According to the National Weather Service, San Francisco will have some patchy fog before noon (and I can hear those foghorns as I type this). Otherwise, they predict that it will be partly sunny today, with a high near 66.
They’re predicting rain late this evening, with the accompanying clouds and a low of around 52. Winds tonight could get a little rowdy, with gusts as high as 21 MPH. Hold on to your hat!