Always slow in winter. What you can do is, on the road where all the houses are, go right to the fence that blocks the botanical gardens, and walk up the bank towards the yacht club, and fish any likely look spots, under the willows is always good.
There is a concrete pipe running into the dam, under a willow, have a few throws under that tree, I lost a HUGE bass there cos it jumped into the tree, lol.
Walk past the yacht club(try get a few throws in around there if you can, the bass love it, the canoeists do not, you're not allowed to fish there), then make your way along the wall, looking for any signs of them, and, have a few throws near the over flow.
When you get to the end of the wall, walk along the bank that leads to the botanical gardens, there is a concrete jetty type thing there, have a few casts in the bay there, it normally has nice bass.
Past that, but still outside the gardens is a section with lots of over hanging trees, plenty bass there, but it is pretty secluded so be careful cos vagrants hang around there sometimes!