Oak Harbor, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oak Harbor, a city in Island County, Washington.
Tonight
41°F
Partly Cloudy then Patchy Fog
Patchy fog between 3am and 4am. Partly cloudy, with a low around 41. East wind 0 to 3 mph.
7-day forecast for Oak Harbor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 41°F | Partly Cloudy then Patchy Fog | 0 to 3 mph E | 1% |
| Wednesday | 58°F | Partly Sunny then Chance Light Rain | 5 to 17 mph SE | 50% |
| Wednesday Night | 46°F | Light Rain | 7 to 18 mph S | 87% |
| Thursday | 57°F | Mostly Sunny | 7 to 14 mph S | 8% |
| Thursday Night | 47°F | Light Rain | 14 to 22 mph SE | 87% |
| Friday | 57°F | Light Rain | 17 to 26 mph SE | 87% |
| Friday Night | 47°F | Light Rain Likely | 6 to 17 mph SE | 62% |
| Saturday | 63°F | Chance Light Rain | 6 to 20 mph SE | 32% |
| Saturday Night | 49°F | Light Rain | 15 to 20 mph SSE | 83% |
| Sunday | 57°F | Chance Light Rain | 2 to 15 mph S | 47% |
| Sunday Night | 43°F | Slight Chance Light Rain | 3 mph SE | 17% |
| Monday | 56°F | Chance Light Rain | 2 to 12 mph ESE | 45% |
| Monday Night | 46°F | Light Rain Likely | 12 to 20 mph SE | 60% |
| Tuesday | 59°F | Light Rain Likely | 18 to 23 mph SE | 60% |
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 Nov 4, 2026.