Normandy/Brittany is a short hop across the channel. The Baie de Seine, runs more or less from Barfleur (recommended) to Le Havre. Loads of boating opportunities, easy launches from pretty fishing ports. D-Day beaches, islands, good fishing, more good restaurants than you can shake a stick at. The west side of the Cherbourg peninsula offers miles of empty beaches, the Channel isles for a day trip, yet more good eating, the port of Dielette has good launching & a marina. If you want to go further down, then Morbihan is supposed to be excellent for boating, virtually an inland sea with hundreds of islands, I've never been so can't comment.
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: See rule#5