Cohen Reef
Protected Area
Shelter Island
Why dive here
With 58+ marine species recorded in the area - including blue sharks, blue whales, humpback whales, orcas and seals & sea lions - Cohen Reef offers some of Alaska's richest reef diving. Water ranges 5-15°C, warmest July, August, September.
Cohen Reef, off the coast of Alaska, isn't your typical coral reef experience. Think cold water, rugged beauty, and a surprising amount of life. We've often spotted prickly sculpin hunkered down among the rocks, and if you’re lucky, you might even catch a glimpse of an Orca pod passing through, especially during salmon runs. This spot is definitely for those who appreciate the raw, wild side of diving; come prepared for cooler temperatures and keep an eye out for bald eagles overhead while you’re gearing up.
Typical Cohen Reef Dive Profile
Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.
Safety Notes
Cold water this month (avg 11°C). Drysuit or thick wetsuit (7mm+) recommended.
Reviews for Cohen Reef
Conditions
Ocean conditions, forecast and tides for Cohen Reef
Cohen Reef Ocean Conditions
Monthly averages for Cohen Reef, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (57, -135.4) (0km away)
October Averages
Sea Temperature
11°C
51°F · Range: 8.5–12.8°C
Air Temperature
8°C
47°F
Wind Speed
6.44 m/s
12.5 knots
Atmospheric Pressure
1007.9 hPa
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data
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