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Saint Helena, Ascension and Tristan da Cunha

Plan your dives in Saint Helena, Ascension and Tristan da Cunha

✅ 10 dive sites • 📸 0 photos • 🗓 Best months: December to May, due to warmer water temperatures and optimal visibility.

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About Diving in Saint Helena, Ascension and Tristan da Cunha
Scuba diving in Saint Helena, Ascension, and Tristan da Cunha offers a unique experience in the remote South Atlantic Ocean. Divers can expect a serene atmosphere, far from the crowded dive spots, with pristine waters that reveal a hidden world teeming with life. Highlights include dramatic underwater landscapes, intriguing shipwrecks, and the chance to encounter rare marine species. Whether exploring volcanic rock formations or swimming alongside playful dolphins, divers are in for an unforgettable experience. The best time to dive is between December and May, when the waters are warmest and visibility is optimal. Interesting facts include the presence of unique species such as the endemic Saint Helena butterflyfish and the historical shipwrecks that date back to the island’s rich maritime past.
Diving Overview
Diving in this region is characterized by clear waters, diverse marine life, and a sense of exploration in relatively uncharted waters. With a mix of volcanic formations and historical shipwrecks, it offers a varied diving experience for enthusiasts.
Diving Conditions
Water temperatures range from 22°C to 27°C (72°F to 81°F). Visibility can reach up to 30 meters (100 feet). Currents are generally mild, making it suitable for divers of various skill levels. Conditions are typically calm, particularly during the recommended diving months.
Top Dive Sites
  1. Blackfish Catacombs (Saint Helena)
    Known for its stunning volcanic formations and tunnels that host a variety of marine life, including the rare Saint Helena butterflyfish.
  2. Boatswainbird Island (Ascension Island)
    Famous for its vibrant coral communities and the chance to see large aggregations of pelagic species like tuna and barracudas.
  3. Inaccessible Island (Tristan da Cunha)
    Offers dramatic underwater cliffs and the opportunity to encounter seals and unique fish species.
Marine Life
Divers can encounter a variety of marine life including dolphins, whale sharks, turtles, and numerous tropical fish. Notable species include the endemic Saint Helena butterflyfish and the Ascension Island frigatebird.
Reef Type
Primarily fringing reefs, with some volcanic rock formations.
Reef Condition
Generally pristine due to the remote location and limited human impact.
Conservation
There are several marine protected areas across the islands. Divers are expected to adhere to local regulations, which include no-touch policies for marine life and restrictions on fishing to preserve the biodiversity and health of the ecosystem.
Best Time to Dive
December to May, due to warmer water temperatures and optimal visibility.
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