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Rancho Santa Margarita, CA Weather

Live radar, hourly and 7-day forecast, and National Weather Service alerts for Rancho Santa Margarita, Orange County, California.

Updated Jul 29, 2026, 2:06 PM local time · Radar refreshes every 5 minutes

☀️
Rancho Santa Margarita
Clear
88°F
Feels like 94°F
Wind 8 mph
Humidity 45%
Cloud cover 2%
UV index 8
Alerts 5

Active alerts (5)

Extreme Heat WarningSevere
Orange County Inland
Until Jul 30, 2026, 5:15 AM
Full details 
* WHAT...Dangerously hot conditions with high temperatures mid 90s
east of Interstate 5 expected.

* WHERE...Orange County Inland Areas.

* WHEN...From 10 AM Friday to 8 PM PDT Sunday.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Heat AdvisoryModerate
Orange County Coastal
Until Jul 30, 2026, 5:15 AM
Full details 
* WHAT...High temperatures in the mid 80s to lower 90s for higher
coastal terrain expected.

* WHERE...Orange County Coastal Areas.

* WHEN...From 10 AM Friday to 8 PM PDT Sunday.

* IMPACTS...Hot temperatures may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Beach Hazards StatementModerate
San Diego County Coastal Areas; Orange County Coastal
Until Jul 30, 2026, 12:15 AM
Full details 
* WHAT...For the Beach Hazards Statement, surf of 3-6 feet with
sets to 7 feet expected. For the Coastal Flood Advisory, minor
coastal flooding expected during evening high tides. For the
High Surf Advisory, large breaking waves of 5-8 feet with sets
up to 9 feet on south-southwest facing beaches and 3-6 feet on
west- facing beaches.

* WHERE...San Diego County Coastal Areas and Orange County
Coastal Areas.

* WHEN...For the Beach Hazards Statement, through this afternoon.
For the Coastal Flood Advisory, from 5 PM today to 3 AM PDT
Saturday. For the High Surf Advisory, from 5 PM today to 5 PM
PDT Saturday.

* IMPACTS...Flooding of low-lying beach parking lots,
boardwalks, and roads. Dangerous swimming and surfing
conditions and localized beach erosion. Breaking waves can
sweep people off jetties and docks, and into dangerous seas.

* ADDITIONAL DETAILS...A long period southerly swell (200 degrees)
of 3 feet at 17 seconds continues through Wednesday. A higher
amplitude swell (from 160-190 degrees) associated with Hurricane
Genevieve of around 5 feet at 14 seconds builds late today into
Thursday. Highest surf expected Thursday and Friday when the
swell direction is 180-190 degrees. Swell and associated surf
look to subside late Saturday into Sunday.

A Coastal Flood Advisory indicates that onshore winds and tides
will combine to generate flooding of low areas along the shore.

Stay tuned to NOAA Weather Radio...the National Weather Service
website at weather.gov/sandiego...or local media for updates.

Inexperienced swimmers should remain out of the water due to
dangerous surf conditions.
Coastal Flood AdvisoryMinor
San Diego County Coastal Areas; Orange County Coastal
Until Jul 30, 2026, 12:15 AM
Full details 
* WHAT...For the Beach Hazards Statement, surf of 3-6 feet with
sets to 7 feet expected. For the Coastal Flood Advisory, minor
coastal flooding expected during evening high tides. For the
High Surf Advisory, large breaking waves of 5-8 feet with sets
up to 9 feet on south-southwest facing beaches and 3-6 feet on
west- facing beaches.

* WHERE...San Diego County Coastal Areas and Orange County
Coastal Areas.

* WHEN...For the Beach Hazards Statement, through this afternoon.
For the Coastal Flood Advisory, from 5 PM today to 3 AM PDT
Saturday. For the High Surf Advisory, from 5 PM today to 5 PM
PDT Saturday.

* IMPACTS...Flooding of low-lying beach parking lots,
boardwalks, and roads. Dangerous swimming and surfing
conditions and localized beach erosion. Breaking waves can
sweep people off jetties and docks, and into dangerous seas.

* ADDITIONAL DETAILS...A long period southerly swell (200 degrees)
of 3 feet at 17 seconds continues through Wednesday. A higher
amplitude swell (from 160-190 degrees) associated with Hurricane
Genevieve of around 5 feet at 14 seconds builds late today into
Thursday. Highest surf expected Thursday and Friday when the
swell direction is 180-190 degrees. Swell and associated surf
look to subside late Saturday into Sunday.

A Coastal Flood Advisory indicates that onshore winds and tides
will combine to generate flooding of low areas along the shore.

Stay tuned to NOAA Weather Radio...the National Weather Service
website at weather.gov/sandiego...or local media for updates.

Inexperienced swimmers should remain out of the water due to
dangerous surf conditions.
High Surf AdvisoryMinor
San Diego County Coastal Areas; Orange County Coastal
Until Jul 30, 2026, 12:15 AM
Full details 
* WHAT...For the Beach Hazards Statement, surf of 3-6 feet with
sets to 7 feet expected. For the Coastal Flood Advisory, minor
coastal flooding expected during evening high tides. For the
High Surf Advisory, large breaking waves of 5-8 feet with sets
up to 9 feet on south-southwest facing beaches and 3-6 feet on
west- facing beaches.

* WHERE...San Diego County Coastal Areas and Orange County
Coastal Areas.

* WHEN...For the Beach Hazards Statement, through this afternoon.
For the Coastal Flood Advisory, from 5 PM today to 3 AM PDT
Saturday. For the High Surf Advisory, from 5 PM today to 5 PM
PDT Saturday.

* IMPACTS...Flooding of low-lying beach parking lots,
boardwalks, and roads. Dangerous swimming and surfing
conditions and localized beach erosion. Breaking waves can
sweep people off jetties and docks, and into dangerous seas.

* ADDITIONAL DETAILS...A long period southerly swell (200 degrees)
of 3 feet at 17 seconds continues through Wednesday. A higher
amplitude swell (from 160-190 degrees) associated with Hurricane
Genevieve of around 5 feet at 14 seconds builds late today into
Thursday. Highest surf expected Thursday and Friday when the
swell direction is 180-190 degrees. Swell and associated surf
look to subside late Saturday into Sunday.

A Coastal Flood Advisory indicates that onshore winds and tides
will combine to generate flooding of low areas along the shore.

Stay tuned to NOAA Weather Radio...the National Weather Service
website at weather.gov/sandiego...or local media for updates.

Inexperienced swimmers should remain out of the water due to
dangerous surf conditions.

Rancho Santa Margarita weather radar

Light Heavy

Next 24 hours

Now
☀️
88°F
 
3 PM
☀️
87°F
 
4 PM
☀️
86°F
 
5 PM
☀️
84°F
 
6 PM
☀️
82°F
 
7 PM
☀️
78°F
 
8 PM
☀️
73°F
 
9 PM
☀️
69°F
 
10 PM
☁️
67°F
 
11 PM
🌫️
66°F
 
12 AM
🌫️
66°F
 
1 AM
🌫️
66°F
 
2 AM
🌫️
65°F
 
3 AM
🌫️
65°F
 
4 AM
🌫️
64°F
 
5 AM
🌫️
64°F
 
6 AM
🌫️
64°F
 
7 AM
🌫️
63°F
 
8 AM
⛅
67°F
 
9 AM
☀️
73°F
 
10 AM
☀️
80°F
 
11 AM
☀️
85°F
 
12 PM
☀️
89°F
 
1 PM
☀️
93°F
 

7-day forecast

Today
Jul 29
🌫️
88°F
66°F
Thu
Jul 30
🌫️
93°F
63°F
Fri
Jul 31
🌫️
97°F
61°F
Sat
Aug 1
☀️
98°F
77°F
Sun
Aug 2
☁️
95°F
77°F
Mon
Aug 3
☁️
94°F
74°F
Tue
Aug 4
☀️
89°F
72°F

Weather near Rancho Santa Margarita

5 mi Mission Viejo, CA5 mi Lake Forest, CA5 mi Ladera Ranch, CA7 mi Laguna Hills, CA7 mi Laguna Woods, CA9 mi Aliso Viejo, CA10 mi Laguna Niguel, CA10 mi San Juan Capistrano, CA
Alerts are relayed from the National Weather Service and may lag the official source. In a life-threatening situation always follow weather.gov and local emergency broadcasts.

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