Fall in zone 9aPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 98366 (Port Orchard, WA)
Average last spring and first fall frost dates with 10%, 50% and 90% odds, from NOAA's 1991–2020 climate normals for the nearest weather station, Bremerton, WA (5 miles away).
- Average last spring frostMar 2950% chance of a 32°F freeze after this date
- Average first fall frostNov 1450% chance of a 32°F freeze by this date
- Growing season (frost-free)227 daysmedian, 32°F threshold
- USDA hardiness zone9a20 to 25°F avg. coldest night
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This week in your yard
As of Oct 18, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Soil temperature now
2-inch depth
56°F 55°F or warmer
24-hour average · latest 55°F, as of Oct 18, 1:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Quinault 4 NE (58 mi).
4-inch depth
56°F 55°F or warmer
24-hour average · latest 55°F, as of Oct 18, 1:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Quinault 4 NE (58 mi).
Fall: Texas A&M AgriLife times fall pre-emergent (for winter weeds such as annual bluegrass) to soil cooling to about 70°F for several days. The 50–55°F band is the spring trigger. Always read and follow the product label.
7-day forecast and frost risk
The latest National Weather Service 7-day forecast and any Frost Advisory or Freeze Warning for 98366 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 56°F at 4 inches (estimated soil temperature, not a station reading). Fall pre-emergent (annual bluegrass, winter weeds): window open as soil cools through the 70s and 60s.
Fertilizer window
Lawn region: Pacific Northwest (west of the Cascades). Timing only; always follow the product label.
- Perennial ryegrass (cool-season): Early fall: September; Late fall: October–November; Overseeded Bermuda: Light feeding once the winter rye is established, if needed. Avoid: Summer feeding.
Plant now
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Nov 14: skip heavy pruning in the 6–8 weeks before it, because new growth may not harden off in time.
Spring-flowering shrubs are pruned right after their flowers fade, not by date. See the pruning guide.
Last spring frost odds
| Chance of a 32°F freeze after this date | Date |
|---|---|
| 90% (early: most years still freeze after this) | Mar 5 |
| 50% (the "average" last frost) | Mar 29 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 24 |
Most gardeners plant frost-tender crops (tomatoes, peppers, basil) after the 50% date, and closer to the 10% date for less risk.
First fall frost odds
| Chance the first 32°F freeze has happened by this date | Date |
|---|---|
| 10% (early: 1 year in 10 freezes this soon) | Oct 26 |
| 50% (the "average" first frost) | Nov 14 |
| 90% (late: most years have frozen by now) | Dec 1 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 25 | Oct 27 |
| 32°F (freeze) | Mar 29 | Nov 14 |
| 28°F (hard freeze) | Feb 27 | Nov 30 |
n/a means NOAA did not publish a date at that threshold for this station (usually because it rarely gets that cold).
Vegetable planting calendar for 98366
Dates count from your average last spring frost (Mar 29) and first fall frost (Nov 14). Half of years have a frost after the spring date, so give tender crops (tomatoes, peppers, squash) some slack.
| Crop | Start indoors | Spring planting | Fall planting |
|---|---|---|---|
| Tomato | Feb 1–15 | Apr 5–19 (transplant) | Jul 18–Aug 15 (transplant) |
| Pepper (sweet and hot) | Jan 18–Feb 1 | Apr 12–26 (transplant) | Jul 25–Aug 15 (transplant) |
| Eggplant | Jan 18–Feb 1 | Apr 12–26 (transplant) | Jul 25–Aug 15 (transplant) |
| Tomatillo | Feb 1–15 | Apr 5–19 (transplant) | – |
| Lettuce | Feb 1–15 | Mar 8–29 (transplant) Mar 1–Apr 12 (sow outdoors) | Sep 19–Oct 10 (transplant) Sep 5–Oct 3 (sowing) |
| Spinach | – | Feb 15–Mar 8 (sow outdoors) | Sep 19–Oct 10 (sowing) |
| Kale | Feb 1–15 | Mar 1–15 (transplant) Mar 1–15 (sow outdoors) | Aug 22–Sep 19 (transplant) Aug 8–Sep 5 (sowing) |
| Collards | Feb 1–15 | Mar 1–29 (transplant) Mar 1–29 (sow outdoors) | Aug 22–Sep 19 (transplant) Aug 8–Sep 5 (sowing) |
| Broccoli | Jan 18–Feb 1 | Mar 1–15 (transplant) | Aug 8–Sep 5 (transplant) |
| Cabbage | Jan 18–Feb 1 | Mar 1–15 (transplant) | Aug 8–Sep 5 (transplant) |
| Cauliflower | Jan 18–Feb 1 | Mar 15–29 (transplant) | Aug 8–Sep 5 (transplant) |
| Brussels sprouts | Jan 4–18 | Mar 1–15 (transplant) | Jul 25–Aug 15 (transplant) |
| Kohlrabi | Feb 1–15 | Mar 1–15 (transplant) Mar 1–15 (sow outdoors) | Sep 5–19 (sowing) |
| Bok choy / Asian greens | – | Mar 1–15 (sow outdoors) | Sep 19–Oct 3 (sowing) |
| Arugula | – | Mar 1–29 (sow outdoors) | Sep 19–Oct 17 (sowing) |
| Mustard greens | – | Mar 1–22 (sow outdoors) | Sep 19–Oct 3 (sowing) |
| Swiss chard | Feb 15–Mar 1 | Mar 15–Apr 5 (transplant) Mar 15–Apr 12 (sow outdoors) | Sep 5–19 (sowing) |
| Beet | – | Mar 1–29 (sow outdoors) | Sep 5–19 (sowing) |
| Carrot | – | Mar 8–Apr 5 (sow outdoors) | Aug 22–Sep 5 (sowing) |
| Radish | – | Feb 22–Apr 5 (sow outdoors) | Oct 3–17 (sowing) |
| Turnip | – | Mar 1–22 (sow outdoors) | Sep 5–19 (sowing) |
| Parsnip | – | Mar 8–29 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 1–Mar 1 (sow outdoors) | Aug 22–Sep 5 (sowing) |
| Onion (bulbing) | Jan 4–18 | Feb 15–Mar 1 (transplant) | – |
| Green onion / scallion | – | Feb 15–Mar 15 (sow outdoors) | Sep 5–19 (sowing) |
| Leek | Jan 4–18 | Mar 1–15 (transplant) | – |
| Garlic | – | – | Oct 3–31 (sowing) |
| Shallot | – | Feb 15–Mar 1 (transplant) | Oct 3–31 (sowing) |
| Potato | – | Mar 1–15 (transplant) | Jul 25–Aug 8 (transplant) |
| Sweet potato | – | Apr 19–May 3 (transplant) | – |
| Sweet corn | – | Apr 5–19 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 5–19 (sow outdoors) | Aug 22–Sep 5 (sowing) |
| Bean, pole | – | Apr 5–19 (sow outdoors) | – |
| Lima bean | – | Apr 12–26 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Apr 19–May 10 (sow outdoors) | – |
| Cucumber | Mar 1–8 | Apr 5–19 (transplant) Apr 5–19 (sow outdoors) | Aug 22–Sep 5 (sowing) |
| Summer squash / zucchini | Mar 1–8 | Apr 5–19 (transplant) Apr 5–19 (sow outdoors) | Aug 22–Sep 5 (sowing) |
| Winter squash | Mar 1–8 | Apr 5–19 (transplant) Apr 5–19 (sow outdoors) | – |
| Pumpkin | – | Apr 5–19 (sow outdoors) | – |
| Watermelon | Mar 1–8 | Apr 12–26 (transplant) Apr 12–26 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 1–8 | Apr 12–26 (transplant) Apr 12–26 (sow outdoors) | – |
| Okra | Feb 15–Mar 1 | Apr 12–26 (transplant) Apr 12–26 (sow outdoors) | – |
| Celery | Jan 4–18 | Apr 5–12 (transplant) | – |
| Basil | Feb 15–Mar 1 | Apr 5–19 (transplant) Apr 5–19 (sow outdoors) | – |
| Cilantro | – | Mar 15–Apr 12 (sow outdoors) | Sep 19–Oct 3 (sowing) |
| Parsley | Jan 18–Feb 1 | Mar 15–29 (transplant) Mar 8–29 (sow outdoors) | – |
| Dill | – | Mar 29–Apr 12 (sow outdoors) | Sep 19–Oct 3 (sowing) |
| Sunflower | – | Mar 29–Apr 12 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 1–15 (transplant) | – |
| Rhubarb (crowns) | – | Mar 1–15 (transplant) | – |
| Strawberry (plants) | – | Mar 1–15 (transplant) | Sep 5–Oct 3 (transplant) |
Typical ranges from university extension planting calendars, adjusted to your frost dates. Probabilities, not guarantees. Fall windows that would overlap spring planting are left out, as are fall crops of frost-tender plants where the frost-free season is under 210 days.
Where these numbers come from
Station: Bremerton, WA (NOAA GHCN-Daily ID USC00450872), elevation 110 ft, 5.3 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Seattle Boeing Fld, WA | 13 mi | Mar 13 | Nov 17 |
| Seattle Tacoma Intl AP, WA | 14 mi | Mar 2 | Nov 23 |
| Renton Muni AP, WA | 17 mi | Mar 13 | Nov 16 |
The average last-frost dates of these stations span 27 days, a rough guide to local variation. See data sources & methods.
Frost questions for 98366
When is the last frost in 98366?
The average (50% chance) last spring freeze of 32°F for ZIP 98366 is March 29. For a more cautious planting date, use April 24, when only 1 year in 10 still sees a later freeze.
When is the first frost in 98366?
The average first fall freeze is November 14. In 1 year in 10 it comes by October 26.
What hardiness zone is 98366?
ZIP 98366 is in USDA zone 9a (20 to 25°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 98366 right now?
This page shows the latest 2-inch and 4-inch soil temperature from the nearest public soil station (USDA SCAN, NOAA USCRN or TexMesonet), or a labeled estimate when no station is close, against the 50–55°F spring pre-emergent band.
Nearby ZIP codes
98337 Bremerton 98314 Bremerton 98310 Bremerton 98353 98311 Tracyton 98367 Port Orchard 98110 Bainbridge Island 98359 Burley
Other ZIP codes in Kitsap County
98110 98310 98311 98312 98314 98315 98337 98340 98342 98345 98346 98353 98359 98364 98367 98370 98380 98383 98392 All Kitsap County frost dates · Washington frost dates
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Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
- Freeze alerts
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Free. One weekly email plus alerts when your ZIP has a frost or a soil-temperature change worth acting on. After you submit, Kit (our email provider) sends a confirmation email: check your email and click the link to confirm. You aren't subscribed until you do. We collect only your email address and ZIP, sent to Kit to deliver The Dial. Unsubscribe anytime.