Diving the Blue Hole, Gozo: The Complete Dive Site Guide
Ask any diver to name one dive site in the Maltese Islands, and the answer is almost always the same: the Blue Hole in Gozo. Carved by wind and waves into the limestone coast at Dwejra, this natural rock pool drops into a shadowy arch that opens onto the open sea — and onto the fallen remains of the Azure Window, now one of the Mediterranean’s most atmospheric underwater landscapes. Whether you’re a newly certified open water diver or a seasoned technical diver, the Blue Hole belongs on your Gozo diving itinerary.
What Is the Blue Hole?
The Blue Hole is a vertical shaft in the rock, roughly 10 metres across and about 15 metres deep, connected to the sea by an underwater archway at around 8 metres. Formed over millennia by the collapse of a surface cave, it acts as a sheltered natural entry and exit point — one of the reasons diving at the Blue Hole is possible even when the open coastline is choppy. Swim through the arch and the site opens dramatically: a boulder-strewn seabed sloping past 40 metres, sheer walls draped in golden cup coral, and the vast blocks of the collapsed Azure Window resting where the iconic arch fell in March 2017. What was once Gozo’s most photographed landmark above the surface is now its most compelling attraction below it.Dive Site Overview
- Location: Dwejra, San Lawrenz, on Gozo’s west coast — about 25 minutes’ drive from the Mgarr ferry terminal.
- Type: Shore dive with natural pool entry.
- Depth: 15 m inside the hole; 25–45 m+ beyond the arch depending on your route.
- Level: Open Water and above for the main site; Advanced or technical certification recommended for the Azure Window debris field and deeper walls.
- Visibility: Typically 20–40 m—among the best in the Mediterranean.
- Water temperature: Around 15°C in winter to 26–28°C in late summer.
- Best conditions: Calm days with easterly or no wind; a north-westerly swell makes entry and exit hazardous.
What You’ll See: Underwater Highlights
The Archway
The signature moment of the dive. Descending inside the pool, you pass beneath the arch at around 8 metres and emerge into deep blue open water. Looking back from the seaward side, the arch frames the bright turquoise pool above — one of the most photographed underwater scenes in Malta and Gozo.The Azure Window Ruins
Just north of the exit lie the colossal remains of the Azure Window. Slabs of limestone the size of buildings now form swim-throughs, canyons and overhangs between roughly 15 and 55 metres. The debris field is still settling into a thriving artificial reef, attracting shoals of damselfish, barracuda and the occasional grouper. For divers who remember the window standing, it is a genuinely moving dive.The Chimney
Heading south instead, a narrow vertical crack in the wall — the Chimney — lets divers ascend from about 26 metres to 8 metres inside the rock itself, exiting near the Blue Hole. It’s a favourite finale for advanced divers and pairs naturally with a visit to Coral Gardens next door.Marine Life
Expect octopus and moray eels in the boulders, nudibranchs and fireworms on the walls, dense clouds of chromis, and — in summer — barracuda, amberjack and tuna cruising the blue. Night dives inside the hole reveal a completely different cast: slipper lobsters, shrimp and hunting congers.Entry, Exit and Getting There
From the Dwejra car park, the walk to the water crosses about 300 metres of uneven fossil-studded limestone, so sturdy boots and a well-balanced kit setup make a real difference. Entry is a simple giant stride or step-in from the rock shelf into the pool; the sheltered water makes final checks easy before you drop through the arch. Exit the same way — there’s a natural ‘staircase’ of rock steps at the pool’s edge. Arrive early in summer. The Blue Hole is Gozo’s busiest dive site, and the car park and entry pool fill quickly between June and September. Early morning slots also offer the best light through the archway for photographers.When to Dive the Blue Hole
The site dives well year-round. April to June and September to November offer the sweet spot of warm water, superb visibility and thinner crowds. Winter diving is excellent for experienced divers — visibility often peaks — but north-westerly storms can close the site for days at a time. Always check conditions with a local dive centre before making the trip to Dwejra; when the Blue Hole is blown out, the Inland Sea tunnel across the bay is often a sheltered alternative.Is the Blue Hole Suitable for Beginners?
Yes — with a guide. The pool entry, moderate depth inside the hole and easy navigation through the arch make it manageable for newly certified divers in calm conditions. That said, the open side drops away quickly, so good buoyancy control matters. Beginners should book with a licensed Gozo dive centre and leave the Azure Window debris field and the Chimney for after their advanced certification.Plan Your Blue Hole Dive
Few dive sites anywhere combine drama, history and accessibility like the Blue Hole. Add crystal visibility, the haunting ruins of the Azure Window and a swim-through exit like the Chimney, and it’s easy to see why it consistently ranks among the best dive sites in the Mediterranean. Pair it with the Inland Sea and Coral Gardens for a full day of world-class diving in Dwejra — and see for yourself why divers keep coming back to Gozo.FAQs
How deep is the Blue Hole in Gozo?
The hole itself is around 15 metres deep, with the archway to the open sea at about 8 metres. Beyond the arch, the seabed slopes past 40 metres, and the Azure Window debris field reaches depths of 50+ metres.Can you snorkel at the Blue Hole?
Yes. On calm days the pool is a spectacular snorkelling spot, with the archway clearly visible from the surface. Fins and caution on the rocky entry are essential, and swimmers should stay inside the pool when any swell is running.Do I need a boat to dive the Blue Hole?
No — it’s a shore dive. Divers walk in from the Dwejra car park and enter directly via the natural rock pool. Some dive centres also visit the site by boat when combining it with other west-coast dives.
