Friday Harbor, WA Weather & Growing Conditions
Overnight
40°F
Patchy Fog
Patchy fog. Mostly cloudy. Low around 40, with temperatures rising to around 42 overnight. East wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 40°F | Patchy Fog | 1 mph E | 0% |
| Wednesday | 55°F | Patchy Fog then Light Rain | 2 to 7 mph SE | 77% |
| Wednesday Night | 44°F | Light Rain | 7 to 12 mph S | 89% |
| Thursday | 56°F | Mostly Sunny | 10 mph S | 11% |
| Thursday Night | 44°F | Light Rain | 8 to 17 mph SE | 93% |
| Friday | 56°F | Light Rain | 12 to 24 mph SE | 93% |
| Friday Night | 44°F | Light Rain Likely | 2 to 12 mph ESE | 64% |
| Saturday | 62°F | Chance Light Rain | 3 to 16 mph ESE | 44% |
| Saturday Night | 46°F | Light Rain | 9 to 18 mph SSE | 84% |
| Sunday | 54°F | Chance Light Rain | 5 to 9 mph SSW | 51% |
| Sunday Night | 42°F | Slight Chance Light Rain | 5 mph SE | 15% |
| Monday | 53°F | Chance Light Rain | 2 to 8 mph E | 49% |
| Monday Night | 44°F | Light Rain Likely | 8 to 16 mph SE | 63% |
| Tuesday | 55°F | Light Rain Likely | 14 to 20 mph SE | 63% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Friday Harbor, WA
Last spring frost
Mar 26
First fall frost
Nov 10
Growing season
230 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, Friday Harbor Ap, Wa (4.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.