While the inclination is to visit Hawaii in the winter to escape the winter weather on the mainland, it's actually not the time to find either the best weather or the best bargains.
Hawaii has a dry season April to October and a rainy season November to March. In recent years, however, even the rainy season has been very dry. The best weather is often found in April, May, September and October. These are also the months when you can find some good travel bargains. Airfare and lodging tend to be more expensive during the "high" season of mid-December to mid-April. If you plan to visit during this period, make your reservations early. The summer can be hot and humid and the kids are out of school so things can get a big crowded at the beaches.
The last week in April and first week in May are very busy in Waikiki. This is the peak season for visitors from Japan due to the Japanese "Golden Week" holidays. Unless you plan to attend the Merrie Monarch Hula Festival, you should avoid the Hilo area of the Big Island during the week after Easter. The Ironman Triathlon in October makes the Kona area of the Big Island very busy also. Hurricanes are rare but the hurricane season is from June to November. The last major hurricane to hit Hawaii was Hurricane Iniki, which severely damaged Kauai in September 1992. The water temperature in Hawaii is very consistent. The year-round average water temperature is a warm 74 degrees. It can reach 80 degrees in mid summer. If you want to see big surf the summer is not the time to go to Hawaii. Even Oahu’s famous North Shore waves are very tame. Winter is the time for the big surf in Hawaii.
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