Had a few swims, and the water was really warm for Tasmania. Lovely place, well worth a visit. Walking north along here you could probably get to Bicheno. There might be some tricky rocky sections as you approached Cape Lodi. A few kilometres north of Isaacs Point (where the road accesses the beaches) you come to what appears to be private property. There were trail bikes, 4WDs and a shack/campsite here. A walk to the south might be better, and next time I'll try that.
These bluebottles (PDF, 1MB) (Physalia utriculus, I believe) were washed up all along the beach. Didn't strike any in the water, just lucky I guess.