Weather In Tampa – Jan – 2025 In Degrees. Chills could lead to temperatures as low as 20 degrees fahrenheit. The month with the coldest seawater in tampa bay, florida, is january, with an average ocean temperature of 64°f (17.8°c).

January tends to be the coldest month, with temperatures averaging a daily high of 67.8°f (19.9°c) and a low of 53.4°f (11.9°c). Get the monthly weather forecast for tampa, fl, including daily high/low, historical averages, to help you plan ahead.