Diving atInland Sea (Malta)
Navigating the Inland Sea tunnel requires careful attention to potential hazards. While generally safe, low light conditions and possible currents near the open sea exit demand awareness. The tunnel's structure, reaching depths of 26 m / 85 ft, also has overhead boat traffic. Surfacing within the tunnel is not recommended due to these tourist boats. This unique geological formation, a semi-circular lagoon connected to the open sea, demands a cautious and prepared approach from all divers.
Evening condition tracking at Inland Sea features an air temperature of 17.1°C. We have recorded wave heights measuring 0.42m during this period. These figures outline the environmental parameters currently present.
Dive Site Coordinates
36.0541, 14.1910
Dive Site Characteristics
Key Dive Site Facts
Dive Site Overview
A distinctive dive experience awaits at the Inland Sea, connecting a calm, shallow lagoon to the expansive Mediterranean via an 80 m / 260 ft natural tunnel. Entering the water from the shore of this 60 m / 197 ft wide lagoon, divers begin in mere 2 m / 7 ft depths before progressing into the tunnel itself.
Inside, the bottom progressively deepens from 3 m / 10 ft on the lagoon side to 26 m / 85 ft at its seaward end. This impressive passage features vertical walls and a pebble bottom, eventually opening to a field of large boulders near the exit. Beyond the tunnel, divers have options to explore vibrant reef walls extending north and south, potentially continuing south towards the Blue Hole and Azure Reef, or investigating cracks like Whale Cave to the north.
Returning often involves retracing the tunnel, providing another perspective on its dramatic structure. Excellent visibility is typical, often between 20-40 m / 65-130 ft, enhancing the aesthetic experience of light and shadow play within this unique site.
Best Time to Dive
For the most comfortable and rewarding dive experience at the Inland Sea, consider visiting during the warmer, drier months. June through September typically offer optimal conditions, with average air temperatures peaking around 26.1°C / 79°F in August, and rainfall being minimal, often less than 1 mm. These months consistently yield a "Good" dive score of 8 according to historical data, suggesting favorable weather and calm seas. October still presents good opportunities, with air temperatures averaging 23.1°C / 73°F and a good dive score of 7, though rain might increase slightly. Diving earlier in the day or outside the peak tourist season can help avoid crowds, as the site is popular, particularly in summer. Conditions during cooler months, from December to March, show lower air temperatures around 14.9-16.7°C / 59-62°F and higher average wave heights, indicating a more challenging dive environment.
Climate Historical Averages
Monthly records compiled from satellite and marine observation nodes over the last 3 years. Data provided by Open-Meteo and MET Norway.
Dive Experience & Conditions
A varied depth profile defines the Inland Sea, beginning in the very shallow lagoon at around 2 m / 7 ft. Divers then enter the natural tunnel, where the bottom gradually slopes from 3 m / 10 ft at the lagoon entrance to approximately 26 m / 85 ft at the seaward exit. Beyond the tunnel, the seabed drops significantly, reaching depths of 50 m / 164 ft or more, allowing for extended exploration along the outer reef walls. This site can accommodate divers of various levels; while the shallow entry and gradual descent are beginner-friendly, the option to explore deeper external reefs or navigate the full tunnel to its maximum depth makes it appealing to more experienced individuals. Striking vertical walls characterize the tunnel itself, and a pebble bottom transitions to large boulders at its mouth, creating a dramatic visual shift from the confined passage to the open ocean.
Dive Difficulty & Safety Guidelines
Divers approaching the Inland Sea tunnel should be well-prepared for specific environmental considerations, regardless of overall experience. While the site is generally safe, sections of lower light and potentially narrow passages demand good buoyancy control. Near the open sea exit, currents can sometimes be present, requiring awareness and careful navigation. A significant safety consideration is the presence of tourist powerboats operating within the tunnel at the surface; surfacing inside the tunnel is not recommended for diver safety. Always dive with a buddy, ensure your equipment is well-maintained, and maintain appropriate training for overhead environments. It's advisable to check local conditions, especially regarding currents, before entering the tunnel from the lagoon side.
Recommended Equipment
No verified equipment items yet.
Verified equipment recommendations for this dive site are being reviewed and may be added as additional source checks are completed.
Recommended Dive Suit
Recent conditions suggest the water at Inland Sea remains near 18°C (64°F), offering typical conditions for the area. Surface air temperatures are resting at 17°C (63°F).
Environmental conditions appear stable for the near future.
In water temperatures like these, 5mm wetsuit typically offers sufficient warmth for most recreational dives. Some divers naturally tolerate cooler water better than others. Surface intervals may feel noticeably cooler once you exit the water.
Conditions last reviewed: 18:00 using the latest environmental data.
Dive Logistics & Preparation
Hyperbaric Chamber
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Entry Requirements
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Currency
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Nearest Airports
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Marine Life at Inland Sea
The Inland Sea and its adjacent open reef boast a diverse array of Mediterranean marine life, creating engaging encounters for divers. Inside the tunnel, divers may spot smaller species seeking shelter among the rock formations and colorful sponges. Upon exiting into the open sea, the environment expands, offering opportunities to observe more pelagic and reef-dwelling creatures. Common sightings include moray eels inhabiting crevices and scorpionfish camouflaged against the seabed. Divers often encounter schools of barracudas, octopuses, and various small reef fish, particularly along the outer cliff walls and around the larger boulders at the tunnel's mouth. Nudibranchs can also be found, adding vibrant details to the rocky underwater landscape.
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Frequently Asked Questions
Is the Inland Sea suitable for beginner divers?
Yes, the Inland Sea is suitable for various diver levels, including beginners. The shallow entry from the lagoon and gradual descent into the tunnel make it accessible for less experienced divers. However, exploring the deeper outer reef sections is better suited for those with more experience.
How do divers access the Inland Sea dive site?
Access to the Inland Sea is straightforward, achieved via shore entry at the lagoon itself. Divers enter the calm, shallow waters and swim towards the tunnel entrance, beginning their descent from there.
Can the tunnel be dangerous to dive?
While the tunnel is generally safe for experienced divers, potential hazards include low light, narrow passages, and occasional currents near the open sea exit. There is also overhead tourist boat traffic, so surfacing within the tunnel is not recommended for safety reasons.
Is the Inland Sea dive crowded?
The Inland Sea is a popular dive site, especially during the summer months. Divers can typically avoid peak crowds by planning their dives early in the day or by visiting during the shoulder seasons outside of peak tourist times.
What is the visibility like while diving the Inland Sea?
Visibility at the Inland Sea is usually excellent, often ranging from 20 to 40 meters / 65 to 130 feet. This clear water significantly enhances the experience of navigating the tunnel and exploring the surrounding reef.
What marine life can be seen while diving here?
Divers commonly encounter moray eels and scorpionfish. Other sightings include groupers, barracudas, octopuses, nudibranchs, and various small reef fish, particularly along the reef walls outside the tunnel.
What is the maximum depth encountered in the tunnel?
Inside the natural tunnel, the maximum depth reached is about 26 meters / 85 feet at its seaward end. Outside the tunnel, the seabed drops significantly deeper, around 50 meters / 164 feet.
What other dive sites are nearby?
The Dwejra area offers several other notable dive sites in close proximity to the Inland Sea. These include the Blue Hole and Coral Gardens, which are easily accessible and provide varied diving experiences.
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