Thong Son Beach Weather & Climate: Best Time to Visit

Average temperatures, rainfall, sunshine and the best time to visit Thong Son Beach.

Climate overview of Thong Son Beach

Thong Son Beach, Thailand, enjoys a steady climate throughout the year, with daytime temperatures typically around 30°C (86°F). May is the warmest month at 31°C (88°F), while January is the coolest at 29°C (84°F).

Rainfall is high, totalling around 1726 mm (68 in) per year. October is the wettest month and February the driest. The city also experiences a distinct rainy season from September to November. Sunshine peaks in March, when the city sees around 8.0 hours of sunshine per day.

Thong Son Beach Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Thong Son Beach - and find the best time to visit.

Monthly Temperature in Thong Son Beach

The temperature in Thong Son Beach remains steady throughout the year, providing a consistently very warm climate. Average maximum daytime temperatures range from a very warm 31°C (88°F) in May, the warmest time of the year, to a comfortable 29°C (84°F) during cooler months like January.

At night, you can expect temperatures ranging from 28°C (82°F) in May to around 26°C (79°F) during January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Rainfall in Thong Son Beach

Thong Son Beach has a relatively rainy climate with high precipitation levels, averaging 1726 mm (68 in) of rainfall annually. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, October it receives heavy rainfall, averaging 308 mm (12 in) of precipitation, recorded across 20 rainy days. In contrast, the driest month February brings less rainfall, with 45 mm (1.8 in) over 5 rainy days. For more details, please visit our Thong Son Beach Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

Sunshine Hours in Thong Son Beach

Seasonal changes in sunshine hours are quite dramatic in Thong Son Beach. While March receives considerable daily sunshine with up to 8.0 hours, September marks the darkest time of the year, where sunshine is scarce with only 4.8 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Data from: Koh Samui, Thailand (16 KM, 10 Miles).

Daily hours of sunshine

Data from: Koh Samui, Thailand (16 KM, 10 Miles).

Water Temperature in Thong Son Beach

The mean water temperature over the year ranges from 27°C (81°F) in January to 30°C (86°F) in April.

Water temperature over the year

Data from: Koh Samui, Thailand (16 KM, 10 Miles).

Humidity in Thong Son Beach by Month

Best Time to Visit Thong Son Beach

Conditions in Thong Son Beach are generally most comfortable in January and February. They are typically least comfortable in October and November.

Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.

  • Best overall: January and February
  • Warmest weather: March, April, May, June, July, August, September and October
  • Most sunshine: March
  • Fewest rainy days: February and March
  • Best for swimming: Any time of year. The sea stays pleasantly warm year-round.
  • Wettest months: September, October, November and December, when rainfall is highest.
  • Seasonal pattern: A distinct rainy season from September to November

Frequently asked questions about the climate in Thong Son Beach

What is the best time to visit Thong Son Beach?

January and February typically offer the most optimal weather in Thong Son Beach. In contrast, October and November tend to have less optimal conditions. Thong Son Beach has a distinct rainy season from September to November.

What temperatures can I expect in Thong Son Beach?

Daytime highs range from 29°C (84°F) in January to 31°C (88°F) in May. Nighttime lows range from 26°C (79°F) to 28°C (82°F). Temperatures stay relatively stable year-round.

How much rain does Thong Son Beach get?

Annual rainfall is around 1726 mm (68 in). October is the wettest month with 308 mm (12 in), while February is the driest with 45 mm (1.8 in).

How sunny is Thong Son Beach?

Thong Son Beach receives around 2,151 hours of sunshine per year. March is the sunniest month with 240 hours, while September is the cloudiest with just 145 hours. Overall, Thong Son Beach enjoys abundant sunshine.

Thong Son Beach 3-Day Forecast

Thong Son Beach on the map

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