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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.
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).
Mae Nam Beach Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Mae Nam Beach - and find the best time to visit.
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
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
Historical weather records 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.
Mae Nam Beach historical weather extremes in September
Based on weather observations in Mae Nam Beach between 1986 and 2026, these are the recorded extremes during September.
- On September 6, 2026, 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).
Best Places in Thailand in September
Find out more about the weather in Thailand and which places have the best travel conditions in this month. See all of Thailand in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
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.
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Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Mae Nam Beach 3-Day Forecast
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.
Popular in September
Where to go in September - average daytime high across popular destinations.
Bangkok
34°C (93°F) Chiang Mai33°C (91°F) Jomtien Beach32°C (90°F) Hua Hin32°C (90°F) Ao Nang Beach30°C (86°F) Koh Samui30°C (86°F) Ko Lanta30°C (86°F) Patong Beach29°C (84°F) Bucket list
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