Seminole County Power Outage History
2014–2025 · Florida
Bottom 20% least reliable nationally — frequent and/or long outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Sep 10, 2017 | 243 hrs | 198,450 (80%) | Hurricane Irma |
| Sep 28, 2022 | 156 hrs | 136,129 (55%) | Hurricane Ian |
| Oct 9, 2024 | 128 hrs | 90,312 (36%) | Hurricane Milton |
| Oct 7, 2016 | 41 hrs | 73,595 (30%) | Hurricane Matthew |
| Nov 10, 2022 | 39 hrs | 32,973 (13%) | Hurricane Nicole |
Over the 12 years from 2014 to 2025, Seminole County recorded 2,226 distinct power outage events, averaging 1.9 hours per event.
The single worst outage on record in Seminole County started September 10, 2017 (Hurricane Irma), lasting 243 hours and leaving up to 198,450 customers without power (80% of the county) at its peak.
June has historically been the worst month for outages in Seminole County, with 278 events recorded during that month across the dataset.
Based on this history, Seminole County earns a Reliability Grade of F, placing it in the 13th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Florida
Counties with the closest reliability grade and national percentile to Seminole County.
| County | Grade | National percentile |
|---|---|---|
| Gadsden County | F | 13th |
| Collier County | F | 13th |
| Leon County | F | 14th |
| Hardee County | F | 12th |
| DeSoto County | F | 12th |
FAQ
How often does power go out in Seminole County?
Between 2014 and 2025, Seminole County recorded 2,226 outage events, averaging 1.9 hours each.
What is Seminole County's reliability grade?
Seminole County has a Reliability Grade of F, in the 13th national percentile.
What was the worst power outage in Seminole County?
The worst outage on record started September 10, 2017 (Hurricane Irma), lasting 243 hours and affecting up to 198,450 customers.