Costa Mesa, CA Weather

Orange County4:40 AM PDT33.64°N, 117.92°WElevation 98 ft

Current conditions

Mostly Cloudy
66°
Mostly Cloudy
Feels like 66°
High 76°·Low 63° tonight
WindCalm
Humidity83%
Dew point61°
Pressure29.84 inHg
Visibility10 mi
Cloud cover50%
UV index0 Low
Sunrise7:02 AM
Sunset6:12 PM

Observed at John Wayne-Orange County Airport · 1 hr ago

Forecast

10-day

  • Overnight

    Partly cloudy, with a low around 63. East wind around 5 mph.

  • Wednesday

    A chance of rain showers between 11am and 2pm, then showers and thunderstorms. Partly sunny, with a high near 76. Southeast wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

  • Wednesday Night

    Showers and thunderstorms. Cloudy, with a low around 62. South wind 0 to 5 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

National Weather Service forecast updated 1 hr ago.

Hourly

Hourly forecast
  1. Now Partly Cloudy 64°
  2. 5 AM Partly Cloudy 63°
  3. 6 AM Mostly Sunny 63°
  4. 7 AM Mostly Sunny 63°
  5. 8 AM Sunny 65°
  6. 9 AM Sunny 70°
  7. 10 AM Sunny 72°
  8. 11 AM Chance Rain Showers 74°54%
  9. 12 PM Chance Rain Showers 75°54%
  10. 1 PM Chance Rain Showers 75°54%
  11. 2 PM Chance Showers And Thunderstorms 74°54%
  12. 3 PM Chance Showers And Thunderstorms 74°54%
  13. 4 PM Chance Showers And Thunderstorms 73°54%
  14. 5 PM Showers And Thunderstorms 72°92%
  15. 6 PM Showers And Thunderstorms 70°92%
  16. 7 PM Showers And Thunderstorms 69°92%
  17. 8 PM Showers And Thunderstorms 68°92%
  18. 9 PM Showers And Thunderstorms 66°92%
  19. 10 PM Showers And Thunderstorms 66°92%
  20. 11 PM Showers And Thunderstorms 66°75%
  21. Thu12 AM Showers And Thunderstorms 66°75%
  22. 1 AM Showers And Thunderstorms 65°75%
  23. 2 AM Showers And Thunderstorms 65°75%
  24. 3 AM Showers And Thunderstorms 64°75%

10-day forecast

Details
  1. TonightOct 20 Partly Cloudy Partly Cloudy63°
  2. TodayOct 21 Showers And Thunderstorms Showers And Thunderstorms92%62°76°
  3. ThuOct 22 Showers And Thunderstorms Showers And Thunderstorms81%59°69°
  4. FriOct 23 Sunny Sunny57°70°
  5. SatOct 24 Sunny Sunny59°76°
  6. SunOct 25 Sunny Sunny60°79°
  7. MonOct 26 Sunny Sunny60°80°
  8. TueOct 27 Mostly Sunny Mostly Sunny78°
  9. WedOct 28 Cloudy Cloudy68°85°
  10. ThuOct 29 Cloudy Cloudy68°80°

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

Radar

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Weather news near Costa Mesa

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Air quality

Forecast

  • WedGood (37)

N Coastal Orange, CA reporting area. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:02 AM
Sunset 6:12 PM
Daylight 11 h 10 min (−1 min 58 s tomorrow)
Waxing Gibbous · 77% lit
Moonrise 3:40 PM Moonset 2:25 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low77° / 58°
Record high99° (1965)
Record low49° (1962)
Wettest0.12 in (1992)
Month to date0.38 in (normal 0.28 in)

Long Beach Area, records since 1958. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in SGX, issued 58 min 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.

Aviation

210530Z... Coast/Valleys...Areas of low clouds based around 1800-2200 feet MSL will increase through 10Z, then decrease after 12Z.

Region-wide...A band of -SHRA/RA will move through the region from west to east 21-06Z Wednesday afternoon and evening. A few hours of cigs 2000-3000 feet and intermittent MVFR vis expected for each TAF site in the coastal basin. A few embedded heavier showers may produce local IFR conditions, mainly north of SD County. Winds shift from south to southwest as the precip band passes through.

Marine

A storm system will move through the coastal waters late today through Thursday. Southerly winds today will shift to southwesterly tonight, then westerly Thursday, with occasional wind gusts exceeding 20 knots. There is a 10-20% chance of TSRA tonight through Thursday. No additional hazardous marine conditions are expected Thursday night through Sunday.

Skywarn

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

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.