October is a popular month to ask about Strunjan because conditions can shift week to week along this coast. Expect the water near 20.0°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 Adriatic Sea.
Strunjan sea temperature in October — averages 20.0°C
The sea at Strunjan in Slovenia averages 20.0°C during October, based on long-run climatology for the Adriatic 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 · October
20.0°C
warm · Good
Live water now
…
Recommended wetsuit
Shorty 2mm
At 20.0°C a 2mm shorty keeps surfers warm; lap swimmers can usually skip the neoprene.
Monthly comparison
Yes — comfortable for most swimmers · Strunjan
Can you swim at Strunjan in June? — 23.0°C water23.0°CCan you swim at Strunjan in July? — 25.0°C water25.0°CCan you swim at Strunjan in August? — 26.0°C water26.0°CCan you swim at Strunjan in September? — 23.0°C water23.0°CCan you swim at Strunjan in October? — 20.0°C water20.0°CCan you swim at Strunjan in November? — 17.0°C water17.0°C
Frequently asked questions
What is the average sea temperature at Strunjan in October?
Strunjan averages 20.0°C in October, based on long-run climatology for the Adriatic Sea.
Is the sea warm enough to swim at Strunjan in October?
Yes, most swimmers find 20.0°C comfortable for unrestricted swimming.
Do I need a wetsuit at Strunjan in October?
Most swimmers don't need a wetsuit; a rash vest helps for longer sessions.