port antonio is beautiful. am biased; uncle used to man the power station. most run to frenchman's cove but it certainly isn't - well, i'll just say that it looks a bit different now. definitely still worth a visit for the cold water/warm water experience alone. folly ruins, boston jerk centre, boston bay, devon house ice cream, coconut jelly a roadside for $100 JA...if it was the first week of july, you'd get to experience the jerk festival over folly great house.

a "day trip" from negril? to portie? lol are you flying? otherwise, if you literally mean a "day trip" as in leave, reach ova desso, tarry and then drive back to negril? that would not be worth it IMHO. would probably enjoy the drive on the north coast (especially from oracabessa or so) though through galina, port maria, anotto bay, buff bay, etc. really lovely and peaceful drive until you go inland some.