FXUS66 KMTR 222326
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco CA
426 PM PDT Sat Aug 22 2026

...New AVIATION, MARINE...

.KEY MESSAGES...
Updated at 103 PM PDT Sat Aug 22 2026

 - Near to slightly below normal temperatures within the marine
   layer through the extended forecast

 - Warm and dry conditions persist above 1000 feet

&&

.SHORT TERM...
Issued at 103 PM PDT Sat Aug 22 2026
(This evening through Sunday night)

The Bay Area and Central Coast continue to be on the border of upper 
level troughing across Northern California/the Pacific Northwest. 
Practically, no major changes to the overall forecast. Ridging 
influence is more pronounced today with the marine layer compressed 
to around 1000 feet and less extensive morning stratus coverage. 
Stratus cover has dissipated everywhere except the San Francisco/San 
Mateo coastline with clear skies across the rest of the region. This 
will help temperatures to warm slightly compared to yesterday with 
interior highs in the upper 70s to 80s. Conditions will be warm 
above the marine layer/in the higher terrain where highs will peak 
in the upper 80s to low 90s. Cooler conditions prevail along the 
coast and SF Bay shoreline with highs in the 60s to low 70s. The 
Interior Central Coast remains toasty with highs in the upper 90s to 
low 100s expected across far interior Monterey County.

Ridging effects remain pronounced heading into Sunday with the 
marine layer remaining compressed to around 1000 feet. This will 
bring a return of patchy stratus along the coast and SF Bay 
shoreline. Given the compressed nature of the marine layer, stratus 
should scatter out early again, likely by 10/11AM. Sunday's high 
temperatures will be comparable to Saturday's with highs in the 80s 
to low 90s across the interior, 60s to 70s along the coast and SF 
Bay shoreline, and in the 90s to low 100s across the interior 
Central Coast. Breezy conditions expected Saturday and Sunday over 
the marine environment, along the coast, and across favored mountain 
gaps/passes. 

&&

.LONG TERM...
Issued at 103 PM PDT Sat Aug 22 2026
(Monday through next Friday)

The long term forecast is a rinse and repeat of the short term with 
upper level ridging and troughing fighting over our area. Troughing 
becomes more influential Monday and Tuesday with the marine layer 
deepening to around 1000-1500 ft. This should bring more substantial 
early morning stratus to the region and will see temperatures cool 
by about 5-6 degrees (low 80s to low 90s across the interior) while 
coastal temperatures stay relatively stable. Mid to late week, 
ridging again becomes more dominant with temperatures warming 
slightly and the marine layer/stratus coverage compressing. This 
will keep temperatures near to slightly above normal above the 
marine layer and near to slightly below normal within it through the 
extended forecast. Diurnally breezy winds continue each 
afternoon/evening along the coast, higher elevations, and across 
mountain gaps/passes. Looking farther out, the GFS and ECMWF 
continue to show a number of tropical systems developing across the 
Eastern Pacific. We will be keeping an eye on these systems as they 
develop to see how they interact with the upper level ridge and if 
any tropical moisture will extend towards the West Coast.

&&

.AVIATION...
(00Z TAFS)
Issued at 426 PM PDT Sat Aug 22 2026

It's VFR except for patches of coastal stratus and fog /IFR/ along
San Mateo County and Monterey County. Mid and high clouds, including
wildfire smoke over the north Central Coast, are moving northeastward
over the forecast area. Northerly to northeasterly winds develop over
the North Bay tonight and Sunday morning. Coastal stratus and fog
/IFR-LIFR/ redevelop tonight and Sunday morning. 

Vicinity of SFO...VFR prevails until stratus /IFR/ develops 12z 
Sunday. VFR returns 18z Sunday. West wind 20 to 30 knots until mid
evening then decreasing to 8 to 15 knots tonight and Sunday morning.
West wind increasing to 15 to 20 knots Sunday afternoon to mid 
Sunday evening.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR until stratus /IFR-LIFR/ redevelops 
late tonight and Sunday morning. Conditions improve to MVFR-VFR 
late Sunday morning and afternoon. West to northwest winds 5 to 
15 knots.

&&

.MARINE...
(Tonight through next Thursday)
Issued at 401 PM PDT Sat Aug 22 2026

Fresh to strong northwesterlies persist into Sunday morning as
moderate seas prevail through the weekend. Marine conditions
remain  hazardous for small craft until Sunday night. Northern
outer waters  maintain elevated winds into Monday. Expect minor
impacts to  visibility along the Big Sur coastline due to smoke
from the  Timber Fire getting trapped south of Point Sur.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...Small Craft Advisory until 9 PM PDT this evening for Mry Bay-SF 
     Bay N of Bay Bridge.

     Small Craft Advisory until 3 AM PDT Sunday for Pigeon Pt to Pt 
     Pinos 0-10 nm-Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt 
     Reyes 0-10 nm-Pt Pinos to Pt Piedras Blancas 0-10 nm-Pt 
     Reyes to Pigeon Pt 0-10 nm.

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

&&

$$

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

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Prepared by Boulder-Creek.com Weather at: Sat Aug 22 16:30:03 PDT 2026