If you name a beach or dive site I can provide video of dives on the location.
Oahu is split into two very distinct sides; local area/ tourist zones. Almost all dive companies will attempt to not bring you to where the locals live and play. Hire a local dive instructor, I can give some great references if needed.
Oahu is a island full of great dive locations. Unfortunately for most travelers they are on the island during the wrong part of the year. Summer in Hawaii is the dive season, flat clear blue waters, anything starting after august the waters get a bit messy, Sept-Feb you really need a boat to do a good dive unless your a hardcore and don't mind beach entry in big surf 5-10 foot waves a lot bigger on some northshore beaches.
Diving in the summer, some great spots to hit that you will not find listed on any dive shop and are great beach entry 2 tank dives.
top three of my list
Makapu'u is amazing.
For Novice divers the 20ish deep lagoon/beach area is amazing. For advanced divers willing to do a 15 minute surface swim out to rabbit island its freaking wonderland. Giant 50 foot aquascape's arching out to open waters, jagged volcanic teeth jutting up from the 50ish foot bottom covered in the local corals. schooling Jacks, many reef sharks, goat fish like mad, and of course the Hawaiian parrot fish every where. If this dive is done in the winter months you need two tanks! You also need to be advanced swimmers! and most importantly you need to used to sharks and whales.
Alan Davis beach off south side
Again this will not be listed by any diver company.
It requires you be able to walk in gear and tank at least a foot ball pitch before and after the dive.
Its a single or two tank summer dive.
It is truly amazing during flat waters and can be snorkeled safely if your a good swimmer.
You will be in no more the 30 feet of water just about the full dive, entry is about 3 feet with a 20 foot swim out, then hang a hard left and follow the sheer cliff that arches up to the light house several hundred feet up.
Its full of reef sharks, tangs schooling, parrot fish, and all the wonders found in Hawaiian waters. I ran into my first pod of spinner dolphins here and they are almost always hanging around checking the very few folks out. A word of warning if you want a lot of other divers in the water with you, this is not your spot. On most days you will be the only souls in the water within eye shot. surfacing will let you see the lighthouse to your back and the other islands out to sea.
Pray for sex beach.
Warning, this is a extremely advanced dive summer only dive.
North west Kaena point side, deep in the local living area.
The beaches are pristine, the swimming is amazing, and local customs should be followed at all times.
The dive can only be described as prehistoric. Giant school fish, big sharks, whales, coral heads, deep chasms rolling from 10 feet to 100, bright white sand and complex coral heads lining the maze of rock work. This can be as many tanks as you can dive as is runs more then a mile north to south and has great beaches on both sides.
Never dive this alone, never dive this tired, and never ever dive this sight in the winter months.
I can list out the best winter dive sights, and more importantly the best guides to use on any island. I will say to avoid the companies that hype the Eco-friendly side of diving. In Hawaii that's just a sale ploy, you will end up on a crappy boat maxed out with many other divers with a bottle of water and a ham sandwich in a plastic bag....not eco at all, just cheap.
Later tonight I'll post big island dive sights not to be missed, along with the best spots to get some snorkeling in. It is the best island for water sports.
Basic keys to getting the best treatment in Hawaii.
Always greet with a Houzit (how-zit) not hello or nice to meet you. just How-zit, when you get comfortable a bra at the end "How-zit bra." and toss a short shaka up instead of a handshake. don't twist it, just raise your hand about hip high holding your thumb and pinky out just a bit with a fist made fingers down. casual like friends shaking hands after golf.
If someone is speaking pigeon to you its a good thing, don't correct them. Just go with the flow and speak your mind, Hawaiians are very up-front and honest and once they see that your not easy money or "haole" (off islander, not native, not local, easy money, random white guy, sucker, not one of us) and have been on the island before the prices will drop...a lot and your aloha really starts to shine, trust me its a good thing.
The shaka is a real thing, when driving be very nice. Let others out, show the shaka when they do the same to you just wave it up at the rear view mirror and smile. remember its a very small island.
It is true they call all there friends cousin, uncle, auntie...because its a small population, and they are in fact....all related. So if they refer to u as one of these go with it, it shows they are cool with you.
Never let a taxi take you for the scenic tour lol, ever. your talking a $400 cab ride and most of what you will see is Waikiki traffic. Never buy a lady a drink that she gets form the bar. You go get it and pay for it, no tab drinks for her. Always be clear with the bar tender about what she is getting and the price. Don't do this and you maybe end up with a easy grand bar bill.
Keep your drinks covered up or in your hand. Stay with your lady, and never leave your drinks around strangers. Its common for haoles to get drugged while out drinking. Not for rape or abduction but to juice you for much more money. You will have one hell of a great night but will feel like a donkeys butt hole for the next two days. Not to mention the small fortune you drop in the bars.
Be nice to U.S soldiers, sailors and marines. Hawaiians are super patriotic, on a whole other level then mainland U.S. They still remember pearl harbor and will rally around any service member that someone is being rude to. To the existent of tossing you out of hotels, bars, planes, boats, cars.... but if you smile then buy that guy or gal a drink, your on track to a great night, or simply say great job, and toss a shaka, same same.
Cheers,