Coupeville, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Coupeville, a town in Island County, Washington.
This Afternoon
66°F
Partly Sunny
Partly sunny. High near 66, with temperatures falling to around 64 in the afternoon. West wind around 6 mph.
7-day forecast for Coupeville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Partly Sunny | 6 mph W | 0% |
| Tonight | 52°F | Partly Cloudy | 5 mph W | 0% |
| Sunday | 65°F | Mostly Sunny | 3 to 9 mph W | 0% |
| Sunday Night | 52°F | Mostly Cloudy | 8 mph W | 0% |
| Monday | 67°F | Partly Sunny | 5 to 8 mph WSW | 0% |
| Monday Night | 53°F | Partly Cloudy | 7 to 10 mph W | 1% |
| Tuesday | 65°F | Partly Sunny | 7 mph WSW | 1% |
| Tuesday Night | 52°F | Mostly Cloudy | 5 to 8 mph SW | 7% |
| Wednesday | 65°F | Partly Sunny | 7 mph SSW | 8% |
| Wednesday Night | 51°F | Mostly Cloudy | 8 mph W | 9% |
| Thursday | 63°F | Mostly Cloudy then Slight Chance Light Rain | 8 mph WNW | 15% |
| Thursday Night | 51°F | Chance Light Rain | 7 mph WNW | 25% |
| Friday | 63°F | Chance Light Rain | 5 to 9 mph WNW | 25% |
| Friday Night | 50°F | Slight Chance Light Rain | 3 to 8 mph WNW | 15% |
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 Sep 20, 2026.