Merthyr Mawr Rainfall ForecastUnited KingdomWLBridgendMerthyr MawrToday 10 Sep80%Fri 11 Sep5%Sat 12 Sep85%Sun 13 Sep50%Mon 14 Sep55%Tue 15 Sep40%Wed 16 Sep10%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Merthyr Mawr rainfall forecast issued today at 7:09 am. Next forecast at approx. 9:09 pm. Rainfall Rainfall AccumulationCobbacombe Cross (Devon) RadarGet WillyWeather+ to remove ads