For a prime visit to Oahu, consider planning your trip between mid-April to early June or from September to mid-December. These shoulder seasons offer less crowded attractions, abundant festivals, and reduced airfare and accommodation rates. Oahu enjoys comfortable temperatures in the mid-60s to high 80s year-round, with a marked decrease in rain showers from mid-June to August- attracting tourists eager to take advantage of sunnier skies. Keep in mind, however, that surfing season is in full swing between late December and early April. This peak tourist period brings in surf enthusiasts and spectators, bolstering demand and prices.