The warmest part of Florida in January is consistently the Florida Keys, specifically Key West. Because of its southern latitude and the tempering influence of the surrounding Gulf of Mexico and Atlantic Ocean, Key West averages daytime highs of 75°F to 77°F (approx. 24°C–25°C) even in the dead of winter. If you prefer the mainland, the Miami and Fort Lauderdale areas are the warmest options, typically staying in the low 70s. In 2026, climate data shows that while North Florida (Jacksonville) or Central Florida (Orlando) can occasionally see frost or temperatures in the 40s during a cold snap, the "Tropical Tip" of Florida rarely drops below 60°F at night. For beach-seekers in 2026, the Miami Beach area is the most reliable for swimming, as the water temperature stays around 71°F, which is much warmer than the Gulf side (Clearwater/Tampa) during the same month. If you are looking for a true "winter escape" where you can wear shorts and sandals comfortably in January, heading as far south as possible toward the Keys is your best strategic move.