Roche Harbor, WA Weather & Growing Conditions
Today
79°F
Sunny
Sunny, with a high near 79. North wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Sunny | 7 mph N | 0% |
| Tonight | 61°F | Patchy Smoke | 0 to 6 mph NW | 0% |
| Wednesday | 82°F | Sunny | 3 to 7 mph NNW | 0% |
| Wednesday Night | 61°F | Mostly Clear | 0 to 3 mph NW | 0% |
| Thursday | 82°F | Sunny | 0 to 3 mph NW | 0% |
| Thursday Night | 61°F | Mostly Clear | 2 mph SSW | 0% |
| Friday | 81°F | Sunny | 3 mph SSW | 0% |
| Friday Night | 59°F | Mostly Clear | 0 to 3 mph SW | 0% |
| Saturday | 75°F | Sunny | 0 to 3 mph SSW | 0% |
| Saturday Night | 58°F | Mostly Clear | 3 mph WSW | 0% |
| Sunday | 73°F | Sunny | 3 mph SW | 0% |
| Sunday Night | 57°F | Mostly Clear | 3 mph WSW | 1% |
| Monday | 73°F | Mostly Sunny | 5 mph WSW | 1% |
| Monday Night | 57°F | Partly Cloudy | 3 mph SW | 1% |
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 Aug 4, 2026.