Mortgage and refinance interest rates today, Tuesday, September 1, 2026: Fixed rates move higher following U.S. airstrikes near Hormuz

On Tuesday, September 1, 2026, mortgage and refinance rates saw an increase following U.S. airstrikes near Hormuz, according to Zillow's lender marketplace. The average 30-year fixed rate rose to 6.59%, a 4 basis point increase from the previous day. Meanwhile, the 15-year fixed loan climbed to 6%, with a 9 basis point rise since Monday. The 5/1 ARM was at 6.22%, a 4 basis point decrease compared to yesterday.

These rates represent national averages, rounded to the nearest hundredth. Refinance rates are generally higher than purchase rates. A mortgage calculator can be used to determine how various mortgage term lengths and interest rates impact monthly payments, including property taxes and homeowners insurance. Generally, 15-year mortgage rates are lower than those for 30-year mortgages, but monthly payments will be higher due to the shorter time frame for paying off the loan.