Coupeville, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Coupeville, a town in Island County, Washington.
Today
78°F
Sunny
Sunny, with a high near 78. Northwest wind around 9 mph.
7-day forecast for Coupeville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Sunny | 9 mph NW | 0% |
| Tonight | 58°F | Mostly Clear | 2 to 8 mph NW | 0% |
| Wednesday | 80°F | Sunny | 3 to 8 mph NW | 0% |
| Wednesday Night | 58°F | Mostly Clear | 2 to 8 mph W | 0% |
| Thursday | 79°F | Sunny | 2 to 7 mph W | 0% |
| Thursday Night | 59°F | Mostly Clear | 7 mph W | 0% |
| Friday | 77°F | Sunny | 5 to 8 mph SW | 0% |
| Friday Night | 57°F | Mostly Clear | 10 mph W | 0% |
| Saturday | 73°F | Sunny | 6 to 14 mph W | 0% |
| Saturday Night | 57°F | Mostly Clear | 6 to 14 mph W | 0% |
| Sunday | 73°F | Mostly Sunny | 3 to 7 mph WSW | 0% |
| Sunday Night | 56°F | Mostly Clear | 6 to 9 mph W | 1% |
| Monday | 73°F | Mostly Sunny | 7 mph W | 1% |
| Monday Night | 56°F | Partly Cloudy | 5 to 8 mph W | 1% |
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 Aug 4, 2026.