Weather in Hawaii in December is about like the weather the rest of the year, except maybe 5 degrees cooler and maybe rainier, depending on where you are on each island. Winter is usually the rainy season on the windward sides of the islands.
The air temperature all winter will be between 75 and 85 degrees F, and the ocean will be 72 degrees Farenheit, totally swimmable. And everybody will be swimming. It’s definitely hot enough to swim in the ocean in hawaii in december.
If you stay on the southern or leeward (western) side of any island rain usually isn’t an issue, and it will still be in the 80’s (farenheit) most days. It usually doesn’t get too far into the 90’s even in summer because of our nice ocean breezes.
Where would I suggest you stay in Hawaii in December in order to get the best weather? Kailua-Kona on the Big Island or Puako on the Big Island, Kaanapali or Kihei on Maui, Honolulu or at the new Disney resort on Oahu, or Poipu on Kauai are all great choices – western or southern sides will be hot and mostly dry, even in December.
The original question i originally went on line trying to find out what the weather is like in december. does this vary by the island? we probably would prefer to stay at a resort type hotel, we are not the volcano types. could you present us some thoughts as to locations.