Alarm Rocks
Why dive here
With 58+ marine species recorded in the area - including blue sharks, blue whales, humpback whales, orcas and seals & sea lions - Alarm Rocks offers some of Alaska's richest wreck diving. Water ranges 5-15°C, warmest July, August, September.
Alarm Rocks, true to its name, is a collection of rocky outcrops in Alaska. We often find good numbers of salmon here, particularly during their runs. Look for Spiny Dogfish patrolling the deeper sections and keep an eye out for California Spot Prawns tucked into crevices. It’s a site best suited for divers who appreciate colder water and an opportunity to spot some unique Pacific Northwest marine life.
Safety Notes
Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.
Cold water this month (avg 11°C). Drysuit or thick wetsuit (7mm+) recommended.
Alarm Rocks Wreck History
Vessel Type
cargo ship
Cause
unknown
The dive site known as 'Brown Brothers' in the Ontario Great Lakes offers a fascinating glimpse into the region's rich maritime past. While records are scarce, the name suggests a historic Great Lakes freighter or schooner. The cold, fresh water of the Great Lakes provides incredible preservation conditions, meaning even centuries-old wooden wrecks can remain astonishingly intact. Divers exploring this site can expect to find a vessel frozen in time, with features like the hull, decking, and perhaps even masts and rigging visible. These wrecks are often protected heritage sites, offering a unique opportunity to dive through a piece of North American history, but requiring careful, responsible diving practices to preserve them for future generations.
Reviews for Alarm Rocks
Conditions
Ocean conditions, forecast and tides for Alarm Rocks
Alarm Rocks Ocean Conditions
Monthly averages for Alarm Rocks, 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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