National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Hazardous Weather Conditions

39NM NW San Francisco CA

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:Variable winds 5 kt or less. Patchy dense fog. Mixed swell...WNW 4 ft at 7 seconds and SSW 1 ft at 13 seconds. Wind waves 1 ft or less.

      Light Wind
      3ft

    • Monday

      Monday:Variable winds less than 5 kt becoming WNW 5 to 7 kt in the afternoon. Widespread fog, mainly between 8am and 9am. Mixed swell...WNW 3 ft at 6 seconds and SSW 1 ft at 13 seconds. Wind waves 1 ft or less.

      ⇑WNW 7kt
      2ft

      Small Craft Advisory
      Small Craft Advisory

    • Monday Night

      Monday Night:N wind around 6 kt. Patchy fog. Mixed swell...WNW 4 ft at 7 seconds and SSW 1 ft at 12 seconds. Wind waves 1 ft or less.

      N 6kt
      3ft

      Small Craft Advisory
      Small Craft Advisory

    • Tuesday

      Tuesday:Variable winds less than 5 kt becoming NW 5 to 8 kt in the morning. Areas of fog before 1pm. Mixed swell...WNW 5 ft and S 1 ft. Wind waves 1 ft or less.

      ⇑NW 8kt
      3ft

    • Tuesday Night

      Tuesday Night:N wind around 6 kt. Patchy fog after 7pm. Mixed swell...WNW 5 ft and S 2 ft becoming SW. Wind waves 1 ft or less.

      N 6kt
      4ft

    • Wednesday

      Wednesday:N wind 5 to 8 kt becoming NW in the afternoon. Areas of fog before 1pm. Mixed swell...WNW 4 ft and SW 3 ft becoming SSW. Wind waves 1 ft or less.

      NW 8kt
      4ft

    • Wednesday Night

      Wednesday Night:N wind 5 to 7 kt. Patchy fog after 10pm. Mixed swell...W 5 ft and SW 4 ft becoming SSW 1 ft. Wind waves around 1 ft.

      N 7kt
      4ft

    • Thursday

      Thursday:Variable winds 5 kt or less. Areas of fog. Mixed swell...W 6 ft and S 1 ft. Wind waves 1 ft or less.

      Light Wind
      4ft

    • Thursday Night

      Thursday Night:Variable winds 5 kt or less. Widespread fog, mainly between 7pm and 3am. Mixed swell...WNW 6 ft and S 1 ft. Wind waves 1 ft or less.

      Light Wind
      4ft


Associated Zone Forecast which includes this point

Last Update: 6:20 pm PST Dec 7, 2025
Forecast Valid: 8pm PST Dec 7, 2025-6pm PST Dec 14, 2025

View Nearby Observations

Detailed Forecast


Tonight
Variable winds 5 kt or less. Patchy dense fog. Mixed swell...WNW 4 ft at 7 seconds and SSW 1 ft at 13 seconds. Wind waves 1 ft or less.
Monday
Variable winds less than 5 kt becoming WNW 5 to 7 kt in the afternoon. Widespread fog, mainly between 8am and 9am. Mixed swell...WNW 3 ft at 6 seconds and SSW 1 ft at 13 seconds. Wind waves 1 ft or less.
Monday Night
N wind around 6 kt. Patchy fog. Mixed swell...WNW 4 ft at 7 seconds and SSW 1 ft at 12 seconds. Wind waves 1 ft or less.
Tuesday
Variable winds less than 5 kt becoming NW 5 to 8 kt in the morning. Areas of fog before 1pm. Mixed swell...WNW 5 ft and S 1 ft. Wind waves 1 ft or less.
Tuesday Night
N wind around 6 kt. Patchy fog after 7pm. Mixed swell...WNW 5 ft and S 2 ft becoming SW. Wind waves 1 ft or less.
Wednesday
N wind 5 to 8 kt becoming NW in the afternoon. Areas of fog before 1pm. Mixed swell...WNW 4 ft and SW 3 ft becoming SSW. Wind waves 1 ft or less.
Wednesday Night
N wind 5 to 7 kt. Patchy fog after 10pm. Mixed swell...W 5 ft and SW 4 ft becoming SSW 1 ft. Wind waves around 1 ft.
Thursday
Variable winds 5 kt or less. Areas of fog. Mixed swell...W 6 ft and S 1 ft. Wind waves 1 ft or less.
Thursday Night
Variable winds 5 kt or less. Widespread fog, mainly between 7pm and 3am. Mixed swell...WNW 6 ft and S 1 ft. Wind waves 1 ft or less.

*Notices:

  1. This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
  2. The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.
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ABOUT THIS FORECAST

Point Forecast: 38.25°N 122.97°W
Last Update: 6:20 pm PST Dec 7, 2025
Forecast Valid: 8pm PST Dec 7, 2025-6pm PST Dec 14, 2025
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