Question 1

Are there crocodiles at Onslow?

Accepted Answer

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.

Question 2

Do I need a boat to fish Onslow?

Accepted Answer

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.

Question 3

What are the bag limits for mangrove jack at Onslow?

Accepted Answer

DPIRD reformed mangrove jack rules in 2025–26 — bag and size limits have shifted, so check the current regs before each trip rather than relying on older guides. Jacks aggregate and are vulnerable to localised overfishing; most local crews self-impose a one-fish-and-leave rule on a single creek section regardless of the daily bag.

Question 4

When is the best time of year to fish Onslow?

Accepted Answer

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.

Onslow (Town Beach / Beadon Creek / Mackerel Islands)