While Hawaii is a great destination year-round, the best opportunity for good weather exists during April, May, September, and October. As the tradewinds pick up over the winter months, so do the showers, and surf swells, particularly on the north/northeast (windward) shores of each island. The weather is warm year-round, with average highs in the winter of 78-82ºF (26-28ºC) and 83-88ºF (29-31ºC) in the summer months. Learn more about Hawaii weather.
Best Time to avoid crowds?
Hawaii has visitors during all months of the year, but typically, if you want to avoid the crowds, visit in either November (excluding Thanksgiving) or May for the quietest scene on the islands. Additionally, the first week of June, most of April (excluding ‘Golden Week’ and Easter), and much of September or October are great times to avoid the majority of visitors.