Portstewart Rainfall ForecastUnited KingdomNIColerainePortstewartToday 3 Mar15%Wed 4 Mar55%Thu 5 Mar85%Fri 6 MarNo RainSat 7 Mar10%Sun 8 Mar15%Portstewart rainfall forecast issued today at 6:36 am. Next forecast at approx. 8:36 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Castor Bay (Lurgan) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads