This is not an unusual winter time (especially late winter) scenario. Given the length of the season we are now into, the oceans are cooler. That coupled with abundant high clouds and possibly some lower clouds will hold down outside air temperatures, especially at the beaches. Further south, the wind will be progressively be blowing off warmer water. Looks like a classic 'cold air wedge' effect that has an affinity to wedge in on the Port Canaveral area toward the 520 and not so much toward Patrick Air Force Base.
Further south and inland temperatures will be warmer the further south one goes, but also those locations will not be privy to the direct effect of wind blowing off colder ocean waters. These conditions, coupled with lack of significant low level drying, could produce rather danky hanky panky. (I would have posted a hanky panky image , but...well, you know...) ...so we'll settle with some 'weather nasty' instead. "brrrr for the beaches"
TONIGHT/NEXT FEW NIGHTS: A variation of the same theme for a few days (through Thursday) as wind decreases. There is a flip side to the story. Overnight lows will be colder inland, possibly falling into the mid-40Fs heading into Wednesday and Thursday nights, while the continued onshore gradient wind will keep the temperatures right along A1A in Brevard from barely falling after dark. Cooler further north though closer to high pressure that will be crossing eastward toward the Atlantic.
BEYOND: New scenario unfolds from Friday and beyond with highs well into the 70Fs and SW to west winds at times. Although another cool spell is in the cards, it is fairly short lived, and then followed by above average temperatures heading into late January and early February. Granted, that is still too far off to say with absolute assurance, that seems to be the going trend though.