Best time to visit Ko Pha-Ngan

The best time to visit Ko Pha-Ngan for a beach holiday is during January and February.

However, anytime during the dry season from mid-December through to early-March is good, with daytime temperatures averaging 28°C (82°F).

---

Ko Pha-Ngan weather

Ko Pha-Ngan is a year-round destination, with a hot tropical climate and a short dry season.

Rain falls throughout the year in Ko Pha-Ngan, usually in late afternoon or early evening. The drier season lasts from mid-December into April.

What is the best month to visit Ko Pha-Ngan?
January, February and March are the best months to visit Ko Pha-Ngan – since these months see the least rainfall during the year.

Which is the hottest month in Ko Pha-Ngan?
May is the hottest month in Ko Pha-Ngan with an average maximum high of 33°C (91°F), with high heat and humidity, and a night-time low of 26°C (79°F).

The hot season in Ko Pha-Ngan lasts from April to early-July, with an average daily high temperature above 32°C (89°F).

What is the humidity in Ko Pha-Ngan?
Ko Pha-Ngan experiences little significant seasonal variation in perceived humidity, with approximate average relative humidity calculated at between 78% – 86% over the course of the year.

What do the humidity conditions feel like in Ko Pha-Ngan?
We derive the humidity comfort level – what conditions feel like – from the dew point temperature, which measures moisture content in the atmosphere: a higher dew point feels more humid, while a lower dew point feels drier.

Meteorologists agree that dew point temperature is a more consistant indication of 'absolute humidity' than relative humidity, which fluctuates with temperature. 

The average annual dew point in Ko Pha-Nganis 25°C (77°F), and varies over the course of the year from muggy at 24°C (75°F) to oppressive at 26°C (79°F).   

Typically, it's humid all year round – almost every day feels muggy.

Which is the coolest month in Ko Pha-Ngan?
The coldest month of the year in Ko Pha-Ngan is December, with an average low of 24°C (75°F) and high of 29°C (84°F).

The cool season lasts from November through January, with an average daily high temperature below 30°C (86°F).

When is it sunniest in Ko Pha-Ngan?
The sunniest time of year in Ko Pha-Ngan is normally March with 7.5 hours of sunshine every day – that's on average 62% of daylight hours.

When is the sea warmest in Ko Pha-Ngan?
The sea is usually at its warmest in Ko Pha-Ngan in May when the water temperature reaches 30°C (86°F), which is pleasant for swimming.

The sea in Ko Pha-Ngan is warm enough to swim all year-round.

Which month has the most rain in Ko Pha-Ngan?
November is the wettest month in Ko Pha-Ngan with 293mm (11.5) of rainfall on average, distributed across 18 days. October has the most number of rainy days: 20 days.

The wet season typically lasts from May to mid-December, with a greater than 39% chance of a given day being a wet day.

During this time you can expect frequent but brief heavy downpours interspersed with sunny skies. October and November receive the most rainfall.

The drier season lasts from mid-December through April. February has the fewest wet days in Ko Pha-Ngan.

Which is the windiest month in Ko Pha-Ngan?
The windiest month of the year in Ko Pha-Ngan is December, with an average hourly wind speed of 19 kilometres per hour (12 mph; 10 knots).

The windy part of the year lasts from November through January, with average wind speeds of more than 15 kilometres per hour (9 mph; 8 knots).

The less-windy time of year lasts from February through December. The calmest month of the year in Ko Pha-Ngan is April, with an average hourly wind speed of 12 kilometres per hour (7.5 mph; 6.5 knots).

The predominant average hourly wind direction varies throughout the year in Ko Pha-Ngan.

October to January also brings strong winds that can make the east side of Ko Pha-Ngan rough for swimming, while the island's west side is often buffeted by summer monsoons during July and August.

---

Ko Pha-Ngan Weather Averages

Holiday seasons

High season: November to April.

Low season: May to October brings less crowds, cheaper accommodation and, as the locals are quick to point out, it does not rain all day.

---

Source: Meteorological data for Ko Pha-Ngan is based on weather statistics gathered for the 10-year period 2012 to 2021 by the Thai Meteorological Department at the closest weather station: Koh Samui Airport, (USM), located about 20km (12mi) south of Ko Pha-Ngan. This station is deemed sufficiently nearby to be relied upon as the primary source for historical climate records, although weather conditions in Ko Pha-Ngan may vary slightly.

Advice on the best time to visit a particular destination is based on average local weather statistics, when the weather conditions are generally better than at other times of the year. We consider high and low temperatures, risk of rain (and thunderstorms, etc.), amount of sunshine and sea temperature. For general outdoor activities we favour clear, rainless days with a temperature range between 18°C (64°F) and 27°C (80°F); and for hot-weather activities we favour clear, rainless days with a temperature range between 24°C (75°F) and 32°C (89°F). Often, the best times to visit correspond to high season and therefore involve higher prices.

---

Latest update: Best time to visit Ko Pha-Ngan: 17 May, 2024

---

Disclaimer: The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data and conditions at any given location and time are unpredictable and variable. We assume no responsibility and can not be held legally responsible for any decisions made on the basis of the information presented on this site.

---

---