Belfair, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Belfair, a community in Mason County, Washington.
Overnight
36°F
Patchy Fog
Patchy fog. Mostly cloudy, with a low around 36. Wind around 0 mph.
7-day forecast for Belfair
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 36°F | Patchy Fog | 0 mph | 0% |
| Wednesday | 57°F | Patchy Fog then Light Rain | 0 to 10 mph S | 85% |
| Wednesday Night | 43°F | Light Rain then Mostly Cloudy | 9 to 15 mph SSW | 98% |
| Thursday | 57°F | Mostly Sunny | 12 mph SSW | 5% |
| Thursday Night | 42°F | Light Rain | 10 mph SSW | 89% |
| Friday | 55°F | Light Rain | 8 to 16 mph SSW | 89% |
| Friday Night | 45°F | Light Rain Likely | 1 to 8 mph SSW | 73% |
| Saturday | 61°F | Chance Light Rain | 1 to 8 mph SSW | 53% |
| Saturday Night | 47°F | Light Rain | 8 to 20 mph SSW | 85% |
| Sunday | 55°F | Light Rain Likely | 8 to 16 mph SSW | 61% |
| Sunday Night | 39°F | Slight Chance Light Rain | 1 to 8 mph WSW | 15% |
| Monday | 55°F | Chance Light Rain | 1 to 6 mph ESE | 47% |
| Monday Night | 43°F | Light Rain Likely | 6 to 9 mph SSW | 65% |
| Tuesday | 56°F | Light Rain Likely | 8 to 13 mph SSW | 65% |
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 Nov 4, 2026.