Tide Me Over will be open, certainly. There will be activities, as usual, just check with the recreation CMs. While swimming in the ocean isn't really possible, you can obviously still walk the beach. As for swimming in the pools, both the main pool (Big Dipper) and the Beach House pool are heated to 84F throughout the year. If the "feels like" temperature is below 50F, then the Big Dipper pool won't allow swimming...however, the Beach House pool is open for swimming regardless of temperature as it is a non-lifeguarded pool. Another little known fact is that UberEats, DoorDash, etc. will deliver to the Beach House should the food service there be closed. Have a great trip!