Friday Harbor, WA Weather & Growing Conditions
Overnight
42°F
Patchy Fog
Patchy fog. Mostly cloudy, with a low around 42. East wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 42°F | Patchy Fog | 1 mph E | 0% |
| Wednesday | 55°F | Patchy Fog then Light Rain Likely | 2 to 7 mph SE | 74% |
| Wednesday Night | 46°F | Light Rain | 8 to 14 mph S | 91% |
| Thursday | 55°F | Mostly Sunny | 8 to 12 mph SSE | 12% |
| Thursday Night | 47°F | Light Rain | 9 to 18 mph SE | 93% |
| Friday | 55°F | Light Rain | 14 to 25 mph SE | 93% |
| Friday Night | 47°F | Light Rain Likely | 2 to 14 mph ESE | 66% |
| Saturday | 60°F | Chance Light Rain | 3 to 16 mph SE | 40% |
| Saturday Night | 48°F | Light Rain | 9 to 20 mph SSE | 84% |
| Sunday | 53°F | Chance Light Rain | 5 to 9 mph SSW | 53% |
| Sunday Night | 44°F | Slight Chance Light Rain | 5 mph SE | 15% |
| Monday | 52°F | Chance Light Rain | 2 to 8 mph E | 48% |
| Monday Night | 47°F | Light Rain Likely | 8 to 14 mph SE | 64% |
| Tuesday | 54°F | Light Rain Likely | 14 to 18 mph SE | 64% |
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 Nov 4, 2026.