Are there crocodiles at Onslow?

Yes. Saltwater crocodiles have been confirmed at Front Beach, in Beadon Creek and on the lower Ashburton River in recent years, and the Shire of Ashburton issues sighting alerts. Treat all tidal water around Onslow as potential croc habitat — no wading, no cleaning fish at the water's edge, and stay back from undercut mangrove banks.

Do I need a boat to fish Onslow?

No, but you'll get more out of the trip with one. Beadon Creek wharf, the groyne and Town Beach all fish from the bank for queenfish, trevally and the occasional mangrove jack. The Mackerel Islands and the offshore shoals are where the trip really pays off, and the islands can be done by private boat in settled weather or by ferry and charter from the wharf.

What are the bag limits for mangrove jack at Onslow?

Onslow is south of the De Grey River, so the daily bag limit is 2 mangrove jack per angler at a 300mm minimum size. Jacks aggregate and are vulnerable to localised overfishing — most local crews self-impose a one-fish-and-leave rule on a single creek section. Verify current DPIRD rules before fishing.

When is the best time of year to fish Onslow?

May to October is the prime window — dry season, settled weather, reliable mornings before the trade wind and the offshore shoals fishable on more days than not. Spanish mackerel peak in the build-up shoulders September–November and again March–April. Avoid the cyclone window November to April unless you're committed to flexible plans.

Bite Compass

Fish Activity

Onslow (Town Beach / Beadon Creek / Mackerel Islands)

Fri 08 May 2026 · Australia/Perth

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📍 Onslow (Town Beach / Beadon Creek / Mackerel Islands)

last quarter · 62%

Weather: Sunny Wind: E 79° · 23 km/h Water: 25.4 °C

★★★★☆

Medium Fish Activity

▸ Why this score?

Wind E 23 km/h — Moderate

Solunar Major window active

Water Temp 25.4°C

Moon Phase last quarter — 62%

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Activity Forecast

Feeding Windows

Best times to fish based on activity score.

Peak

5:00 pm → 8:00 pm

Good

5:00 am → 10:00 am

Good

1:00 pm → 2:00 pm

Good

3:00 pm → 4:00 pm

Sunrise

7:40 am

Sunset

6:51 pm

Moonrise

—

Moonset

12:57 pm

High tide

1:00 am

Low tide

7:00 am

High tide

1:00 pm

Low tide

8:00 pm

Hourly Wind

High Bite Hours Highlighted