SeaTac, WA Weather Forecast
Local 7-day forecast
Partly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for SeaTac, WA in one place.
Partly sunny, with a high near 72. West wind around 3 mph.
Local Weather Overview
This forecast page for SeaTac, WA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Sep 18, 2026 11:15 AM PDT.
The active forecast window currently covers Sep 19 to Sep 24, 2026 for SeaTac, WA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 19 to Sep 24, 2026
- Latest sync
- Sep 18, 2026 11:15 AM PDT
- Forecast office
- SEW
- Source
- NOAA / NWS
Daily Outlook
This Week in SeaTac
Saturday looks like the warmest upcoming period in SeaTac at 72 degrees F.
Sunday Night is the coolest period ahead with temperatures near 52 degrees F.
The strongest winds are forecast for Sunday at about 2 to 6 mph N.
Precipitation is mentioned in 1 upcoming forecast period.
Forecast Details
- Last updated
- Sep 18, 2026 11:15 AM PDT
- Coverage
- 7 days
- Time zone
- America/Los_Angeles
- Forecast office
- SEW
- Radar station
- KATX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 53. North wind around 5 mph.
Sunny, with a high near 72. North wind 2 to 6 mph.
Mostly clear, with a low around 52.
Mostly sunny, with a high near 71.
Mostly cloudy, with a low around 54.
Partly sunny, with a high near 69.
Mostly cloudy, with a low around 52.
Partly sunny, with a high near 68.
Mostly cloudy, with a low around 52.
Partly sunny, with a high near 70.
A chance of rain after 11pm. Mostly cloudy, with a low around 52.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Sep 19
|
Partly Sunny
|
72°F |
3 mph
W
|
|
Saturday Night
Sep 19
|
Mostly Clear
|
53°F |
5 mph
N
|
|
Sunday
Sep 20
|
Sunny
|
72°F |
2 to 6 mph
N
|
|
Sunday Night
Sep 20
|
Mostly Clear
|
52°F |
2 to 6 mph
N
|
|
Monday
Sep 21
|
Mostly Sunny
|
71°F |
3 mph
W
|
|
Monday Night
Sep 21
|
Mostly Cloudy
|
54°F |
3 mph
NNE
|
|
Tuesday
Sep 22
|
Partly Sunny
|
69°F |
3 mph
NW
|
|
Tuesday Night
Sep 22
|
Mostly Cloudy
|
52°F |
3 mph
WSW
|
|
Wednesday
Sep 23
|
Partly Sunny
|
68°F |
2 to 6 mph
NW
|
|
Wednesday Night
Sep 23
|
Mostly Cloudy
|
52°F |
5 mph
NNE
|
|
Thursday
Sep 24
|
Partly Sunny
|
70°F |
2 to 6 mph
NW
|
|
Thursday Night
Sep 24
|
Chance Light Rain
|
52°F |
5 mph
WSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around SeaTac.
