4070 Weather

Seattle-Tacoma Airport (SEA) fog forecast

Washington · bay or sound · updated Thu, Oct 8, 7:25 PM PDT

The chance of fog at Seattle-Tacoma Airport (SEA) is 0% tonight, 12% tomorrow and 7% on Saturday. Fog is unlikely there over the next 3 days.

Chance of fog, next 3 days

  1. Tonight

    Thursday, October 8, rest of the day

    0%

    Fog unlikely

  2. Tomorrow

    Friday, October 9

    12%

    Fog unlikely

  3. Sat 10

    Saturday, October 10

    7%

    Fog unlikely

Each number is the chance that fog (visibility of a mile or less) happens at some point that day in Seattle-Tacoma Airport (SEA) local time. The first day counts only the hours still to come. Under 20% is unlikely, 20 to 39% possible, 40 to 69% likely and 70% or more very likely.

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Where fog is most likely today

The highest chance of fog today, out of 292 places:

  1. 1Morro Bay, CA95%
  2. 2Santa Maria, CA95%
  3. 3Lompoc, CA94%
  4. 4Quillayute, WA93%
  5. 5Arcata / Eureka, CA92%

In 4070: every place on a map for any day this week, with dense fog flagged.

The full Seattle-Tacoma Airport (SEA) forecast

  • Hour-by-hour fog chances at Seattle-Tacoma Airport (SEA), and when fog is forecast to form and clear
  • Days 4 through 7
  • A chart of how deep the marine layer is at Seattle-Tacoma Airport (SEA), hour by hour
  • Dense fog flagged when visibility could drop under a quarter mile
  • The fog and low clouds radar layer, now and forecast
  • A map of all 292 places, for any day this week

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  • Fog and low clouds on radar

    A radar layer for fog and low clouds, with the latest model view of fog right now and forecast frames for the hours ahead.

  • Marine layer

    For coastal West Coast places, a chart of how deep the marine layer is hour by hour, and in the San Francisco Bay Area a 3D view of the fog deck over the terrain.

  • Meteograms

    Hourly temperature, dewpoint, precipitation and wind at a point. When the temperature and dewpoint meet, fog is possible.

  • Soundings

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  • Radar

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  • Your forecast and alerts

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  • Model Explorer

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About fog at Seattle-Tacoma Airport (SEA)

Seattle-Tacoma Airport (SEA) is on a bay, sound or harbor. Moist air over cool water can form low cloud and fog that spreads over the shoreline and nearby airports, often overnight and into the morning, and can linger when there is little wind to move it.

In the last two years of airport weather reports here, fog (visibility of a mile or less) was reported in about 2.5% of hours. It showed up most often in January and December, and most often between 6 and 9 AM local time.

Seattle-Tacoma Airport (SEA) fog forecast questions

Will it be foggy tomorrow in Seattle-Tacoma Airport (SEA)?

Tomorrow the chance of fog at Seattle-Tacoma Airport (SEA) is 12%: fog unlikely. That is the chance that visibility drops to a mile or less at some point that day. It is a chance, not a promise, and it can change as new forecasts arrive (this one was updated Thu, Oct 8, 7:25 PM PDT).

How likely is fog in Seattle-Tacoma Airport (SEA) today?

Tonight the chance of fog at Seattle-Tacoma Airport (SEA) is 0% (fog unlikely). That covers the rest of the day in local time, from now until midnight.

What time does fog usually clear in Seattle-Tacoma Airport (SEA)?

Fog near the water often thins in the late morning or around midday once the sun warms the air, but marine layer can stay through the afternoon on cloudy, calm days. Airport reports show fog most often between 6 and 9 AM local time. Exact fog start and clearing times, hour by hour, are part of the full forecast in 4070 Pro.

Why does Seattle-Tacoma Airport (SEA) get fog?

Seattle-Tacoma Airport (SEA) is on a bay, sound or harbor. Moist air over cool water can form low cloud and fog that spreads over the shoreline and nearby airports, often overnight and into the morning, and can linger when there is little wind to move it. In the last two years of airport weather reports here, fog (visibility of a mile or less) was reported in about 2.5% of hours. It showed up most often in January and December, and most often between 6 and 9 AM local time.

How far ahead can I trust a fog forecast for Seattle-Tacoma Airport (SEA)?

Fog is hard to forecast. The first several hours are the most reliable. Further out the forecast leans on how often fog happens at Seattle-Tacoma Airport (SEA) at that time of year, so read the second and third day as a chance, not a prediction. The chance combines several weather models with the place's own fog history and is updated every hour.

Fog forecasts nearby

All 292 places, by state

Seattle-Tacoma Airport (SEA) Fog Forecast | Next 3 Days | 4070