Yes slack tide at Fort Adams. Beavertail is a lot of work, it is a nice dive however. All along Ocean Drive there is access to the water. You'll see people from rocks fishing. Those same rocks can be an entry point for a dive. I dive those sites when I need more lead for casting bullets, tons of lead sinkers all over the place. The water is shallow but no boats and very little current. Ocean Drive is the road Kings Beach and Green Bridge are on. West's Cove at Ft. Wetherill is a steep hill and rocky entry. Bull point has a shorter but steeper hill with 1' dia. rocks to walk on. New England is a tough place to shore dive. It is a place where youth is required for most shore diving sites. Look at FTW it's mostly old geezers like me or student divers, because it's one of the few easy entry and exits sites in the area. One does not see the walking heart attacks diving sites like Beavertail or even old divers like me that are in fair shape for that matter, it's just too much. You might want to check Giant Strides charter schedule for diving the U853 Red has several charters per year to the sub. It is a unique diving experience and it is close enough to the Gulf Stream in the summer to attract unusual life for this area. Dolphins have been seen at the sub, as well as Mola-Molas.
The way things are going I'm expecting Great White sighting to start being reported at the sub soon. Evidently one was tracked at the seawalls off Pt. Judith this past summer, that's closer than the sub.