Diving in Croatia

Croatia diving it is!

This beautiful country is located in Europe and is the northernmost point of the Mediterranean Sea. Croatia does not only enjoy the abundance of sunshine but also has one of the cleanest and warmest seas that reaches a temperature of 32 degrees. The Adriatic Sea is mostly closed in the south and has an increased percentage of salinity. An interesting fact is that the direction of islands follows the direction of the mountains on the mainland.  This was first noted on the coast of Dalmatia and today such a type of coastline is known as the Dalmatian type coastline. The Adriatic Sea is rich in beautiful endemic flora and fauna, centuries-old history and a  color spectrum that cannot be found above the surface and is considered the cleanest and purest sea in Europe

Croatian sunset 1

Geographical features of the Adriatic Sea

The Adriatic Sea is divided into three parts or geographical units with regard to depth and some other characteristics: the northern, middle and southern parts. The southern part is linked to the Mediterranean Sea that enters through the Strait of Otranto and is the deepest part of the Adriatic (1,233 m). The middle part is much shallower, its depth does not exceed one hundred meters. The northern, narrowest part, with depths of maximum 50 m meets the mainland of Europe near Trieste and Venice.

The sea is influenced by the Moon’s gravity causing water tides changes. The changes in the Adriatic Sea are poorly expressed, in the southern part the difference rarely exceeds 40 centimeters, while in the northern part it is higher -in Istria, the difference can reach up to one meter. Sea currents are formed under the influence of tide changes, but their speeds are mostly low. The average time needed for the water of the entire Adriatic to change is about three and a half years.

Waves occur mainly as a result of wind and the shape of the coast which shape their strength and height. The average wave height is from 0.5 to 2.5 meters, but the highest wave on the Adriatic of 10.8 meters was recorded during a long-lasting stormy south wind. There are two important winds in the area, Jugo (Sirocco) and Bura (Bora). The Jugo is a hot wind that brings rain and moisture and blows from the direction of the south, while the Bura is a cold and sharp wind that brings nice and sunny weather and blows from the north. The Jugo usually produces much larger and stronger waves, while the Bura creates lower and foamy waves of higher speed. So far, the highest Bura speed of 212 km/h (120 knots) was measured in 1996, while the Jugo can reach the speed of 115 km/h (60 knots).

The Adriatic is a warm sea where at the maximum depth the temperature does not fall below 10 to 12 degrees. In summer, the surface temperature of the sea reaches more than 29 °C, but in winter, due to exposure to cold air and wind, it cools down to 9 °C.  An interesting phenomenon called “Thermocline” appears in the diving season. This is the boundary between two layers where the temperature drops or rises rapidly. In the summer, we notice the first thermocline at depths of between 3 and 5 meters, the second at about 12-14 meters and the next one at 18 meters, while at depths of more than 30 meters the temperature is mostly constant throughout the year.