average winter temperatures in myrtle beach
Myrtle beach: Annual Weather Averages. July is the hottest month in Myrtle beach with an average temperature of 28Â°C (82Â°F) and the coldest is January at 8Â°C (46Â°F) with the most daily sunshine hours at 12 in June. The best month to swim in the sea is in July when the average sea temperature is 28Â°C (82Â°F). Loading weather data.