FXUS66 KMTR 271115
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco CA
415 AM PDT Sat Jun 27 2026

...New AVIATION, MARINE...

.KEY MESSAGES...
Updated at 1225 AM PDT Sat Jun 27 2026

 - Gusty onshore winds today with east-west mountain passes as 
   high as 50+ mph. Winds increase for the waters this weekend, 
   with marine impacts through early next week 

 - An upper trough brings cooler temperatures, moisture, and a
   deeper marine layer with AM drizzle today

 - Beach hazards return this morning through Wednesday morning 
   for south and southwest facing beaches along the Pacific Coast

&&

.SHORT TERM...
Issued at 1225 AM PDT Sat Jun 27 2026
(Tonight through Sunday)

With troughing firmly in place, below normal temperatures are 
expected today with coastal drizzle and pockets of light rain 
through the morning. As the heights tighten with the southward push 
of the trough, winds will be elevated again today with gusts 50+ mph 
through west-east passes and mountain peaks, 20-40 mph wind gusts 
elsewhere. Winds will increase not only across inland areas, but 
also over the waters. Gusts up to 30-40 kt will be possible with 
seas of 8 to 10 ft. Marine hazards are currently in effect through 
Sunday morning, please see the marine discussion for further 
information.

Along the Pacific coastal beaches, there is a possibility for 
marginal coastal flooding. Due to the upcoming full moon (Monday), 
thermal expansion of Pacific waters, and southerly swells, 
coastal flooding for low lying beaches at predominantly south 
facing beaches is possible at high tides through Monday. An uptick
in long period southerly swell will result in a high risk of rip 
currents and sneaker waves. Never turn your back to the ocean! 
Beach hazards will be in effect this weekend and into much of next
week, see the beaches discussion for more information. 

&&

.LONG TERM...
Issued at 1225 AM PDT Sat Jun 27 2026
(Sunday night through next Friday)

The pattern begins to shift Sunday as the aforementioned low weakens 
and starts to move up into Idaho and Montana and heights slowly 
increase. With this, the marine layer will begin to compress a bit 
each day into early next week, and temperatures will slowly warm 
back towards normal. General troughing is expected to continue into 
next week with temperatures slowly warming into the middle of the 
week, but generally should remain at or below normal through the 
forecast period. Windy conditions will persists especially over the 
marine environment leading to a series of marine hazards, please see 
the marine discussion for further information.

The concern for hazardous beach conditions return for Pacific Coast 
beaches this weekend as long period southerly swells return. More 
information below in Beaches, but remember to never turn your back 
to the ocean!

&&

.AVIATION...
(12Z TAFS)
Issued at 414 AM PDT Sat Jun 27 2026

Widespread MVFR-IFR stratus south of the Golden Gate with coastal 
drizzle possible through the morning. Monitoring a boundary coming 
through the SF Bay Area for possible ceiling impacts to the major 
terminals. Expecting mainly VFR conditions to develop after sunrise 
and particularly towards the early afternoon hours. Strong westerly 
winds gusting 25 to 30 knots are expected to develop through the 
afternoon and evening. Moderate confidence in how long the winds 
persist into the late evening and overnight hours as high resolution 
models are showing a faster decrease than that currently reflected 
in the TAFs. With winds aloft remaining rather gusty, stratus 
coverage tonight through Sunday morning may be limited to the 
immediate coastal regions and the higher elevations of the Central 
Coast. In addition, marginal LLWS concerns may develop tonight in 
the interior terminals. 

Vicinity of SFO... MVFR stratus at present. Monitoring observations 
after the passing of a boundary for potential low-end VFR ceilings 
soon, otherwise gradual clearing takes place after sunrise. Strong 
westerly winds gusting to 35 knots are expected this afternoon and 
evening, then diminishing overnight with moderate confidence on how 
fast the wind speeds decrease, and that the terminal remains VFR 
overnight. 

SFO Bridge Approach... Similar to SFO.

Vicinity of OAK and SJC... MVFR stratus at present, monitoring 
observations for potential imminent improvement to low-end VFR as a 
boundary moves through the region, otherwise gradual clearing takes 
place after sunrise. Strong northwest winds with gusts 25 to 30 
knots will develop this afternoon and evening before diminishing 
into the overnight period. Moderate confidence that the terminals 
remain VFR overnight.

Monterey Bay Terminals... MVFR-IFR stratus continues through the 
morning hours. Strong west-northwest winds gusting to 25 knots 
develop in the afternoon and evening hours before gradually 
diminishing in the early overnight hours. Stratus will develop along 
the nearby ridgelines with low to moderate confidence that MVFR 
ceilings impact the terminals overnight. May need to monitor how the 
stratus develops this evening to get better insight.

&&

.MARINE...
(Today through Thursday)
Issued at 414 AM PDT Sat Jun 27 2026

Moderate to fresh northwest winds continue through the morning.
Stronger winds become more widespread across the entire region
this afternoon and through the night. These strong winds and
rough seas will result in hazardous conditions for small craft
across the waters at times well into the work week. Expect gale
force gusts to develop in the northern outer waters and along
coastal jet regions over the weekend as well. Long period
southwest swell will persist through the extended forecast.

&&

.BEACHES...
Issued at 1225 AM PDT Sat Jun 27 2026

A Beach Hazards Statement has been issued for the Pacific Coast 
Beaches from this morning through Wednesday morning as long 
period southerly swell returns to the coast, creating an increased
risk of sneaker waves and strong rip currents, especially for 
south and southwest facing beaches. Hazardous beach conditions are
advertised, specifically for moderate to steeply sloped beaches 
along the Pacific Coast of the North Bay, San Mateo, Santa Cruz 
counties. Sneaker waves will run up the beach much farther than 
other waves, potentially catching beachgoers by surprise and 
resulting in people being swept into the water. Rip currents are 
strong enough to pull the strongest swimmers away from shore. Swim
near a lifeguard if possible. Stay back from the beach, and away 
from jetties, piers, beachside rocks, and other infrastructure 
near the water. Never turn your back to the ocean! 

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement through late Tuesday night for CAZ006-
     505-509-529-530.

PZ...Small Craft Advisory until 3 AM PDT Sunday for SF Bay N of Bay 
     Bridge.

     Small Craft Advisory from 9 AM this morning to 3 AM PDT Sunday 
     for Mry Bay.

     Small Craft Advisory from 3 PM Sunday to 3 AM PDT Monday for Mry 
     Bay.

     Small Craft Advisory from 9 AM this morning to 3 PM PDT this 
     afternoon for Pt Arena to Pt Reyes 0-10 nm-Pt Arena to Pt 
     Reyes 10-60 NM-Pt Reyes to Pigeon Pt 0-10 nm.

     Gale Warning from 3 PM this afternoon to 3 AM PDT Sunday for Pt 
     Arena to Pt Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM-Pt 
     Pinos to Pt Piedras Blancas 0-10 nm-Pt Reyes to Pigeon Pt 0-
     10 nm.

     Small Craft Advisory from 9 AM this morning to 3 AM PDT Monday 
     for Pigeon Pt to Pt Pinos 0-10 nm.

     Small Craft Advisory until 3 PM PDT this afternoon for Pt Pinos 
     to Pt Piedras Blancas 0-10 nm.

     Small Craft Advisory from 3 PM this afternoon to 9 AM PDT Monday 
     for Pigeon Pt to Pt Pinos 10-60 NM.

&&

$$

SHORT TERM...Malarkey
LONG TERM....Malarkey
AVIATION...DialH
MARINE...DialH

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Prepared by Boulder-Creek.com Weather at: Sat Jun 27 06:30:02 PDT 2026