Dove this site for the first time in August due to high E.coli counts at the usual north shore sites at the time. We dove close to slack (high tide) and still had pretty notable currents - be sure to dive as close to slack as possible if you don't want to kill yourself fighting currents! Surface swam out to the Southwest tip of Grey Rocks island and dropped, but it was too shallow (20-30ft) and nothing but boring sandy bottom there. We resurfaced and tried again off the southeast corner of the island just past the dock and got better depth, but things only got interesting once we had started looping around the northeastern side of the island. There's an old concrete pipeline there that's got a lot of life, as well as scattered rocks around 50-80ft with crabs, anemone, shrimp, and a variety of fish (saw flounders and a big ling cod). If we were to dive this site again we'd stick very close to slack tide and dive the northeastern side of the island - once we got into the right area we quite enjoyed ourselves!