SS Thistlegorm

SS Thistlegorm Diving Guide

The SS Thistlegorm, a British armed merchant navy ship sunk in 1941 by German bombers, is considered one of the world's best wreck dives. Loaded with a cargo of wartime supplies, it offers a fascinating glimpse into history and a vibrant artificial reef teeming with marine life.

Dive Details

Typical Depth Range

The deck of the SS Thistlegorm lies at a depth of approximately 16-21 meters (52-69 feet), while the seabed is around 30-32 meters (98-105 feet). Penetration dives into the cargo holds can reach deeper, depending on the area.

Average Visibility

Visibility typically ranges from 20-30 meters (65-100 feet), but can be affected by weather conditions, currents, and boat traffic. Strong currents can occasionally reduce visibility.

Water Temperature (Seasonal)

• Summer (June-August): 27-30°C (81-86°F)
• Autumn (September-November): 25-28°C (77-82°F)
• Winter (December-February): 21-24°C (70-75°F)
• Spring (March-May): 23-26°C (73-79°F)

Difficulty Level

The SS Thistlegorm dive is generally considered an intermediate dive due to its depth and potential for strong currents. Penetration dives require advanced certification and experience, as they involve navigating confined spaces and potential silt-out conditions.

Marine Life

The wreck has become a thriving artificial reef, attracting a diverse array of marine life. Divers can expect to see large schools of barracuda, tuna, jacks, and snappers. Nudibranchs, scorpionfish, and groupers are common inhabitants. The wreck's exterior is covered in soft corals and sponges, providing shelter for smaller fish and invertebrates.

Best Time to Visit

The best time to dive the SS Thistlegorm is generally during the shoulder seasons, from April to May and September to October. During these months, the water temperature is comfortable, visibility is usually excellent, and the crowds are smaller compared to the peak summer months. Winter offers good visibility, but the water temperature is cooler.

What Makes It Special

• Incredible cargo: Motorbikes, trucks, Bedford vans, Bren gun carriers, rifles, ammunition, and railway engines are all preserved within the wreck.
• Historical significance: A tangible link to World War II history.
• Abundant marine life: A vibrant artificial reef ecosystem.
• Relatively intact: Despite its age, the wreck is remarkably well-preserved.

Practical Tips

• Bring a dive light: Essential for exploring the dark interior of the wreck.
• Be aware of currents: Check current conditions with your dive operator and be prepared for potential surges.
• Respect the wreck: Avoid touching or removing anything from the site. It's a war grave.
• Consider nitrox: Nitrox can extend your bottom time at the deeper depths of the wreck.
• Book in advance: The SS Thistlegorm is a popular dive site, so book your trip well in advance, especially during peak season.
• Choose a reputable dive operator: Ensure your dive operator has experience diving the Thistlegorm and prioritizes safety.