Friday Harbor, WA Weather & Growing Conditions
Today
56°F
Partly Sunny then Light Rain Likely
Rain likely after 4pm. Partly sunny. High near 56, with temperatures falling to around 53 in the afternoon. Southeast wind 6 to 9 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 56°F | Partly Sunny then Light Rain Likely | 6 to 9 mph SE | 72% |
| Tonight | 46°F | Light Rain | 9 to 14 mph S | 88% |
| Thursday | 56°F | Mostly Sunny | 12 mph SSE | 10% |
| Thursday Night | 47°F | Light Rain | 9 to 22 mph SE | 92% |
| Friday | 56°F | Light Rain | 13 to 28 mph SE | 92% |
| Friday Night | 46°F | Light Rain Likely | 3 to 13 mph SE | 65% |
| Saturday | 62°F | Chance Light Rain | 3 to 17 mph SE | 38% |
| Saturday Night | 47°F | Light Rain | 9 to 17 mph SSE | 83% |
| Sunday | 55°F | Chance Light Rain | 3 to 9 mph SSW | 50% |
| Sunday Night | 43°F | Slight Chance Light Rain | 3 mph SE | 15% |
| Monday | 54°F | Chance Light Rain | 2 to 6 mph E | 47% |
| Monday Night | 46°F | Light Rain Likely | 6 to 15 mph SE | 62% |
| Tuesday | 56°F | Light Rain Likely | 13 to 18 mph SE | 62% |
| Tuesday Night | 47°F | Light Rain Likely | 8 to 13 mph SE | 57% |
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 (6.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.