Castle Rock
Conditions & tides
Scored by DiveConnect's site-physics model
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
Castle Rock lies off San Miguel Island, the westernmost of California's Channel Islands, within Channel Islands National Park. The island sits at the boundary of cooler northern Pacific waters and warmer southern currents, making the surrounding waters exposed and often subject to swell and wind. Access is typically by boat out of Ventura or Santa Barbara. The dive itself reaches a maximum depth of around 13 metres and is rated a beginner site. Divers here have reported bat stars along the bottom, along with blue rockfish and kelp rockfish moving through the kelp above.
AI overviewMarine life here
Confirmed by our research team, reported by independent divers, or observed nearby via iNaturalist — each entry is labelled with its source.
Kelp RockfishSebastes atrovirensReported here · unconfirmed
Blue RockfishSebastes mystinusReported here · unconfirmed
Bat StarPatiria miniataReported 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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