SeaTac, WA Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for SeaTac, WA in one place.
Mostly sunny, with a high near 64.
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: Apr 19, 2026 7:05 PM PDT.
The active forecast window currently covers Apr 23 to Apr 25, 2026 for SeaTac, WA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 23 to Apr 25, 2026
- Latest sync
- Apr 19, 2026 7:05 PM PDT
- Forecast office
- SEW
- Source
- NOAA / NWS
Daily Outlook
This Week in SeaTac
Friday looks like the warmest upcoming period in SeaTac at 68 degrees F.
Thursday Night is the coolest period ahead with temperatures near 45 degrees F.
The strongest winds are forecast for Thursday at about 3 to 7 mph W.
The forecast from Apr 23 through Apr 25 stays mostly dry.
Forecast Details
- Last updated
- Apr 19, 2026 7:05 PM PDT
- Coverage
- 4 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 45.
Sunny, with a high near 68.
Mostly clear, with a low around 46.
Mostly sunny, with a high near 68.
Partly cloudy, with a low around 46.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Apr 23
|
Mostly Sunny
|
64°F |
3 to 7 mph
W
|
|
Thursday Night
Apr 23
|
Mostly Clear
|
45°F |
2 to 7 mph
NNE
|
|
Friday
Apr 24
|
Sunny
|
68°F |
2 to 7 mph
NNE
|
|
Friday Night
Apr 24
|
Mostly Clear
|
46°F |
2 to 7 mph
NE
|
|
Saturday
Apr 25
|
Mostly Sunny
|
68°F |
2 to 7 mph
NNE
|
|
Saturday Night
Apr 25
|
Partly Cloudy
|
46°F |
3 to 7 mph
NNE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around SeaTac.
