A lot can account for it...including:
different exercise AND activity level
change in sleep pattern
different diet (poss. more sodium, or more carbs/ sweets, or more alcohol)
drinking more water or retaining
change in medication
all of this could be temporary...and should
sort out in a short while.
P.S. now that you're in Hawaii, inevitably, that might mean you're eating more fruit. More fruit can cause weight gain from water retention..and causes bloating.