Sanibel, FL frost dates
Frost is light and occasional here — typically a few cold nights around midwinter (about 0 a year). Cover tender plants when frost is forecast.
How Sanibel compares
- In a typical year, frost nights in Sanibel fall between January 13 and January 16. In 1 year in 10 the first frost comes as early as December 31, or the last frost as late as February 2.
- Sanibel shares its weather station with Cape Coral, FL, 23 km away, so the two have the same frost dates.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | January 1 |
| 50% (median) | January 16 |
| 10% (safe for tender plants) | February 2 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | December 31 |
| 50% (median) | January 13 |
| 90% (late) | February 2 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Gardening where frost is rare
Sanibel, FL only freezes on a few winter nights, so the usual "plant after the last frost" rule doesn't apply. Heat and rainfall decide the seasons instead:
- Cool-season crops (lettuce, broccoli, peas, carrots) grow best from fall through late winter.
- Warm-season crops (tomatoes, peppers, beans, squash) do best planted in late winter to spring, and again in late summer for a fall crop — midsummer heat can stop tomatoes setting fruit.
- Heat lovers (okra, sweet potatoes, melons) can be planted through spring and early summer.
About these dates
Based on 1991–2020 NOAA climate normals for the Ft Myers Page Fld Ap, FL weather station, 27 km away (elevation 16 ft (5 m)).
Frost dates near Sanibel
- Saint James City Jan 16 · Jan 13
- Captiva Jan 16 · Jan 13
- Fort Myers Beach Jan 16 · Jan 13
- Cape Coral Jan 16 · Jan 13
- Pineland Jan 16 · Jan 13
- Bokeelia Jan 16 · Jan 13
- Fort Myers Jan 16 · Jan 13
- Estero Jan 17 · Jan 16
- Bonita Springs Jan 17 · Jan 16
- North Fort Myers Jan 16 · Jan 13
Frequently asked questions
When is the last frost in Sanibel, FL?
The median last spring frost in Sanibel, FL is January 16. There is still about a 10% chance of frost after February 2, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Sanibel, FL?
The median first fall frost is January 13, with about a 10% chance of frost before December 31.
How long is the growing season in Sanibel, FL?
About 362 days between the median last spring frost and first fall frost.
What planting zone is Sanibel, FL?
Sanibel, FL is in USDA hardiness zone 10b.