Cathedral Rocks
Protected Area
Straitsmouth Island
Why dive here
With 35+ marine species recorded in the area - including nurse sharks - Cathedral Rocks offers some of New England's richest diving. Water ranges 4-19°C, warmest July, August, September.
Cathedral Rocks offers a rugged New England dive, best suited for those comfortable with chilly water and rocky topography. Below the surface, you’ll navigate large boulders and ledges, with plenty of nooks to poke around in. Expect to spot lobsters, crabs, and a variety of cold-water fish hugging the substrate. It's a solid choice for a local boat dive when conditions are calm.
Safety Notes
Cold water this month (avg 15°C). Drysuit or thick wetsuit (7mm+) recommended.
Nearest Dive Centres to Cathedral Rocks
Dive shops near Cathedral Rocks
Undersea Divers
Portsmouth Scuba
Discover Diving
Boston Scuba Inc
Reviews for Cathedral Rocks
Conditions
Ocean conditions, forecast and tides for Cathedral Rocks
Cathedral Rocks Ocean Conditions
Monthly averages for Cathedral Rocks, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (42.6, -70.6) (0km away)
October Averages
Sea Temperature
15°C
59°F · Range: 12.8–18.1°C
Air Temperature
10°C
50°F
Wind Speed
3.78 m/s
7.3 knots
Atmospheric Pressure
1017 hPa
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data
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