Anonymous wrote:OP, you are not very far from Oxford and St Michaels.
The further north you go the less likely you will see jellyfish.
Oxford is on the Tred Avon River. To the right of the ferry is the town beach. You can check that out and swim there.
Generally there will be a few families swimming there. It has a white sandy beach.
St Michaels is even further north on the Miles River. You can take the ferry from Oxford to St Michaels. The Miles River is pretty far north and less of a chance of jellyfish this time of year. I've swum in the town harbor there when we've anchored. There has got to be some public swimming areas but I'm just not sure where they are in the St Michaels/Miles River area.
+1
True of all salt water, as jellies favor warm ocean water.