Bremerton, WA 98380 Frost Dates
Frost dates for Bremerton, WA, ZIP 98380
Typically, the last spring freeze lands around 03/29, roughly 213 days out. The first fall frost typically arrives around 11/14, about 227 frost-free days later.
Bremerton sits in USDA Zone 8b (15 to 20°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 8b around Bremerton has about 11 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Bremerton's last frost
03/29 is the middle of 30 years of NOAA records, not a promise. Plant by 03/05 and you're betting against frost in roughly 9 years out of 10. 04/24 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Bremerton compares
At roughly 227 frost-free days, Bremerton places 10,951 of 40,283 ZIP codes in this dataset. Within WA, it ranks 185 of 700.
Learn more
local microclimates explains what one yard in Bremerton can differ from the 98380 normal, and zone vs. frost date explains why Zone 8b and Bremerton's frost date answer different questions.