Portstewart Rainfall ForecastUnited KingdomNIColerainePortstewartToday 21 Jul10%Wed 22 Jul10%Thu 23 Jul20%Fri 24 Jul10%Sat 25 Jul50%Sun 26 Jul35%Mon 27 Jul35%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Portstewart rainfall forecast issued today at 1:40 pm. Next forecast at approx. . Rainfall Rainfall AccumulationCastor Bay (Lurgan) RadarGet WillyWeather+ to remove ads