No matter what comforts technology might bring, I prefer to stay on the sandy part of the beach from September to May.
And, let's face it, the gulf stream misses this part of Maine entirely. July might bring a lucky storm that pushes warmer water into the gulf. I'm usually optimistic about August being swimmable, and even then you don't want to be out there too long without a wetsuit.
Cruel as it might seem, the best surfing comes in winter. Like odd red-faced buoys bobbing offshore, the fully equipped and dedicated surfers head out to their exclusive breaks. Inch-thick wetsuits, hoods, boots and mitts and you might still have the agility to catch a wave. I am more suited to terrestrial pursuits this time of year.
I also have much respect for the few birds in the area that don't migrate. I'm sure they have slight distain for those who choose to be the proverbial snowbird.
The beach pretty much to yourself on a chilly morning is one of the many small pleasures of Maine in deep fall and winter. Bundle up and enjoy.