Coupeville, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Coupeville, a town in Island County, Washington.
Overnight
42°F
Mostly Cloudy
Mostly cloudy, with a low around 42. Southeast wind around 6 mph.
7-day forecast for Coupeville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 42°F | Mostly Cloudy | 6 mph SE | 0% |
| Wednesday | 58°F | Mostly Cloudy then Chance Light Rain | 7 to 20 mph SE | 51% |
| Wednesday Night | 46°F | Light Rain | 8 to 23 mph S | 81% |
| Thursday | 57°F | Mostly Sunny | 8 to 15 mph SSE | 9% |
| Thursday Night | 47°F | Light Rain | 15 to 26 mph SE | 85% |
| Friday | 56°F | Light Rain | 17 to 30 mph SE | 85% |
| Friday Night | 48°F | Light Rain Likely | 8 to 17 mph SE | 61% |
| Saturday | 63°F | Chance Light Rain | 9 to 21 mph SE | 33% |
| Saturday Night | 49°F | Light Rain | 18 to 22 mph SSE | 83% |
| Sunday | 56°F | Chance Light Rain | 2 to 18 mph SSE | 47% |
| Sunday Night | 44°F | Slight Chance Light Rain | 3 mph SE | 16% |
| Monday | 54°F | Chance Light Rain | 3 to 13 mph ESE | 44% |
| Monday Night | 47°F | Light Rain Likely | 13 to 23 mph SE | 59% |
| Tuesday | 57°F | Light Rain Likely | 20 to 25 mph SE | 59% |
Forecast source: National Weather Service (api.weather.gov) for Coupeville (48.219, -122.679). Updated through the day.
Growing snapshot for Coupeville
Last spring frost
Mar 17
First fall frost
Nov 11
Growing season
237 days
Hardiness zone
8b
More local growing data for Coupeville: nearby ZIP 98239 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Coupeville 1 S, Wa (1.8 mi from Coupeville). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.