Current Predictions at Golden Gate Bridge, 0.8 mile east of

Starting on 2026-07-18 PDT

Current forecasts are generated by NOAA. These do not include effects of rainfall. Following heavy rains, you may expect stronger ebbs and delayed and reduced floods, particularly where the data provided are for greater depths.

• Currents from NOAA
• Sunrise/set by SunriseSunset.io

FXUS66 KMTR 182035
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco CA
135 PM PDT Sat Jul 18 2026

...New SHORT TERM, LONG TERM, FIRE WEATHER...

.KEY MESSAGES...
Updated at 120 PM PDT Sat Jul 18 2026

 - Near or slightly below normal temperatures and higher humidity
   through the first half of the upcoming week.

 - The marine layer and mid to upper level cloud cover will
   continue to help keep temperatures cooler under building high
   pressure.

&&

.SHORT TERM...
Issued at 120 PM PDT Sat Jul 18 2026
(This evening through Sunday night)

Stratus retreated back to the immediate coastline by late this 
morning. A few spots from Pacifica south to Monterey may only see 
partial clearing through mid-afternoon. A slightly stronger marine 
layer (~1500-2000ft) across the North Bay valleys has temperatures 
running 5-10 degrees cooler than this time yesterday, so have 
adjusted todays highs there about 3-5 degrees cooler from the NBM. 
The onset of a relatively normal diurnal intrusion of the marine 
layer this evening will occur with a similarly normal exit Sunday
morning. Patchy coastal and valley fog is most likely across the 
North Bay with little to no impacts expected. A weak fetch of 
offshore flow/thermal belting at 925MB will keep overnight lows at
higher elevations over the East Bay Hills and Santa Lucias well 
above normal with poor overnight RH recovery. Light winds will 
help mitigate fire weather concerns somewhat, but any ignition 
could spread quickly on steep slopes.

&&

.LONG TERM...
Issued at 120 PM PDT Sat Jul 18 2026
(Monday through next Friday)

Temperatures will be near or below normal through the extended 
forecast with Tuesday being the warmest day of the week despite 
building high pressure. The marine layer influence, especially for 
the Bay Area and North Bay, will help to keep temperatures close
to or below normal. Not much change to the expected push of 
monsoonal/tropical moisture from the south as Elida tracks north 
after becoming extratropical. PWATS near 2.0" and 150%-200% of 
normal are expected to peak Tuesday afternoon. Attm slight H50 
height rises and anemic mid-level lapse rates less than 7C/km 
indicate a low probability of elevated convection (and dry 
lightning potential) developing. However, mid-level cloud cover 
spreading east from the remnants of Elida over the EPAC will
further help to keep temperatures in check for the first half of 
the week, including Tuesday.

&&

.AVIATION...
(18Z TAFS)
Issued at 1045 AM PDT Sat Jul 18 2026

Improving flight categories are forecast at all terminals with 
VFR anticipated at most terminals (except KHAF) in the next 1-2 
hours. There is high confidence in this transpiring. MVFR to IFR 
is anticipated to return this evening and into the pre-dawn hours 
on Sunday. Confidence in the onset time is medium. Confidence in 
MVFR at SJC and LVK is relatively lower, compared to other terminals,
but model consensus does favor at least a few hours of MVFR. 
There are chances for LIFR ceilings/visibility at SNS and APC, 
however, the depth of the marine layer may be sufficient to 
mitigate this threat. Trends will be monitored as the potential is
non-zero. VFR will return late morning/early Sunday afternoon.

Vicinity of SFO...VFR currently with MVFR returning this evening 
due to a marine layer push. East to variable winds at the start of
the TAF period are anticipated to become more WNW'ly by 20Z today.
Gusts as great as 25 knots are advertised with medium to high 
confidence. Confidence in the onset of MVFR cigs around 03Z Sunday
is medium and there could be impacts to the evening push. Some 
model guidance advertises IFR ceilings, but confidence is not high
enough to include in the TAF at this time. VFR is anticipated to 
return mid-morning Sunday. 

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR this afternoon with MVFR/IFR ceilings 
returning quickly, near or just after 00Z Sunday. There is some 
potential for IFR visibility, however, the threat seems too low to
include in the TAF at this time. There's a chance that VFR may 
return before the end of the current TAF period (17Z Sunday), but 
for now will opt for simplicity given the range in the TAF. 

&&

.MARINE...
(Today through Thursday)
Issued at 1045 AM PDT Sat Jul 18 2026

Moderate to fresh northwesterly breezes will prevail over the
weekend, diminishing to become moderate by next week. Moderate
seas will also prevail. Moderate southerly swell will increase
from tropical cyclone activity across the eastern Pacific through
next week.

&&

.FIRE WEATHER...
Issued at 120 PM PDT Sat Jul 18 2026

Cooler than normal temperatures with assistance from onshore flow 
and relatively normal diurnal intrusion of the marine layer will 
continue through the weekend into next week. RH recovery will be 
excellent for coastal areas and valleys, and moderate to good 
farther inland. However weak offshore flow/thermal belting will 
result in poor RH for higher elevations, especially above 1500-
2000ft across the East Bay Hills and Santa Lucias.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...Small Craft Advisory until 3 AM PDT Sunday for Pt Arena to Pt 
     Reyes 10-60 NM.

&&

$$

SHORT TERM...JM
LONG TERM....JM
AVIATION...Bain
MARINE...Bain

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