Marietta-Alderwood, WA Weather & Growing Conditions
Today
69°F
Sunny
Sunny. High near 69, with temperatures falling to around 67 in the afternoon. Northwest wind 5 to 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 69°F | Sunny | 5 to 8 mph NW | 0% |
| Tonight | 58°F | Mostly Clear | 1 to 6 mph WNW | 0% |
| Wednesday | 70°F | Sunny | 2 to 6 mph NW | 0% |
| Wednesday Night | 58°F | Mostly Clear | 0 to 5 mph S | 0% |
| Thursday | 70°F | Sunny | 3 mph SW | 0% |
| Thursday Night | 59°F | Mostly Clear | 1 to 5 mph S | 0% |
| Friday | 69°F | Sunny | 6 mph S | 0% |
| Friday Night | 57°F | Mostly Clear | 5 mph S | 0% |
| Saturday | 69°F | Sunny | 2 to 6 mph S | 0% |
| Saturday Night | 56°F | Mostly Clear | 6 mph S | 0% |
| Sunday | 67°F | Mostly Sunny | 6 mph SSW | 0% |
| Sunday Night | 56°F | Mostly Clear | 5 mph S | 2% |
| Monday | 67°F | Mostly Sunny | 5 mph SW | 2% |
| Monday Night | 56°F | Partly Cloudy | 5 mph S | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Marietta-Alderwood, WA
Last spring frost
Apr 1
First fall frost
Nov 2
Growing season
216 days
Hardiness zone
8b
Explore more for Marietta-Alderwood, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Bellingham 3 Ssw, Wa (7.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.