HMS Cairo - Tabarka
The HMS Thetis, lying off Ustica, is more than just a wreck; it’s a sombre piece of history frozen in time. This 1938 T-class submarine went down during sea trials, a tragedy that cost 99 lives, and we feel that weight when we descend. The wreck itself is remarkably intact for its age, stretched out on the seabed, its outline still clearly that of a submarine. As you explore, you can make out the conning tower, the torpedo tubes, and the sheer scale of the vessel. The Mediterranean’s growth has begun to reclaim it, with bushy coral and sunset cup coral clinging to the metalwork, a beautiful contrast to the dark hull. We’ve seen conger eels peering from dark recesses and the occasional loggerhead turtle gliding past, seemingly unfazed by this metal behemoth. Damsel fish flit around the superstructure in shimmering clouds. Our favourite part has to be the way the light filters through the water, illuminating different sections of the wreck at various times of day. This is a dive for those who appreciate history and the quiet dignity of a maritime grave.
- Location
- Tabarka, Tunisia, Mediterranean & Europe
- Coordinates
- 37.433334, 10.366667
- Type
- wreck
Marine Protected Area: Lagune de Ghar El Melh et delta de la medjerda
Best Time to Dive in Tabarka
The warmest water temperatures in Tabarka occur in January, averaging 16.7°C. The coolest conditions are in December at 16.7°C.
Monthly Water Temperatures
- January: 16.7°C (air: 14.4°C)
- February: 16.7°C (air: 14.5°C)
- March: 16.7°C (air: 14.8°C)
- April: 16.7°C (air: 16.1°C)
- May: 16.7°C (air: 18.8°C)
- June: 16.7°C (air: 22.7°C)
- July: 16.7°C (air: 26.0°C)
- August: 16.7°C (air: 26.7°C)
- September: 16.7°C (air: 25.3°C)
- October: 16.7°C (air: 22.6°C)
- November: 16.7°C (air: 19.2°C)
- December: 16.7°C (air: 16.1°C)
Nearby Dive Sites in Tabarka
- ANNA CATERINA - 60m (wreck)
- BENIVENTO - 0m (wreck)
- BESSY G. - 1m (wreck)
- BLOSSOM (STERN SECTION) - 8m (wreck)
- BRANDARIS - 3m (wreck)
- CARMELO MARULLO II - 50m (wreck)
- CHRISTIAN MICHELSEN - 16m (wreck)
- CONGELSA - 5m (wreck)
- Dive-X Active Sport - Cala Gadir
- Dive-X Active Sport - Cala Tramontana
- EMPIRE SONG (POSSIBLY) - 50m (wreck)
- HELENE CLIPPER - 60m (wreck)
- HERMES - 1m (wreck)
- HMS AVENGER - 60m (wreck)
- HMS Bedouin (reef)
Nearest Dive Centres to HMS Cairo
Marine Life in Tabarka
Home to 162 recorded species including 104 reef fish, 20 sharks & rays, 7 octopus & squid, 6 other, 5 whales & dolphins, 4 crabs & lobsters.
Notable Species
- loggerhead turtle (Caretta caretta)
- hake (Merluccius merluccius) - Reef Fish
- Pollock (Trachurus trachurus) - Reef Fish
- Mullet (Mullus barbatus) - Reef Fish
- european squid (Loligo vulgaris) - Octopus & Squid
- Pandora (Pagellus erythrinus) - Reef Fish
- Bogue (Boops boops) - Reef Fish
- Annular Seabream (Diplodus annularis) - Reef Fish
- pilchard (Sardina pilchardus) - Reef Fish
- Common octopus (Octopus vulgaris) - Octopus & Squid
- common cuttlefish (Sepia officinalis) - Octopus & Squid
- red mullet (Mullus surmuletus) - Reef Fish
- Split (Scomber scombrus) - Reef Fish
- Painted Comber (Serranus scriba) - Reef Fish
- Ribbonfish (Lepidopus caudatus) - Reef Fish
- Brown Comber (Serranus hepatus) - Reef Fish
- dory (Zeus faber) - Reef Fish
- Snapper (Sparus aurata) - Reef Fish
- Garrupa (Serranus cabrilla) - Reef Fish
- dogfish (Scyliorhinus canicula) - Sharks & Rays
Recommended Packing List for HMS Cairo
Based on average water temperature of 16.7°C.
- Wetsuit (5-7mm) - recommended for 17°C water
- Hood & Gloves (3-5mm) - helps retain warmth
- 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