Ammo Jetty Dive Site

High risk: Jetty closed for construction

The jetty is closed to the public including waters immediately adjacent to and underneath due to storm damage and construction works (spring 2026 onward).

High risk: Jetty closed (storm damage)

Due to storm damage sustained in mid-2026, the jetty is closed to the public including waters immediately adjacent to and under the structure. Swimming, diving and snorkelling are prohibited until further notice.

High risk: Construction activity

Major reconstruction works began in spring 2026 with heavy machinery, vessels, and debris hazard in the vicinity for approximately 12 months.

Moderate risk: Fishing lines and hooks

Ammo Jetty is a popular fishing spot. Snorkellers should stay directly under the jetty and avoid swimming along the edges where anglers cast lines, to avoid entanglement or injury from hooks.

Moderate risk: Swell and wind chop

Winter swell and strong sea-breezes can deteriorate conditions quickly; check forecast before going.

Moderate risk: Jetty closure (construction)

The jetty and waters immediately adjacent and underneath are closed due to storm damage and construction works until approximately late 2027.

Moderate risk: Structural deterioration

The old jetty piles are deteriorating with sharp, exposed metal and broken concrete underwater.

Moderate risk: Storm damage / construction closure

As of 2026, the jetty is closed due to storm damage and construction. Access under and immediately adjacent to the jetty is prohibited.

Moderate risk: Fishing line entanglement on piles

The old jetty piles are covered in marine growth but also tangled fishing line — a dive knife is strongly advised when snorkelling under the jetty.

Moderate risk: Deteriorating jetty structure

The old ammunition jetty has deteriorated over time with exposed metal and debris; caution needed around the pylons.

Moderate risk: Depth (7-9 metres)

The water depth at the jetty is 7-9 metres — you cannot touch the bottom. Suitable only for confident swimmers and snorkellers.

Low risk: Boat traffic near jetty end

Boat traffic can be present around the outer end of the jetty where depths reach 8–9 metres. Snorkellers should surface cautiously and be visible.

Low risk: Crowds during peak times

The jetty gets very busy during summer weekends and school holidays, which can lead to congested water conditions and increased risk of accidental contact.

Low risk: Boat traffic near jetty

The Ammo Jetty is used by recreational and fishing boats; snorkelers should stay alert and be visible.

Low risk: Jagged structure / debris

The ageing jetty has deteriorated surfaces and submerged debris that can cause cuts or scrapes.

Low risk: Boat traffic

Boat activity in Cockburn Sound requires snorkelers to tow a dive flag for visibility.

Low risk: Limited visibility near shore

Visibility can be low close to the beach (especially after wind/ swell), improving as you approach the rock wall.

Low risk: Fishing line and hooks entanglement

Fishing activity from the jetty with hooks, lines, and sinkers. Snorkellers should watch for discarded fishing tackle.

Low risk: Silt suspension (poor viz)

Silty bottom easily stirred up, reducing visibility from 8–10 m to near-zero within minutes.

Low risk: Jetty redevelopment construction (2026+)

Construction works from 2026 onward may restrict access; check Department of Transport WA updates.

Low risk: Fishing activity peak hours

Fishers are active from late morning onward; early morning (before 8am) is quietest.

Low risk: Fishing lines

Jetty is heavily used by fishers; risk of entanglement from fishing lines and hooks in the water.

Low risk: Boat traffic adjacent to zone

While motorised vessels are restricted near the jetty, boat traffic exists in the broader Woodman Point area.

Low risk: Jetty structure debris

The old wooden jetty is deteriorating with loose timber, nails, and metal fittings; sharp objects may be present on the seabed.

Low risk: Boat traffic (outside exclusion zone)

Motorised vessels are restricted around the jetty, but kayaks and dinghies may be present; keep awareness near the T-head and channel.

Low risk: Boat traffic in adjacent waters

Motorised vessels are restricted immediately around the jetty but occur in the surrounding Owen Anchorage and Cockburn Sound.

Low risk: Sharp marine growth

Barnacles and encrusting organisms on the jetty pylons can cause cuts — wearing a wetsuit or rash guard is recommended.