FXUS66 KMTR 310039
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco CA
537 PM PDT Sun Aug 30 2026

...New AVIATION, MARINE...

.KEY MESSAGES...
Updated at 1232 PM PDT Sun Aug 30 2026

 - Slight chance for coastal drizzle during the night and morning
   hours through Tuesday morning

 - Cooling trend continues through at least midweek

&&

.SHORT TERM...
Issued at 1232 PM PDT Sun Aug 30 2026
(This evening through Monday night)

Stratus has retreated to the coast as of early afternoon with 
mostly sunny skies across the interior. Thus, temperatures inland 
temperatures will warm into the 70s to mid 80s and the lower 90s 
across the far interior. Meanwhile, persistent onshore flow and 
the marine layer will maintain cooler conditions near the coast, 
generally reaching into the 60s. 

The marine layer is likely to deepen overnight to around 2000 
feet and with an increased potential for coastal drizzle tonight 
and into midmorning on Monday. Expecting a slower clearing of 
stratus Monday morning as troughing off of the Pacific Northwest 
coast develops and deepens. As such, afternoon maximum 
temperatures will be 5 to 15 degrees below average. Heading into 
Monday night, another round of night/morning drizzle is expected 
along the coast and in the favored upslope regions. 

&&

.LONG TERM...
Issued at 1232 PM PDT Sun Aug 30 2026
(Tuesday through next Saturday)

Tuesday is now forecast to be the coolest day of the week with 
afternoon temperatures some 10 to 20 degrees below normal for this
time of year. Temperatures remain below seasonal averages 
throughout much of next week with the potential for rain 
particularly across the North Bay late week as a weak frontal 
boundary sags southward across the region. This is as a cut-off 
low develops off of the northern California coast Tuesday with 
troughing persisting through the remainder of the week and 
potentially into next weekend. Still keeping an eye on the 
tropical eastern Pacific as it remains fairly active for any 
moisture that may be brought northward into California. 

&&

.AVIATION...
(00Z TAFS)
Issued at 537 PM PDT Sun Aug 30 2026

VFR prevails except for areas of stratus and fog/mist /MVFR-IFR/ 
along the immediate coast south of Point Reyes. A steady erosion
of stratus on the northwestern edge continues to press southward
likely due to drawn down mixing of drier air aloft over the coastal
waters and land. At the same time a solid stratus intrusion is 
taking place over the Monterey Peninsula. This pattern will likely
continue to evolve as such through sunset at which time nocturnal 
radiative cooling will commence allowing additional coastal stratus,
fog/mist and drizzle to form including an inland intrusion tonight 
and Monday morning. Conditions improve to MVFR-VFR along the 
coastline Monday late morning and afternoon.

Vicinity of SFO...VFR except stratus /MVFR/ ceiling 10z-18z Monday
then a stratus ceiling redevelops 04z Monday evening. West wind 15
to 25 knots until mid to late this evening, wind otherwise westerly
8 to 15 knots.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...Stratus /MVFR-IFR/ developing through early
evening, tonight and Monday morning. Tempo light drizzle KMRY 10z-14z,
conditions improve to MVFR-VFR late Monday morning. West to northwest
winds 5 to 15 knots except evening gusts to 20 knots in the Salinas
Valley.

&&

.MARINE...
(Tonight through next Friday)
Issued at 437 PM PDT Sun Aug 30 2026

Fresh northwest winds diminish to a moderate breeze overnight,
allowing rough seas to subside to moderate by Monday morning. The
long period southerly swell continues to decrease tonight.
Northwest  to westerly winds remain gentle to moderate through the
remainder of  the work week as slight to moderate NW seas prevail.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...Small Craft Advisory until 3 AM PDT Monday for Pt Arena to Pt 
     Reyes 0-10 nm.

     Small Craft Advisory until 9 PM PDT this evening for Pigeon Pt 
     to Pt Pinos 10-60 NM-Pt Pinos to Pt Piedras Blancas 0-10 nm.

     Small Craft Advisory until 9 AM PDT Monday for Pt Arena to Pt 
     Reyes 10-60 NM.

&&

$$

SHORT TERM...RGass
LONG TERM....RGass
AVIATION...Canepa
MARINE...Navarrete

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Prepared by Boulder-Creek.com Weather at: Sun Aug 30 20:30:03 PDT 2026