O'ahu Island Facts Size: 597 Square Miles Length: 30 miles Width: 30 miles Coastline: 112 miles Populatio: 953,207 Main Airport: Honolulu International Airport (HNL)
Weather Temperature ranges High/Low (F) January-April 81/66 May-August 86/72 September-December 85/70 Average 84/69 Ocean Temperature 71 to 81, year-round
Time Zone Hawai'i Standard Time Zone is GMT-10 (Pacific Standard Time -2, Eastern Standard Time -5). Since Hawaii Doesn't observe daylight savings time, add one hour to the time difference when in effect (March through November). Transportation Rent a car at Honolulu International Airport (HNL) to explore the island. Other options include tour buses, shuttles, trolleys, taxis or city buses.
Clothing Dress casually. Bring a light jacket for nights. Semi-casual dress clothes for restaurants and nightlife. Suits and ties are rarely worn.