Climate and monthly weather forecast
Phuket, Thailand

Beautiful long tail boats on the white sandy shores of a beach in Phuket, Thailand
Beautiful long tail boats on the white sandy shores of a beach in Phuket, Thailand

The climate of Phuket

Phuket, Thailand falls under the tropical monsoon climate zone, according to the Köppen climate classification, due to its geographical position in close proximity to the equator. This classification, labeled as 'Am', indicates a weather system dominated by monsoon, characterized by high temperatures and heavy rainfall.

Covering the entire year, Phuket experiences virtually constant temperatures in both highs and lows. High temperatures fluctuate marginally from 31.5°C (88.7°F) during September and October, rising gradually to 34°C (93.2°F) in March. Low temperatures show a similar lack of variation, as they sway from 24.4°C (75.9°F) in December to 25.8°C (78.4°F) in April. Humidity levels also sustain a fairly equal range around the year, touching a lower limit at 69% in February, and a higher limit at 82% in both September and October.

Rainfall displays a contrasting pattern, varying considerably with two distinct phases in the year. The dry period sees a minimum of 24mm (0.94") in February and the intense monsoon season, starting in June and ending in November, receives the highest volume of rainfall, peaking at 361mm (14.21") in September. The count of rainfall days follows a corresponding pattern, with highest days in September i.e., 23 days and lowest in February i.e., 3 days.

Sunshine hours vary, with January and February seeing the most sunshine, averaging around 9.2 hours and 9.7 hours respectively, and reducing to the lowest at 4.7 hours in June. The UV Index retains a high range from 10 to 12 throughout the year. These parameters depict a typical tropical monsoon climate, marked by persistent warmth and high moisture, along with a sizeable rainfall during the monsoon.

The best time to visit Phuket

The most favorable time to visit Phuket holds a direct relation to the climate conditions. The prime time to visit would be from December to March, as this period experiences less rainfall, ranging between 30mm (1.18") to 74mm (2.91"). The temperature stays warm, hovering between 31.7°C (89.1°F) and 34°C (93.2°F) and lower temperature ranges from 24.4°C (75.9°F) to 25.4°C (77.7°F). Relative humidity levels are also lower compared to other months, with a range of 70% to 75%. Longer daylight durations add to the convenience, granting generous time for sightseeing and exploration.

The worst time to visit Phuket

Planning a visit during the monsoon season, from June to November, could obstruct outdoor activities. This period receives the heaviest rainfall, with rainfall days reaching a peak of 23 days in September. Relative humidity escalates, creating an oppressive environment with levels reaching as high as 82% during September and October. Moreover, daily sunshine hours drop to as low as 4.7 hours in June.

Spring weather in Phuket

Spring, spanning from March to May, sees a gradual rise in rainfall. March has 74mm (2.91") raining across five days, while May receives a significant rise with 260mm (10.24") across 21 days. Temperatures remain consistently high during this period, from 34°C (93.2°F) in March to 32.4°C (90.3°F) in May. The sea temperature is warm and inviting, elevating from 29°C (84.2°F) in March to 30°C (86°F) in May.

Summer weather in Phuket

Summers, encompassing June to August, witness the onset of monsoon, with heavy rainfall dominating the scene. Rainfall shoots up to 213mm (8.39") in June and further to 287mm (11.3") by August. Despite the heavy rainfall, temperatures maintain a steady course, oscillating between 32°C (89.6°F) and 32.4°C (90.3°F). The sea temperature remains constant at 29°C (84.2°F) in both June and August.

Autumn weather in Phuket

Autumn months include September to November, and this period sustains the heavy rainfall, with an impressive 361mm (14.21") in September, gradually falling to 177mm (6.97") in November. During this period, the high temperature variances reduce, setting a standard temperature of 31.5°C (88.7°F) for both September and October, and marginally rising to 31.7°C (89.1°F) in November. The sea temperature holds steady at 29°C (84.2°F) throughout this season.

Winter weather in Phuket

Winter, marking the months from December to February, ushers in a welcome decrease in rainfall. Starting from 72mm (2.83") in December, it further reduces to 24mm (0.94") in February. Temperatures continue to remain high, with a steadiness from 31.7°C (89.1°F) in December to 33.6°C (92.5°F) by February. The sea temperature falls from 29°C (84.2°F) in December to 28°C (82.4°F) in February, still making it comfortable for water-based activities.

Weather in January

Weather phenomena in Phuket, Thailand, begin the year favorably for holiday activities. Compared to December, January's climate shows an increase in temperatures with daytime peaks hitting a high of 32.7°C (90.9°F). This warming trend is accompanied by moderate humidity levels and a good amount of daily sunshine. Weather in January »

Weather in February

February continues the warm trend but with a notable rise in temperature to 33.6°C (92.5°F). The enhanced heat may not put a damper on touristic endeavors thanks to Phuket’s relatively lower humidity levels and longer daylight hours. Weather in February »

Weather in March

Weather in March portrays a distinctive shift in the climate of Phuket. As the heat intensifies with a rise to 34°C (93.2°F), there is an increase in rainfall to 74mm (2.91"). This period marks the onset of the wet season, which might hamper outdoor activities but leaves behind a more lush green landscape. Weather in March »

Weather in April

In April, Phuket endures its hottest month with temperatures scaling to 33.9°C (93°F). This increase coincides with a marked rise in the rainfall reaching 143mm (5.63"). The increase in precipitation levels contributes to a higher humidity index. Weather in April »

Weather in May

May’s weather in Phuket signals the arrival of monsoon season. Temperatures, still high at 32.8°C (91°F), become less of a focal point as precipitation escalates sharply reaching a whopping 260mm (10.24"). This heightened rainfall contributes to peak humidity levels. Weather in May »

Weather in June

In June, Phuket makes it past half the year with wetter conditions being more persistent. While temperatures remain relatively stable, the monsoon season is in full swing with rainfall consistent at 213mm (8.39"). Sunbathing might require careful planning due to fewer sunshine hours. Weather in June »

Weather in July

July retains the monsoon season momentum from June in Phuket. The main highlight is the high rainfall, consistent at 258mm (10.16"), despite constant temperatures. With fewer daylight and sunshine hours, tourists and locals alike must plan outdoor activities around erratic rain showers. Weather in July »

Weather in August

August brings with it the highest rainfall recorded in the year at 287mm (11.3"). Box jellyfish sightings are common, indicating caution for sea swims. Despite the increased rainfall, the temperatures stay constant, allowing for continuity in nature-driven activities. Weather in August »

Weather in September

September in Phuket comes with a climax in monsoon activity. The cold temperatures at night lower to 24.6°C (76.3°F), providing respite from the daily heat. However, the rainfall climbs even higher to 361mm (14.21") resulting in more rain-filled days. Weather in September »

Weather in October

As October unfurls, a noticeable dip in the wet conditions are evident with rainfall receding to 320mm (12.6"). Tourist-friendly weather starts to resurface as the sea conditions remain enjoyable even with reduced sunshine hours. Weather in October »

Weather in November

November marks the transition period from wet to dry in Phuket. The major shift can be seen in the decrease in rainfall to 177mm (6.97"), making outdoor activities more feasible. Lower temperatures ensue, but the warmth of the sea remains uninterrupted. Weather in November »

Weather in December

December in Phuket presents a full circle, taking steps into the dry season. The considerable reduction in rainfall to 72mm (2.83") inaugurates the onset of tourist season. However, temperatures stabilize, ensuring comfortable conditions for outdoor recreational activities. Weather in December »

Frequently asked questions

How much does it rain in Phuket?

In Phuket, Thailand, during the entire year, the rain falls for 170 days and collects up to 2220mm (87.4") of precipitation.

What are the months with the coldest sea water in Phuket?

The months with the coldest seawater in Phuket, Thailand, are January, February and December, with an average sea temperature of 28°C (82.4°F).

What is the least humid month in Phuket?

With an average relative humidity of 69%, February is the least humid month in Phuket, Thailand.

What is the driest month in Phuket?

The month with the least rainfall is February, when the rain falls for 3 days and typically collects 24mm (0.94") of precipitation.

What month has the most sunshine in Phuket?

The month with the most sunshine in Phuket is February, with an average of 9.7h of sunshine.

When is the highest UV index in Phuket?

The months with the highest UV index are February through October, with an average maximum UV index of 12.

What part of the year is the hottest in Phuket?

The average temperatures in Phuket reach their apex in March, averaging 34°C (93.2°F) at the high end and 25.4°C (77.7°F) at the low end.

When is the sea warmest in Phuket?

April through June, with an average sea temperature of 30°C (86°F), are months with the warmest seawater.

When are the longest days in Phuket?

June has the longest days of the year in Phuket, with an average of 12h and 36min of daylight.

What is the month with the least sunshine in Phuket?

The month with the least sunshine in Phuket is June, with an average of 4.7h of sunshine.

What are the coldest months in Phuket?

The yearly lowest temperatures occur in September and October, averaging a high-temperature of 31.5°C (88.7°F).

What are the most humid months in Phuket?

September and October, with an average relative humidity of 82%, are most humid months.

What is the wettest month in Phuket?

September is the month with the most rainfall. Rain falls for 23 days and accumulates 361mm (14.21") of precipitation.

What is the month with the shortest days in Phuket?

December has the shortest days of the year in Phuket, with an average of 11h and 42min of daylight.

Is there Daylight Saving Time (DST) in Phuket?

Phuket, Thailand, does not utilize Daylight Saving Time (DST). +07 timezone is used over the entire year.

What is the month with the lowest UV index in Phuket?

With an average maximum UV index of 10, December is the month with the lowest UV index in Phuket, Thailand.

Average temperature
Phuket, Thailand

Average temperature - Phuket, Thailand

The warmest month (with the highest average high temperature) is March (34°C).
The months with the lowest average high temperature are September and October (31.5°C).

The month with the highest average low temperature is April (25.8°C).
The coldest month (with the lowest average low temperature) is December (24.4°C).

Average humidity
Phuket, Thailand

Average humidity - Phuket, Thailand

The months with the highest relative humidity are September and October (82%).
The month with the lowest relative humidity is February (69%).

Average rainfall
Phuket, Thailand

Average rainfall - Phuket, Thailand

The wettest month (with the highest rainfall) is September (361.2mm).
The driest month (with the least rainfall) is February (23.9mm).

Average rainfall days
Phuket, Thailand

Average rainfall days - Phuket, Thailand

The month with the highest number of rainy days is September (23 days).
The month with the least rainy days is February (3 days).

Average sea temperature
Phuket, Thailand

Average sea temperature - Phuket, Thailand

The best months for swimming (with the highest average sea temperature) are April, May and June (30°C).
The coldest months (with the lowest average sea temperature) are January, February and December (28°C).

Average daylight / Average sunshine
Phuket, Thailand

Average daylight / Average sunshine - Phuket, Thailand

The month with the longest days is June (Average daylight: 12h and 36min).
The month with the shortest days is December (Average daylight: 11h and 42min).

The month with the most sunshine is February (Average sunshine: 9h and 42min).
The month with the least sunshine is June (Average sunshine: 4h and 42min).

Average UV index
Phuket, Thailand

Average UV index - Phuket, Thailand

The months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
The month with the lowest UV index is December (UV index 10).

Phuket, Thailand

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