Today's average rate on a 30-year fixed-rate mortgage is 6.76%, down 0.05 percentage point from the previous week.Borrowers may save on interest costs by choosing a 15-year fixed mortgage with an average APR of 5.89%.The average interest rate on a 15-year fixed mortgage is 5.83%, providing a repayment period of 15 years.The average interest rate on a 30-year fixed-rate jumbo mortgage is 7.13%.