Lake Forest, CA Weather

Orange County1:29 AM PDT33.65°N, 117.69°WElevation 486 ft

Current conditions

Mostly Cloudy
63°
Mostly Cloudy
Feels like 63°
High 76°·Low 61° tonight
WindCalm
Humidity76%
Dew point55°
Cloud cover59%
UV index0 Low
Sunrise7:01 AM
Sunset6:11 PM

Observed at CW5283 Foothill Ranch · 1 hr ago

Forecast

10-day

  • Tonight

    A slight chance of rain showers after 5am. Partly cloudy, with a low around 61. Southeast wind around 5 mph. Chance of precipitation is 20%.

  • Wednesday

    Rain showers likely. Partly sunny, with a high near 76. South wind 0 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.

  • Wednesday Night

    Rain showers likely before 11pm, then showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a low around 61. Southeast wind around 5 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

National Weather Service forecast updated 13 hrs ago.

Hourly

Hourly forecast
  1. Now Mostly Cloudy 64°
  2. 2 AM Mostly Cloudy 63°
  3. 3 AM Mostly Cloudy 63°
  4. 4 AM Mostly Cloudy 62°
  5. 5 AM Slight Chance Rain Showers 62°18%
  6. 6 AM Slight Chance Rain Showers 62°18%
  7. 7 AM Slight Chance Rain Showers 61°18%
  8. 8 AM Slight Chance Rain Showers 63°18%
  9. 9 AM Slight Chance Rain Showers 67°18%
  10. 10 AM Slight Chance Rain Showers 70°18%
  11. 11 AM Chance Rain Showers 73°43%
  12. 12 PM Chance Rain Showers 74°43%
  13. 1 PM Chance Rain Showers 76°43%
  14. 2 PM Chance Rain Showers 75°43%
  15. 3 PM Chance Rain Showers 75°43%
  16. 4 PM Chance Rain Showers 74°43%
  17. 5 PM Rain Showers Likely 72°62%
  18. 6 PM Rain Showers Likely 71°62%
  19. 7 PM Rain Showers Likely 68°62%
  20. 8 PM Rain Showers Likely 67°62%
  21. 9 PM Rain Showers Likely 66°62%
  22. 10 PM Rain Showers Likely 65°62%
  23. 11 PM Showers And Thunderstorms 64°96%
  24. Thu12 AM Showers And Thunderstorms 64°96%

10-day forecast

Details
  1. TonightOct 20 Partly Cloudy then Slight Chance Rain Showers Partly Cloudy then Slight Chance Rain Showers18%61°
  2. TodayOct 21 Rain Showers Likely Rain Showers Likely96%61°76°
  3. ThuOct 22 Showers And Thunderstorms Showers And Thunderstorms90%57°70°
  4. FriOct 23 Mostly Sunny Mostly Sunny57°72°
  5. SatOct 24 Sunny Sunny60°79°
  6. SunOct 25 Sunny Sunny61°82°
  7. MonOct 26 Sunny Sunny61°83°
  8. TueOct 27 Mostly Sunny Mostly Sunny82°
  9. WedOct 28 Cloudy Cloudy70°91°
  10. ThuOct 29 Cloudy Cloudy64°86°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

Full map
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Weather news near Lake Forest

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Air quality

27
Good
Fine particles (PM2.5)

Air quality is satisfactory, and air pollution poses little or no risk.

Forecast

  • WedGood (44)

Saddleback Vly, CA reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:01 AM
Sunset 6:11 PM
Daylight 11 h 10 min (−1 min 57 s tomorrow)
Waxing Gibbous · 75% lit
Moonrise 3:39 PM Moonset 2:24 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low79° / 58°
Record high100° (1965)
Record low34° (1949)
Wettest0.44 in (1957)
Month to date0.57 in (normal 0.27 in)

Santa Ana Fire Station, records since 1916. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in SGX, issued 2 hrs ago

Synopsis

A low pressure system moving southward off the California coast will bring general cooling through Thursday. It is also expected to produce showers and a slight chance of thunderstorms for late Wednesday through Thursday is it moves inland through California into Nevada. Warmer and drier for next weekend. Offshore flow on Saturday could produce gusty northeast to east winds in and below mountain passes and canyons as well as the Inland Empire corridor between the Cajon Pass and the Santa Ana Mountains. The offshore flow weakens for Sunday into early next week.

Discussion

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

...UPDATED AVIATION DISCUSSION...

The low pressure system west of Point Conception continues to move south before turning east Wednesday. It will move through SoCal on Thursday and Friday. It will bring further cooling, a deepening marine layer with more low clouds, and widespread precipitation. Showers could spread into coastal areas during the afternoon on Wednesday. Those showers are expected to spread farther inland for Wednesday night into Thursday with the greatest chances for thunderstorms for late Wednesday night into Thursday.

Between Wednesday and Thursday night, rainfall across Orange and southwestern San Bernardino Counties could range from around 1 inch near the coast to as much as 2 inches in the mountains. Rainfall for San Diego County will range from around 1 inch in North County to 0.50 to 0.75 near the border. High desert areas will receive around 0.50 inch of rainfall and the low deserts will receive 0.25 inch or less. Probabilities for 0.10 inch or more of rainfall from Wednesday morning through Thursday night exceed 90 percent for the coast, valleys, and mountains. Probabilities for 0.50 inch or more exceed 80 percent for the mountains as far south as the northern half of San Diego County. Probabilities for 1 inch or more range from 15 to 50 percent from the coast to the mountains for Orange and southwestern San Bernardino Counties. Probabilities for 2 inches or more exceed 10 percent for the mountains of southwestern San Bernardino County.

High temperatures on Thursday will range from around 5 degrees below average near the coast to 15 to 20 degrees below average for mountain elevations above 6000 feet. High temperatures on Thursday will be in the 60s to around 70 for the coast and valleys and in the 40s and 50s for the mountains.

Precip tapers off late Thu into Fri as the low pressure system moves eastward into AZ.

Marine

A storm system will move through the coastal waters late Wednesday through Thursday. Southerly winds Wednesday will shift to southwesterly Wednesday night, then westerly Thursday, with occasional wind gusts exceeding 20 knots. There is a 15-25% chance of TSRA Wednesday night through Thursday. No additional hazardous marine conditions are expected Thursday night through Sunday.

Beaches

Surf and tides will continue to diminish overnight.

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.