There were kahawai around, and they were curious, but I couldn't get one to grab my lure.
I was using the lure I normally use when targeting kahawai these days - a Blue Fox jigging lure. I like the look of them, the way the move in the water, and the fact that most people seem to use the tried-and-true hex lures for kahawai, so I assume that using something different will often give me the edge (one can always live in hope).
After fishing in the river mouth for a while, I shifted slightly more up-river, inside the mouth where it's a bit deeper, and was almost ready to call it a day when I remembered how I usually fish these lures (I tend to hibernate over winter and haven't been fishing much at all).
Back when I first discovered the lures, I found a jerky retrieve of three or so turns of the reel handle followed by a brief pause to let the lure drop seemed to yield the best results, with the kahawai often grabbing it during that pause.
Soon after changing my technique I hooked and landed a nice kahawai that ended up smoked and in a fish pie the next day.