If the forecast is looking grim, why not spend your day at Carmarthen Heritage Centre? You'll be surprised just how many interesting facts you can uncover about the past here.
This collection of historical artifacts in Carmarthen is popular with travelers, so leave a spot for it on your schedule. Don't think that's all there is to do here, though. There are a lot more spots ready for you to discover after Carmarthen Heritage Centre. Carmarthenshire County Museum, Picton Monument, and Afon Gwili are not far away.