Last spring frost
Apr 10
Frost Dates for Heceta Beach, OR
First fall frost
Nov 15
Growing season
220 days
Hardiness zone
9a
In an average year around Heceta Beach, OR, the last spring frost (32°F) is about Apr 10 and the first fall frost is about Nov 15, giving roughly a 220-day growing season. To be safe most years, wait until Mar 6 before setting out tender plants.
Last spring frost
Dates the last frost of spring typically ends. Plant tender crops after the risk has passed for your comfort level.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | May 30 | May 8 | Apr 18 |
| Freeze (32°F) | May 5 | Apr 10 | Mar 6 |
| Hard (28°F) | Apr 1 | Feb 26 | Dec 25 |
| Severe (24°F) | Mar 13 | Jan 12 | Dec 4 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 30 | May 23 | May 17 | May 13 | May 8 | May 4 | Apr 30 | Apr 26 | Apr 18 |
| 32°F | May 5 | Apr 29 | Apr 22 | Apr 16 | Apr 10 | Apr 3 | Mar 29 | Mar 20 | Mar 6 |
| 28°F | Apr 1 | Mar 24 | Mar 14 | Mar 5 | Feb 26 | Feb 19 | Feb 12 | Jan 27 | Dec 25 |
| 24°F | Mar 13 | Feb 24 | Feb 16 | Feb 3 | Jan 12 | Dec 27 | Dec 20 | Dec 12 | Dec 4 |
| 20°F | Mar 23 | Mar 17 | Feb 18 | Dec 31 | Dec 24 | Dec 22 | Dec 18 | Dec 15 | Dec 8 |
First fall frost
Dates the first frost of fall typically arrives. Count back by a crop's days-to-maturity to know your planting cutoff.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Sep 17 | Oct 15 | Nov 9 |
| Freeze (32°F) | Oct 23 | Nov 15 | Dec 13 |
| Hard (28°F) | Nov 12 | Dec 12 | Feb 17 |
| Severe (24°F) | Nov 29 | Dec 23 | Mar 1 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 17 | Sep 27 | Oct 3 | Oct 10 | Oct 15 | Oct 21 | Oct 26 | Oct 31 | Nov 9 |
| 32°F | Oct 23 | Oct 31 | Nov 6 | Nov 10 | Nov 15 | Nov 22 | Nov 29 | Dec 4 | Dec 13 |
| 28°F | Nov 12 | Nov 23 | Dec 1 | Dec 6 | Dec 12 | Dec 21 | Jan 3 | Jan 29 | Feb 17 |
| 24°F | Nov 29 | Dec 6 | Dec 12 | Dec 17 | Dec 23 | Jan 9 | Feb 5 | Feb 16 | Mar 1 |
| 20°F | Dec 8 | Dec 14 | Dec 16 | Dec 20 | Dec 22 | Dec 25 | Feb 10 | Mar 1 | Mar 21 |
Growing season is measured at 32°F with about 50% probability. Hardiness zone from the 2023 USDA map; frost normals from NOAA 1991-2020.
Where this data comes from
@endif These dates are computed from the nearest official weather station with long-term records: Florence #2, Or, about 5.9 miles away@if(!empty($station['elevation_ft'])), at 75 ft elevation. The further the station and the greater the elevation difference from your yard, the more your local frost timing can vary.
How we calculate these dates
Frost and freeze dates come from the NOAA 1991–2020 U.S. Climate Normals, the National Oceanic and Atmospheric Administration's 30-year averages for each weather station. A date shown at the 50% level is the median: in half of years the frost falls on or before it. The 10% and 90% columns show the early and late ends of the range, so you can plant on the odds you're comfortable with. These are long-term averages, not a forecast for this year - always check your local outlook before planting.
Source: NOAA National Centers for Environmental Information, 1991–2020 Climate Normals (public domain). Harman is not affiliated with or endorsed by NOAA.
Frequently asked questions
When is the last frost in Heceta Beach, OR?
On average, the last spring frost (32°F) around Heceta Beach, OR is about Apr 10. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 6.
When is the first frost in the fall?
The first fall frost around Heceta Beach, OR typically arrives about Nov 15. Count back by a crop's days to maturity to find the latest date you can plant it.
When can I plant tomatoes and other tender crops?
Tender crops like tomatoes, peppers and basil are damaged by frost, so wait until the last spring frost has passed - around Apr 10 on average, or Mar 6 to be safe most years.
How long is the growing season here?
The frost-free growing season (between the last spring and first fall 32°F frost) is about 220 days in a typical year.
Are these dates a forecast for this year?
No. They are 30-year averages from the NOAA 1991–2020 Climate Normals, not a prediction for the current year. Use them for planning and always check your local weather forecast before planting or protecting crops.
Local weather for 97439 Planting calendar → Oregon frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026