Ocosta, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ocosta, a community in Grays Harbor County, Washington.
This Afternoon
58°F
Mostly Sunny
Mostly sunny. High near 58, with temperatures falling to around 54 in the afternoon. East southeast wind around 5 mph.
7-day forecast for Ocosta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 58°F | Mostly Sunny | 5 mph ESE | 3% |
| Tonight | 42°F | Partly Cloudy | 1 to 6 mph SE | 4% |
| Wednesday | 56°F | Mostly Cloudy then Light Rain | 6 to 13 mph SSE | 82% |
| Wednesday Night | 49°F | Light Rain then Mostly Cloudy | 5 to 13 mph SSW | 100% |
| Thursday | 56°F | Partly Sunny then Chance Light Rain | 5 to 10 mph SSW | 25% |
| Thursday Night | 50°F | Light Rain | 10 to 15 mph S | 91% |
| Friday | 57°F | Light Rain | 9 to 18 mph S | 91% |
| Friday Night | 50°F | Chance Light Rain | 9 mph SE | 48% |
| Saturday | 59°F | Light Rain Likely | 9 to 21 mph SSE | 67% |
| Saturday Night | 52°F | Showers And Thunderstorms | 17 to 24 mph SSW | 89% |
| Sunday | 57°F | Light Rain Likely | 6 to 17 mph SW | 61% |
| Sunday Night | 47°F | Chance Light Rain | 5 to 8 mph SE | 37% |
| Monday | 56°F | Light Rain Likely | 8 to 16 mph SE | 62% |
| Monday Night | 50°F | Light Rain | 16 to 22 mph SSE | 80% |
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 Nov 4, 2026.