September is a popular month to ask about Nilaveli Beach because conditions can shift week to week along this coast. Expect the water near 21.0°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 Indian Ocean.
Nilaveli Beach sea temperature in September — averages 21.0°C
The sea at Nilaveli Beach in Sri Lanka averages 21.0°C during September, based on long-run climatology for the Indian Ocean. 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
21.0°C
warm · Excellent
Live water now
…
Recommended wetsuit
Shorty 2mm
At 21.0°C a 2mm shorty keeps surfers warm; lap swimmers can usually skip the neoprene.
Monthly comparison
Yes — comfortable for most swimmers · Nilaveli Beach
Can you swim at Nilaveli Beach in June? — 21.0°C water21.0°CCan you swim at Nilaveli Beach in July? — 20.0°C water20.0°CCan you swim at Nilaveli Beach in August? — 20.0°C water20.0°CCan you swim at Nilaveli Beach in September? — 21.0°C water21.0°CCan you swim at Nilaveli Beach in October? — 22.0°C water22.0°CCan you swim at Nilaveli Beach in November? — 23.0°C water23.0°C
Frequently asked questions
What is the average sea temperature at Nilaveli Beach in September?
Nilaveli Beach averages 21.0°C in September, based on long-run climatology for the Indian Ocean.
Is the sea warm enough to swim at Nilaveli Beach in September?
Yes, most swimmers find 21.0°C comfortable for unrestricted swimming.
Do I need a wetsuit at Nilaveli Beach in September?
Most swimmers don't need a wetsuit; a rash vest helps for longer sessions.