Marietta-Alderwood, WA Weather & Growing Conditions
This Afternoon
62°F
Sunny
Sunny, with a high near 62. South southwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 62°F | Sunny | 2 mph SSW | 0% |
| Tonight | 54°F | Partly Cloudy | 0 to 6 mph S | 1% |
| Saturday | 61°F | Partly Sunny | 1 to 7 mph S | 1% |
| Saturday Night | 53°F | Partly Cloudy | 2 mph SSE | 0% |
| Sunday | 61°F | Mostly Sunny | 3 mph SW | 0% |
| Sunday Night | 54°F | Partly Cloudy | 0 to 3 mph S | 0% |
| Monday | 62°F | Mostly Sunny | 2 to 6 mph S | 0% |
| Monday Night | 54°F | Partly Cloudy | 2 mph S | 0% |
| Tuesday | 61°F | Mostly Sunny | 3 mph S | 1% |
| Tuesday Night | 53°F | Partly Cloudy | 3 to 7 mph S | 6% |
| Wednesday | 61°F | Partly Sunny | 2 to 6 mph SSW | 6% |
| Wednesday Night | 53°F | Mostly Cloudy | 2 mph E | 12% |
| Thursday | 62°F | Partly Sunny then Slight Chance Light Rain | 5 mph ENE | 16% |
| Thursday Night | 54°F | Chance Light Rain | 5 mph SSW | 33% |
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 Sep 19, 2026.