The Southern states, like Florida and California, typically experience warmer temperatures. It can reach daily highs reaching up to the 70s and 80s (Fahrenheit). Meanwhile, the water temperature at these destinations is also typically welcoming, ranging from 24° to 26°.
On the other hand, some Northern states may still see cooler-than-average temperatures and potential rainfalls in March. Don’t be surprised if you run into some light showers, especially on the East Coast and Pacific Northwest regions.