This is the high season for Sharm Elsheik and Hurgada, the westerns mostly prefer to go in this time specialy Italians and in general the weather there will be warm in the morning and around twenty celsus deg. at night.
This resorts town is mainly for diving and snorkling to injoy watching corals and coloured fish, so in the summer and winter time if you are easly feeling cold of sea water specialy in deep water with mild currents you can wear the half or full swimming suits like the divers and wind surfers and they are available in different degrees of water insulation.
They have a huge variety of suits there or you can take your own from local market here.
About kids they can go and they will injoy it there.