California · NWS SGX office

Rancho Santa Margarita, CA weather

It is 60°F at CW5283 Foothill Ranch as of Oct 27, 10:47 PM PDT. Tonight: Mostly Cloudy, low near 54°F. Forecast from the National Weather Service, issued Oct 27, 11:13 PM PDT.

Updated Oct 27, 11:23 PM PDT (snapshot)

Current conditions

Temperature

60°F

Mostly Cloudy

Wind

Calm

Humidity 79% · dew point 54°F

Pressure · visibility

—

Visibility —

Observed at CW5283 Foothill Ranch (C5283), Oct 27, 10:47 PM PDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the Rancho Santa Margarita forecast zone right now.

Around the NWS SGX forecast area

1 active alert covers zones served by the SGX office near Rancho Santa Margarita:

  • Coastal Flood Warning

From the alert snapshot of Oct 28, 2026, 2:15 AM EDT. California has 8 active alerts: see them all.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Rancho Santa Margarita (local time)
TimeTempForecastPrecip. chanceWind
Tue 11 PM58°FMostly Cloudy0%E 5 mph
Wed 12 AM58°FMostly Cloudy0%E 5 mph
Wed 1 AM57°FMostly Cloudy0%E 5 mph
Wed 2 AM57°FMostly Cloudy0%E 5 mph
Wed 3 AM56°FMostly Cloudy0%E 5 mph
Wed 4 AM55°FMostly Cloudy0%E 5 mph
Wed 5 AM55°FMostly Cloudy0%E 5 mph
Wed 6 AM54°FPartly Sunny0%E 5 mph
Wed 7 AM54°FPartly Sunny0%E 5 mph
Wed 8 AM55°FMostly Sunny0%E 5 mph
Wed 9 AM59°FMostly Sunny0% 0 mph
Wed 10 AM62°FMostly Sunny0% 0 mph
Wed 11 AM68°FMostly Sunny0% 0 mph
Wed 12 PM69°FMostly Sunny0%SW 5 mph
Wed 1 PM71°FMostly Sunny0%SW 5 mph
Wed 2 PM73°FSunny0%SW 5 mph
Wed 3 PM72°FSunny0%SW 5 mph
Wed 4 PM71°FSunny0%SW 5 mph
Wed 5 PM70°FMostly Sunny0%SW 5 mph
Wed 6 PM66°FPartly Cloudy0%SW 5 mph
Wed 7 PM63°FPartly Cloudy0%SW 5 mph
Wed 8 PM61°FMostly Cloudy0% 0 mph
Wed 9 PM59°FMostly Cloudy0% 0 mph
Wed 10 PM58°FMostly Cloudy0% 0 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Rancho Santa Margarita can differ.

7-day forecast

Tonight

Low 54°F

Mostly cloudy, with a low around 54. East wind around 5 mph.

Wednesday

High 73°F·Low 54°F

Mostly sunny, with a high near 73. South wind 0 to 5 mph.

Wednesday Night: Mostly cloudy, with a low around 54. Southeast wind 0 to 5 mph.

Thursday

High 72°F·Low 58°F

Partly sunny, with a high near 72. Southeast wind 0 to 5 mph.

Thursday Night: A slight chance of rain showers between 11pm and 5am. Mostly cloudy, with a low around 58. South wind 0 to 5 mph. Chance of precipitation is 20%.

Friday

High 69°F·Low 55°F

Partly sunny, with a high near 69.

Friday Night: Mostly cloudy, with a low around 55.

Saturday

High 69°F·Low 56°F

Rain showers likely after 11am. Mostly cloudy, with a high near 69.

Saturday Night: Rain showers likely. Cloudy, with a low around 56.

Sunday

High 68°F·Low 54°F

A chance of rain showers. Partly sunny, with a high near 68.

Sunday Night: A slight chance of rain showers before 10pm. Partly cloudy, with a low around 54.

Monday

High 74°F·Low 56°F

Sunny, with a high near 74.

Monday Night: Mostly clear, with a low around 56.

Tuesday

High 74°F

Mostly sunny, with a high near 74.

Nearby cities

Larger cities in the area

Other cities in Orange County

See every city we cover in California, or check all active alerts.

About this forecast

Forecast office
Rancho Santa Margarita is served by the National Weather Service SGX forecast office, forecast zone CAZ554, county zone CAC059.
Location used
The Census Bureau's internal point for Rancho Santa Margarita (33.6323, -117.5990), in Orange County. Population: 46,353 (2024 estimate), number 191 of the 296 California cities on this site.
Radar
Nearest NWS radar: KSOX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/33.6323,-117.599 (forecast issued Oct 27, 11:13 PM PDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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