Winter Shark fishing?

The boys and I fish 3 mile bridge oftenly, catching a variety of species in the warmer months including sharks, redfish, grouper, Red Snapper etc....we haven't had a shark bite all fall or winter....are there still sharks in the pass this time of year or do I need to wait for a rise in water temperature. .we've caught so many bull reds, that we want a change up, but big game...and inshore/nearshore...Thanks for your knowledge. ..Good fishin all...