Kelso Reef is a mid-shelf reef about 47 nautical miles north of Townsville, off the Palm Island group. In the 1980s and 1990s it was a regular Townsville day-trip reef with coral gardens of brain, hedge, honeycomb and plate corals and drop-offs to around 20 m, and dive guides still list it as a beginner-friendly site with maximum depths of about 15–21 m and 'great corals and snorkelling'. More recent observations are less glowing.

The Marine Life Network notes low coral cover after successive cyclones, with the reef in recovery and fish life dominated by smaller species. The reef layout – shallow coral gardens on the top and upper slope, a clear drop-off on the exposed faces and sand below – is typical of the Townsville mid-shelf, and when coral recovers these reefs can rebound quickly. Expect damselfish, parrotfish, surgeonfish, angelfish, fusiliers and coral trout, with the odd large cod under ledges, reef sharks on the edges and turtles.

Kelso's neighbour, Little Kelso Reef, has a documented north-eastern drop-off with gullies, caves and swim-throughs and is the more interesting of the pair for experienced divers. Kelso's main drawback today is distance: at around 3–3.5 hours from Townsville it is further than the regular day-trip reefs, and no operator currently lists it as a standard destination. It is better approached by private charter from Lucinda or from Orpheus Island, which lie much closer.

For divers on a liveaboard or private charter heading north, it is worth a look as a relaxed shallow dive; for most visitors John Brewer, Lodestone or Keeper will offer better value.

Boat only. Kelso lies about 47 nautical miles north of Townsville – roughly 3 to 3.5 hours by charter vessel from Breakwater Marina – so it is visited mainly by private charter, liveaboard or on long club day trips rather than scheduled day boats. It can also be reached from Lucinda or Dungeness (near Ingham) or from Orpheus Island by private charter, which shortens the run considerably.

Private vessels should launch at the Townsville Breakwater or Lucinda ramps, carry offshore safety gear and use public moorings where installed. There is no shore access.

The Townsville mid-shelf reefs sit fully exposed to the south-east trade winds, which blow 15–25 knots for long stretches from April to September. Operators generally cancel when winds exceed about 20 knots or a strong wind warning is current, and the 2–2.5 hour crossing is rough above 15 knots. The calmest windows are the late-spring and early-summer glassouts (October–December) and occasional winter high-pressure lulls.

Visibility is usually 12–25 m, dropping after big south-easterly blows and after wet-season floods from the Burdekin and Herbert rivers push turbid plumes offshore (January–April). 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).

Tidal currents around reef edges and bommies are strongest on spring tides; plan wall and pass dives near slack.

Descend onto the coral gardens at 8–12 m, follow the edge of the drop-off along the reef to 15–20 m, and return up the slope into the shallows. Keep the reef on one side for easy navigation.

No regular day-trip operator currently lists Kelso; visited by private charters from Townsville and Lucinda, Orpheus Island Lodge private charters to the outer reef, and occasional liveaboards.