snorkelling in bahamas in Feb

Hi ,hope this is in the right place as Im new to the site - and cheating really as Im the only one in the family who only snorkels rather than dives.

Anyway, in the past we have had hols in the caribbean in the summer and it was great. We now want to get away from the UK weather in Feb/march and have thought of returning to the Bahamas. ( As I look out of the window there are flakes of snow!) I know that compared to home the air temperatures will be great.
But Im not convinced that the sea water is really warm enough or calm enough for snorkelling or that visibility will we good enough to make it worthwhile.
Help please.