Bremerton, WA 98555 Frost Dates
Frost dates for Bremerton, WA, ZIP 98555
Typically, the last spring freeze lands around 03/24, roughly 208 days out. The first fall frost typically arrives around 11/15, about 235 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.
Why 03/24 isn't a guarantee
03/24 is the middle of 30 years of NOAA records, not a promise. Plant by 02/26 and you're betting against frost in roughly 9 years out of 10. 04/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Bremerton compares
Bremerton's growing season runs about 235 days, ranking 9,556 of 40,283 US ZIP codes measured here, longest to shortest. Within WA, it ranks 164 of 700.
Learn more
the frost range explains how to read the range around Bremerton's dates instead of trusting one, and local microclimates explains what one yard in Bremerton can differ from the 98555 normal.