The water temp 2 weeks ago was around 80. It rained every day while we were there, mostly in the mornings and night it never affeccted us in any way. Not sure if there is much difference around the xmas timeframe.
One thing to keep in mind if this is your first trip. Because of the elevation differences between sea level and windwardside (i'm assuming that is where you're staying), there can be a considerable temp difference. The nights got pretty cool, if you're prone to be cold you'll probably need a jacket or sweater (my gf did). Between the cool air, the rain and the frogs around our cabin, it made for great sleeping.
A comment about your original question about the depth: The 4 pinnacles are deep dives, starting out between 80 and 100 feet, we did 3 of the 4 while we were there. We had a couple people who just hung on the line around 60', because the viz was good, they still had a pretty good show with the sharks. All the other dives could be done at pretty much any depth you choose.
One thing to keep in mind if this is your first trip. Because of the elevation differences between sea level and windwardside (i'm assuming that is where you're staying), there can be a considerable temp difference. The nights got pretty cool, if you're prone to be cold you'll probably need a jacket or sweater (my gf did). Between the cool air, the rain and the frogs around our cabin, it made for great sleeping.
A comment about your original question about the depth: The 4 pinnacles are deep dives, starting out between 80 and 100 feet, we did 3 of the 4 while we were there. We had a couple people who just hung on the line around 60', because the viz was good, they still had a pretty good show with the sharks. All the other dives could be done at pretty much any depth you choose.