September is a popular month to ask about Karon Beach because conditions can shift week to week along this coast. Expect the water near 29,0°C, with daily variation from wind, tides and recent storms. We refresh the live value from Open-Meteo Marine every hour, so the headline above always reflects the current state of the Andaman Sea.
Karon Beach sea temperature in September — averages 29,0°C
The sea at Karon Beach in Thailand averages 29,0°C during September, based on long-run climatology for the Andaman Sea. Use the live reading below for today's actual water and the monthly grid to compare with the rest of the year.
Average sea · September
29,0°C
tropical · Excellent
Live water now
…
Recommended wetsuit
No wetsuit
At 29.0°C the water is warm enough to swim and surf in just a swimsuit or boardshorts.
Monthly comparison
Yes — ideal swimming weather · Karon Beach
Can you swim at Karon Beach in July? — 29,0°C water29,0°CCan you swim at Karon Beach in August? — 29,0°C water29,0°CCan you swim at Karon Beach in September? — 29,0°C water29,0°CCan you swim at Karon Beach in October? — 29,0°C water29,0°CCan you swim at Karon Beach in November? — 28,0°C water28,0°CCan you swim at Karon Beach in December? — 27,0°C water27,0°C
Frequently asked questions
What is the average sea temperature at Karon Beach in September?
Karon Beach averages 29,0°C in September, based on long-run climatology for the Andaman Sea.
Is the sea warm enough to swim at Karon Beach in September?
Yes, most swimmers find 29,0°C comfortable for unrestricted swimming.
Do I need a wetsuit at Karon Beach in September?
No wetsuit needed.