Costa Mesa CA Weather
Today's Costa Mesa, CA weather forecast, current conditions and official National Weather Service alerts. Conditions and the forecast below come straight from the NWS SGX forecast office and refresh through the day. For warnings during severe storms, heat, flooding or winter weather, always check the NWS links below.
Current Conditions in Costa Mesa
81°F Clear · Feels like 80°F · Humidity 34% · Wind 8 mph (NWS station KSNA)
Costa Mesa 5-Day Forecast
| Day | High | Low | Forecast |
|---|---|---|---|
| TODAY | 83° | 60° | Sunny |
| THU | 79° | 59° | Mostly Sunny |
| FRI | 72° | 58° | Showers And Thunderstorms |
| SAT | 71° | 54° | Chance Rain Showers |
| SUN | 72° | 54° | Mostly Sunny |
Weather Alerts, Radar and Official Forecast
- NWS point forecast for Costa Mesa, CA (hourly and detailed)
- Active NWS watches, warnings and advisories for Costa Mesa, CA
- NWS live radar (zoom to Costa Mesa)
- NWS SGX forecast office (local weather stories and briefings)