Oak Harbor, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oak Harbor, a city in Island County, Washington.
Today
81°F
Sunny
Sunny, with a high near 81. Northwest wind 3 to 8 mph.
7-day forecast for Oak Harbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Sunny | 3 to 8 mph NW | 0% |
| Tonight | 56°F | Mostly Clear | 1 to 7 mph NW | 0% |
| Wednesday | 84°F | Sunny | 2 to 7 mph NW | 0% |
| Wednesday Night | 57°F | Mostly Clear | 1 to 6 mph W | 0% |
| Thursday | 83°F | Sunny | 1 to 6 mph W | 0% |
| Thursday Night | 58°F | Mostly Clear | 2 to 6 mph W | 0% |
| Friday | 81°F | Sunny | 3 to 7 mph SW | 0% |
| Friday Night | 57°F | Mostly Clear | 5 to 8 mph W | 0% |
| Saturday | 76°F | Sunny | 5 to 13 mph WSW | 0% |
| Saturday Night | 55°F | Mostly Clear | 3 to 13 mph W | 0% |
| Sunday | 75°F | Mostly Sunny | 6 mph WSW | 0% |
| Sunday Night | 55°F | Mostly Clear | 3 to 7 mph W | 1% |
| Monday | 75°F | Mostly Sunny | 6 mph W | 1% |
| Monday Night | 55°F | Partly Cloudy | 6 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Oak Harbor (48.294, -122.628). Updated through the day.
Growing snapshot for Oak Harbor
Last spring frost
Mar 13
First fall frost
Nov 14
Growing season
244 days
Hardiness zone
8b
More local growing data for Oak Harbor: nearby ZIP 98277 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Whidbey Island Nas, Wa (2.7 mi from Oak Harbor). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.