059
FXUS66 KMTR 312159
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco CA
259 PM PDT Sun May 31 2026

...New MARINE...

.KEY MESSAGES...
Updated at 125 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

 - Continued warming for today and Monday

 - Slightly cooler temperatures for the second half of the
   forecast

&&

.SHORT TERM...
Issued at 125 PM PDT Sun May 31 2026
(This evening through Monday)

A compressed marine layer allowed for a quick erosion of coastal
stratus in the mid to late morning. Now we`re seeing clear skies
into the afternoon with light to moderate winds and temperatures
already warming into the 70s in the interior.

Highs looks to stay around 60 along the immediate coast with 70s
for the more inland areas, 80s for the interior, and a few 90s in
the far interior. This is as a ridge pattern takes a better hold
onto the region, calling for continued compression of the marine
layer, weakening winds, and building temperatures.

The compressed marine layer (around 500 ft) will still have good
moisture content overnight, leading to very low coastal clouds and
pockets of fog. Because of how compressed the marine layer is, don`t
expect much of an inland push overnight, causing most of the region
to stay cloud free. However, the lack of winds and a slight thermal
belt, look to allow some of the day time heat to linger into the
night, placing lows more into the 50s than the 40s of the last few
nights.

This is all to say the warming trend is continuing.

Monday will offer similar stratus clearing times, but an overall
warmer afternoon. The coast will still be around 60 degrees and the
slightly inland areas in the 70s, but much more of the interior will
break into the mid to upper 80s and more areas in the far interior
will build into the 90s.

&&

.LONG TERM...
Issued at 125 PM PDT Sun May 31 2026
(Monday night through next Saturday)

Overnight temperatures will continue the warming trend as well with
most of the falling into the 50s Monday night into Tuesday, with a
few 60s in the higher elevations due to the influence of the thermal
belt.

Tuesday offers a change of pace as a weak trough disrupts the
ridging pattern. This will push some cloud cover through the area
and offer better onshore flow. High temperatures will see some
modest cooling for most of the district, but mostly on the scale of
a few degrees.

This change in flow will offer a weak cooling trend for the rest of
the work week. More notable cooling looks to arrive as another,
deeper trough builds. Our friends in Oregon may see some rain from
this through, while our current chances seem to be limited to a
coastal drizzle session.

&&

.AVIATION...
(18Z TAFS)
Issued at 1043 AM PDT Sun May 31 2026

Quiet weather is on tap with VFR conditions prevailing for the
majority of the area through the TAF cycle. Breezy onshore winds
will return today and the decrease through the evening hours. Beyond
that, stratus tries to make a return along the San Francisco
Peninsula and then around the Central Coast and into the Salinas
Valley. The marine layer looks to be around 500-1000ft which should
keep things confined the aforementioned areas. MVFR cigs are likely,
though pockets of IFR cigs are possible.

Vicinity of SFO...VFR conditions will prevail through the period,
with onshore flow increasing through the afternoon. Gusts up to 20-
22kt are expected after 21Z, with winds gradually decreasing after
sunset. Opted to hint at a few low clouds developing Monday morning
around sunrise, though VFR conditions will remain. The better chance
for cigs returning looks to be Tuesday morning.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...The stratus has cleared up for the majority
of the Monterey Bay region, leaving terminals with VFR conditions.
This should hold through much of the forecast period, with stratus
making a return early Monday morning. The question will be, whether
we stick to MVFR cigs or go down to IFR. Opted to tweak KMRY to MVFR
cigs and hint at the possibility of IFR conditions. For KSNS, kept
the more pessimistic forecast given this morning`s observations.

&&

.MARINE...
(Tonight through next Friday)
Issued at 259 PM PDT Sun May 31 2026

Fresh to strong northerly winds with occasional near gale force
gusts and rough seas will continue through tonight. Winds begin to
ease into Monday morning, with seas slowly subsiding as well.
Lighter north to northwest winds continue through Tuesday, with
winds increasing for the middle and later parts of the week.

&&

.BEACHES...
Issued at 1201 AM PDT Sun May 31 2026

A Beach Hazards Statement will come into effect at 5 AM today
through Tuesday morning due to an increased risk of sneaker waves
and rip currents. Long period southwest swell is approaching the
Pacific coast, with periods of 18 to 20 seconds and a height of
around 2 feet in the open waters. 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 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.

DialH

&&

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

PZ...Small Craft Advisory until 3 AM PDT Monday for 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.

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

&&

$$

SHORT TERM...Murdock
LONG TERM....Murdock
AVIATION...KR
MARINE...KR

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