USS San Diego
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Marine forecast via Copernicus Marine. Score is a rule-based guide from swell/wind vs. the site's exposure — always dive your own assessment.
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About this site
The USS San Diego is a 503-foot (153 m) armoured cruiser wreck, one of the most visited wrecks in the Northeast. Known as the Diego, she was the only major US warship lost in World War I. She went down in 1918, and it is now believed she was sunk by a mine laid by the German submarine U-156.
She lies upside down in about 110 feet (34 m) of water. The top of the wreck now begins around 80 feet (24 m), because her internal decks are collapsing at an increasing rate. Divers without overhead training can still tour the mostly intact exterior, which keeps many of its side-mounted guns. For wreck penetration few ships offer such a vast interior, but the wreck is in an advanced state of deterioration and needs great care inside.
The wreck is on the National Register of Historic Places, and taking artifacts is expressly prohibited. Water temperature ranges from 4 to 15°C (39 to 59°F).
Marine life here
Confirmed by our research team, reported by independent divers, or observed nearby via iNaturalist — each entry is labelled with its source.
Common DolphinDelphinus delphisReported here · unconfirmed
Little SkateLeucoraja erinaceusReported here · unconfirmed
Durable tips from divers — access, hazards, marine life, facilities. For day-of conditions, use the report tool in the conditions card above.
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