Santa Ana River Mouth (Inside) Rainfall ForecastUnited StatesCAOrange CountySanta Ana River Mouth (Inside)Today 19 AprNo RainSun 20 AprNo RainMon 21 AprNo RainTue 22 AprNo RainWed 23 AprNo RainThu 24 AprNo RainFri 25 AprNo RainSanta Ana River Mouth (Inside) rainfall forecast issued today at 2:04 am. Next forecast at approx. 4:04 pm.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