Diving Trogir - Krknjasi (Blue Lagoon)
Site Overview
Trogir - Krknjasi (Blue Lagoon) is a lagoon dive site in Central Dalmatia - Sibenik, Split & Islands, Croatia, set in the clear, fish-rich waters of the Adriatic Sea. The Krknjaši Blue Lagoon is a shallow, turquoise bay near Trogir, ideal for training and night dives. Stingrays and cuttlefish are regular inhabitants of the sandy bottom. The calm, clear water makes it perfect for courses and relaxed fun dives. Visibility is usually good, and the site is convenient close to Trogir and Split. It is a gentle, family-friendly dive. It is a favourite for night dives and underwater photography. Conditions are typical of the Croatian coast: visibility generally runs from 12 to 30 metres, the current is low and the water temperature ranges between 15 and 26 degrees Celsius depending on season and depth. The marine life is classic Adriatic, centred on common stingray, common cuttlefish, two-banded seabream, with the full community described below for those planning a dive. Because of its beginner rating and the need for Open Water certification, Trogir - Krknjasi (Blue Lagoon) is best approached with the right thermal protection and, where relevant, wreck or deep training. It is a representative example of why Croatian diving, with its wrecks, walls, caves and gorgonian forests, attracts divers who want history and Mediterranean life in equal measure.
Dive Briefing
"Entry is made by boat, with a transfer of about 15 minutes near Trogir, and divers should check in with a local centre before entering the water. The Krknjaši Blue Lagoon is a shallow, turquoise bay near Trogir, ideal for training and night dives. Stingrays and cuttlefish are regular inhabitants of the sandy bottom. The calm, clear water makes it perfect for courses and relaxed fun dives. Visibility is usually good, and the site is convenient close to Trogir and Split. Plan your profile around a maximum depth of 18 m and an average of 8 m, keeping a close eye on gas and, in deeper sections, on the cold thermocline. Buoyancy control matters: silty or vegetated bottoms and submerged structures are easily disturbed, and shallow depth limits skills to shallow profiles is a real consideration here. Take a moment to review the site-specific hazards with your guide, because conditions at Trogir - Krknjasi (Blue Lagoon) can shift quickly with wind and tide and change the feel of the dive. A safe ascent with a surface marker buoy and a clear exit plan completes the dive, with emergency cover routed through Split University Hospital Hyperbaric Chamber."
Signature Marine Life
Common Stingray
Dasyatis pastinaca
Best: May, June, July
Common Cuttlefish
Sepia officinalis
Best: May, June, July
Two-banded Seabream
Diplodus vulgaris
Best: May, June, July
Common Octopus
Octopus vulgaris
Best: May, June, July
Small Red Scorpionfish
Scorpaena notata
Best: May, June, July
Long-snouted Seahorse
Hippocampus guttulatus
Best: May, June, July
Safety & Hazards
- Shallow depth limits skills to shallow profiles
- Occasional boat traffic in the lagoon
- Silt disturbance over sand
- Cold thermocline below the surface
- Snag on seagrass
- Busy in summer peak
Traveler Notes
Who is this for?
Trogir - Krknjasi (Blue Lagoon) suits beginner divers holding at least an Open Water certification, and it is a strong choice for those who enjoy the clear, fish-rich water of the Croatian Adriatic. Photographers, training groups and divers chasing wrecks, walls, caves or macro life will all find something here, provided they respect the temperature, the marine park rules and the limits of each site. It is less suitable for absolute novices unless booked through a centre running a supervised course, and the deepest or most enclosed sections should only be attempted with the correct specialist training and a guide. Planning a dive here with a licensed Croatian operator not only keeps you safe but also helps protect the fragile gorgonian forests, seagrass and wrecks that make the site special.
For Non-Divers
Trogir old town (UNESCO); Blue Lagoon boat trips; Beaches; Split nearby
Quick Stats
Dive Logistics
- Split Diving
- Hvar Diving Center
- Vis Diving
- Brac Aquatic
Photography Info
Best for: macro, wide_angle
Nearby Stay
Hotel Park
Split • 15km away
Hotel Adriana
Hvar • 15km away