San Diego Forecast Discussion
056
FXUS66 KSGX 082343
AFDSGX
Area Forecast Discussion
National Weather Service San Diego CA
444 PM PDT Mon Jun 8 2026
.SYNOPSIS...
Warming conditions expected this week. Hottest conditions are
expected Thursday through Saturday for most locations, potentially
into Sunday for the deserts. Moderate HeatRisk is expected across
inland areas. The marine layer is expected to get shallower, staying
confined to coastal areas through much of this week.
&&
.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
...Updated Aviation, Marine, and Beaches discussions...
High temperatures today are expected to be a few degrees warmer than
yesterday for most locations. An additional 3 to 5 degrees of
warming is expected on Tuesday, which will bring conditions to a few
degrees above average for inland areas and up to 8 degrees above
average for the coast.
High pressure aloft will build over the Pacific for the middle to
end of the week. Through the forecast period the ridge axis is
expected to stay to our west, but with California in it`s periphery
highs will increase. Warmest conditions will likely be Thursday
through Saturday, with highs 6 to 12 degrees above average. Areas of
moderate HeatRisk are expected for the Inland Empire and the
deserts, with more localized areas of moderate HeatRisk in the far
eastern San Diego county valleys. Widespread moderate with areas of
localized major HeatRisk expected in the low deserts on Saturday.
Based on current forecast, high temperatures do not look record
breaking but some low temperature records will be in jeopardy.
The position of the ridge could allow for some subtropical moisture
to sneak into the southwestern United States by the end of the week.
Ensemble members of both the GEFS and ECMWF show a notable increase
in precipitable water into the low deserts Friday, with less but
still elevated precipitable water Saturday and Sunday. The forecast
looks to remain dry at this time so it looks like the main impact
from this moisture surge would be tempering the highs across the
deserts and an increase in high clouds. Current forecast for the low
deserts is 108-112 degrees Friday and Saturday, but if the moisture
surge materializes high temperatures would likely be lower than
that.
There is some uncertainty with highs Sunday, especially for the
desert areas. Highs in the desert have the potential to be hotter on
Sunday compared to Friday/Saturday if the moisture surge is
significantly weaker. There is higher confidence that areas west of
the mountains will cool a degree or two by Sunday.
For much of this week the marine layer is expected to be on the
shallower side, staying confined to coastal areas.
&&
.AVIATION...
082330Z...Coast/Valleys...Low clouds based at 2000-2500 feet MSL
will cover KSAN/KCRQ first and gradually move north overnight,
locally into the inland valleys. Bases will drop to 1500-2000 feet
and local inland vis 0-5SM. Scatter out Tuesday, around 16-17Z.
Mountains/Deserts...Thin high clouds tonight clearing Tuesday.
Westerly winds with gusts 25-40 kts through mountain passes and
locally into deserts through 09Z. Pockets of MOD up/downdrafts and
LLWS in lee of mountains.
&&
.MARINE...
No hazardous marine conditions are expected through Saturday.
&&
.BEACHES...
Surf and rip current activity to increase tonight into Tuesday
morning as a southerly swell arrives. Surf peaks Tue-Wed with surf 4-
7 feet with sets up to 12 feet at south-facing beaches, then
gradually diminishes late this week. See the Beach Hazards Statement
for more details.
&&
.SKYWARN...
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.
&&
.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement from late tonight through Thursday
afternoon for Orange County Coastal Areas-San Diego County
Coastal Areas.
PZ...None.
&&
$$
PUBLIC...CO
AVIATION/MARINE/BEACHES...MM
NWS SGX Office Area Forecast Discussion
