When to plant in Seaside, CA
USDA Zone 10aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Seaside, California — all computed from Seaside's nearest NOAA weather station.
Seaside enjoys a long ~355-day frost-free season — you can succession-sow, fit in a second crop, and grow long-season heat-lovers with room to spare. In zone 10a, frost is a minor factor for Seaside — most perennials thrive, and annual vegetables can go out early and stay late.
The average last spring frost in Seaside is now 8 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
MONTEREY PENINSUL AP · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Seaside’s own odds, recorded at MONTEREY PENINSUL AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Mar 11 | Jan 27 | Dec 27 | Nov 18 | Dec 7 | Jan 3 |
| 32°F | Jan 20 | Jan 2 | Dec 6 | Dec 1 | Dec 23 | Jan 12 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Nothing new to sow or transplant outdoors in the next few weeks — a seasonal lull. Check the full-year calendar below for the next window.
Full-year planting calendar
Each bar is the exact window to take a planting action in Seaside, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 9 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Seaside planting FAQ
When is the last spring frost in Seaside, CA?
Plan for the last spring frost in Seaside around January 2 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Seaside, CA?
Expect Seaside's first fall frost near December 23 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Seaside in?
Seaside is in USDA hardiness zone 10a. In zone 10a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Seaside?
Seaside has about 355 frost-free days — a long growing season — between the average last spring frost (January 2) and first fall frost (December 23).
When should I plant tomatoes in Seaside?
For Seaside, sow tomatoes indoors about November 7–November 21 and move the seedlings out around January 9, after the last spring frost.
Never miss a window in Seaside
An email when it’s time to start seeds, transplant, and sow — timed to Seaside’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Monterey · 6 km
- Marina · 7 km
- Pacific Grove · 10 km
- Salinas · 18 km
- Prunedale · 25 km
- Watsonville · 33 km
- Live Oak · 43 km
- Soquel · 43 km
Frost dates recorded at MONTEREY PENINSUL AP, 5 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Seaside, CA — Frost Dates & Zone 10a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00023259. Retrieved from https://blissgarden.com/california/seaside.