Derwydd (Llandybie) UV IndexUnited KingdomWLCarmarthenshireDerwydd (Llandybie)1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAADerwydd (Llandybie) UV forecast issued today at 7:51 pm. Next forecast at approx. 7:51 pm. UV IndexGet WillyWeather+ to remove ads