Phuket, THAILAND and its best beaches
Climate - Temperatures and rainfall - Andaman Sea
Phuket: Temperatures during the day, at night, rain and bathing conditions
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January Day temperature  88°F / 31°C |
Night temp.  74°F / 23°C |
Bathing temperature  88°F / 31°C |
Rain  036 mm |
Conditions   
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February Day temperature 90°F / 32°C |
Night temp. 74°F / 23°C |
Bathing temperature 88°F / 31°C |
Rain 030 mm |
Conditions
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March Day temperature 92°F / 33°C |
Night temp. 76°F / 24°C |
Bathing temperature 86°F / 30°C |
Rain 038 mm |
Conditions
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April Day temperature 92°F / 33°C |
Night temp. 77°F / 25°C |
Bathing temperature 85°F / 29°C |
Rain 163 mm |
Conditions 
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May Day temperature 88°F / 31°C |
Night temp. 77°F / 25°C |
Bathing temperature 85°F / 29°C |
Rain 348 mm |
Conditions 
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June Day temperature 88°F / 31°C |
Night temp. 79°F / 26°C |
Bathing temperature 86°F / 30°C |
Rain 213 mm |
Conditions
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July Day temperature 88°F / 31°C |
Night temp. 77°F / 25°C |
Bathing temperature 85°F / 29°C |
Rain 264 mm |
Conditions
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August Day temperature 86°F / 30°C |
Night temp. 79°F / 26°C |
Bathing temperature 85°F / 29°C |
Rain 262 mm |
Conditions
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September Day temperature 85°F / 29°C |
Night temp. 76°F / 24°C |
Bathing temperature 86°F / 30°C |
Rain 419 mm |
Conditions
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October Day temperature 86°F / 30°C |
Night temp. 76°F / 24°C |
Bathing temperature 88°F / 31°C |
Rain 305 mm |
Conditions
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November Day temperature 86°F / 30°C |
Night temp. 76°F / 24°C |
Bathing temperature 88°F / 31°C |
Rain 208 mm |
Conditions
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December Day temperature 88°F / 31°C |
Night temp. 74°F / 23°C |
Bathing temperature 86°F / 30°C |
Rain 051 mm |
Conditions
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Thailand : climate and when to go to Phuket
The climate in Phuket and Koh Samui is very pleasant throughout the year, with temperatures varying between 77°F at night and 93°F during the day.
There are three seasons, the hot season from February to May, the rainy season from the end of September to November, and the "cool" season from October to January.
From February to October it average 32 to 38 degrees, but from July to September there may be some showers, but only for a few hours. The rainy season is often summed up in some "refreshing" tropical rain showers followed by the return of the sun. The climate is tropical so very wet throughout the year, but Samui always remains refreshed with a pleasant sea breeze coming from the Gulf.
| January Pecfect |
February Pecfect |
March Pecfect |
April Risky |
May Avoid |
June Risky |
July Avoid |
August Avoid |
September Avoid |
October Avoid |
November Risky |
December Pecfect |
When to go? The hottest month for the beach, lazing around and swimming is February. Check the precipitations because showers are possible but the sun returns quickly, otherwise other periods are possible. The coolest month is August, if you can not stand the heat too much. The driest month of the year is February, if you do not like the rain at all.
Click on
Phuket -
Koh Samui to display its climate.
Graphs and temperature curves with average precipitation over the year
Precipitation, rainfall, cyclone: THAILAND
Temperatures of bathing water around Phuket
Landmarks
Perfect conditions to enjoy the beach.
Favorable conditions for enjoying the beach. Cloudy with sunny spells and thunderstorms. Very strong tropical or monsoon rains.
Months at risk of cyclones with alerts level 1 to 5. Nice swimming at more than 26°C / 79°F. Everything is perfect for traveling.No cyclone risk for this country
Andaman Sea
Climate September 2025
Phuket sunshine in summer and winter
The sun at its zenith, that means well perpendicular to the surface of the Earth, sending 100% of radiation and heat. Phuket receives in winter (january), 85% of sun power and 96% during summer time (july).
The average temperature and sunshine deviations between summer and winter are 11%. This small gap means that the temperature at sea does not really vary and that the sea remains warm enough in summer and winter. The air is also hot all year round without great thermal amplitude.
Average temperatures and rainfall for a stay in September
On the left, the averages observed every month of September on the Thailand beaches. The trends for next month are, slightly warmer daytime temperatures, a bathing water in Andaman Sea which takes a few degrees, less rainfall with nights as temperate as this month.
Sunset and sunrise times for THAILAND
Local time : September 2025, Thursday 18, 09:36 AM
Sunrise time : 06:18 am, point A
Sunset time : 6:22 pm, point B
Duration of daylight : 12:04 / 24:00
Jet lag : GMT+7
The average monthly UV index of THAILAND
What is the period of mosquitoes virulence over the year?
Weather forecast for Phuket
Here are the current 5-day forecasts for Phuket / Phuket. Temperatures are spaced 3 hours apart for each day. The summary of the state of the sky gives the trend of the week. The sea temperature at is a monthly average. In lagoons or seashores where the bathing water is shallow, you can add some degrees.
Friday
September 19, 2025
8 am
83.4°F
29°C
Light rain
Humidity 75%
Sea 86°F/30°C
Friday
September 19, 2025
11 am
82.2°F
28°C
Light rain
Humidity 80%
Sea 86°F/30°C
Friday
September 19, 2025
2 pm
81.1°F
28°C
Light rain
Humidity 83%
Sea 86°F/30°C
Friday
September 19, 2025
5 pm
81°F
28°C
Light rain
Humidity 83%
Sea 86°F/30°C
Friday
September 19, 2025
8 pm
81°F
28°C
Light rain
Humidity 82%
Sea 86°F/30°C
Friday
September 19, 2025
11 pm
81.3°F
28°C
Light rain
Humidity 82%
Sea 86°F/30°C
Saturday
September 20, 2025
8 am
84°F
29°C
Light rain
Humidity 75%
Sea 86°F/30°C
Saturday
September 20, 2025
11 am
83.8°F
29°C
Light rain
Humidity 74%
Sea 86°F/30°C
Saturday
September 20, 2025
2 pm
81.7°F
28°C
Light rain
Humidity 82%
Sea 86°F/30°C
Saturday
September 20, 2025
5 pm
81.3°F
28°C
Few clouds
Humidity 83%
Sea 86°F/30°C
Saturday
September 20, 2025
8 pm
81.1°F
28°C
Scattered clouds
Humidity 82%
Sea 86°F/30°C
Saturday
September 20, 2025
11 pm
80.7°F
28°C
Light rain
Humidity 83%
Sea 86°F/30°C
Sunday
September 21, 2025
8 am
84.8°F
30°C
Overcast clouds
Humidity 70%
Sea 86°F/30°C
Sunday
September 21, 2025
11 am
83.9°F
29°C
Broken clouds
Humidity 72%
Sea 86°F/30°C
Sunday
September 21, 2025
2 pm
81.7°F
28°C
Broken clouds
Humidity 80%
Sea 86°F/30°C
Sunday
September 21, 2025
5 pm
81.3°F
28°C
Broken clouds
Humidity 81%
Sea 86°F/30°C
Sunday
September 21, 2025
8 pm
80.5°F
27°C
Broken clouds
Humidity 81%
Sea 86°F/30°C
Sunday
September 21, 2025
11 pm
80.2°F
27°C
Broken clouds
Humidity 82%
Sea 86°F/30°C
Monday
September 22, 2025
8 am
84.7°F
30°C
Broken clouds
Humidity 69%
Sea 86°F/30°C
Monday
September 22, 2025
11 am
83.4°F
29°C
Overcast clouds
Humidity 71%
Sea 86°F/30°C
Monday
September 22, 2025
2 pm
81.2°F
28°C
Overcast clouds
Humidity 79%
Sea 86°F/30°C
Monday
September 22, 2025
5 pm
81.1°F
28°C
Scattered clouds
Humidity 80%
Sea 86°F/30°C
Monday
September 22, 2025
8 pm
80.5°F
27°C
Broken clouds
Humidity 81%
Sea 86°F/30°C
Monday
September 22, 2025
11 pm
80.4°F
27°C
Overcast clouds
Humidity 81%
Sea 86°F/30°C
Weather uncertainties 2025 to go to Phuket ?
When traveling in the tropics as a seaside, rain is not welcome. If you see this indicator, with possible storms, that does not mean that it will rain all day long. When we observe the local rainfall, it is either really zero or very weak. Meteorologists prefer to be pessimistic. So observe below, the skies photographed during a week announced stormy in Asia. It did not rain once. I invite you to integrate this parameter before going to Phuket for a good trip to the sun!
