Weather in Costa Mesa
Current conditions, today's hourly forecast, and a 3-day outlook for Costa Mesa, United States (America/Los_Angeles). Data from WeatherAPI.com.
- High / Low
- 20° / 26°
- Wind
- 10 km/h SSE
- Humidity
- 78%
- Rain today
- 11%
- UV
- 0
Active alerts
- Heat Advisory Moderate
Heat Advisory issued July 28 at 9:01PM PDT until August 2 at 8:00PM PDT by NWS San Diego CA
Areas: Orange County Coastal
→
* 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.
- Extreme Heat Warning Severe
Extreme Heat Warning issued July 28 at 9:01PM PDT until August 2 at 8:00PM PDT by NWS San Diego CA
Areas: Santa Ana Mountains and Foothills
→
* WHAT...Dangerously hot conditions with temperatures of 90 to 100 expected. * WHERE...Santa Ana Mountains and Foothills. * WHEN...From 10 AM Friday to 8 PM PDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.
- Extreme Heat Warning Severe
Extreme Heat Warning issued July 28 at 9:01PM PDT until August 2 at 8:00PM PDT by NWS San Diego CA
Areas: Orange County Inland
→
* WHAT...Dangerously hot conditions with high temperatures mid to upper 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.
- Heat Advisory Moderate
Heat Advisory issued July 29 at 3:16AM PDT until August 2 at 8:00PM PDT by NWS San Diego CA
Areas: Orange County Coastal
→
* 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.
- Extreme Heat Warning Severe
Extreme Heat Warning issued July 29 at 3:16AM PDT until August 2 at 8:00PM PDT by NWS San Diego CA
Areas: Orange County Inland
→
* WHAT...Dangerously hot conditions with high temperatures mid to upper 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.
Today, hour by hour
- 08:00
21° 18% - 09:00 22° 14%
- 10:00 23° 10%
- 11:00
24° 8% - 12:00 25° 9%
- 13:00 26° 7%
- 14:00 25° 12%
- 15:00 26° 3%
3-day outlook
- Wed 29 Jul Sunny Rain 11% 20° / 26°
- Thu 30 Jul Sunny Rain 4% 21° / 27°
- Fri 31 Jul Sunny Rain 4% 22° / 27°