The map below is from Google Maps. Several businesses share the Haleiwa Boat Harbor and where the businesses have been labeled on the map are a bit misleading, so I’ll help decipher. After turning onto Haleiwa Rd from the Kamehameha Hwy, turn into the boat harbor heading towards what says “H20 Adventures Hawaii”. Just to the left of that you’ll see a little hut known as the Shark Shack. Check-in there and you can have all your questions answered there if needed. North Shore Shark Adventures prefers if you park slightly across the way in the area where it says “Watercraft Connection” and “North Shore Shark Adventures”. Then have you walk back towards the Shack where the actual boat is. The parking where you first turn in is limited and they don’t want anybody getting towed or ticketed.