Friday Harbor, WA Weather & Growing Conditions
Today
67°F
Partly Sunny
Partly sunny. High near 67, with temperatures falling to around 65 in the afternoon. South southwest wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 67°F | Partly Sunny | 3 mph SSW | 0% |
| Tonight | 50°F | Mostly Clear | 1 mph SE | 0% |
| Sunday | 67°F | Mostly Sunny | 0 to 3 mph S | 0% |
| Sunday Night | 51°F | Mostly Cloudy | 1 mph WNW | 0% |
| Monday | 68°F | Partly Sunny | 0 to 3 mph SSW | 0% |
| Monday Night | 52°F | Partly Cloudy | 0 to 3 mph SW | 0% |
| Tuesday | 67°F | Partly Sunny | 0 to 6 mph SSW | 0% |
| Tuesday Night | 52°F | Partly Cloudy | 1 to 6 mph SSW | 12% |
| Wednesday | 65°F | Partly Sunny | 1 to 5 mph S | 12% |
| Wednesday Night | 51°F | Mostly Cloudy | 0 to 3 mph WSW | 9% |
| Thursday | 63°F | Partly Sunny | 0 to 6 mph NNW | 14% |
| Thursday Night | 51°F | Mostly Cloudy then Slight Chance Light Rain | 1 to 5 mph NW | 21% |
| Friday | 64°F | Slight Chance Light Rain then Partly Sunny | 2 to 7 mph WNW | 21% |
| Friday Night | 50°F | Partly Cloudy | 2 to 6 mph W | 11% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Friday Harbor, WA
Last spring frost
Feb 26
First fall frost
Nov 29
Growing season
276 days
Hardiness zone
9a
Explore more for Friday Harbor, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Olga 2 Se, Wa (3.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.