Ynys Gwylan-fawr Rainfall ForecastUnited KingdomWLGwyneddYnys Gwylan-fawrToday 24 Aug5%Tue 25 Aug55%Wed 26 Aug60%Thu 27 Aug45%Fri 28 Aug35%Sat 29 Aug20%Sun 30 Aug35%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Ynys Gwylan-fawr rainfall forecast issued today at 1:09 pm. Next forecast at approx. 3:09 am. Rainfall Rainfall AccumulationCrug-y-Gorllwyn (Carmarthenshire) RadarGet WillyWeather+ to remove ads