California Mortgage Rate Update — Week of August 25, 2026

Published every Friday. Current as of market close, August 28, 2026.

Where Rates Are Right Now

Freddie Mac’s Primary Mortgage Market Survey came out Thursday morning showing the 30-year fixed rate at 6.66% — down slightly from the prior week and the lowest read in several months. The 5/1 ARM came in at 6.22%.

Here’s the full rate picture across loan types for California buyers this week:

My Read on the Week

The 6.66% headline is real, but I want to be direct about what it means in practice. That’s the Freddie Mac survey average, which lags actual market rates by a few days and represents a blend of borrower profiles. Well-qualified buyers on conforming loans are seeing rates in the 6.50–6.60% range with normal points. The 6.66% is a reasonable benchmark but not the floor.

What moved this week: Treasury yields pulled back slightly on softer-than-expected economic data. The 10-year Treasury, which mortgage rates closely track, drifted down toward 4.20% mid-week. That’s the driver behind the small improvement we saw in the Freddie Mac number.

The ARM market is interesting right now. At 6.22% for a 5/1 ARM versus 6.66% for a 30-year fixed, the spread is 44 basis points. That’s not a dramatic spread historically, but for a buyer who knows they’re going to sell or refinance within 5–7 years — which describes a lot of California move-up buyers — the ARM still makes mathematical sense. The savings in years 1–5 are real.

Payment Math This Week

A quick reality check on what these rates mean in dollar terms:

• $700,000 loan at 6.66%: $4,510/month (principal + interest)
• $700,000 loan at 6.50%: $4,424/month (with points or strong profile)
• $1M loan at 6.90%: $6,598/month
• $1M loan at 6.66%: $6,443/month ($155/month difference from a 0.24% rate difference)

That last example is why shopping lenders on a California jumbo matters. A 0.25% rate difference on a $1M loan is $1,860/year. On a 5-year hold, that’s $9,300. It’s worth making two or three calls.

One Situation I’m Tracking

I’ve had several inquiries this week from buyers whose offers are contingent on selling a current home first. The question I’m getting: “Should we lock now, or wait to see if rates drop more before we’re under contract?”

My honest answer is that no one knows where rates go next. The data this week was modestly positive but didn’t move the needle dramatically. If you’re in a transaction, locking when you’re under contract still makes more sense than floating and hoping. If you’re still in the pre-shopping phase, rates are meaningfully better than they were at 7.75% in late 2024 — the math has improved significantly for buyers who were sidelined last year.

That’s the week. If you have questions about rates for a specific loan situation, call or text me directly.

— Michael DiVita, DiVita Home Finance
📞 (800) 239-1103 | 💬 (310) 849-9124

Frequently Asked Questions

What is the 30-year mortgage rate in California this week?

As of August 28, 2026, the Freddie Mac national average 30-year fixed rate is 6.66%. Well-qualified California buyers on conforming loans are seeing rates in the 6.50–6.75% range depending on credit, LTV, and lender.

Should I lock my mortgage rate or wait for lower rates?

If you’re under contract, locking removes uncertainty. Rates can move in either direction — locking at today’s rate protects you from increases while you complete due diligence and close. If you’re in the early stages and your timeline is flexible, floating is lower risk but with no guarantee of improvement.

Are ARM rates worth it in California in 2026?

The 5/1 ARM at 6.22% vs. the 30-year fixed at 6.66% represents a 44-basis-point spread. For buyers who plan to sell or refinance within 5–7 years, the ARM typically saves meaningful money. For buyers planning a 10+ year hold, the certainty of a fixed rate usually makes more sense.