Tryon Island is a small cay of about 11 hectares in the Capricorn Group, close to North West Island. Like its neighbours it is a national park with Pisonia forest and Cordia trees and is an important nesting site for seabirds and turtles. Camping is sometimes permitted for groups of up to about 30 people, though the island has been closed at times for habitat recovery.

The Marine Life Network describes the reef as a good snorkel spot but notes that boat access is tricky: the island is surrounded by reef flat that dries at low tide, and landing or tender access must be timed for high water. Divers can expect shallow coral gardens, turtles, reef fish and reef sharks along the reef edge. Tryon has appeared on liveaboard itineraries touring the Capricorn Group, where it would usually be visited as a shallow dive or snorkel stop.

There is no operator based here, and visitors must be self-sufficient. The island suits snorkellers and relaxed divers with access to a private boat or liveaboard, and anyone wanting to experience a small, undeveloped cay. As with all the Capricornia Cays, nesting birds and turtles take priority: check QPWS for closures and camping availability before planning a visit.

Detailed dive information for specific sites around Tryon is not published, so conditions and depths given here are estimates based on similar cays.

The Capricorn Group lies 60-100 km north-east of Gladstone. Private boats launch from Gladstone Marina (Bryan Jordan Drive; ramps, fuel and trailer parking) and cross the shipping approaches and open water, typically 2-4 hours depending on vessel and destination; the Capricorn Bunker liveaboards that occasionally visit depart Gladstone or Yeppoon (Rosslyn Bay) and anchor overnight in the lee of the cays. Camping on the national park cays requires a QPWS permit and a camper transfer or private vessel.

Tryon Island lies near North West Island, roughly 75 km from Gladstone. Boat access is tricky over the surrounding reef; anchor off the reef edge and use a tender at high tide. Camping is sometimes permitted (about 30 people) by QPWS permit.

The Capricorn cays are exposed to the south-east trades (often 15-25 knots April-September), which make the Gladstone crossing rough and restrict diving to the lee (north-western) sides. The calmest windows are typically September-December and March-April. Northerlies in spring and summer reverse the sheltered sides.

Tidal currents run strongly around reef edges and channels on springs. Cyclone season November-April. The reef around Tryon dries at low tide and the approach is difficult, so time landings and snorkelling for high tide in calm conditions.

Anchor off the lee side, snorkel or dive along the reef edge in 3-10 m at high tide, and return to the tender before the tide drops.

No daily operator. Occasional liveaboard itineraries (for example the 8-diver MV Adori run by Professional Dive Services, 4 days/3 nights from Yeppoon) and fishing/snorkel charters such as Eastern Voyager visit the Capricorn cays; otherwise private boats and camping groups only. Tryon Island appears on MV Adori itineraries.