Langford Island, a small island off Hayman's south-west, trails a long sand spit that has become one of the best-known snorkelling stops in the Whitsundays. For divers, 100 Magic Miles describes Langford Reef North as scattered small coral bommies on a sandy bottom with shallow walls, depths of 3–15 m and visibility of 2–10 m. Fish are mostly small but abundant.

The guide's warning is clear: expect tidal currents at all times except slack water. The Ngaro Underwater Marine Sculpture Trail added a centrepiece in 2019: Turtle Dream by Col Henry, a 6.5 by 6 m stainless-steel sculpture celebrating the hawksbill turtle, set at about 7–10 m off Langford Spit. One guide also places the collective-made Anthozoa, inspired by coral polyps, at Langford (the official trail page lists Anthozoa for Blue Pearl Bay).

The sculptures were commissioned after Cyclone Debbie to draw visitors back and to provide new substrate for coral. Confident snorkellers can see Turtle Dream at mid to high tide; divers get closer views. Real turtles are common around the spit, and the sand and bommies host rays, goatfish, wrasse and damsels.

Coral is patchier than at the northern Hook sites, and visibility is often modest because of the sandy bottom and tidal flow. Langford is heavily used by snorkel tours and sailing trips, especially for the spit beach at low tide, so boat traffic is significant. For divers, the key is timing: at slack water it is an easy, interesting dive combining reef, sand and art; at mid-tide on springs the current can be strong enough to make it unpleasant or unsafe.

Boat only. Langford Island is about 18–20 nautical miles from Airlie Beach – roughly 40–60 minutes by fast day boat from Coral Sea Marina or Port of Airlie, or about 1 hour from Hamilton Island marina. Day tours that stop here include Ocean Rafting, Red Cat Adventures (Thundercat), Whitsunday Dive Adventures and Explore Group (from Airlie and Hamilton Island); overnight sailing and bareboat charters also visit.

Private and bareboat skippers must use the public moorings (time-limited, first come first served) and observe no-anchoring areas marked by reef protection markers; bareboat operators restrict where hirers may go. Parking at Airlie is available near Coral Sea Marina and the Port of Airlie. Many snorkel tours and sailing trips stop at Langford Spit.

Whitsunday island reefs are exposed to different winds depending on aspect: the dominant south-east trades blow 15–25 knots April–September, and northerlies are common October–March. Tidal currents through the islands are strong on spring tides (range up to about 4 m), particularly at bay entrances, points and passages – plan dives at slack water and neap tides. Visibility is usually 5–15 m, dropping after strong winds, big tides and wet-season rain.

Manta rays visit May–September. Marine stinger season (box jellyfish and Irukandji) runs roughly November to May – wear a full-length stinger suit or wetsuit with hood and gloves, carry vinegar. Cyclone season November–April; tropical lows and cyclones can close sites and damage coral (TC Yasi 2011, TC Debbie 2017). 100 Magic Miles: tidal currents at all times except slack water.

Langford Spit is exposed to strong south-easterlies; snorkel the sculpture at mid to high tide.

At slack water, descend on the north side among the scattered bommies on sand at 5–15 m, visit the Turtle Dream sculpture at 7–10 m, and return along the shallow walls towards the island. Snorkellers stay near the beach and island.

Ocean Rafting, sailing charters and snorkel tours (frequent spit stops); dive boats occasionally. Ocean Rafting (Northern Exposure/Southern Lights – daily snorkel stops on northern Hook), Red Cat Adventures Thundercat (daily, Mantaray Bay/Stonehaven), Whitsunday Dive Adventures (certified and Discover Scuba day trips, several times a week), Explore Group (dive and snorkel from Airlie Beach and Hamilton Island, daily), plus overnight sailing vessels and bareboats.