I played the Ocean Course the day after Christmas a couple years ago. It was 38 degrees, raining steadily with a bit of a breeze and I was the only person on the course that day (except for the caddie accompanying me). Driving range through the tee shot on fifteen it never quit raining yet I only had one or two casual water situations. Otherwise, the fairways were reasonably firm and in immaculate condition, the ball generally sat up nicely. The waste-area "bunkers" are quite easy to play from in the rain as the sand packs down nicely and you are allowed a practice swing.
I played again the next morning, we had a delay until something like 10.30am because the temperature was in the upper 20's that morning (there was a skim of ice on a couple of the water features, quite a rarity according to the caddie) but as soon as it cleared 32 degrees they let me out on the course and it was a crisp, glorious day of sunshine and light breezes. There was virtually no sign of the 2+ inches of rain from the previous day.
In winter, the Paspalum greens are fabulous. They are a beautiful golden color and putt very true IMO. I found the green surrounds (closely mown) to be firm enough but a little bit "sticky", which others have complained about with the Paspalum. The caddie said chipping and bouncing the ball onto raised greens is tougher to judge in the winter but the greens are a touch slower which makes up for it.
One advantage to the Ocean Course for winter play is that because of its situation it is designed to remain playable in high winds. So the normal winter breezes don't cause lost balls at the same rate you might expect on a narrower beach resort course. Moving up one set of tees is probably key as there are a few tee shots that would be very daunting with the cold sapping your driver carry distance and the prevailing NE or E winds narrowing down the targets.
In sum, highly recommended. I wish I could afford to go there this winter.