RentCafe reported on September 21, 2026 that U.S. self-storage street rates averaged $134 per month in August 2026, down 2.2% year over year and 0.7% from July, with roughly 71% of the 150 largest cities posting annual declines. The bulletin is the consumer-facing mirror to Yardi Matrix's 1.9% advertised-rate drop published two days later: occupancy may have stabilized, but the price to win the next tenant still moved backward at summer's end.
What Did RentCafe Measure in August 2026?
RentCafe Self Storage publishes a monthly analysis of street rates and forecasted construction across the 150 largest U.S. cities, using Yardi Matrix-sourced rent and supply data. The August 2026 edition, released September 21, frames the month as a reversal after "some signs of stabilization during the previous few months."
The national headline blends unit sizes into a single average monthly rent. That $134 figure is not a 10x10 quote; it is a weighted composite across markets and unit types. Still, direction matters for operators setting move-in specials and for investors comparing August 2026 performance against 2025 comps.
| Metric | August 2026 reading |
|---|---|
| National average street rate | $134/month |
| Year-over-year change | -2.2% |
| Month-over-month change | -0.7% |
| Cities with YoY declines (top 150) | ~71% |
| Report publication date | September 21, 2026 |
Why Did Street Rates Slide After a Softer July?
RentCafe cited three overlapping pressures: inventory still working through lease-up, weak housing turnover, and seasonal demand fading as peak moving season closed.
That matches what REITs described on Q2 2026 earnings calls. Same-store revenue guidance improved because move-outs fell, not because move-in volume surged. Street rates reflect competitive fill pricing for new customers, so they can stay negative while in-place rent rolls look flatter.
Marcus & Millichap's September 2026 outlook forecasts national vacancy improving 20 basis points to 10% by year-end 2026 as deliveries slow to 2.2% of inventory. RentCafe's August street data says that supply relief has not yet translated into broad pricing power at the door.
Which Markets Still Dominate the 2026 Delivery List?
RentCafe's construction section highlights Florida's continued pipeline weight even as national development slows.
Jacksonville leads the national ranking with approximately 705,000 square feet scheduled for 2026, equal to about 6.6% of current inventory. Cape Coral shows the largest proportional expansion among major markets: 473,000 square feet set to deliver against 9.37 square feet per capita, more than 20% of existing stock. Miami adds 379,000 square feet against a tighter 3.97 square feet per capita base. Orlando contributes another 310,000 square feet.
The contrast is the story. Miami's pipeline serves a relatively supply-constrained market. Cape Coral's delivery wave lands on an already generous per-capita base, consistent with Southwest Florida rate divergence data that showed Naples commanding premium walk-in rates while Cape Coral absorbed hundreds of thousands of square feet of new space.
CRE Daily's September 24 summary of Yardi Matrix supply data adds national context: under-construction stock fell to 2.1% of inventory by August 2026, but three-year deliveries still equal 8.8% of starting stock. RentCafe's city-level delivery table explains why national averages can improve on the supply line while individual Sun Belt operators still fight for move-ins.
How Should Operators Read $134 Against Broker and REIT Data?
Street rates, advertised rates, and in-place achieved rent are three different series.
RentCafe's $134 street average declined 2.2% year over year in August. Yardi Matrix's $16.39 per square foot advertised average declined 1.9% over the same month. REIT same-store revenue guidance moved up in July earnings because legacy tenants stayed longer, not because August street specials strengthened.
Operators underwriting 2027 budgets should model:
- Move-in rate off street/advertised benchmarks (still negative nationally in August).
- Retention as the occupancy lever (positive at public REITs in Q2).
- Local delivery tables from RentCafe and Yardi, not the national average alone.
A stabilized 90%-plus occupied store in Indianapolis can raise effective revenue while a 2025 vintage lease-up in Tampa Race Track corridor competes with developer exits at 86% physical occupancy.
What Does August 2026 Imply for Fall Lease-Up Strategy?
RentCafe closed the report by noting August marks the end of peak moving season. Broad rate softness persisted despite selective city-level stabilization earlier in summer.
Practical implications:
Discounting stays rational in high-delivery MSAs. Cape Coral's proportional pipeline and Jacksonville's absolute volume keep competitive pressure alive into 2027.
Secondary markets with sub-7 SF/capita can still work. List Self Storage's mid-September deal tape showed buyers paying for tight supply in Kirkland and Waltham while Monroe, Georgia, traded at 17.3 square feet per capita in lease-up. RentCafe's 71% decline share confirms the national average hides both stories.
Retention marketing is not optional. If street rates fall 2.2% annually while move-outs improve, the margin fight shifts to keeping existing tenants on escalators rather than winning price wars for the next lead.
The Numbers Worth Writing Down
- Report date: September 21, 2026 (RentCafe)
- Data month: August 2026
- National street rate: $134/month average unit
- YoY street rate change: -2.2%
- MoM street rate change: -0.7%
- Cities with YoY declines: ~71% of top 150
- Jacksonville 2026 scheduled deliveries: ~705,000 SF (~6.6% of inventory)
- Cape Coral 2026 scheduled deliveries: 473,000 SF (>20% of inventory proportionally)
- Miami 2026 scheduled deliveries: 379,000 SF (3.97 SF/capita market)
- Orlando 2026 scheduled deliveries: 310,000 SF
National Averages Lie; Local Tables Decide
August 2026 was not a demand collapse. It was a pricing report card after years of deliveries and a housing market that will not turn over.
RentCafe's $134 national average is the scoreboard. Jacksonville, Cape Coral, and the other city lines in the same bulletin are the playbook. Operators who only watch REIT occupancy prints will miss why street rates still print red while move-outs improve.
Sources
- August 2026 self storage report: Rents fall 2.2% annually as most major cities post street rate declines, RentCafe, September 21, 2026
- Yardi Matrix September 2026 Advertised Rates, Your CAIO
- Self Storage Rents Slide as Supply Pipeline Contracts, CRE Daily, September 24, 2026
- Marcus & Millichap U.S. Self-Storage Outlook September 2026, Your CAIO
- Southwest Florida Self-Storage Rate Divergence, Your CAIO