people swimming near shore with waves during daytime

Oʻahu

Waikīkī's beaches, Pearl Harbor history and the drive to the North Shore make Oʻahu a practical first island for a Hawaii trip.

Find a room in Oʻahu Start with the essentials Plan a trip to Oʻahu

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Oʻahu is the third-largest island in the Hawaiian Islands and the most populated, part of the state of Hawaii in the United States. Honolulu, the state capital, sits on its southeastern coast. The island is nicknamed The Gathering Place, and its best-known places include Waikīkī, Pearl Harbor, Diamond Head, Hanauma Bay and the North Shore. It is about 44 miles (71 km) from east to west and about 30 miles (48 km) from north to south.

Waikīkī, the main tourist center on the south coast, has about 90% of the island's hotels and a beach for sun, swimming and surfing. Pearl Harbor, a bay west of Honolulu, is mostly a US naval base, and the USS Arizona wreck there is a war memorial. ʻIolani Palace, built for King Kalākaua, is the only royal palace on American soil. Temperatures stay about 70 to 85°F (21 to 29°C) year-round, and the island is warmest from June through October. Choose your base first, then decide whether you need a rental car to reach the coast.

Oʻahu in five

Reserve Diamond Head before you flyHawaii State Parks requires entry and parking reservations for non-residents at Diamond Head. The park is open 6 AM to 6 PM, with the last reservation at 4 PM, and is closed Christmas and New Year's Day.Diamond Head, Hanauma Bay and Pearl Harbor
Pick the south shore, Kailua or the North ShoreWaikīkī suits first-timers who want restaurants and transit, Kailua is a calmer Windward base, and the North Shore is surf country with limited rooms. Each has a different driving plan.Kailua
Rent a car for the island loop onlyWaikīkī is walkable and well served by buses and rideshare. Rent a car for the days you drive the Windward coast and North Shore, and check parking costs at your hotel first.Getting around the USA
Plan Pearl Harbor as its own half-dayPearl Harbor sites have their own reservations and security rules, so book through the official sites and keep the rest of the day light.How many days in Honolulu
Check surf and ocean conditions every dayNorth Shore surf is largest in winter and calmer in summer, and rip currents occur on every coast. Follow lifeguard flags and posted warnings before you swim.

Things to do in Oʻahu

See all attractions in Oʻahu

Landmark · OʻahuKaneana Cave (Makua Cave)Bring a flashlight if you want to see into the darker spaces.

Sight · OʻahuAlexander & Baldwin Building

Historic site · OʻahuKu’ilioloa Heiau

Free trip plannerPlan a trip to OʻahuPut the places you like in Oʻahu on a map, give them days, and let one button order each day. Free, with no account.Plan a trip

Need to know

Airport: Daniel K. Inouye (HNL), about 20 to 30 minutes from Waikīkī
Getting there: Fly to Honolulu; inter-island flights link the other islands
Getting around: TheBus, rideshare and walking in Waikīkī; a car for the coast
Best base: Waikīkī for first trips; Kailua or the North Shore for calmer stays
Time needed: 4 to 7 days

Weather by month

Rainy days

Best
Good

JanuaryPartly cloudy9 rainy daysHigh25°Low18°Warm, big surf north
FebruaryRain12 rainy daysHigh24°Low18°Warm, whale season
MarchRain13 rainy daysHigh25°Low19°Warm, spring break
AprilRain14 rainy daysHigh25°Low20°Warm, drier
MayRain13 rainy daysHigh26°Low20°Warm, calm seas
JunePartly cloudy9 rainy daysHigh27°Low21°Hot, calm
JulyPartly cloudy7 rainy daysHigh28°Low22°Hot, busy
AugustPartly cloudy10 rainy daysHigh29°Low22°Hot, busy
SeptemberPartly cloudy9 rainy daysHigh29°Low22°Hot, quieter
OctoberRain13 rainy daysHigh28°Low22°Warm, quieter
NovemberPartly cloudy8 rainy daysHigh26°Low21°Warm, rain returns
DecemberPartly cloudy10 rainy daysHigh25°Low19°Warm, holidays

Average daily high and low in Honolulu, 2016–2025. Rainy day: 1 mm of rain or more.

Right now in Oʻahu

Local time, today's weather and the exchange rate, refreshed through the day.

Feels like: 21°
Humidity: 93%
Wind: 20 km/h
Chance of rain: 100%

Oʻahu

10:36 AM

Monday, November 2

GMT-10

Today24°20°100%Monday: Drizzle. High 24°, Low 20°. Chance of rain 100%.
Tue24°20°92%Tuesday: Drizzle. High 24°, Low 20°. Chance of rain 92%.
Wed24°21°98%Wednesday: Drizzle. High 24°, Low 21°. Chance of rain 98%.
Thu25°20°90%Thursday: Drizzle. High 25°, Low 20°. Chance of rain 90%.
Fri25°20°83%Friday: Drizzle. High 25°, Low 20°. Chance of rain 83%.
Sat23°20°67%Saturday: Rain. High 23°, Low 20°. Chance of rain 67%.
Sun24°20°78%Sunday: Drizzle. High 24°, Low 20°. Chance of rain 78%.

Updated 07:44 AM local time · Weather data by Open-Meteo.com

Money

Mid-market rate1 EUR = 1.116 USD

Amount

Converted to

USD · US Dollar

Rates from Nov 2, 2026 · Rates By Exchange Rate API

Day trips by train

Day trips from Oʻahu, the full guide

Pearl Harborabout 20 to 30 minutes from WaikīkīA timed-entry memorial visit; book through the official site and allow a half day.Read the guide
North Shoreabout 1 hour from Waikīkī by carSurf beaches and food trucks, best on a weekday to avoid traffic.
Kailua and Lanikaiabout 30 to 40 minutes from Waikīkī by carWhite-sand Windward beaches, quieter than Waikīkī.Read the guide

Before you go to Oʻahu

Waikīkī, Kailua and North Shore staysChoose by driving plan and beachCheck availability

Pearl Harbor, Diamond Head and toursTimed entries and island circle toursCompare day trips

eSIM for OʻahuMaps and ride apps on the island loopRead the guide

Insurance for a Hawaii tripInter-island and flight-delay coverRead the guide

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Rules for Oʻahu, checked

Diamond Head State Monument: non-residents need entry and parking reservations; open 6 AM to 6 PM, last reservation 4 PM, closed Christmas and New Year's.Checked Oct 2, 2026 · Source

Plan around Oʻahu

Where to stay in Honolulu

Waikīkī and the nearby areas compared

Read the guide Diamond Head, Hanauma Bay, Pearl Harbor

Reservation rules for Oʻahu's top stops

Read the guide How many days in Honolulu

A plan for a first Oʻahu trip

Read the guide Kailua

A Windward beach town across the Koʻolau

Read the guide Maui

A second island with Haleakalā and Hana

Read the guide Hawaii overview

All the islands and how to choose

Read the guide All of the USA

States, parks and cities in one planning hub

Read the guide

Oʻahu FAQ

How many days do you need on Oʻahu?

Four days covers Waikīkī, Diamond Head, Pearl Harbor and a day around the island. A week adds the North Shore and a beach day, and gives room for weather changes.

Do you need a reservation for Diamond Head?

Yes for non-residents. Hawaii State Parks requires entry and parking reservations for non-residents, and the park lists a 6 AM to 6 PM schedule with the last reservation at 4 PM. Book before you fly.

Do you need a car on Oʻahu?

Not in Waikīkī, which is walkable and has buses and rideshare. Rent a car for the Windward coast, the North Shore or Kailua days, and compare parking costs with day-tour prices.

Where should I stay on Oʻahu?

Waikīkī for the first trip, Kailua for calm beaches, the North Shore for surf and a rural feel, or Ko Olina for lagoons. Choose the base that matches your daily plan.

When is the best time to visit Oʻahu?

April, May, September and October bring fewer crowds and calmer seas. Winter has the biggest North Shore surf and whale season, while July and August are busy and hot.