Winter in Southwest Florida? The fish haven't noticed, with water temps around Sanibel Island in the mid 70s. Large schools of redfish are all over the flats and oyster bars. Top baits have been white bait, jigs tipped with Gulp and cut baits. (mullet & ladyfish) The key is to look for a spot with life. If you don't see birds and bait working the flat there is probably not a lot of fish on it.