September is a popular month to ask about Lido Beach Opatija because conditions can shift week to week along this coast. Expect the water near 23.0°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.
Lido Beach Opatija sea temperature in September — averages 23.0°C
The sea at Lido Beach Opatija in Croatia averages 23.0°C during September, 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 · September
23.0°C
warm · Excellent
Live water now
…
Recommended wetsuit
Rash vest or swimsuit
At 23.0°C most swimmers and surfers are comfortable in a swimsuit or thin rash top.
Monthly comparison
Yes — comfortable for most swimmers · Lido Beach Opatija
Can you swim at Lido Beach Opatija in July? — 25.0°C water25.0°CCan you swim at Lido Beach Opatija in August? — 26.0°C water26.0°CCan you swim at Lido Beach Opatija in September? — 23.0°C water23.0°CCan you swim at Lido Beach Opatija in October? — 20.0°C water20.0°CCan you swim at Lido Beach Opatija in November? — 17.0°C water17.0°CCan you swim at Lido Beach Opatija in December? — 14.0°C water14.0°C
Frequently asked questions
What is the average sea temperature at Lido Beach Opatija in September?
Lido Beach Opatija averages 23.0°C in September, based on long-run climatology for the Adriatic Sea.
Is the sea warm enough to swim at Lido Beach Opatija in September?
Yes, most swimmers find 23.0°C comfortable for unrestricted swimming.
Do I need a wetsuit at Lido Beach Opatija in September?
Most swimmers don't need a wetsuit; a rash vest helps for longer sessions.