Sponge Forest - Big Boulders
Protected Area
Gerry E. Studds/Stellwagen Bank National Marine Sanctuary
Why dive here
With 35+ marine species recorded in the area - including nurse sharks - Sponge Forest - Big Boulders offers some of New England's richest reef diving. Water ranges 4-19°C, warmest July, August, September.
Drop into New England's chilly embrace at Sponge Forest, Big Boulders, and you're greeted by, well, big boulders. These rocks are absolutely covered in a surprising variety of sponges, adding some colour to an otherwise stark landscape. It’s a solid dive for those who enjoy macro life and don't mind the cooler water. You'll want good buoyancy here to really appreciate the textures.
Typical Sponge Forest - Big Boulders 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 15°C). Drysuit or thick wetsuit (7mm+) recommended.
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Conditions
Ocean conditions, forecast and tides for Sponge Forest - Big Boulders
Sponge Forest - Big Boulders Ocean Conditions
Monthly averages for Sponge Forest - Big Boulders, 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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