Weather report 17 October 2026, 07:00

San Francisco starts clear and cool at around 13°C, then warms quickly to about 27°C early this afternoon. The wind turns west to south-west later in the afternoon, with gusts reaching 29 km/h, and temperatures fall back to around 18°C by 19:00. No rain is expected through midnight.

The night stays clear and cools to around 13°C, a marked change from the warm afternoon. The westerly wind eases before midnight.

Sunday starts clear and fresh but reaches only about 20°C. From late morning the westerly wind strengthens noticeably, with gusts of up to 42 km/h in the afternoon; no rain is expected.

Monday stays cool at around 17°C and continues gusty. On Tuesday temperatures rise to about 19°C and the chance of showers increases to 37%, though little or no rain is expected at first. By Wednesday around 2 mm of rain is possible, before it turns cooler again on Thursday.

The weather data review shows a clear warming from 23°C on Wednesday to 30°C yesterday. Today is forecast to reach 27°C, so the 30°C mark is no longer exceeded; this is not a heat spell. The strong westerly wind on Sunday and the cool, gusty Monday mark the shift to noticeably fresher days.

A light northerly wind this morning turns west to south-west late in the afternoon, with gusts of up to 29 km/h that will be noticeable on bridges and exposed roads. On Sunday the westerly wind strengthens markedly, with gusts of up to 42 km/h.