Diving Tewksbury Rock
Tewksbury Rock is a pinnacle type ledge with varied topography and lots to see. Located East of Outer Brewster Island in the Boston Harbor Islands it’s about a 50 minute ride from the dive shop dock. The shallowest point is about 3m/10ft. at average low tide and the max depth without straying to Farr from the site is around 21m/70ft. The topography consists of huge boulders and rocks forming walls and numerous ledges around the site. the top 10m/30ft is heavily covered by kelp but below that the kelp growth starts to fade. Once you reach around 18m or the 60’s the larger boulders start to turn to smaller rubble with a grade down to the surrounding sea floor which flattens out at around 21/70ft. The pinnacle is a bit longer running West to East, the North side being more of a gradual decline and the South Side being more of a steeper drop to the bottom. The boulders form beautiful valley’s and crevasses to explore and pass through over small sandy pathways in between towering stone walls. The lobster are plentiful if you have the eye to spot them and below 12m/40ft the fish start to gather. Cunner of all sizes, some quite big and a few tautog can be seen congregating around the slope of rubble and under the overhangs of the larger rocks. Tewksbury rock even has been known to have been known have some scallops scattered deep at the bottom around the pinnacle. Visibility can clear up nice towards the bottom, a nice 20ft range of vision is always welcomed around here. The hazards of this area are primarily current, you’re past all the harbor islands so there’s not much to break up the tidal flow or wind on the surface. The exposure can make it pretty nasty with weather and seas coming from the East but if you wait for a calm day and slack tide you’ll have the most ideal conditions. All in all this is a fantastic site for pretty much all you could want out of a New England dive, topography, lobster, fish, depth and some decent viz most of the time.
-Capt Greg
