Sea temperature - Opatija

The sea temperature in Opatija gradually rises from April and May, and it is possible to swim there already in June. The maximum sea temperature in Opatija is reached during the summer months, mainly in July and August. However, it is still possible to swim in Opatija in September. During the fall, the sea temperature in Opatija drops sharply and reaches temperatures below 10 degrees Celsius (50 degrees Fahrenheit). Opatija records typical Kvarner sea temperatures, and the sea temperature in the city of Rijeka, the sea temperatures in Mošćenička Draga, and the sea temperatures in Lovran is similar to the sea temperature in Opatija. The sea temperature in Opatija is measured by a buoy with a sea temperature sensor, which is located at the Lido cape near the Franz Joseph I coastal promenade.