Washington · NWS SEW office

SeaTac, WA weather

It is 46°F and mostly cloudy at Seattle, Seattle-Tacoma International Airport as of Oct 28, 2:05 AM PDT. Overnight: Chance Light Rain, low near 44°F, 47% chance of precipitation. Forecast from the National Weather Service, issued Oct 27, 11:27 PM PDT.

Updated Oct 28, 2:24 AM PDT (snapshot)

Current conditions

Temperature

46°F

Mostly Cloudy

Wind

—

Humidity 93% · dew point 45°F

Pressure · visibility

29.85 inHg

Visibility 10 mi

Observed at Seattle, Seattle-Tacoma International Airport (KSEA), Oct 28, 2:05 AM PDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the SeaTac forecast zone right now.

Around the NWS SEW forecast area

No active alerts in zones served by the SEW office near SeaTac.

From the alert snapshot of Oct 28, 2026, 5:12 AM EDT. Washington has 5 active alerts: see them all.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for SeaTac (local time)
TimeTempForecastPrecip. chanceWind
Wed 4 AM47°FChance Light Rain25%SSW 13 mph
Wed 5 AM46°FChance Light Rain33%SSW 12 mph
Wed 6 AM46°FChance Light Rain28%SSW 10 mph
Wed 7 AM46°FChance Light Rain26%SSW 10 mph
Wed 8 AM45°FChance Light Rain30%SSW 10 mph
Wed 9 AM46°FSlight Chance Light Rain23%SSW 10 mph
Wed 10 AM47°FChance Light Rain26%SSW 13 mph
Wed 11 AM49°FChance Light Rain39%SW 13 mph
Wed 12 PM50°FChance Light Rain44%SSW 12 mph
Wed 1 PM51°FChance Light Rain44%SW 13 mph
Wed 2 PM51°FChance Light Rain50%SW 10 mph
Wed 3 PM53°FLight Rain Likely56%S 10 mph
Wed 4 PM52°FLight Rain Likely55%SW 13 mph
Wed 5 PM51°FChance Light Rain44%S 7 mph
Wed 6 PM50°FChance Light Rain37%S 7 mph
Wed 7 PM47°FChance Light Rain33%S 6 mph
Wed 8 PM47°FChance Light Rain34%S 6 mph
Wed 9 PM46°FSlight Chance Light Rain22%S 6 mph
Wed 10 PM46°FMostly Cloudy14%S 6 mph
Wed 11 PM46°FChance Light Rain28%SSE 5 mph
Thu 12 AM45°FChance Light Rain49%S 6 mph
Thu 1 AM44°FLight Rain Likely73%S 7 mph
Thu 2 AM44°FLight Rain Likely61%SSE 5 mph
Thu 3 AM43°FLight Rain Likely60%SE 5 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in SeaTac can differ.

7-day forecast

Overnight

Low 44°F

A chance of rain. Mostly cloudy. Low around 44, with temperatures rising to around 46 overnight. South southwest wind around 13 mph, with gusts as high as 22 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.

Wednesday

High 53°F·Low 39°F

Rain likely. Mostly cloudy. High near 53, with temperatures falling to around 51 in the afternoon. South southwest wind 7 to 13 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.

Wednesday Night: Rain likely. Mostly cloudy. Low around 39, with temperatures rising to around 42 overnight. South southeast wind around 7 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.

Thursday

High 54°F·Low 39°F

A chance of rain. Partly sunny, with a high near 54. Southwest wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.

Thursday Night: Rain likely. Mostly cloudy, with a low around 39. Northeast wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.

Friday

High 52°F·Low 37°F

Rain likely. Partly sunny, with a high near 52. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.

Friday Night: A chance of rain before 11pm. Mostly cloudy, with a low around 37.

Saturday

High 54°F·Low 39°F

A slight chance of rain after 5pm. Partly sunny, with a high near 54.

Saturday Night: A slight chance of rain before 11pm. Mostly cloudy, with a low around 39.

Sunday

High 54°F·Low 38°F

Partly sunny, with a high near 54.

Sunday Night: Mostly cloudy, with a low around 38.

Monday

High 56°F·Low 41°F

Partly sunny, with a high near 56.

Monday Night: Mostly cloudy, with a low around 41.

Tuesday

High 57°F

Partly sunny, with a high near 57.

Nearby cities

Larger cities in the area

Other cities in King County

See every city we cover in Washington, or check all active alerts.

About this forecast

Forecast office
SeaTac is served by the National Weather Service SEW forecast office, forecast zone WAZ316, county zone WAC033.
Location used
The Census Bureau's internal point for SeaTac (47.4434, -122.2983), in King County. Population: 34,024 (2024 estimate), number 37 of the 58 Washington cities on this site.
Radar
Nearest NWS radar: KATX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/47.4434,-122.2983 (forecast issued Oct 27, 11:27 PM PDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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