Observatory Rock
Why dive here
With 58+ marine species recorded in the area - including blue sharks, blue whales, humpback whales, orcas and seals & sea lions - Observatory Rock offers some of Alaska's richest diving. Water ranges 5-15°C, warmest July, August, September.
Diving Observatory Rock in Alaska can be a real hit or miss, but mostly it's a quiet, cold water explore. You'll find yourself drifting along rocky walls, often packed with Green Sea Urchins and Sunflower Stars. Keep an eye out for sculpin tucked into crevices and, if you're lucky, the odd Spotted Ratfish gliding by. It’s a good spot for divers keen on macro life and those who appreciate the unique beauty of temperate Pacific ecosystems, without expecting dramatic coral landscapes.
Safety Notes
Cold water this month (avg 11°C). Drysuit or thick wetsuit (7mm+) recommended.
Reviews for Observatory Rock
Conditions
Ocean conditions, forecast and tides for Observatory Rock
Observatory Rock Ocean Conditions
Monthly averages for Observatory Rock, 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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