About Lilli Pilli
Sheltered muck diving in the Port Hacking River featuring small drop-offs and sandy bottom, renowned for White's seahorses, nudibranchs, and cuttlefish.
Lilli Pilli 7-Day Weather Forecast
About this forecast
7-day weather forecast for Sydney, NSW sourced from Open-Meteo. Shows daily high/low temperatures, weather conditions and rain probability — useful for planning your drive to Lilli Pilli.
Lilli Pilli 7-Day Swell & Wave Height Forecast
About this forecast
7-day swell forecast for Lilli Pilli, calculated using Pelagic's Hadal Conditions Intelligence™. Wave heights are site-specific — adjusted for Lilli Pilli's exposure, orientation and depth profile. Colour bands show diveable conditions at this site: green is ideal, orange is marginal, red is undiveable.
Optimal Dive Times & Tide Chart — Lilli Pilli
About this chart
5-day tide chart for Lilli Pilli showing high and low tides with best at high tide conditions highlighted as green. Tidal movement directly affects visibility and current strength at Lilli Pilli — plan your entry to coincide with the green windows for the best conditions.
Tide data is site-specific and accounts for Lilli Pilli's tidal sensitivity. This site dives best best at high tide.
Dive Site Guide
Lilli Pilli sits quietly in a protected corner of the Port Hacking River, well away from the ocean swell that governs most Sydney dive sites. It is a genuine muck dive — shallow, sheltered, and almost entirely about what is living in the sand and silt rather than the terrain itself. White's seahorses are the headline act, and this can be a reliable site in Sydney to find them. Nudibranchs, cuttlefish, and pipefish round out a list of species that rewards slow, careful divers who resist the urge to cover ground. The site extends to almost 25 m deep but most of the interesting life is concentrated in 4–8 m of water around the netted baths and the adjacent sandy bottom to the NE.
Visibility averages 4 m — low by Sydney standards but typical for a sheltered river site. The difference between a murky dive and a clear one comes down to timing: aim for just before high tide, and avoid the site for at least a week after heavy rain when Port Hacking runoff clouds the water significantly. Current is minimal throughout, which keeps the dive relaxed from start to finish.
Buoyancy control matters here more than at most Sydney sites. The silt bottom disturbs instantly and a careless fin stroke degrades visibility for every diver in the water for minutes afterward — slow down, stay high, and move deliberately. Entry is either via the first lot of steps and off the baths wharf or take the steps at the end of the road and enter via the Sea Scouts boat ramp. Boat traffic runs 30 m to the west, so surface well inside the shallows and ideally east of the baths boundary. A dive flag is strongly recommended when on the surface.
The site also rewards multiple visits across different seasons. Water temperature at Lilli Pilli ranges from around 21°C in summer to 15°C in winter, and the cooler months bring increased nudibranch and invertebrate activity on the reef margins. The White's seahorses that populate the netting and seagrass are present year-round but easier to spot when visibility is at its best — which means planning for the incoming 2nd half to high tide window consistently rather than diving at whatever the tide happens to be. A second dive on the same day at different stages of the tide cycle is a useful exercise for understanding how dramatically the site changes with water movement.
Restrooms are at the base of the steps to the baths. Abyss Scuba Diving is the closest shop at 11 km distance.
