Some mortgage interest rates have increased today, while others have decreased. Regardless, most of the shifts are minor. According to Zillow, the average 30-year fixed mortgage rate is up four basis points to 6.47%, but the 15-year fixed rate has inched down three basis points to 5.66%. Read more: The best mortgage lenders for first-time buyers Today's mortgage rates Here are the current mortgage rates, according to the latest Zillow data: 30-year fixed: 6.47% 20-year fixed: 6.10% 15-year fixed: 5 ...