The weather is cold and unstable, and nobody is fishing much. Well, the birds are fishing, but birds are extremely talented and can catch fish through a blizzard. Anyone who has ever sat and watched them knows no angler can match the skill of our feathered friends. Few humans, however, are out casting about.
There are redfish schools in the shallows (or so I am told) that might or might not be willing to bite on the warmer days. In truth, most are probably just content to chill out and hide from dolphins (who have some freakish fishing skills themselves).