Oahu schedule...to much, not enough, just right?

It has been awhile but I think 12 hours at the PCC is too long. I would get there in the afternoon if you are staying for the evening luau. Pearl Harbour area might be a good choice for the morning. And then you have a couple of ways to get to PCC from there. Either take the North Shore route or take H3 that cuts across to Kaneohe.

Some of those days look full!!! But I'm a weirdo and like actual beach time when I'm there. We go to Hawaii 3 times a year and Oahu can take a bit of time to get around because of traffic and during high tourist season it's worse. So if you're going during summer, allow MORE time than you think you will need.

On your first day, I personally think you should scale back because you'll have a long flight and time getting luggage and then to your hotel. Where are you staying? When you say dive, do you mean scuba? I personally am a fan of getting into my hotel and not doing scuba on the first day. It's a good day to get a lay of the land so to speak and not worry about being somewhere at a certain time. That includes for catamaran tour.

Here is what I might suggest (as a couple who stays at the Royal Hawaiian in Honolulu frequently):

Day 1: Arrive at hotel and drop off luggage, hike diamond head, hang out at Waikiki beach, dinner at my favorite Japanese/sushi place EVER (and I've traveled through Japan) www.yelp.com/biz/tokkuri-tei-honolulu or at Side Street Inn for some local food (I think this is the place I'm thinking of) sidestreetinn.com/?utm_source=tripadvisor&utm_medium=referral

Day 2: Shark Dive/Catamaran Tour (honestly I think the catamaran tour is unnecessary if you do a shark tour or dive/snorkel boat trip) and then stand up paddle board in waikiki beach (BEST spot to stand up paddle in my life!). Then, go change in your hotel room, drive out to Mike's Huli Chicken (food truck parked on side of highway) to pick up some to go food and hang out at Lanikai Beach in Kailua for a couple hours. Don't wait too late in the day to do this as you won't find a place to park, particularly in heavy tourist season. This is the beach the Obamas used to vacation at when he was the president as he grew up in the area. It's a beautiful beach and Mike's Huli Chicken is PHENOMENAL. Just please be mindful of the undertow if you're not a swimmer.

Day 3: drive up to north shore first stopping along beaches you want to check out and then at the  classic and popular Matsumoto shaved ice top of the island (don't remember town name but it's quaint and fun to explore on foot) before working your way back down to the Polynesian cultural center and luau. It's not our favorite luau but it's worth attending and still something we encourage others to enjoy. Dole plantation is also between Matsumoto and PCC if you want to break your day up. We haven't done the plantation yet though we drive by it often. Some day!


Day 5: Obviously you would stand up paddle board, kayak, or swim one last time in the ocean at Waikiki beach.

Anyway, that's what I would do. Be sure to explore the Royal Hawaiian and/or Moana Surfrider Hotel since they are the original two hotels there. Iolani Palace is also cool to see but you'll be fine if you miss it.

Hope this helps. Holler if you have questions. Sorry for any poor spelling. Healing from surgery.

I would do the PCC the same day you’re on the North Shore. Logistically, you’re so close, it makes more sense to combine those events.

Check into your hotel first, they can hold your bags until the room is ready. You also don’t need a reservation for a catamaran tour, if you just head to Waikiki beach, there are a few boats that sit and wait, taking regular tours on walk up basis. The ones I know are directly in from of the Moana Surf Rider and Outrigger Waikiki/Dukes. I’ve spent many a day laying on the beach watching them come and go

I think your plan is more active than what I like to do on trip to Hawaii. But that is totally fine!

Regarding PCC - Will you be driving yourself? If not, check the times for the transportation and that will help determine how much time you will need. PCC is really planned around visitors spending the whole day there but not everyone does.

I wanted to comment on your last day. Your flight leaves at 1pm which means you should be at the airport by 11 to go through the agricultural inspection and then check in for your flight. Will you be returning a rental car at the airport too? For something that morning, I would say a walk along Waikiki beach would be lovely.

North shore are should include some time in Haleiwa for lunch!

We vacationed on Oahu in November and the traffic was surprising...we stayed at Aulani hotel and everywhere we went towards north shore, Waikiki, etc was a minimum 1 hr drive. Just be sure to account for that.
Please go eat at Monkeypod (farm to table) restaurant-we ate there 2 or 3 times it was so good!!
PCC, eh, I guess this could be all day...we were there maybe 2-3 hours and did not do the luau. We luau’d before tho.
Put Manoa Falls on your list....it is an easy hike and so beautiful! We did this hike after Diamond Head, which btw, hike as early in the morning as possible. It gets very crowded!!
We downloaded the Shaka app...narrated guide around the island that stops and starts when you do, using gps. It gave a lot of interesting info that we didn’t have to read up on ourselves.
Oh and our favorite activity was zip lining at Climbworks!!!! It was awesome, sooooo super fun. It rained a good portion of the time and we just kept going! The staff was amazing and we got a lot of great pics!
We did Pearl Harbor on a prior trip so skipped it this time. You will have so much fun!! The island is beautiful! I didn’t get to go but supposedly, Aloha Stadium has two days a week where you can get the popular souvenirs much cheaper than in the gift stores.

Another endorsement for the Bishop Museum and Iolani Palace. Just didn't care for PCC. Too commercialized perhaps. 
Pearl Harbor was a must for me. 

Overbooked. Find yourself some beach time.

For your first night, make reservations at sunset at Dukes for dinner.

PCC is meh. Maybe it's because we went there for the luau on our arrival day. Dunno. Not a place I'd go back to. We did the luau at Aulani, which I enjoyed much more. There's also one at Ko'olina called Paradise Cove. I've heard that some people love it, others, not so much.

I second what redshoes said above: hit the Monkeypod in Ko'olina (across the street from Disney's Aulani). Their mai tais, with honey-liliko'i foam, are to DIE for. Craving one at this moment.

Hawaii is our "downtime" vacation, so there is an awful lot of sitting around the pool and enjoying meals out. I agree with whomever above said, "More beach time."

Definitely need to rent a car; I wouldn’t feel safe on a moped as it is major highway (multi-lanes) travel to get most places.

The Arizona Memorial is still closed for repairs.

Visitors love The Aloha Stadium Swap Meet, which is very close to Pearl Harbor. It is open only on certain days, but you can find lots of bargains on t-shirts, snacks, and other knickknacks to take home.

I would suggest a rental car because the weather here can be vastly different from one side of a mountain to the other. I use to have to drive through one of the tunnels to get to work, and it could be sunny on my side of the mountain but raining as soon as I emerged on the other side. Please be aware that rental cars and tourists are prime targets at all of the scenic lookouts. Do not EVER leave valuables in the car, even if you think you will be outside taking photos for "just a few minutes". A "smash and grab" takes seconds. They often have a partner waiting in a getaway vehicle in the parking lot so they can jump in and take off.

Chief's Luau gets a lot of rave reviews from visitors. We bought tickets for my BIL and his GF when they visited last year and they thoroughly enjoyed it.

Your Day 4 seems packed. If you really want to relax and enjoy each activity, I would cut one of those out.

When driving, keep in mind that traffic here is HORRENDOUS. Peak hours are mornings until around 7:45 (later if there are accidents) and between 4:30 and 6:00.

Other things I always remind visitors:

Please keep your distance from the Hawaiian sea turtle. They are protected by state and federal law. Some people like to touch the turtles or take selfies with them, even place their little kids on them as if they are riding the turtles. This is illegal. The Hawaiian monk seals are also protected. They are sometimes seen basking on beaches but they too, should be admired from afar.

Regarding the ocean, tourists die here ALL THE TIME. People get swept off rocky ledges from rogue waves, pummeled by rough waves, or swept out by rip tides. You'd be surprised at how many people choose to ignore signs. Hawai'i is beautiful but can also be deadly to those who ignore safety in favor of the perfect selfie or their sense of adventure.