Anywhere from Bicton right up past Guildford. Pretty open question with a very open answer. Try dusk or dawn on the flats if that's your thing or head for the gnarliest snags you can find & cast in as tight to them as possible. 

 Woah woah too much information...

but seriously mate need to give us more info like where u are fishing etc

if u are fishing swan river try slow roll hard bodies on the canning river i have getting some monsters on most of the flats past mount henry