Groomsport Rainfall ForecastUnited KingdomNINorth DownGroomsportToday 17 Jul50%Fri 18 Jul60%Sat 19 Jul15%Sun 20 Jul45%Mon 21 Jul35%Tue 22 Jul20%Groomsport rainfall forecast issued today at 1:36 am. Next forecast at approx. 3:36 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