FIRST ALERT: Cold and sunny today, quiet weather into the new week Sunday Forecast By Jessica Dobson | January 17, 2021 at 9:12 AM EST - Updated January 17 at 9:12 AM MYRTLE BEACH, SC (WMBF) - Itâs a cold start to the morning with temperatures in the upper 20s and low 30s across the Grand Strand and Pee Dee. Even with sunshine in the forecast, we will be slow to warm up today. High temperatures will struggle to reach the low 50s today across the Pee Dee, and low 50s are expected across the Grand Strand. Today's Forecast (Source: WMBF) As we head into the new week, and overall quiet and dry pattern will settle in. Temperatures look to remain cool through about Tuesday, as highs only warm into the low 50s. Party to mostly sunny skies will continue into the new week as well, thatâs until clouds return as we head towards Wednesday.