Thong Son Beach Weather in September

Thinking of visiting Thong Son Beach in September? Expect high temperatures reaching 30°C (86°F) during the day, dropping to 27°C (81°F) at night. Heavy showers are common during the rainy season.

Rainfall in Thong Son Beach in September

As part of the rainy season, Thong Son Beach sees around 18 days of rain in September, with an average of 174 mm (6.9 in). Rain during the rainy season is significant rather than just light drizzle. Expect proper showers on most rainy days.

Temperature in Thong Son Beach in September

Expect highs of 30°C (86°F) in Thong Son Beach in September, with nights dropping to around 27°C (81°F). This kind of day-to-night contrast is typical for this time of year. Nights remain warm at around 27°C (81°F). For a more comfortable sleep, a cold shower before bed and a fan or air conditioning can make a big difference.

Sunshine in Thong Son Beach in September

The area enjoys a moderate level of sunlight, with around 145 hours. It's a good balance between sunny and rainy days.

Average water temperature in September

At 29°C (84°F), the water is very warm, more like a heated pool than the sea. Great for those who like warm water, though some may find it less refreshing on a hot day.

If you prefer enjoying temperate temperatures and rain-free days, January and February typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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For a detailed overview over the year and the best time to visit Thailand, check out our Thong Son Beach's climate page.

Thong Son Beach Temperature in September

Min Temperature 27°C (81°F)  

Max Temperature 30°C (86°F)  

Water Temperature 29°C (84°F) *  

Chance of Rain 58%  

Precipitation 174 mm (6.9 in)  

Rainy days 18 days  

Humidity 79% *  

Sunshine 145 hours *  

Percentage Sunshine *  

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

What to Wear in Thong Son Beach in September

Warm but pleasant conditions in Thong Son Beach in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. Expect water temperatures of around 29°C (84°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Thong Son Beach in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Cycling

7/10

Walking

7/10

Camping

7/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Thailand, check out our Thong Son Beach's climate page.

More climate data for Thong Son Beach

Temperature Rainfall Sunshine Humidity Water Temp

See the full Thong Son Beach climate overview or explore weather in Thailand.