---
title: "Costa Mesa CA Weather"
url: https://www.herecostamesa.com/weather/
date: 2026-10-12T08:51:13-07:00
modified: 2026-11-11T13:48:03-08:00
author: ""
site: "HERE Costa Mesa"
attribution: "HERE Costa Mesa"
---

# Costa Mesa CA Weather

*Source: [HERE Costa Mesa](https://www.herecostamesa.com/weather/) — October 12, 2026 by *

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 81°F · Humidity 42% · Wind 8 mph (NWS station KSNA)

## Costa Mesa 5-Day Forecast

DayHighLowForecastTODAY83°60°SunnyTHU79°59°Mostly SunnyFRI72°58°Showers And ThunderstormsSAT71°54°Chance Rain ShowersSUN72°54°Mostly Sunny

## Weather Alerts, Radar and Official Forecast

- [NWS point forecast for Costa Mesa, CA](https://forecast.weather.gov/MapClick.php?lat=33.665905&lon=-117.912336) (hourly and detailed)
- [Active NWS watches, warnings and advisories for Costa Mesa, CA](https://forecast.weather.gov/MapClick.php?lat=33.665905&lon=-117.912336#detailed-forecast)
- [NWS live radar (zoom to Costa Mesa)](https://radar.weather.gov/)
- [NWS SGX forecast office](https://www.weather.gov/sgx/) (local weather stories and briefings)