The usual flathead baits and lures work just as well here. Prawns, baitfish even sand or beach worms.
Good spots are often where the estuary has sandy beaches. Cast out into the channels and gutters. The turning tide is an excellent time to try.
Dusk & Dawn, Top Times
The larger flathead specimens are more likely to move in closer to shore after dusk and before dawn.
Berley and attractant is a must when flathead estuary fishing. See the next section where I explain some of the reasons I always use these tools. Suffice to say for now this is what gets the fish in closer to where you are and helps create some interest.
Because estuaries are such changeable environments there are times when flathead estuary fishing is going to be better – or worse.
For example, during and after a flood there’s often murkier and fresher water in the estuary. The tide is going to wash less salty water into the system. That can result in fewer flathead in the river. Naturally, this depends on the estuary. It seems to be a bigger problem in the southern states than northern states.
Flathead Estuary Fishing Environmental Considerations
You need to also consider the environment itself. Pollution levels from chemical spills. How clogged up the estuary gets. Weeds and more importantly silt can block the flow of the system. Because of this, some estuaries can remain landlocked for part of the year.
The Powlett river at Kilcunda is a good example of this. I’ve never caught a single flathead there. Though I’ve caught small Australian salmon. The Powlett estuary is frequently obstructed by a sandbar. When it does run it often does so over an exposed rock shelf that limits the amount of tidal water that enters the area.