Ynys Gwylan-fawr Rainfall ForecastUnited KingdomWLGwyneddYnys Gwylan-fawrToday 1 Jul50%Thu 2 Jul10%Fri 3 Jul10%Sat 4 Jul15%Sun 5 Jul10%Mon 6 Jul15%Tue 7 Jul10%Ynys Gwylan-fawr rainfall forecast issued today at 1:36 pm. Next forecast at approx. 3:36 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Rainfall Rainfall AccumulationCrug-y-Gorllwyn (Carmarthenshire) RadarGet WillyWeather+ to remove ads