miljenko diving on kohlen wreck

Weather conditions

Regulations governing diving in Croatia

Diving in National Park Kornati

Scuba diving

kornati-nautilus@globalnet.hr photo: mirjana matoš
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Winds, currents and waves

The Adriatic Sea is a semi-closed Sea,  characterized by intense cyclone  activities (especially in winter), when  winds blow in different directions and  intensities. Adriatic is under strong influence of  different air masses, and therefore heat  exchange between sea and atmosphere  shows a marked variability. In the summer months heat input into  the sea is the strongest in June and July,  due to dominant short-wave solar  radiation. At that time the sea creates a  thermo cline, which is preserved until  autumn. The most common surface waves are  caused by Bora and Sirocco wind in  winter and the northwest wind (mistral)  in summer. Bora is a dry cold wind blowing direction  from north - northeast to east -  southeast. In summer, it usually lasts a day or even  several hours while in winter it can blow  up to two weeks.  Sirocco is a warm and moist wind which  blows from east - southeast to south -  southwest. Its consequences are high  waves and rain. In summer it usually  blows up to 3 days, and in winter it can  blow up to 3 weeks. Sirocco causes  significantly greater waves than Bora at  the same speed and duration. In coastal  areas waves appear significantly smaller  than at the open sea.  Mistral is a daily thermal breeze that  blows from the northwest. It blows in the  period from spring to autumn, in  daytime, frequently changing its  direction. Burin blows in the opposite direction of  the Mistral. It blows strongest before  dawn and then abruptly stops. At night it  blows from the north - northeast in  northern Adriatic and from the east -  southeast in southern Adriatic. Wave height ranges between 0.5 and  1.5 m. Summer temperatures in July  range between 34 and 38 ° C.  High and low tides have relatively small  amplitudes in the Adriatic. In the  southern part of Adriatic sea the  difference is less than 40 cm and in the  northern part it reaches up to 1 m high.  Along the eastern (Croatian) Adriatic  coast, there is an incoming (NW) sea  current that transports salty Levantine  water into the Adriatic, while the western  (Italian) coast of the Adriatic takes  leakage of the less saline water from the  Adriatic. The average current speed is  about 0.5 knots, but it can reach speed  of up to 4 knots.  The average salinity in the Adriatic is  38.3 g per milliliter. Values of surface salinity decrease from  the southern to the northern Adriatic. On  Murter, due to the proximity of Lake  Vrana, the salinity is somewhat lower.
Ordinance on Performing Underwater Activities (Official papers no.  47/99, 23/2003, 28/2003, 52/2003, 58/2003 and 96/10)  Organised diving in Croatia is performed by private and legal persons  who have obtained a concession for performing these activities (training  of divers, organizing diving excursions, etc.).  Individual diving is done by Authorization for individual dive.  Maximum permitted depth for sport - recreational diving on air is 40  meters. The area where diving is performed must be visibly marked with a  orange or red buoy or dive flag.    Diving is not allowed:  a) in the areas of internal sea waters encompassing harbours, accesses  to the ports, anchorages ports and heavy traffic,  b) in parts of the inland sea and the Croatian territorial waters where it is  regulated by special laws or regulations of the government,  c) the strict and special reserves in the sea, the nature parks and other  protected areas of the sea and seabed  (such as Mali Ston Bay, Lim Bay, Park of Nature Telascica and others), d) National parks Brijuni, Kornati, Krka and Mljet,  e) near the anchored warships and protected military facilities at the  coastal edge at a distance of 100 meters.  f) at sites that are protected by regulations of cultural property  protection.  Exceptionally, diving permission for points c) and d) is issued by the  government body responsible for environmental protection under the  conditions prescribed by the regulations in the field of nature protection. 
Diving in National Park Kornati is  permitted only in arrangement of  private or legal person registered for  such activities and that has obtained  the permission to organize and  conduct diving trips to National Park  Kornati from governmental institution.  Individual or night dives  are not  allowed (between 7 pm and 7 am).  Divers may not carry only a knife, any  other weapon (on boat as well) is not  allowed.  There are 9 zones where is permitted  to dive in National Park Kornati  1. Kornat (Opat - Tanka Prisliga),  2. Samograd,  3. Oključ, 4. Mala Panitula, 5. Vela Panitula, 6. Rašip, 7. Mali Rašip, 8. Mana, 9. Borovnik. 

What to bear in mind

when going scuba diving

Diving season begins in spring,  around Easter and lasts until  November, when it is still possible to  dive.  The sea is warmer from April, when  the surface temperature is about 18 °  C. High season is during July and  August. In summer, the surface is heated  between 22 and 26 ° C, depending on  the depth you can expect a  temperature of 18 ° C to 14 ° C when  diving.  Visibility is excellent, sometimes more than 50 meters. We recommend diving in June and  September, when the sea is warm,  visibility is the best and there are no  crowds. Take with you on a diving trip:  Diving card (SSI, PADI, CMAS, etc.) Diving equipment  Diving diary  Medical certificate Personal items (money, sun cream,  towel, drinks and food)