Roche Harbor, WA Weather & Growing Conditions
Today
68°F
Partly Sunny
Partly sunny, with a high near 68. South southeast wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 68°F | Partly Sunny | 2 mph SSE | 0% |
| Tonight | 54°F | Partly Cloudy | 2 mph SE | 0% |
| Sunday | 68°F | Partly Sunny | 2 mph NW | 0% |
| Sunday Night | 54°F | Partly Cloudy | 2 mph SW | 0% |
| Monday | 69°F | Mostly Sunny | 2 mph S | 0% |
| Monday Night | 55°F | Partly Cloudy | 2 mph WSW | 0% |
| Tuesday | 68°F | Partly Sunny | 1 to 5 mph SW | 0% |
| Tuesday Night | 53°F | Mostly Cloudy | 5 mph SSW | 7% |
| Wednesday | 65°F | Partly Sunny | 5 mph SSW | 12% |
| Wednesday Night | 53°F | Mostly Cloudy | 3 mph WSW | 11% |
| Thursday | 64°F | Partly Sunny | 2 to 7 mph NW | 14% |
| Thursday Night | 53°F | Mostly Cloudy | 5 mph WNW | 14% |
| Friday | 64°F | Mostly Sunny | 5 to 9 mph NW | 13% |
| Friday Night | 52°F | Partly Cloudy | 6 mph NW | 10% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Roche Harbor, WA
Last spring frost
Mar 26
First fall frost
Nov 10
Growing season
230 days
Hardiness zone
9a
Explore more for Roche Harbor, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Friday Harbor Ap, Wa (6.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.