Forecast Details for San Francisco, CA

Recent Locations: San Francisco, CA

Current Alerts for San Francisco, CA: Coastal Flood Advisory

Today: Sunny, with a high near 69. West southwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 24 mph.

Tonight: Mostly clear, with a low around 53. West wind 13 to 18 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 23 mph.

Friday: Sunny, with a high near 72. Light south wind becoming west 12 to 17 mph in the morning. Winds could gust as high as 22 mph.

Friday Night: Mostly clear, with a low around 55. Southwest wind 13 to 18 mph decreasing to 7 to 12 mph in the evening. Winds could gust as high as 23 mph.

Saturday: Sunny, with a high near 71. West southwest wind 6 to 11 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 25 mph.

Saturday Night: Mostly clear, with a low around 54.

Sunday: Mostly sunny, with a high near 68.

Sunday Night: Mostly cloudy, with a low around 54.

Monday: Partly sunny, with a high near 66.

Monday Night: Mostly cloudy, with a low around 54.

Tuesday: Mostly sunny, with a high near 68.

Tuesday Night: Partly cloudy, with a low around 55.

Wednesday: Mostly sunny, with a high near 70.

Want more detail? Get the Complete 7 Day and Night Detailed Forecast!

Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

National Weather Forecast--Current

The Current National Weather Forecast and National Weather Map are shown below.

National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

Weather Topic: What is Precipitation?

Home - Education - Precipitation - Precipitation

Next Topic: Rain

Precipitation can refer to many different forms of water that may fall from clouds. Precipitation occurs after a cloud has become saturated to the point where its water particles are more dense than the air below the cloud.

In most cases, precipitation will reach the ground, but it is not uncommon for precipitation to evaporate before it reaches the earth's surface. When precipitation evaporates before it contacts the ground it is called Virga. Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog and mist are not considered precipitation because the water vapor which constitutes them isn't dense enough to fall to the ground.

Next Topic: Rain

Weather Topic: What are Shelf Clouds?

Home - Education - Cloud Types - Shelf Clouds

Shelf Clouds Next Topic: Sleet

A shelf cloud is similar to a wall cloud, but forms at the front of a storm cloud, instead of at the rear, where wall clouds form.

A shelf cloud is caused by a series of events set into motion by the advancing storm; first, cool air settles along the ground where precipitation has just fallen. As the cool air is brought in, the warmer air is displaced, and rises above it, because it is less dense. When the warmer air reaches the bottom of the storm cloud, it begins to cool again, and the resulting condensation is a visible shelf cloud.

Next Topic: Sleet