Santa Ana River Mouth Rainfall ForecastUnited StatesCAOrange CountySanta Ana River MouthToday 17 Apr15%Fri 18 Apr10%Sat 19 AprNo RainSun 20 AprNo RainMon 21 AprNo RainTue 22 AprNo RainWed 23 AprNo RainSanta Ana River Mouth rainfall forecast issued today at 2:04 pm. Next forecast at approx. 4:04 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Santa Ana Mountains RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads