San Francisco Oceanside, CA Frost Dates & Growing Season

The two dates every San Francisco Oceanside garden is planned around, plus ready-computed planting windows for the most popular crops.

Last spring frost
Dec 30
~50% chance of frost after
First fall frost
Dec 25
~50% chance of frost before
Growing season
360 days
frost-free stretch
USDA zone
≈ 10b
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Dec 2 Dec 30 Mar 13
First fall frost Feb 13 Dec 25 Nov 26

Computed from NOAA 1991–2020 climate normals at the SAN FRANCISCO OCEANSIDE station. "Safe" means frost past that date happens only about one year in ten. Your exact garden can still run days either way with elevation and terrain — check your own ZIP with the frost date lookup.

Planting windows for San Francisco Oceanside

Computed from San Francisco Oceanside's own frost dates. Click any crop for the full zone-10 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Nov 4 – Nov 18 Jan 6 – Jan 13
🫑 Peppers Oct 21 – Nov 4 Jan 13 – Jan 20
🥬 Lettuce Nov 18 – Dec 2 Dec 2 – Dec 16 Dec 2 – Dec 30
🫛 Peas Nov 18 – Dec 2
🥕 Carrots Dec 9 – Dec 30
🥦 Broccoli Nov 11 – Nov 25 Dec 9 – Dec 23
🥬 Kale Nov 18 – Dec 2 Dec 2 – Dec 16 Dec 2 – Dec 16
🥒 Cucumbers Dec 2 – Dec 9 Jan 6 – Jan 13 Jan 6 – Jan 13
🥒 Zucchini Dec 2 – Dec 9 Jan 6 – Jan 13 Jan 6 – Jan 13
🫘 Green Beans (Bush) Jan 6 – Jan 13
🌽 Sweet Corn Jan 6 – Jan 13
🌿 Basil Nov 18 – Dec 2 Jan 6 – Jan 13 Jan 13 – Jan 20
🧄 Garlic Fall: Nov 13 – Dec 11

Want this for all 50 crops, or as a printable seed-shelf schedule? Use the planting calendar and the seed starting scheduler — both can use San Francisco Oceanside's dates automatically after a lookup.

Reading the season in San Francisco Oceanside

With roughly 360 frost-free days, San Francisco Oceanside gardens fit long-season crops — melons, winter squash, sweet potatoes — with room left for spring and fall rounds of greens and roots. The first frost around Dec 25 is late enough that fall planting is a full second season, not an afterthought.

Frequently asked questions

When is the last frost in San Francisco Oceanside, CA?

The average last spring frost in San Francisco Oceanside is around Dec 30, based on 1991–2020 climate normals. That's a median — about half of years see a later frost, so tender crops are safest going out a week or two after this date.

When is the first frost in San Francisco Oceanside, CA?

The average first fall frost in San Francisco Oceanside arrives around Dec 25. Crops still in the garden need to mature before then, and frost-tender plants need harvesting or protection as the date approaches.

How long is the growing season in San Francisco Oceanside?

About 360 frost-free days on average, from Dec 30 to Dec 25. That comfortably fits long-season crops like melons and winter squash, plus spring and fall plantings of cool-season vegetables.

What USDA zone is San Francisco Oceanside in?

USDA zone 10b on the 2023 Plant Hardiness Zone Map. Note that zones describe winter cold, not frost timing — these frost dates are the numbers to plan plantings around.