Belfair, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Belfair, a community in Mason County, Washington.
Today
74°F
Mostly Sunny
Mostly sunny, with a high near 74. South southeast wind around 3 mph.
7-day forecast for Belfair
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Mostly Sunny | 3 mph SSE | 0% |
| Tonight | 51°F | Mostly Clear | 0 to 3 mph NE | 0% |
| Sunday | 75°F | Mostly Sunny | 0 to 5 mph NNE | 0% |
| Sunday Night | 50°F | Mostly Clear | 0 to 5 mph NNE | 0% |
| Monday | 73°F | Partly Sunny | 0 to 5 mph ESE | 0% |
| Monday Night | 50°F | Partly Cloudy | 0 to 5 mph NNE | 1% |
| Tuesday | 70°F | Partly Sunny | 0 to 3 mph S | 1% |
| Tuesday Night | 48°F | Mostly Cloudy | 0 to 3 mph NW | 4% |
| Wednesday | 68°F | Partly Sunny | 0 to 6 mph SSW | 7% |
| Wednesday Night | 50°F | Mostly Cloudy | 1 to 6 mph NNW | 7% |
| Thursday | 65°F | Mostly Cloudy then Slight Chance Light Rain | 1 to 7 mph NNE | 22% |
| Thursday Night | 48°F | Chance Light Rain | 1 to 7 mph N | 28% |
| Friday | 65°F | Mostly Sunny | 1 to 7 mph ENE | 13% |
| Friday Night | 47°F | Partly Cloudy | 2 to 7 mph N | 10% |
Forecast source: National Weather Service (api.weather.gov) for Belfair (47.447, -122.853). Updated through the day.
Growing snapshot for Belfair
Last spring frost
Mar 29
First fall frost
Nov 14
Growing season
227 days
Hardiness zone
8b
More local growing data for Belfair: nearby ZIP 98528 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Bremerton, Wa (13 mi from Belfair). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.