Three different experiences live on this coast: guided kayak-snorkel tours over the mother reef at Olowalu (25 minutes south), Hawaiian outrigger canoe tours launching from Kāʻanapali Beach ten minutes away, and DIY SUP with boards delivered free to the condo. They reward different moods — wildlife, culture, and solitude — and all three obey the same clock: on the water by seven, off by ten or eleven.
Why Olowalu: it's a “mother reef” — one of the oldest, largest coral systems in Hawaiʻi, seeding the reefs of Lānaʻi and Molokaʻi — with a turtle cleaning station where sightings are nearly guaranteed. South Maui operators run similar tours at Makena, but from Honokōwai that's a 70–80 minute drive; only bother if you're already headed south.
The outrigger canoe is the vessel that found these islands. Paddling one with a Hawaiian guide — an oli (chant) before launch, the place-names of the coast as you stroke past them — is a cultural experience no catamaran can match, and it happens right on Kāʻanapali Beach.
Rentals: Maui SUP Rentals delivers boards free to Honokōwai and Kāʻanapali condos (~$45/day, weekly discounts); Auntie Snorkel runs $35 all-day rentals with weekly delivery; 808 Boards in the Honokōwai Marketplace is the walk-in option; and Kāʻanapali Surf Club rents by the hour on the resort beach for a supervised first try. Hard-shell kayaks are scarce to rent on the west side — if you want a kayak, take a tour.
Where to launch, in order of sense: Kahekili/Airport Beach (3 minutes, sandy entry, showers, the home reef below you); Nāpili Bay (10 minutes, protected crescent — surgy in winter swell); Kapalua Bay (13 minutes, the most sheltered beginner water on the coast — lot fills by 9); and for the experienced, the mile-wide Olowalu reef (25 minutes; stay in the sand channels). Launching straight off the beach out front works on flat days — enter through sand channels only; never drag a board over the reef.