The thing I love about the outer Cape, is how warm the water is on the bayside. From about Brewster (perhaps just west of there too) to Wellfleet has some of the warmest near shore water you can imagine. It's so shallow there, so it bakes in the sun. Plus there are tons of little lazy river features where you can plop your float in one of the marsh rivers and gently flow in and out depending on the tide. You have the amazing bike trails too for biking, running etc. Lots of various outdoor activities other than the beach and obviously the seafood. Epic sunsets there. It took me until 2016 to appreciate this.
This was back in 2016. Just incredible sunsets and to me, something so close that seems so far.