The 30-year fixed mortgage rate stepped slightly higher, while both the 15-year and 5/1 ARM rates eased lower today, according to the Zillow lender marketplace. Rates have been surprisingly calm so far this week, considering recent bond market volatility. The average 30-year fixed rate is 6.55% today, Wednesday, August 19, 2026, up two basis points since yesterday. The 15-year fixed loan is currently at 5.87%, seven basis points lower than yesterday. The 5/1 ARM is 6.31%, eight basis points lower than ...