Mae Nam Beach Weather in September

Mae Nam Beach in September sees high temperatures, with highs around 30°C (86°F) and overnight lows of 27°C (81°F). Rainfall is fairly high at around 166 mm (6.5 in) on average, so pack waterproofs just in case.

Rainfall in Mae Nam Beach in September

Typically, you can expect about 18 days of rain this month, with 166 mm (6.5 in) on average. This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.

Temperature in Mae Nam Beach in September

September in Mae Nam Beach brings typical temperatures with highs around 30°C (86°F) and lows of 27°C (81°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. With lows of 27°C (81°F), it stays warm throughout the night. A cold shower before going to sleep is one of the easiest ways to cool down before bed.

Sunshine in Mae Nam Beach in September

The month experiences a moderate amount of sunlight, with 145 hours of sunshine. This provides a nice balance between sunshine and clouds.

Average water temperature in September

With water at 29°C (84°F), conditions are warm and calm. Perfect for those who like tropical water temperatures, though it won't cool you down much.

If your ideal day consists of dry skies and pleasant temperatures, January and February typically offer the best circumstances for Mae Nam Beach.

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Check the conditions for any month of the year.

• January
• February
• March
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• May
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• October
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• December

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

Mae Nam 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 166 mm (6.5 in)  

Rainy days 18 days  

Humidity 79% *  

Sunshine 145 hours *  

Percentage Sunshine *  

* Data from: Koh Samui, Thailand (8 KM, 5 Miles).

Daily Historical Temperatures

48-year average (1976-2025)

Based on our historical records, temperatures in Mae Nam Beach typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 26°C (79°F).

Average temperatures in September

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Daily Historical Precipitation

48-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

‹ January February March April May June July August September October November December ›

Historical weather for Mae Nam Beach in September

Browse day-by-day weather records for Mae Nam Beach spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Mae Nam Beach historical weather extremes in September

Based on weather observations in Mae Nam Beach between 1986 and 2025, these are the recorded extremes during September.

• On September 13, 2005, temperatures climbed to 36°C (97°F), marking the warmest September day on record.
• The coldest September day was on September 18, 1995, with a maximum of 26°C (79°F).
• Mae Nam Beach registered its coldest September night on September 25, 2012, with temperatures dropping to 20°C (68°F).

What to Wear in Mae Nam Beach in September

Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. With water temperatures around 29°C (84°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Mae Nam 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 Mae Nam Beach's climate page.

More climate data for Mae Nam Beach

Temperature Rainfall Sunshine Humidity Water Temp

See the full Mae Nam Beach climate overview or explore weather in Thailand.