AccuWeather.com - Costa Mesa
- Offers current local conditions, 5-day, 10-day, 15-day and extended weather forecasts plus weather maps, doppler radar, and historical weather information.
- http://wwwa.accuweather.com/index-forecast.asp?zipcode=92628

Weather Underground: Costa Mesa
- Active advisories, if any. Current conditions, forecast, links to weather maps.
- http://www.weatherunderground.com/cgi-bin/findweather/getForecast?query=Costa+Mesa%2C+California