic experience!

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.

Cost:200-300 THB per day, with weekly discounts available.
Tip:Always wear a helmet – it's the law and crucial for safety. Ensure your rental agreement covers insurance and check the scooter thoroughly for any existing damage before you leave the shop, taking photos as proof. Many tourists underestimate the island's hills and traffic; drive defensively and be aware of your surroundings. You'll need an international driving permit with a motorcycle endorsement.

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.

Cost:Metered taxis start around 50 THB, with longer trips costing 300-600+ THB. Grab prices vary but are often competitive.
Tip:Insist on using the meter for taxis if possible, though many drivers will try to negotiate a flat rate. If using Grab, confirm the driver and car details match before getting in. Be aware that some taxi drivers may refuse to use the meter or the app, especially in popular areas; have a backup plan or be prepared to negotiate.

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.

Cost:Starting from 800-1500+ THB per day, depending on the vehicle type and rental duration.
Tip:Driving is on the left side of the road in Thailand. Roads can be narrow and winding, with unexpected potholes and local traffic. Always have your passport and driving license (international permit recommended) with you. Many rental companies require a cash deposit.

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.

Cost:Around 200-400 THB per person for a one-way ticket.
Tip:Book your ferry tickets in advance, especially during peak season, through the ferry company websites or local travel agents. Allow ample time to get to the ferry terminal, as traffic can be unpredictable. Some tickets include bus transfers from mainland airports or train stations to the ferry pier.

💡 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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