Foothill Ranch, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

616
FXUS66 KSGX 060836
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
136 AM PDT Tue Oct 6 2026

.SYNOPSIS...
This long-duration heatwave will continue for the coast and
valleys through Thursday and through Friday for the lower deserts.
Cooling will spread inland for Friday and Saturday with Saturday
high temperatures still around 5 degrees above average. For Sunday
through early next week, a low pressure system along the West
Coast and off the coast of Baja may draw moisture from what was
Hurricane Rachel northeastward and into the area with a chance of
showers.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

.SHORT TERM (Today through Thursday)...
Widespread Major to Extreme HeatRisk for the coast and valleys
for today will decrease to Moderate to Major HeatRisk on Thursday.
High temperatures on Thursday will still be 12 to 18 degrees
above average for the coast and valleys and 10 to 15 degrees above
average for the mountains and deserts. High temperatures on
Thursday will range from the 80s near the coast to the upper 90s
to 104 for the Inland Empire with 104 to 108 for the lower deserts
with Major HeatRisk for the lower deserts.

A shallow marine layer will return around early Wednesday or early
Thursday and slowly deepen into the weekend with the return of low
clouds and fog initially in the form of dense fog near the coast.

&&

.LONG TERM (Friday through Monday)...
High pressure across the area will weaken as low pressure develops
along the West Coast and the adjacent eastern Pacific. High
temperatures will cool a few degrees on Friday and another 4 to 8
degrees on Saturday with high temperatures on Saturday still
around 5 degrees above average. High temperatures on Saturday will
range from the mid 70s to the lower 80s near the coast to the mid
80s to lower 90s for the Inland Empire with the lower deserts in
the upper 90s.

On Sunday into early next week, that low pressure system along the
West Coast and off the coast of Baja may draw moisture from what
was Hurricane Rachel northeastward and into the area with a chance
of showers. For early Sunday to early Tuesday, the NBM chance for
0.10 inch or more of rainfall is 30 to 40 percent for the coast
to the mountains with the chance for 0.50 or more 15 to 25 percent
and the chance for 1 inch or more 10 to 15 percent.

High temperatures for the coast and valleys will cool from the mid
70s to lower 80s on Sunday to the 70s on Monday with the lower
deserts cooling from the lower 90s on Sunday to the 80s on Monday.

&&

.AVIATION...
060600Z...Mostly clear skies through Tuesday morning, followed by
SCT-BKN cumulus clouds based at 8-12 kft inland after 18Z Tuesday.

&&

.MARINE...
No hazardous marine conditions are expected through Friday.

&&

.BEACHES...
Increasing south swell will create elevated surf of 3-5 feet with
sets to 6 feet along south and southwest facing beaches starting
Wednesday. Strong rip currents are expected. In addition, this
elevated surf will combine with high tides during the mornings and
evenings to generate minor coastal flooding and beach erosion. The
Beach Hazards Statement and Coastal Flood Advisory contain the
details.

&&

.CLIMATE...
The average temperature for San Diego of 88.5 on October 3rd and
87 on October 4th are now the two warmest for October.

&&

.SKYWARN...
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Extreme Heat Warning until 8 PM PDT Thursday for Orange County
     Coastal Areas-Orange County Inland Areas-San Bernardino and
     Riverside County Valleys-The Inland Empire-San Diego County
     Coastal Areas-San Diego County Valleys-Santa Ana Mountains
     and Foothills.

     Beach Hazards Statement from this afternoon through Friday
     evening for Orange County Coastal Areas-San Diego County
     Coastal Areas.

     Coastal Flood Advisory from 6 AM Wednesday to 11 AM PDT Friday
     for Orange County Coastal Areas-San Diego County Coastal
     Areas.

     Extreme Heat Watch from Wednesday morning through Friday evening
     for Coachella Valley-San Diego County Deserts-San Gorgonio
     Pass near Banning.

PZ...None.

&&

$$

PUBLIC/CLIMATE...17
AVIATION/MARINE/BEACHES...MM