FXUS66 KMTR 011113
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco CA
413 AM PDT Mon Jun 1 2026

...New AVIATION, MARINE...

.KEY MESSAGES...
Updated at 1144 PM PDT Sun May 31 2026

 - Long period southwest swell will result in an increased risk of
   sneaker waves and rip currents through Tuesday morning

 - Today will be the warmest day of the week for most locations

 - Slightly cooler temperatures by the end of the week into the weekend

&&

.SHORT TERM...
Issued at 1144 PM PDT Sun May 31 2026
(Today and tonight)

Today will be the warmest day of the week with temperatures 5-10 
degrees above normal with slight H50 height increase though little 
change in thickness values. The marine layer remains primarily 
compressed to coastal areas with stratus lifting by late morning. 
Expect mostly sunny skies by the afternoon with breezy diurnal 
onshore flow at times, especially in the East Bay Hills and Salinas 
Valley. A strengthening marine layer tonight into Tuesday morning 
will make farther progress inland with overnight lows in the 50s 
area wide.

&&

.LONG TERM...
Issued at 1144 PM PDT Sun May 31 2026
(Tuesday through Sunday)

The upper level ridging begins to shift east and flatten on Tuesday 
with split flow aloft across our region through the end of the work 
week, which will keep temperatures at or slightly above normal 
through the remainder of the work week. There's also a chance of 
coastal drizzle with the expanding marine layer through the middle 
of the week. There is still some uncertainty with the exact position 
and timing of a developing trough moving into the Pacific Northwest 
by the end of the week into the weekend, but confidence is high that 
we'll see a slight cool down for next weekend with otherwise no 
impactful or hazardous weather concerns through the extended 
forecast.

&&

.AVIATION...
(12Z TAFS)
Issued at 413 AM PDT Mon Jun 1 2026

Generally clear conditions prevail with the exception of IFR-LIFR 
stratus around the southern end of Monterey Bay and parts of the Big 
Sur Coast, expected to persist and perhaps make its way up the 
Salinas Valley through sunrise. Confidence in stratus development at 
HAF has diminished, and have converted the prevailing stratus line 
to a TEMPO. Stratus should dissipate through the post-sunrise hours 
with breezy onshore winds developing in the afternoon and evening. 
An expanding marine layer tonight into Tuesday morning should allow 
stratus development to make it farther inland than the last couple 
of nights. 

Vicinity of SFO... VFR conditions through the day with breezy 
northwest winds developing in the afternoon and evening hours. As 
winds diminish overnight, strong indications that stratus will flow 
through the Golden Gate, but high resolution models are placing the 
stratus deck just to the north of the terminal, making the presence 
and timing of stratus impacts uncertain. Higher confidence for 
stratus impacts at OAK. 

SFO Bridge Approach... Similar to SFO.

Monterey Bay Terminals... LIFR stratus and fog through the morning, 
with breezy northwest winds developing in the afternoon and evening. 
Overnight stratus is likely with some MVFR-IFR ceilings possible as 
the marine layer expands.

&&

.MARINE...
(Today through Saturday)
Issued at 413 AM PDT Mon Jun 1 2026

Fresh to strong northerly winds gradually decrease through the
morning with moderate to fresh winds expected by Monday
afternoon. Seas subside below 10 feet as winds decrease by Monday
afternoon. Moderate to fresh northerly winds continue through
Tuesday before building seas, strong northerly winds, and gale
force gusts return starting mid week.

&&

.BEACHES...
Issued at 1229 AM PDT Mon Jun 1 2026

A Beach Hazards Statement remains in effect today through 5 AM
Tuesday morning due to an increased risk for sneaker waves and
strong rip currents caused by a long period southwest swell. On
the buoys, this swell is being masked by stronger northwest swell
waves, but careful analysis of the wave spectrum at the Point
Reyes and Point Sur buoys reveals a southwest swell around 1 to 2
feet high with a period of 20 seconds. These long period swells 
result in increased risk of sneaker waves, potentially deadly 
waves which surge much further up the beach than expected and 
sweep unaware beachgoers into the ocean, and strong rip currents 
that can sweep the strongest swimmers away from shore. Never turn 
your back to the ocean! Inexperienced swimmers should stay away  
from the water. Observe the waves for 20 minutes before moving 
closer. Swim near a lifeguard if possible, and if caught in a rip 
current, swim parallel to the coast away from the current, and 
then at an angle to shore.

&&

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

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

     Small Craft Advisory from 3 PM Tuesday to 9 AM PDT Wednesday for 
     Pt Arena to Pt Reyes 10-60 NM.

&&

$$

SHORT TERM...JM
LONG TERM....JM
AVIATION...DialH
MARINE...DialH

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Prepared by Boulder-Creek.com Weather at: Mon Jun 1 10:30:03 PDT 2026