During the week of 23 June 2025 - 29 June 2025, temperatures averaged at 28 °C (82 °F) during the day and dropped to 24 °C (75 °F) at night. The current temperatures are below the long-term average for Koh Phangan, with the daily and nighttime temperatures being 32 °C (90 °F) and 23 °C (73 °F), respectively. The average temperatures during different times of day (local time) were following: 7am 24 °C (75 °F), 10am 26 °C (79 °F), 1pm 27 °C (81 °F), 4pm 27 °C (81 °F), 7pm 26 °C (79 °F), 10pm 25 °C (77 °F).

During this week: 4 days without rain, 2 days with light rain and 1 day with moderate rain were observed. The total precipitation for the week in Koh Phangan was 12 mm (0.47 in), which is below the area's average of 22 mm (0.87 in). The average cloud coverage during the daytime (from dawn to dusk) was 86 %.

Average speed of wind was 6.4 m/s. The prevailing winds blew from the West. The air pressure varied between 1006 hpa and 1011 hpa. The air in Koh Phangan had an average humidity of 78 %.

During the daytime (from dawn to dusk), there were in average: 1 hour clear skies, 2 hours partially overcast skies, 10.5 hours overcast skies and 0.5 hours rainy weather. At 06:01, on average, the sun rose, and at 18:43, the sun set.

Weather overview

Koh Phangan (Thailand) in general has a tropical climate. Temperatures during the day are in the range from 30 °C (86 °F) in December to 34 °C (94 °F) in April. The highest sea temperatures in Koh Phangan are in May with 30 °C (86 °F) and the lowest in January with 28 °C (82 °F). The highest night temperatures could be experienced in April with 24 °C (75 °F), the lowest in February with 22 °C (72 °F). The driest month is February with just 5 days of rain, on the contrary, the month when it rains the most is October with 22 days of rain.

January weather

The tourist season is taking place in January in Koh Phangan. The sea temperature reaches its minimum, its value is 28 °C (82 °F), while the day temperature rise's start could be observed in this month. The number of rainy days descents similarly to the previous month, with its value of 10 days, and the rainfall amount descents similarly to the previous month too. The rise of the number of sun hours (without clouds) can be observed, the value of this measure is 7 hours.

February weather

The tourist season continues in Koh Phangan, and there is pending dry season too. The day temperature continues to rise, its value is 33 °C (91 °F), while the night temperature reaches its minimum in this month. The minimum of the rainfall amount is observable, with its value being 50 mm (1.96 in), and the minimum of the number of rainy days can be noticed too in this month.

March weather

The ongoing tourist season is noticeable in Koh Phangan. The rise of the day temperature can be observed, its value is 34 °C (93 °F), while the sea temperature rise's start could be observed, with its value being 29 °C (84 °F). The number of rainy days rise's start could be observed in this month. The night temperature rise's start could be observed. The maximum of the number of sun hours (without clouds) can be noticed, with its value of 8 hours.

April weather

The day temperature is on its maximum, the value of this measure is 34 °C (94 °F) in Koh Phangan, while the rise of the sea temperature can be observed, with its value of 30 °C (86 °F). The tourist season continues in April. The number of rainy days continues to rise, with its value being 8 days, while the rainfall amount starts to descent, with its value being 77 mm (3.04 in). The maximum of the night temperature can be noticed, with its value of 24 °C (75 °F).

May weather

The beginning of the descent of the day temperature could be noticed, the value of this measure is 33 °C (92 °F) in Koh Phangan, while the maximum of the sea temperature is observable, with its value being 30 °C (86 °F). The rainfall amount starts to rise, the value of this measure is 134 mm (5.29 in), while the number of rainy days continues to rise, the value of this measure is 18 days. The number of sun hours (without clouds) descents similarly to the previous month, its value is 6 hours.

June weather

The day temperature descents similarly to the previous month in Koh Phangan, while the night temperature descent's start could be observed. The rainfall amount starts to descent, with its value of 96 mm (3.79 in), and the number of rainy days starts to descent as well, with its value of 17 days. The number of sun hours (without clouds) continues to descent, its value is 6 hours. The humidity reaches its minimum in June.

July weather

The value of the sea temperature is 30 °C (85 °F) in July in Koh Phangan. The descent of the number of rainy days can be observed, the value of this measure is 16 days.

August weather

The day temperature starts to descent, its value is 32 °C (89 °F) in Koh Phangan. The number of rainy days starts to rise, the value of this measure is 17 days, and the beginning of the rise of the rainfall amount could be noticed too, with its value being 104 mm (4.11 in). The number of sun hours (without clouds) is on its minimum, the value of this measure is 6 hours.

September weather

The number of rainy days rises similarly to the previous month, its value is 18 days in Koh Phangan, and the rise of the rainfall amount can be observed as well, its value is 128 mm (5.06 in).

October weather

The number of rainy days is on its maximum, with its value being 22 days in Koh Phangan, while the rainfall amount continues to rise, the value of this measure is 269 mm (10.59 in). The wet season is about to start this month. The wind speed is on its minimum, its value is 1.

November weather

The day temperature starts to descent in this month in Koh Phangan. There is pending wet season. The beginning of the descent of the number of rainy days could be noticed, the value of this measure is 21 days, while the maximum of the rainfall amount can be noticed in November. The humidity is on its maximum, the value of this measure is 83 %.

December weather

The minimum of the day temperature can be noticed, the value of this measure is 30 °C (86 °F) in Koh Phangan, while the sea temperature descent's start could be observed, the value of this measure is 28 °C (82 °F). The descent of the number of rainy days can be observed, while the rainfall amount descent's start could be observed, with its value of 192 mm (7.56 in). The tourist season is about to start. The night temperature starts to descent, with its value of 22 °C (72 °F).

What is the sea temperature in January in Koh Phangan?

The sea will reach 28 °C (82 °F) in Koh Phangan in January. Seems like an ideal temperature for swimming, you can stay in the sea for a long time and enjoy it as well.

Is it hot in Koh Phangan in February?

Yes, it is hot in Koh Phangan in February, although the perception of heat can be subjective. Daytime temperatures rise to 33 °C (91 °F).

Is March a good month to visit Koh Phangan?

In Koh Phangan in March, there are ideal conditions for a vacation. The seawater temperature reaches ideal 29 °C (84 °F). At night, temperatures hover around a pleasant 23 °C (74 °F). There are only 6 days of rain in the whole month, so you can leave your umbrella at home. Some people will find 34 °C (93 °F) temperature high, while others will enjoy it.

Is there a wet season in Koh Phangan in April?

No, there is no wet season in Koh Phangan in April - you can expect 8 days of rain during the month.

How many sunny hours can I expect in June in Koh Phangan?

There is an average length of sunshine of 6 hours per day in June in Koh Phangan.

What is the air temperature in July in Koh Phangan at night?

The average night temperature in Koh Phangan in July is 23 °C (74 °F). A very pleasant temperature for long evening walks, fun over a drink outside, or doing sports in the morning. If possible, look for a hotel with air conditioning.

What temperature can I expect during the day in August in Koh Phangan?

In August in Koh Phangan, the average daily temperatures will be 32 °C (89 °F). The great temperature for lying by the sea or pool and sunbathing, everywhere else you will probably be a bit hot. Don't forget to drink during the day, in these temperatures you should hydrate yourself a lot.

What is the humidity in September in Koh Phangan?

Humidity in September in Koh Phangan is 78 %. This humidity is rather above average, but except for sensitive individuals, it should not be a problem.

How windy is it in Koh Phangan in October?

In Koh Phangan in October, there will be an average wind scale of 1. It is rather a milder or unnoticeable wind, therefore it will not bother you during your holiday.

Is there a dry season in November in Koh Phangan?

No, November is not a dry month in Koh Phangan, expect rain approximately 21 days in a month.

How many rainy days can I expect in Koh Phangan in December?

There are 14 days, which are rainy in December in Koh Phangan, that is, days with precipitation more than 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 3.2 days of the week, or in general - 45 % days.