

we are in the very early planning stages of making our first ever trip (first ever to hawaii too!!).
so we are just now looking at the best time/month to go.
our main focus will be the water activities and we are not fans of chilly weather or water.
although I am going to research any available sightseeing trips and very hot weather might not be best for sightseeing excursions.
but I"m such a newbie that I don't know what to consider.
please help?
Do we go when it is warmest to get great beach weather? or something more temperate in case we sightsee?
Do I need to consider crowd levels? yes- see- I need any advice you can give

thanks in advance!