Data Analysis

Freddie Mac's 30-year fixed-rate average rose to 6.95% for the week ending September 17, up from 6.76% a week earlier and 6.26% a year ago, a fourth consecutive weekly increase.

The 15-year average rose to 6.26% from 6.09%. This is the first weekly survey reading published after the Federal Reserve raised its target range on September 16.

The 30-year fixed-rate mortgage averaged 6.95% for the week ending September 17, Freddie Mac reported, up from 6.76% the week before and 6.26% a year ago. The 15-year fixed-rate average rose to 6.26% from 6.09%, against 5.41% a year ago. It is the fourth straight weekly increase in the 30-year average, which has moved 6.66%, 6.71%, 6.76% and now 6.95% since the week ending August 27. The 19 basis point rise is by far the largest of those four steps.

Sam Khater, Freddie Mac's chief economist, kept it brief: "The 30-year fixed-rate mortgage continues to fluctuate as markets assess economic data."

Did the Fed's rate hike cause mortgage rates to rise?

The Federal Reserve raised its target range for the federal funds rate by a quarter point to 3.75% to 4% on September 16, the day before this survey published. The sequence is tempting to read as cause and effect and it is more complicated than that.

The federal funds rate is an overnight rate banks charge each other. Thirty-year mortgages are priced off long-term yields, principally the 10-year Treasury, which move on expectations about inflation and growth rather than on the Fed's overnight target directly. Mortgage rates frequently move opposite to a Fed decision, because the decision itself is usually priced in before it happens and what moves markets is what the Fed signals about the path ahead.

What can be said accurately is narrower. Rates were already rising for three weeks before the meeting. This week's survey covers a period spanning the decision and shows the largest single-week increase of the four. Freddie Mac does not attribute the move to the Fed, and neither should anyone reading this.

What does 6.95% do to a Florida mortgage payment?

Take the Florida single-family median sale price of $415,000 that Florida Realtors reported for August, with 20% down and a $332,000 loan.

At 6.95%, principal and interest run about $2,198 a month. At last week's 6.76%, the same loan costs about $2,156. At the 6.26% average of a year ago, about $2,046. So this week's move adds roughly $42 a month, and the year's move adds roughly $151 a month, close to $1,816 a year, on an identical loan.

Those are this desk's calculations from the published averages, not figures Freddie Mac publishes, and they exclude property taxes, homeowners insurance and any mortgage insurance. In Florida, insurance is the line that most often decides affordability, and it is not in these numbers.

Which mortgage rate number should you believe?

There is an unusually wide spread between rate sources right now, and it matters which one is being quoted.

Freddie Mac's Primary Mortgage Market Survey is a weekly average collected from lenders. Mortgage News Daily runs a daily index built from lender rate sheets, and it read 7.22% on September 15. That is 27 basis points above this week's survey figure, and the gap partly reflects timing, since a weekly average smooths a week that a daily index tracks in real time, and partly reflects methodology.

Neither is wrong. A rate figure without its series named is what is wrong. Anyone comparing a quote from a lender against a headline number should know which of these the headline came from.

What does this mean for Florida buyers and sellers?

Florida enters the fall with rates at the top of the range they have held for two years and inventory falling. Florida Realtors reported single-family inventory down 13% year over year in August and condo and townhouse inventory down 11.5%, while the statewide single-family median price rose just over 1%.

For buyers, the practical effect of the last four weeks is that the same monthly budget now buys less house than it did in late August. Buyers working to a payment rather than a price will feel the 19 basis point week immediately.

For sellers, rising rates thin the buyer pool at the margin, which is what Florida Realtors' chief economist described when he said the recent rise in rates has been enough to slow home sales growth. Sellers in Miami, Orlando and Tampa are competing for a pool that shrinks slightly with each move like this one. The running statewide picture is on the Florida housing tracker.

Next week's survey, on September 24, will show whether this was a one-week repricing or the start of something steeper.

Limitations

The PMMS is a survey of lenders and reports averages, not quotes available to any individual borrower. An actual rate depends on credit score, down payment, loan size, property type, occupancy and points paid, and Florida borrowers in coastal counties face insurance and wind-mitigation requirements that affect qualification but not the rate itself.

The four-week series in this report covers only the weeks Freddie Mac's archive page displayed at the time of writing, which were the weeks ending August 27, September 3 and September 10, plus this week. No claim is made here about where 6.95% ranks within 2026 as a whole, because the full-year series was not retrieved.

The payment figures are this desk's own arithmetic on the published averages using a stated 20% down payment on Florida's August median price. They are principal and interest only. No causal link between the Federal Reserve's September 16 decision and this week's survey reading is asserted, and Freddie Mac asserts none.

Sources

Freddie Mac Primary Mortgage Market Survey, week ending September 17, 2026, freddiemac.com/pmms, including quoted commentary from Chief Economist Sam Khater. Confirmed against Freddie Mac's own release of the same survey issued September 17, 2026.

Freddie Mac PMMS archive page, freddiemac.com/pmms/pmms_archives, read September 17, 2026, for the weeks ending August 27, September 3 and September 10.

Florida Realtors, "Florida housing market levels off in August," published September 16, 2026, floridarealtors.org.

Mortgage News Daily 30-year fixed rate index, September 15, 2026.

Board of Governors of the Federal Reserve System, FOMC statement, September 16, 2026.

Disclosure: Jon Brooks is a co-founder of Momentum Realty, a Florida real estate brokerage that owns and funds Florida Housing Intelligence. Momentum has a financial interest in Florida real estate transactions, including in markets named here. See our editorial standards.