Swell Matrix

Area Forecast Discussion

National Weather Service San Francisco CA

456 am PDT Sat Jun 10 2023


Issued at 317 AM PDT Sat Jun 10 2023

Near to below normal temperatures will prevail this weekend and into at least the middle of the upcoming week. Isolated showers and thunderstorms are also expected, mainly over the Central Coast and the North Bay this weekend and into early next week. Otherwise and elsewhere, widespread measurable precipitation is not anticipated.


(12z TAFS) Issued at 455 AM PDT Sat Jun 10 2023

Extensive midlevel cloudiness continuing to stream through from the south significantly interferes with ability to see extent of low cloudiness in IR fog product satellite imagery. That said, combination of surface observations and the few areas that can still be discerned from above indicates stratus coverage is now widespread around the bays and well into the coastal valleys. All terminals are presently reporting MVFR to IFR ceilings. Latest model output and statistical guidance indicates clearing on Saturday will be on the late side, as an upper level acts to deepen the marine layer and circulate in additional moisture.

Vicinity of SFO, MVFR CIGs now well-established, and expect will persist through Saturday morning. Clearing looks to be delayed until at least around midday and potentially even a bit later. Seasonally typically breezy west winds will develop during the afternoon.

SFO Bridge Approach, Similar to SFO.

Monterey Bay Terminals, MVFR CIGs prevail at both KMRY and KSNS, and expect will persist through Saturday morning, possibly lowering to IFR at KMRY around sunrise. Clearing looks to be delayed until midday to early afternoon. Seasonally typical moderate onshore winds are expected to develop during the afternoon.


Issued at 234 AM PDT Sat Jun 10 2023

Mixed swells continue with increasing northwest winds. Moderately strong and gusty winds will then persist through Sunday primarily over the northern outer waters. Winds diminish and turn southwesterly early next week as a weak low pressure center develops offshore.

Watches, Warnings, Advisories

Ca, none. Pz, small craft advisory from 3 pm this afternoon to 9 pm PDT this evening for pzz530.

small craft advisory from 1 pm this afternoon to 9 pm PDT this evening for pzz540.

small craft advisory until 3 am PDT Monday for pzz570.

Visit this site often? Consider supporting us with a $10 contribution.
Learn more