Meet the site
Blackwall Reach is the deepest part of the lower Swan River, where the channel runs beneath the limestone cliffs of Blackwall Reach Reserve in Bicton. It is known locally as a cliff-jumping spot and to divers as a river site for days when the ocean is closed. Depths reach about 15 m close to the bank and about 18 m at the barge site.
The bottom is a mix of sand, rubble and a great deal of human debris: dumped cars (the Marine Life Network counts three), a sunken barge whose history is known, and metal scrap. Divingwawrecks also lists three unidentified modern motorboats and cruisers that are hard for shore divers to reach. The debris gives shelter to small fish, and the site has more to it than first appears.
Marine life is sparse but interesting. White-spotted and moon jellyfish are often abundant, cardinalfish (including breeding males carrying eggs in their mouths), gobbleguts, bream, stripeys and toadfish live around the debris and the bank, and seahorses and nudibranchs turn up.
Visibility is usually poor, at 0.5–4 m, and the river is busy with ferries, recreational boats and jet skis. Divers must use a flag, stay near the bank, ascend slowly and wear gloves because of sharp metal.
Blackwall Reach suits experienced divers who are comfortable in low visibility and want a river dive with some depth. It is not for beginners.
River temperatures swing more than the ocean: about 22–26 °C in late summer but as low as 13–15 °C in winter, when a 7 mm suit or drysuit makes a long dive more comfortable. Rinse gear well afterwards, as the estuary water is often high in organic matter.
Research this site before booking Stored site notes may be historical. These questions highlight gaps without turning old instructions into a current dive plan.
Blackwall Reach (Swan River) is recorded as Freshwater Lake/River in Perth. The listed access is shore. Confirm the actual meeting point, route and permission to visit; a map pin does not establish any of these.
Topics flagged by the stored research
These are questions prompted by the existing notes, not a verified or complete hazard assessment.
- Current and timing
- Ask how the operator assesses the current window for the actual route. Historical tide notes are not a departure instruction.
- Other water users
- Ask about vessel activity, exclusion areas and the agreed surface arrangements.
- Planned depth
- Confirm the intended route and training requirements; the recorded maximum is not a target.
Historical access notes exist for this record, but have not been independently verified for current use. Request current directions from the operator or site manager rather than following an old entry description.
Questions, answered
Is Blackwall Reach (Swan River) suitable for my certification?
The record lists Advanced Open Water. That does not establish suitability for every route or day. Share your training, recent experience and equipment needs with the operator and ask about the specific proposed dive.
Can I book Blackwall Reach (Swan River) through YouDive?
YouDive is an independent research directory. Contact an operator directly to confirm whether it currently runs the trip, the inclusions and the booking terms.
What you might see
White-spotted jellyfish, moon jellyfish, cardinalfish (mouth-brooding males), gobbleguts, black bream, stripeys, toadfish, seahorses, nudibranchs
Location
Estuarine river dive below the limestone cliffs of Blackwall Reach Reserve, Bicton, with dumped cars, a sunken barge and metal debris in up to 15–18 m.
Facilities nearby
Car park at the bottom of Kent Street; Point Walter reserve nearby has toilets and a cafe. Air fills in Fremantle.
Before you make plans
Conditions, access and operator schedules can change. This is a location guide, not a dive plan. Ask a local operator about current conditions and suitability for your training and experience.
Sources & further reading
howiesscuba.comhowiesscuba.comdivingwawrecks.commarinelife.org.auRecord updated 26 Sept 2026. Source claims are being reviewed.
