Today in Ystradgynlais,warning: strong gusts in the morning. Skies very cloudy to overcast in the morning, low cloud developing into fog in the afternoon. Light rain followed by showers in the morning, possibility of showers in the afternoon.
The reliability of the situation is very good.
Temperatures will vary between 9 and 13°C.
Tonight,cloudy and humid with a risk of fog. Drizzle in the early hours. Light winds.