May is a popular month to ask about Sveti Ivan because conditions can shift week to week along this coast. Expect the water near 19.0°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.
Sveti Ivan sea temperature in May — averages 19.0°C
The sea at Sveti Ivan in Croatia averages 19.0°C during May, 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 · May
19.0°C
mild · Good
Live water now
…
Recommended wetsuit
Shorty 2mm
At 19.0°C a 2mm shorty keeps surfers warm; lap swimmers can usually skip the neoprene.
Monthly comparison
Yes, but expect a fresh dip · Sveti Ivan
Can you swim at Sveti Ivan in June? — 23.0°C water23.0°CCan you swim at Sveti Ivan in July? — 25.0°C water25.0°CCan you swim at Sveti Ivan in August? — 26.0°C water26.0°CCan you swim at Sveti Ivan in September? — 23.0°C water23.0°CCan you swim at Sveti Ivan in October? — 20.0°C water20.0°CCan you swim at Sveti Ivan in November? — 17.0°C water17.0°C
Frequently asked questions
What is the average sea temperature at Sveti Ivan in May?
Sveti Ivan averages 19.0°C in May, based on long-run climatology for the Adriatic Sea.
Is the sea warm enough to swim at Sveti Ivan in May?
It is swimmable but fresh; confident swimmers will be fine without a wetsuit.
Do I need a wetsuit at Sveti Ivan in May?
A 2 mm shorty is comfortable for sessions over 30 minutes.