Hi, we are going on the eastern magic 7 day leaving dec. 28 and are concerned about air and water temperatures. we have been 3 times, but always in summer. we really want to snorkel at trunk bay in st. john and on catammaran trip at st. martin. has anyone been over christmas, new years and what was the water like? what kind of special events do they have on new years? thanks for your help. barb