When to come

Right now the marine parks are shut, so this is the quiet, green, cheap version of Khao Lak — inland trips and an empty coast. For the islands, come between mid-October and mid-May.

12°N Andaman coast · two seasons, not fourFacts checked 5 August 2026 · updated seasonally

The month-by-month table

MonthIslandsSea & weatherRates
JanOpenDriest and calmest. Flat water, long visibility.High — eases after New Year
FebOpenDry and calm. The most reliable month of the year.High
MarOpenStill dry, still calm. The heat starts to build.High
AprOpenHottest month. Sea calm, air heavy. Songkran mid-month.High until Songkran
MayOpenThe monsoon arrives. First squalls, sea turning over.Falls sharply mid-month
JunClosedRain in bursts rather than all day. Sea rough, surf up.Low
JulClosedWet and green. Busy with European school holidays regardless.Low, but firmer
AugClosedWet. Inland is at its greenest and fullest.Low, but firmer
Sep — current monthClosedHistorically the wettest month on this coast.Lowest of the year
OctOpenWet early, turning through the month. The coast wakes up.Low, rising late
NovOpenSeas settle, rain tails off. The season proper begins.Rising — good value early
DecOpenDry, calm and the busiest of the year.Peak over Christmas and New Year

The park column is generated from the same closure dates the rest of this site runs on, so it cannot drift out of step with the Similan and Surin pages. Everything else is a long-run pattern, not a forecast.

Months shown as open or closed at the midpoint. The season changes around 15 October and 15 May, so May and October are each split down the middle in practice.

The question that actually decides it

Most “best time to visit” pages rank months by rainfall. That is the wrong axis here. Khao Lak’s tourist economy exists because of two marine national parks, and those parks are closed for five months of the year. Whether they are open matters more than whether it rains.

If you are coming for the islands — Similan, Surin, liveaboard diving, snorkelling day trips — your window is mid-October to mid-May, and that is not negotiable. Book inside it.

If you are coming for the mainland — Khao Sok, Cheow Lan Lake, a quiet beach, a good hotel at half the price — the monsoon is genuinely a reasonable choice, and the rainforest is at its best in it.

What closes when the parks do

More than the boats. Khao Lak empties out in a way that Phuket does not, and a stretch of restaurants, bars, dive shops and tour desks simply shut from May to October — some for the whole five months. The strip at Bang Niang stays alive; the smaller places along the coast road often do not.

The beaches get dangerous, and this is the part that gets left out. Red flags go up along this coast in the monsoon because of rip currents, and people drown here every year. If a flag is flying, the sea is not a judgement call.

What keeps running: hotels, the Phuket airport transfer, Khao Sok, and most of the road-based day trips. Ferry connections thin out and some crossings pause.

Two dates worth knowing

Songkran, 13–15 April. Thai New Year, marked with a nationwide water fight. It is genuinely good fun and it is also the busiest travel period of the Thai year — roads are heavy, transport books out, and some businesses close for family time.

26 December. Khao Lak was the worst-hit place in Thailand in the 2004 Indian Ocean tsunami. Memorial services are held each year at Bang Niang and at Ban Nam Khem, and the anniversary falls in the middle of the busiest week of the season. Visitors are welcome; it is worth knowing what the day is.

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Where to stay

Find a place near here

We cover hotels along this coast — the Khao Lak beaches, Phuket and Krabi — plus a handful on Koh Samui, across in the Gulf. Start with hotels in Khao Lak, or browse every hotel we cover; prices and availability show on the partner's own site.

Or see every place to stay in Khao Lak on Klook

Questions

Common questions

What is the best month to visit Khao Lak?
February. The islands are open, the sea is calm, visibility is at its best, and the Christmas and New Year crowds have gone. January and March are close behind. If price matters more than the islands, late October and November give you an open park at shoulder rates.
What is the weather like in Khao Lak?
Hot all year, and split into two seasons rather than twelve. From November to April it is dry and calm — January and February are the driest and flattest, March and April the hottest. From mid-May to mid-October the southwest monsoon brings rain in heavy bursts with dry stretches around them, rather than continuous drizzle, and September is historically the wettest month on this coast. The bigger practical difference is not the rain but the sea, which turns rough enough to close the marine parks.
When is the rainy season in Khao Lak?
The southwest monsoon runs roughly mid-May to mid-October, which is the same window in which the Similan and Surin marine parks close. It is not five months of continuous rain — but the sea gets dangerous, red flags go up along this coast because of rip currents, and a stretch of restaurants, bars and dive shops shuts for the season.
Is Khao Lak worth visiting in the rainy season?
It depends entirely on why you are coming. The marine parks are shut from roughly 15 May to 15 October, so there are no Similan or Surin trips and no liveaboards. Khao Sok, Cheow Lan Lake, transfers and the hotels all run as normal, the coast is close to empty, and rates are the lowest of the year.
Does it rain all day in the monsoon?
Usually not. Rain on this coast tends to come in heavy bursts with dry stretches around them rather than as continuous drizzle. The bigger practical constraint is the sea: it is rough, and swimming is often unsafe.
When is Khao Lak most expensive?
Christmas through New Year, by a wide margin, with high season running roughly November to April. Rates drop sharply once the parks close in May and bottom out in September. Off-season rates along this coast are the lowest of the year. Compare what your dates cost — the search and the booking both happen on our booking partner's own site.

Planning the rest of the trip? Compare places to stay, or see what is open month by month.

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