Ocosta, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ocosta, a community in Grays Harbor County, Washington.
Overnight
56°F
Mostly Clear
Mostly clear, with a low around 56. North northeast wind around 6 mph.
7-day forecast for Ocosta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Mostly Clear | 6 mph NNE | 0% |
| Tuesday | 74°F | Sunny | 6 to 12 mph N | 0% |
| Tuesday Night | 58°F | Mostly Clear | 5 to 12 mph NNW | 0% |
| Wednesday | 75°F | Patchy Smoke | 5 to 10 mph NW | 0% |
| Wednesday Night | 57°F | Partly Cloudy | 2 to 10 mph NW | 0% |
| Thursday | 70°F | Mostly Sunny | 2 to 9 mph WNW | 0% |
| Thursday Night | 57°F | Mostly Cloudy | 6 to 9 mph NW | 0% |
| Friday | 69°F | Mostly Sunny | 6 to 14 mph WNW | 0% |
| Friday Night | 57°F | Partly Cloudy | 14 mph NW | 0% |
| Saturday | 67°F | Mostly Sunny | 12 to 16 mph NW | 0% |
| Saturday Night | 57°F | Partly Cloudy | 12 to 17 mph NW | 0% |
| Sunday | 65°F | Partly Sunny | 10 to 14 mph NW | 0% |
| Sunday Night | 56°F | Mostly Cloudy | 9 to 15 mph NW | 0% |
| Monday | 65°F | Partly Sunny | 8 to 13 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Ocosta (46.886, -124.033). Updated through the day.
Growing snapshot for Ocosta
Last spring frost
Mar 29
First fall frost
Nov 7
Growing season
224 days
Hardiness zone
9a
More local growing data for Ocosta: nearby ZIP 98595 weather · frost dates · planting calendar · Washington frost dates
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Climate data from the nearest NOAA station, Grayland, Wa (6.7 mi from Ocosta). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.