Myrtle Beach Weather In March 2025. In myrtle beach during march average daily high temperatures increase from 62°f to 68°f and it is overcast or mostly cloudy about 45% of the time. In march 2025, myrtle beach’s spring break weather presents cooler mornings and evenings, gradually warming up as the day progresses.

Check the temperatures, chance of rain and more in myrtle beach during march. Evolution of daily average temperature and precipitation in myrtle beach in march.