Love that!
We just got back from a 10 day camping trip at the beach (Cape Cod), timed intentionally for when dogs are allowed on the beach in the off season (generally mid-Sep to Apr). And bonus, some days we had the beach almost entirely to ourselves! Ok so the water was only 69° but hey, that's almost 10° warmer than average this late in the season, and we had temps in the 70s so it was lovely for this NH girl.
And yes, I brought a suit and went swimming.