Things to do in Oahu When It's Hot Outside

A green sea turtle in the waters of Hawaii

Hawaii is hot in every sense of the word: its warm climate makes it pleasant to visit year-round, which in turn makes it one of the planet’s most popular tourist destinations, pulling in around eight million visitors every year. The majority of Hawaii sunseekers (around five million, give or take) wind up on the island of Oahu, home to some of the state’s biggest attractions – Pearl Harbor, Waikiki Beach, Honolulu and the Diamond Head volcano, to name just a few. It goes without saying then that there’s plenty of fun to be had in the sun here. After all, no-one goes to Hawaii for its skiing opportunities, right? But with summer temperatures that average way up in the high 80s, you’ll likely want to pencil in a few slightly cooler activities (as well as covering yourself top to toe in factor 50, natch).

Here, then, are a few ideas for things to do in Oahu and Honolulu when it’s hot outside, including:

  • Beaches!
  • Snorkeling!
  • Catamarans!
  • Pineapples!
  • Shave ice!
  • And more!

Keep Your Cool on the Beach

Woman splashing in the sea at Waikiki Beach

You’ll want to pack plenty of beach bag essentials for your day at Waikiki, Hanauma Bay, the North Shore and, well, whichever of Oahu’s stunning tropical beaches tickle your fancy. We’re talking UV sunglasses, great big floppy sun hats and gallons of bottled water as a bare minimum. You may want to add a parasol or tent for use in some of the more exposed bays, though you’ll also find plenty available to rent in the main tourist areas. Beaches like Lanikai and and Kailua on Oahu’s windward side (the east coast) tend to offer more natural shade, in the form of palm trees. Top-tip: before slinging your towel down underneath, check carefully for the very real and present danger of ripe coconuts up above. You’ll be cooling off in A&E if one of those beauties drops on your nut!

Waikiki Beach is of course the most popular of Oahu’s beaches, and opportunities to cool off on snorkeling trips here abound. Cruise out onto the beautiful clear blue waters and come face to face with all manner of tropical marine life. You’re all but guaranteed to meet green sea turtles at the aptly named Waikiki Turtle Canyon.

Sunrise beneath the palms at Kailua Beach

Hanauma Bay is where it’s at for some of Oahu's most spectacular sealife selfie opportunities. Vibrant yellow tangs and flamboyant spinner dolphins are just two of the cute critters you might spot on snorkeling excursions to the thriving coral reef that lies in the cone of this long-extinct volcano.

Hit up the pristine sands of Lanikai Beach for more of the same (but with added palm cover), and crescent-shaped Kailua Beach (pictured above), where balmy trade winds encourage other watery pursuits including kitesurfing and kayaking.

Oahu’s Hottest Tours

Hawaii pineapple plantation

If you simply can’t bear to spend all day lounging in the shade of a coconut palm, moving only to top up your rum-laced Mai Tai cocktail, there are plenty of island tours you can take around Oahu and Honolulu on hot days instead. Here, after all, is an opportunity to see this beautiful volcanic paradise from the lush cool confines of an air-conditioned coach. Try a trip to the Dole plantation on the North Shore. Sampling the sweet flesh of their world-famous pineapples under the hot Hawaiian sun is one that’s worth disembarking the refrigerated coach for, and no mistake! You could also take a tour of Oahu’s hidden gems, including tranquil temples, shaded Japanese gardens, and the cooling spray of epic blowholes like Halona. Or immerse yourself in rainforests and visit the 150-foot Manoa waterfalls, passing through jungle scenery used in The Hunger Games movie series.

You can book tours including all of the above (and more) with an Oahu pass from Go City, which can save you up to 50% on top attractions, tours and activities on Oahu. Find out more and bag your Oahu pass here.

Ice Cold in Oahu

Lady with a colorful shave ice in Hawaii

Hawaii is arguably as famous for its shave ice as its beaches, volcanoes and hula skirts. Find out what all the fuss is about at any one of dozens of purveyors of this frozen treat across the island. Shave ice is exactly what it sounds like: tiny shavings of ice liberally doused in lashings of fruit syrup, and boy is it refreshing on a hot day. Get yours from North Shore shave ice stalwart Matsumoto’s. A fixture on Oahu since the early 1950s, its natural lychee, passion fruit and yuzu flavorings are some of the best in Hawaii. Other local favorites include Ululani’s and Shimazu – for all the ice-cold refreshment but without the half-hour lines. Top tip: it’s ‘shave ice’ not ‘shaved ice’, so be sure to sidestep any vendor that didn’t get the name right on their signage.

Life on the Ocean Wave

Oahu whale-watching boat tour

Feel the sea breeze on your skin aboard a catamaran or luxury yacht as you tour the Oahu coastline in style. This is a fine (and crucially effortless) way of seeing a bit more of the island and perhaps even ogling the odd humpback whale, flying fish or green sea turtle on your travels. Don your floppiest sun hat, slather on the sunscreen and sip a glass of prosecco on deck-o as you cruise past jungle-clad mountains and over the coral-rich depths of Oahu’s submerged volcanic cones. Take your pick from straightforward catamaran excursions to decadent day trips that include lunch, snorkeling, and bottomless bubbly. You can access a variety of superb sea-faring options with the Go Oahu pass.

Oahu’s Coolest Hikes

Bird of paradise flower in Hawaiii

Ok ok, so hiking may not be the first activity that springs to mind when it’s hot out in Oahu, but bear with us. The botanical gardens at Waimea Valley are a 1,875-acre oasis of lush plantlife and great fronds of greenery. Shady groves and a cooler climate make the gardens ideal for strolling, even when the tropical sun is at its most punishing. Meander gently through some of the park’s 52 themed zones, where towering cacti and fresh-scented hibiscus flourish, and where the picture-perfect Waimea Falls provide ample opportunity for cooling off should the heat get too much.

Hiker at the snowy summit of Mauna Kea in Hawaii

Alternatively, hop across to Big Island, home of Mauna Kea, the highest peak in Hawaii. Hikes to the summit commence from the visitor center, 9,200 feet up, where you’re all but guaranteed freezing temperatures and possibly even snow. But be warned that this 12-mile round-hike is not for the faint of heart, with challenging terrain and the threat of altitude sickness the price of evading the Hawaii heat way up here.

Save on Oahu and Honolulu Activities, Tours and Attractions

Save on admission to Oahu attractions with Go City. Check out @GoCity on Instagram for the latest top tips and attraction info.

Stuart Bak
Stuart Bak
Freelance travel writer

Stu caught the travel bug at an early age, thanks to childhood road trips to the south of France squeezed into the back of a Ford Cortina with two brothers and a Sony Walkman. Now a freelance writer living on the Norfolk coast, Stu has produced content for travel giants including Frommer’s, British Airways, Expedia, Mr & Mrs Smith, and now Go City. His most memorable travel experiences include drinking kava with the locals in Fiji and pranging a taxi driver’s car in the Honduran capital.

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Go Oahu pass Review - My Wonderful 5 Days in Hawaii

This Go Oahu Card review was submitted by Lisabeth F, as part of our Blog Ambassador Program - a fun way to visit top Oahu attractions for free, share your experience, and be featured on our blog. [clear-line] I used the 5-day all-inclusive Go Oahu Card to create a relaxing, stimulating, and exciting vacation itinerary that allowed me to experience some of the best that Oahu has to offer. Some of the activities I enjoyed are exclusive to Hawaii, and the trip was even better than I had imagined! The Go Oahu card made planning and getting passes to the attractions a breeze, and I saved plenty of money if I were to purchase admission to each individually. My 5-Day Go Oahu Vacation and Itinerary I planned my 5-day Oahu vacation and itinerary to make the most out of the many different kinds of attractions and activities that Honolulu and the nearby areas has to offer. By scheduling a mix of relaxation, excitement, and historical tours, I was able to get a true taste of tropical Hawaiian adventure, aloha, and history. Convenient, practical, and budget-saving, the all-inclusive pass made my itinerary super easy to plan and follow. I never had a problem using the pass, and I received wonderful treatment wherever I went. I flew into Honolulu in the afternoon, picked up my rental car, and headed to my hotel in Waikiki. You don’t necessarily need a car to follow my particular itinerary, but traveling to and from the attractions takes about half the time with one. I scheduled my 5-day itinerary to include... a sunny, relaxing Makani Catamaran Sail a fun-filled Dolphin Encounter at Sea Life Park the informational and leisurely Pearl Harbor Historical City Tour and an emotional and insightful visit to three Pearl Harbor memorials- USS Arizona, USS Bowfin, and USS Missouri Take a virtual mini-tour with me, and I’ll tell you all about it. Pearl Harbor Memorials Day 3 brought an early breakfast and a trip out to Pearl Harbor to relive a day of infamy in Hawaiian and American history. The World War II Valor in the Pacific National Monument includes the USS Arizona Memorial, the USS Bowfin Submarine, and the USS Missouri. I knew a visit to the USS Arizona Memorial was included with the Pearl Harbor Historical City Tour, so I saved that for the following day, and took self-guided tours of the USS Bowfin and the USS Missouri. I didn’t need to make reservations for either tour, and instead of exploring them on separate days I toured both ships while I was there. Pearl Harbor Historical City Tour The Pearl Harbor Tour was a perfect way to wrap up my planned itinerary. I had to be at my pick-up location at 8:30, so I grabbed a quick breakfast at the hotel buffet and was on my way. The driver was knowledgeable, friendly, honest, and forthright. I have to say, this was the real deal, with inside information you wouldn’t normally hear from a corporate tour guide, along with all the standard historical facts. The bus was comfortable, quiet, and smooth. More Stops Around Honolulu Fittingly, the next stop on the tour was Punchbowl Cemetery, where generations of military members rest in peace on the heights above Honolulu. From there, we went past most of the more well-known landmarks of Honolulu, including Hawaiian palaces, government centers, and the Eternal Flame War Memorial before returning to our relative destinations around 3:00 pm. The Flexibility of the Go Oahu Card I chose to leave day 5 wide open for a little flexibility in my itinerary and whatever I felt like doing that day There are many different options to choose from, so it’s all up to you how you spend your time, but no matter what you do the Go Oahu card makes it well worth it. My Tips for Planning Your Itinerary Using a Go Oahu Card Accessing the pass onto your smartphone makes getting into the attractions easy, and will ensure you always have your passes with you. Many of the attractions require reservations, so call ahead of time to book your slot. When making reservations, make sure you are prepared to give the number of persons in your party, mention any children and their ages, and have your Go Oahu pass numbers for all members of your party handy. Browse each attraction’s website beforehand to familiarize yourself with the attraction and any rules and recommendations. Give yourself more time than you think you need to visit each attraction. There are often more activities nearby or within the attraction you’ll want to explore. Plan on getting something to eat or drink nearby before or after each attraction. Activities make you hungry! I hope my Go Oahu Card review helps convince you that the pass is well worth it! The savings alone are reason enough to purchase the pass, but I specifically liked the ease of use from my iPhone. And, since so many attractions are already included on the pass, I really enjoyed the freedom to do, or not do, the attractions that are available to visit.
Lindsay Eagan

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