Wreck Roza Vlassi - Alonissos Marine Park

The Roza Vlassi, a cargo ship that met its end in 1996, sits upright on the seabed, perfectly preserved in the cool embrace of the Aegean. It's a proper wreck dive, not just a pile of rubble. We’re talking about a 45-meter ship, with its mast still standing tall, decks largely intact, and holds open for exploration. It feels like stepping into a moment frozen in time. What really gets us about the Roza Vlassi is the way the Mediterranean has claimed it. Swathes of yellow and orange sponges blanket the steel, and schools of damselfish flit in and out of the bridge. Look closely, and you’ll spot moray eels peering from crevices, and octopus sometimes tucked away in the darker corners of the cargo holds. We’d suggest exploring the stern first, heading towards the bow, taking your time to really absorb the scale of it. Visibility here is usually excellent, often 25 meters plus, which really lets you appreciate the entire structure from a distance before you get up close. It’s a dive that rewards patient exploration, fantastic for advanced divers who appreciate a good historical wreck without strong currents to contend with.

Location: Alonissos Marine Park, Greece, Mediterranean & Europe
Coordinates: 37.651207, 24.064522
Type: wreck

Marine Protected Area: SOUNIO - NISIDA PATROKLOU KAI PARAKTIA THALASSIA ZONI

Best Time to Dive in Alonissos Marine Park

The warmest water temperatures in Alonissos Marine Park occur in August, averaging 27.2°C. The coolest conditions are in February at 13.9°C.

Monthly Water Temperatures

January: 14.5°C
February: 13.9°C
March: 14.2°C
April: 15.4°C
May: 18.7°C
June: 23.5°C
July: 26.5°C
August: 27.2°C
September: 25.3°C
October: 22.8°C
November: 19.9°C
December: 16.9°C

Nearest Dive Centres to Wreck Roza Vlassi

Marine Life in Alonissos Marine Park

Home to 16 recorded species including 3 whales & dolphins, 3 reef fish, 2 other, 2 hard corals, 2 crabs & lobsters, 1 seagrass & algae.

Notable Species

loggerhead turtle (Caretta caretta)
Blue-white Dolphin (Stenella coeruleoalba) - Whales & Dolphins
Leidy's Comb Jelly (Mnemiopsis leidyi)
Cowfish (Tursiops truncatus) - Whales & Dolphins
Marbled Spinefoot (Siganus rivulatus) - Reef Fish
Silver-cheeked Toadfish (Lagocephalus sceleratus) - Reef Fish
Devonshire cup coral (Caryophyllia (Caryophyllia) smithii) - Hard Corals
Species code: Hs (Halophila stipulacea) - Seagrass & Algae
Short-beaked Common Dolphin (Delphinus delphis) - Whales & Dolphins
Norway Lobster (Nephrops norvegicus) - Crabs & Lobsters
Red coral (Corallium rubrum) - Soft Corals
Bottleneck Sea Cucumber (Holothuria (Thymiosycia) impatiens) - Sea Cucumbers
Sand mason (Lanice conchilega) - Worms
Bushy Coral (Cladocora caespitosa) - Hard Corals
Wrasse (Coris julis) - Reef Fish
Blue Crab (Callinectes sapidus) - Crabs & Lobsters

Recommended Packing List for Wreck Roza Vlassi

Based on average water temperature of 19.9°C, currents 3 cm/s.

Wetsuit (3-5mm) - comfortable for 20°C water
Mask - essential for every dive
Fins
BCD - buoyancy compensator
Regulator - your most safety-critical piece of gear
Dive Computer - tracks depth, time, and NDL
Surface Marker Buoy (SMB) - essential for boat pickups
Dive Torch - useful for crevices and colour at depth
Underwater Camera - capture your diving memories