When to plant in Newport Beach, CA
USDA Zone 10bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Newport Beach, California — all computed from Newport Beach's nearest NOAA weather station.
With only about -4 frost-free days, Newport Beach has a short season — start heat-lovers indoors early, favor quick-maturing varieties, and use row cover to stretch both ends. Zone 10b is warm enough that Newport Beach can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
Frost probability
LAGUNA BEACH · 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 Newport Beach’s own odds, recorded at LAGUNA BEACH.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Feb 28 | Jan 30 | Dec 26 | Dec 1 | Dec 26 | Feb 2 |
| 32°F | Feb 11 | Jan 6 | Dec 13 | Dec 12 | Jan 2 | Feb 8 |
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 Newport Beach, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 44 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.
Newport Beach planting FAQ
When is the last spring frost in Newport Beach, CA?
On average, the last spring frost in Newport Beach is around January 6 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in Newport Beach, CA?
Expect Newport Beach's first fall frost near January 2 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Newport Beach in?
Newport Beach is in USDA hardiness zone 10b. In zone 10b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Newport Beach?
There are roughly -4 frost-free days in Newport Beach (a short growing season), running from the average last frost around January 6 to the first fall frost near January 2.
When should I plant tomatoes in Newport Beach?
In Newport Beach, start tomato seeds indoors around November 11–November 25, then transplant seedlings outdoors around January 13 once the danger of frost has passed.
Never miss a window in Newport Beach
An email when it’s time to start seeds, transplant, and sow — timed to Newport Beach’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Costa Mesa · 6 km
- Irvine · 10 km
- Fountain Valley · 12 km
- Santa Ana · 12 km
- Laguna Woods · 13 km
- Tustin · 13 km
- Laguna Beach · 13 km
- Aliso Viejo · 14 km
Frost dates recorded at LAGUNA BEACH, 12 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 Newport Beach, CA — Frost Dates & Zone 10b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00044647. Retrieved from https://blissgarden.com/california/newport-beach.