Samui Wind Calendar
Month by Month, 2026

The wind on Samui does not disappear for half the year — it changes coast. This calendar shows where we ride each month, what the breeze usually does, and how to time your trip around it.

The Wind Year at a Glance

If you want the one-line version: December to April on the east coast at Lamai, May to October on the west coast at Nathon, and a light, rainy gap in October and November. The northeast monsoon powers the first half; the southwest monsoon powers the second. The school — lessons, rental, storage and the rest — moves between the two beaches so that we are always on the side of the island that faces the breeze.

For learners, the best stretch is January to March at Lamai, when the northeast wind is at its most dependable, typically 12–20 knots. Nathon in the summer months usually sees 10–18 knots, with more day-to-day variation and afternoons generally the better time to be on the water.

Month-by-Month Calendar

These are typical patterns, not promises. Every season has windy weeks and quiet ones, but the overall shape of the year is consistent.

Why the Wind Switches Coasts

Monsoons are large, seasonal shifts in the prevailing wind, driven by the difference in temperature between the Asian landmass and the surrounding seas. Around Samui this means a northeast flow for roughly the first third of the year and a southwest flow through the middle of it.

The island itself decides where that wind is usable. Samui has a hilly, forested centre. When the breeze comes from the northeast, the east coast — Lamai and Chaweng — faces it directly, while the west coast is in the lee of the hills. When it swings southwest, Nathon on the west coast is exposed and the east side goes quiet. Rather than wait out half the year, we follow the wind across the island.

Lamai, December to April

Lamai is a long sandy beach on the east coast, about 30 minutes from Samui Airport, with the Hin Ta and Hin Yai rocks at its southern end and the village right behind it. Water temperature sits around 27–30 °C, so no wetsuit is needed.

December: The Season Opens

The northeast wind returns and we set up at Lamai again. The first weeks can still bring showers left over from the wet season, and the wind is building rather than settled. Good for people who are already in Thailand and can pick their days.

January to March: The Core Months

This is the period to aim for if you are booking a first course and can only travel once. The wind is at its most consistent, the weather is mostly dry, and multi-day courses tend to run on schedule. It is also the busiest time on the island, so accommodation near Lamai and lesson slots fill earlier.

April: Winding Down

The wind gradually eases and moves round towards the east. There are still plenty of good sessions, but lighter days are more common, so keep your course days flexible and add one or two buffer days.

Nathon, May to October

From May we move to Nathon Beach, beside Nathon town and the main ferry pier on the west coast, about 40 minutes by car from the airport. The southwest monsoon typically gives 10–18 knots here. It is a real kite season, but a less predictable one than winter at Lamai.

Afternoon Sessions

Mornings are often lighter, and the breeze usually fills in later in the day, so many lessons are scheduled for the afternoon. Planning a relaxed morning — a market in Nathon, a swim, a coffee — and heading to the beach after lunch is a typical summer rhythm.

Who Does Well in Summer

Riders who already know the basics and can switch kite sizes, lighter people who get going in less wind, and wing foilers, since a wing is easier to use in moderate breeze. Beginners can absolutely learn at Nathon, but should allow more days than they would in February.

October–November: The Quiet Gap

Between the monsoons, roughly October and November, the wind is weak and shifts direction, and Samui gets its main rains — the wet season here runs roughly October to December, with November usually the wettest month. That is the opposite of Bangkok and the Andaman coast, and it catches out travellers who read general Thailand weather advice.

We do not recommend booking a kite course for these weeks. If you are on the island anyway, this is the time for:

• E-foil — no wind needed; a 30-minute intro costs 2,000 THB.
• SUP and kayak rental on calm days, from 400 THB and 500 THB per hour respectively.
• Kite sessions for experienced riders with their own gear when a windy spell turns up.

Rain, Squalls and Thunderstorms

Rain on its own does not stop a session; you are wet anyway. What matters is what comes with it. A dark squall line can bring a sudden jump in wind followed by a lull, and thunderstorms mean lightning. We stop or postpone any session when there is thunder or lightning around — kites, lines and open water are the wrong place to be in a storm.

Squalls are possible in any month, but they are more frequent in the transition months. In the core Lamai season, the typical pattern is long, sunny, breezy days.

Reading a Forecast Like a Local

Which Tools to Use

Windy and Windguru are the two apps most riders on the island use. Compare more than one model rather than trusting a single run. Local effects around the beaches can make the real wind a few knots different from what the app shows.

Direction Matters as Much as Speed

For Lamai you want a northeasterly component; for Nathon, a southwesterly one. A decent speed from the wrong direction can be gusty, offshore or blocked by the hills. If a forecast shows 15 knots but the arrow is pointing the wrong way, do not get your hopes up.

Watch the Gusts

A steady 14 knots is better for a lesson than a figure that swings between 8 and 22. Most apps show gusts separately — the smaller the gap between average and gust, the better the day.

Or Just Ask Us

We look at the forecasts every day and know how each beach behaves. Message us the evening before a lesson and we will confirm the time — or suggest moving it.

Matching Your Course to Your Dates

Longer courses are split across several sessions, so the season you choose matters more for them than for a single Discovery lesson.

• Discovery (5,000 THB, 2 h private or 3 h group) — fits almost any windy afternoon, in either season.
• Full Beginner (14,000 THB, 6 h private or 9 h group in three sessions) — ideal in January–March; allow a week in April or at Nathon.
• Independent (20,000 THB, 10 h private or 15 h group in five sessions) — best booked for the Lamai core months, with ten days or more on the island.

If your dates can move by a week or two, ask us before you buy flights. We will tell you honestly what the season usually looks like at that time, even when the answer is "come a bit later".

FAQ

Timing a Winter Trip to Lamai

If you are reading this in late 2026, the next Lamai season starts when the northeast wind settles in December. Travellers escaping a European or Russian winter often aim for late January through March. That window combines the most dependable wind with dry weather, which is why it is also the busiest.

Practical order of booking: fix your rough dates, message us to check the season outlook and course availability, then book accommodation within walking distance of Lamai, and only then buy flights to USM. Leave at least one spare day for every three lesson days, and plan something on land — Ang Thong Marine Park, the waterfalls at Na Muang, Fisherman's Village — for the calm ones.

If You Can Only Travel in Summer

School holidays and European summer breaks fall in the Nathon season. That is fine — plenty of people learn there — but go in with the right expectations. Book a slightly longer stay than you would in winter, keep afternoons free for sessions, and consider staying in Nathon or along the west coast so you can get to the beach quickly when the breeze arrives.

Wing foil is worth a look in summer: the Intro lesson is 4,000 THB for 2 hours and the wing handles moderate wind well. And on still days, the e-foil means nobody in the family is stuck on the beach.