Phuket is the same temperature every month of the year. Rain, the sea and the crowds are what decide your dates.
The best time to visit Phuket is November to February. These are the dry months: rain falls on four to fifteen days, humidity eases from 80% in November to the low 70s by February, and the sea on the west-coast beaches is calm enough to swim. February is the driest month of the year, with rain on about four days.
December is the busiest month by a clear margin, and November is close behind. Both give you good weather at the highest prices of the year. January is nearly as dry as February and a step down in cost from the Christmas and New Year peak.
March deserves more attention than it gets. It scores the same as November on the month chart above, it still gets only about six days of rain, and it draws the fewest visitors of any month in the arrivals data. That combination does not repeat anywhere else in the year. The catch is air quality, which is at its worst in February and March, when smoke drifts down from farm burning further north.
The southwest monsoon runs from May to October. September and October are the wettest months, at about 22 rainy days each, and that is when the west-coast beaches get their strongest currents.
Not the best time to visitMonsoon season
September brings frequent rain showers and high humidity. Expect the monsoon season to be active, so pack accordingly and be aware of potential disruptions.
SCORE BY MONTH
Visitor data: Thailand Ministry of Tourism and Sports, monthly guest arrivals, Thai and foreign (2024-2025 average)
The temperature in Phuket is much the same all year. What changes is the rain, the state of the sea, how busy the island gets, and what it costs to fly in.
Calm water on the west-coast beaches, and the humidity is low for Phuket. High season prices, though still below the December peak.
The calmest sea and the lowest humidity of the year. Air quality is at its worst, as smoke from the northern burning season reaches this far south.
The lowest arrivals of any month, though on Phuket that still means a fairly busy island. Good value if the haze does not bother you.
The last dry month before the monsoon, and the most humid of them. Songkran, the Thai New Year, falls mid-month and fills the island.
The monsoon arrives and the Similan Islands close for the season. Rates drop sharply once it does.
Rain comes in heavy bursts rather than all day, so a wet month still gives you dry hours. One of the cheapest months to stay.
European school holidays start, so the beaches are busier than the forecast would suggest.
Still one of the busier months of the year despite the monsoon. Air quality is the cleanest it gets.
High humidity, and the water on the west coast is rough enough that swimming is often a bad idea. Boat trips get canceled.
As wet as September, and the cheapest month of the year to stay. The monsoon eases towards the end of it and the Similans reopen.
The dry season returns. Visitor numbers climb fast, so book ahead if your dates are fixed.
The busiest month of the year. Christmas and New Year are the most expensive week Phuket has.
Airfare here differs by season, and not always in step with the weather. These are the cheapest fares held on Phuket's busiest nonstop routes, each measured against its own typical month.
Measured on Abu Dhabi, Bangkok, Ko Samui, New Delhi, Shanghai, Singapore to Phuket: two domestic routes, the busiest international one, and the long-haul routes that carry the most traffic. Each route is compared against its own typical month, so a long flight and a short one count equally and what is left is the season. Cheapest fares only, and airfare only, not the cost of the trip.
May to October, and the rest of the year is the dry season. Phuket sits on the Andaman coast, which catches the southwest monsoon head on. Rainy days go from four in February to twenty-two in September and October, and the humidity climbs with them.
The rain itself is rarely the problem. It usually arrives as a heavy afternoon burst and clears. What the monsoon really changes is the sea. Phuket's best-known beaches all face west, which is the direction the monsoon comes from, and the surf and rip currents there get genuinely dangerous. Red flags go up, and people drown on this coast every monsoon season.
Boat trips are the other thing the monsoon affects. Crossings to Phi Phi and the surrounding islands can be rough or canceled outright when the sea is up, and the Similan Islands are closed from the middle of May until the middle of October, when the national park shuts for its annual season.
The Gulf coast runs on the opposite schedule, which is worth knowing if you are combining islands. When Phuket is in its monsoon, Koh Samui has its better weather at that time of year, and the two swap around October and November. Our best time to visit Thailand guide sets the two coasts side by side month by month.
December, then November. Arrival figures from Thailand's tourism ministry put December at the top of the year, with November not far behind, and the last two weeks of December are the most expensive of all.
August is busier than you would expect from the weather. It is one of the busier months of the year despite sitting in the middle of the monsoon, because most of Europe takes its summer holiday then and families with school-age children book those weeks whatever the forecast says. If you want a wet month with the beach to yourself, pick a different one.
March has the lowest arrivals of the year, and it still only gets about six days of rain. Be clear about what low season means here, though: the quietest month still runs at about four-fifths of the December peak. Phuket does not empty out, it just gets less crowded. April is busier than it looks for its own reason, which is Songkran, the Thai New Year water festival in the middle of the month.
September and October, if you are coming for the sea. They are the two wettest months, humidity sits at 83%, the west-coast beaches are under red flags a lot of the time, and the island boat trips most people book are the first thing to be canceled.
For value rather than weather, the last two weeks of December. You pay the highest rates of the year for weather that January delivers almost as well for less.
Air quality is the thing most people never think to check, and it runs opposite to the weather. The dry months are the smoky ones: readings are worst in February and March, when smoke from agricultural burning in northern Thailand and the wider region drifts south. Phuket gets a much milder version of what Chiang Mai gets, but it is the trade-off that comes with the driest, clearest months. July and August have the cleanest air of the year.
In the dry season, barely. In the monsoon it decides whether you can get in the water.
The west coast, which is Patong, Karon, Kata and the beaches north of them, is where almost everyone stays and where the sunsets are. It faces the monsoon directly, so it has the best swimming from November to April and the worst of it from May to October.
The east and south coasts, around Rawai, Cape Panwa and Chalong, are sheltered. The beaches are not as good, but the water stays calmer through the monsoon and this is where the dive boats and most island departures leave from.
Island trips follow the sea, not the island you are staying on. Phi Phi, James Bond Island and the Similans are all weather-dependent between May and October, and the Similans close entirely for the season.
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February. It is the driest month of the year at about four rainy days, the humidity is at its lowest, and the sea on the west-coast beaches is calm. January is nearly as dry and costs less than the Christmas peak.
May to October, driven by the southwest monsoon. September and October are the wettest, at around 22 rainy days each. November through April is the dry season.
May, June and October, the deepest months of the monsoon. Rates are at their lowest and you can book late. March is the better compromise: near dry-season weather, the fewest visitors of any month, and prices below the November to February peak.
Yes, if you are not set on swimming and island trips. Rain tends to come in short heavy bursts, the island is green, the air is at its cleanest, and prices are less than half of what December costs. Book the sheltered east side and treat boat trips as a maybe rather than a plan.
Not on the west-coast beaches when the flags are red. The rip currents at Patong, Karon and Kata are strong enough to drown competent swimmers, and they do, every year. Take the flags literally. The sheltered south and east coasts stay swimmable through most of the monsoon.
Koh Samui. Phuket is on the Andaman coast and August is in its monsoon; Samui is in the Gulf and runs on the opposite schedule, so August is one of its drier months. The pattern reverses around October and November.