Most people ask when Phuket is sunny. The better question is when the sea is calm, because that is what decides whether your beach days and island trips actually happen. The best time to visit Phuket is November to April, when the island averages 24–177 mm of rain a month and the Andaman Sea is flat enough to swim off almost any beach. February is the driest month of all.
May to October is the southwest monsoon: 213–361 mm of rain a month, rougher water on the west coast and the Similan Islands closed. It is also quieter and greener, and plenty of travellers prefer it. This guide gives you the month-by-month numbers from the Thai Meteorological Department, what each season means for swimming, island trips and prices, and the festivals worth timing a trip around.
At a Glance
- Best months: December to March: driest, calmest sea, busiest and most expensive
- Driest month: February, about 24 mm of rain (TMD 1981–2010 average)
- Wettest month: September, about 361 mm of rain
- Temperature: 31–34°C by day and 24–26°C at night, all year
- Monsoon: Southwest monsoon from May to October; Similan Islands closed 16 May to 14 October
- Good value: May, June and November: fewer people, lower rates, still plenty of dry days
In This Guide
- The Best Time to Visit Phuket, in Short
- Phuket’s Two Seasons
- Phuket Weather by Month
- The Rainy Season: Is It Worth It?
- Sea Conditions and Which Beaches to Pick
- Island Trips and National Park Closures
- Festivals Worth Planning Around
- Prices and Crowds Through the Year
- Where to Stay in Phuket in Any Season
- Frequently Asked Questions
- Sources
The Best Time to Visit Phuket, in Short
The best time to visit Phuket for beaches and island trips is December to March. Those four months get 24–73 mm of rain each, the sea on the west coast is usually calm and clear, and boat trips run on schedule. The trade-off is that December and January are the busiest and most expensive weeks of the year.
If you want good weather with fewer people, look at the shoulder months. November and April are mostly dry and noticeably quieter, though April is the hottest month and November can still bring a few heavy showers. If price matters more than sunshine, May to October costs less and still gives you warm sea and plenty of dry hours between storms.
Phuket’s Two Seasons
Phuket has two seasons that matter to a visitor: dry from November to April and wet from May to October. Thais also talk about a hot season from March to May, but on an island that stays between 31°C and 34°C by day all year, the rain and the sea make a far bigger difference than the temperature.
Dry season (November to April)
The northeast monsoon brings drier air from the mainland, and Phuket’s west-coast beaches sit in its shelter. Rainfall at the Thai Meteorological Department’s Phuket station averages 30 mm in January and 24 mm in February, and humidity drops to about 69%. This is when the famous photos of glassy turquoise bays are taken.
Wet season (May to October)
The southwest monsoon blows straight in from the Andaman Sea, which the Tourism Authority of Thailand (TAT) describes as running from May to October. It brings bigger waves, strong currents on the west coast, and rain that often arrives as heavy bursts rather than all-day drizzle. Humidity climbs to around 82% in October. The island turns very green and the crowds thin out.
Phuket Weather by Month
Phuket’s weather by month follows a clear curve: dry and calm from December to March, a hot April, a jump in rain in May, a peak in September and October, then a quick recovery in November. The table uses the Thai Meteorological Department’s 30-year averages (1981–2010) for its Phuket station near Phuket Town.
| Month | Avg high / low | Rain |
|---|---|---|
| January | 32.7 / 24.5°C | 30 mm |
| February | 33.6 / 24.9°C | 24 mm |
| March | 34.0 / 25.4°C | 73 mm |
| April | 33.9 / 25.8°C | 143 mm |
| May | 32.8 / 25.6°C | 260 mm |
| June | 32.4 / 25.5°C | 213 mm |
| July | 32.0 / 25.1°C | 258 mm |
| August | 32.0 / 25.3°C | 287 mm |
| September | 31.5 / 24.6°C | 361 mm |
| October | 31.5 / 24.5°C | 320 mm |
| November | 31.7 / 24.7°C | 177 mm |
| December | 31.7 / 24.4°C | 72 mm |
Rain varies across the island. The TMD station at Phuket Airport, 30 km further north, records more: about 399 mm in September and 208 mm in November. Treat the numbers as a guide to the pattern, not a forecast for your dates.
January
January is peak season in Phuket: 30 mm of rain, a calm sea and highs around 33°C. Expect full beaches in Patong and Kata and the year’s highest rates in the first week, after New Year.
February
February is Phuket’s driest month, with about 24 mm of rain and the lowest humidity of the year (around 69%). If you can only pick one month for beaches and boat trips, pick this one.
March
March stays dry (73 mm) and starts to get hot, with highs of 34°C. The high-season crowds begin to thin in the second half of the month, and the sea is still calm on the west coast.
April
April is the hottest month, with an average daily temperature of 29°C and highs near 34°C. Rain picks up to about 143 mm, mostly as late-afternoon storms. Songkran, the Thai New Year, falls on 13–15 April and turns the island into a water fight.
May
May is when the monsoon arrives and rain jumps to about 260 mm. The first weeks can still be bright, but the west-coast swell builds through the month, and the Similan Islands close on 16 May.
June
June averages 213 mm of rain, less than May, and many days mix sun and short storms. Rates drop and the beaches are quiet. Red flags are common on the west coast.
July
July brings about 258 mm of rain and steady surf on west-coast beaches like Kata, which is when Phuket’s small surf scene comes alive. Swimming on exposed beaches is often unsafe.
August
August averages 287 mm of rain and is one of the greyer months, yet Phuket is still far quieter than in the dry season.
September
September is Phuket’s wettest month, with about 361 mm of rain spread over many days. It is the cheapest time to stay and the hardest time to plan boat trips.
October
October is still wet (320 mm) but starts to turn by the end of the month. The Similan Islands reopen on 15 October, and the Phuket Vegetarian Festival usually falls in this month.
November
November is the transition: rain falls to about 177 mm, the northeast monsoon settles in and the sea calms down. Early November can still be showery, and conditions usually improve as the month goes on.
December
December is dry (72 mm) with a calm sea and highs around 32°C. It is the busiest and most expensive month, especially from Christmas to New Year, so book early.
The Rainy Season: Is It Worth It?
The rainy season is worth it if you want a quieter, cheaper Phuket and don’t need a swimming beach every day. Temperatures barely change (31–33°C by day from May to October), the island is at its greenest, and the sea stays warm wherever the flags allow a swim.
What you give up is reliability. TAT notes that island-hopping and tour boats still run from May to October but can be cancelled or delayed at the last minute when the weather turns, and that large waves and rip currents make swimming dangerous on exposed beaches. Build in a spare day for any trip you really want to do.
Rainy-season days that work well in Phuket:
- Phuket Old Town: cafés, museums and shophouses you can duck in and out of.
- The Big Buddha and Wat Chalong: two sights that don’t depend on the sea.
- A Thai cooking class or a massage while a storm passes.
- Beaches on the sheltered east side, or quiet bays in the south, when the west coast is flying red flags.
Sea Conditions and Which Beaches to Pick
Phuket’s west-coast beaches, including Patong, Kata, Karon, Surin and Bang Tao, face the Andaman Sea and take the full southwest swell from May to October. From November to April the same beaches are usually flat and clear. That single fact explains most of the difference between the seasons.
Always read the beach flags. TAT’s guidance is simple: a red flag means do not swim, a yellow flag means swimming is allowed but with caution, and a green flag means calm conditions. In the wet season, check with lifeguards or your host before going in, even on a sunny day, because rip currents are hard to see.
If you want a calmer swim in the monsoon months, bays tucked behind headlands usually fare better than long open beaches. Our Nai Harn Beach guide and Kata Beach guide cover how each one behaves through the year.
Island Trips and National Park Closures
Island trips are the part of a Phuket holiday most affected by the season. From November to April, day trips to Phi Phi, Phang Nga Bay and the Similan Islands run reliably. From May to October, boats still go to the closer islands but trips are more often cancelled, and the crossings can be rough.
Some national parks close completely. According to the Department of National Parks schedule published by TAT, Mu Ko Similan National Park and Mu Ko Surin National Park close every year from 16 May to 14 October. In 2023, Maya Bay in Hat Noppharat Thara–Mu Ko Phi Phi National Park also closed from 1 August to 30 September. These are the closure dates as of September 2026; they are reviewed each year, so check before you book.
For which islands to choose and how to get there, see our Phuket island hopping guide.
Festivals Worth Planning Around
Three events are worth planning a Phuket trip around, or avoiding, depending on your taste. Two fall outside the peak months, which makes them a good reason to visit in the shoulder season.
- Songkran (13–15 April): the Thai New Year water festival. In 2026 TAT listed Phuket events on 11–13 April at Patong Beach and Mai Khao, and on 13 April on Dibuk Road in Phuket Town. More in our Songkran guide.
- Phuket Vegetarian Festival (ninth lunar month, usually October): nine days of processions, shrine rituals and meat-free food. It ran 21–29 October in 2025; the dates move each year with the lunar calendar, so check TAT before you book.
- New Year’s Eve (31 December): fireworks and beach parties, and the most expensive night of the year to stay.
Prices and Crowds Through the Year
Phuket’s prices follow the weather. Rates for hotels, villas and boat trips are highest from mid-December to mid-January, stay high through February and March, and fall from May. September, the wettest month, is usually the cheapest time to stay.
The best value is in the shoulder months. Late April, May, June and November combine lower rates with a fair chance of dry weather, and the beaches are noticeably emptier. If you are travelling as a family or a group, the saving on a larger home for a week or two can be significant, so compare the same dates across a couple of months before you commit.
Where to Stay in Phuket in Any Season
This is where we at Silqhaus come into the picture. Silqhaus, a Phuket and Pattaya holiday-rental company, has private pool villas in Rawai and near Phuket Town, and apartments in Bang Tao, each run by our own local team. A home with its own pool and space to spread out is useful in any season: in the dry months it is your base between beaches, and on a rainy afternoon it is somewhere comfortable to wait out a storm.
Booking direct with Silqhaus is at least 10% cheaper than the same home on Airbnb, Booking.com or Vrbo, and you can message the local team from day one to ask about the weather, the sea or the best beach that week.
Frequently Asked Questions
What is the best month to visit Phuket?
February is the best month to visit Phuket for weather: it is the driest month, with about 24 mm of rain on Thai Meteorological Department averages, low humidity and a calm sea. December, January and March are almost as good.
When is the rainy season in Phuket?
Phuket’s rainy season runs from May to October, during the southwest monsoon. September is the wettest month, with about 361 mm of rain, and October is close behind at about 320 mm.
Is it worth going to Phuket in the rainy season?
Yes, if you want lower prices and fewer people and can be flexible. Many days mix sun and short storms, but west-coast swimming is often unsafe and boat trips can be cancelled at short notice.
What is the weather like in Phuket in December?
December in Phuket is dry and sunny, with about 72 mm of rain, highs around 32°C and a calm sea on the west coast. It is also the busiest month, especially from Christmas to New Year.
What is the weather like in Phuket in November?
November in Phuket is the change of season: rain falls from October’s 320 mm to about 177 mm, and the sea calms down as the northeast monsoon takes over.
Are the Similan Islands open all year?
No. Mu Ko Similan National Park closes every year from 16 May to 14 October for the monsoon season and reopens on 15 October.
There is no bad month to be in Phuket, only months that suit different trips. Come between December and March for the postcard version, April or November for the balance of good weather and space, and the wet season if you are happy to trade a few storms for quieter beaches and lower prices. Whenever you come, leave a spare day for the boat trip you care about most.
Sources
- Thai Meteorological Department: Thailand Climate Normal 1981–2010 (TMD open data, Phuket and Phuket Airport stations)
- Tourism Authority of Thailand: Marine tourism during the southwest monsoon season
- Tourism Authority of Thailand: Opening and closing status of Thailand’s national parks
- Tourism Authority of Thailand: Songkran Festival 2026
- Tourism Authority of Thailand: Thailand Vegetarian Festival 2025
