Waikiki in January

April, May, September, October, and November give you the sweet spot — fewer crowds, lower hotel rates, and weather that's still perfect. Ocean temperatures hover around 77°F year-round, so you're never dealing with cold water. Avoid December through March if you can. Hotel rates double, beaches get packed, and you'll wait 45 minutes for a table at decent restaurants. Plus, this is when the North Shore gets its big waves, which sounds cool but actually makes some beaches too rough for swimming. Summer (June-August) brings the calmest ocean conditions, perfect for kids and nervous swimmers. But it's also peak family travel season, so expect Disney World-level crowds at popular spots like the Honolulu Zoo and Diamond Head.