Figure the first 1-1/2 days going and the last 1-1/2 days coming back where it could be very cold. As for the Bahamas, obviously it really just depends on the weather you encounter and no one can predict that. But February is their coolest month of the year and it can get down to 60 at night and up to about 75 during the day - not hot, but definitely warm compared to NY. Last time we were down there during the Winter, we found the water a little chilly, but swimmable.
Travel Agent/Cruise Specialist w/13 yrs exp and 48 Cruises on 11 cruise lines! Favorites: Paul Gauguin - Tahiti: Uniworld River Cruises - Europe; Celebrity Solstice-class ships; Holland America - 12-nights Baltics & Russia; RCCL - 14-nights Greek Isles, Turkey, & Croatia; Holland America - 14-day Alaskan cruisetour; 10-night Canada/New England cruise; 21 days Hawaii w/7-night NCL cruise; Oceania - 25 days in Asia; more than 3 months touring Europe by train. And many all-inclusive resorts!