If you planning to travel to Carmarthen Castle, Carmarthen, Wales, United Kingdom, here is your 6-day travel weather forecast to make sure you have all the essentials needed during your stay. Start your day when the sunrises at 8:25 AM. The temperature feels like 47.849999999999994 with a humidity level of 91 so dress accordingly. Cloud coverage is 67 percent with visibility at 14.9 percent. Today’s UV index is 0, don’t forget the sunscreen if you need it! Today’s winds are traveling southwest at a speed of 12 MPH. At the end of the day don’t miss the sunset at 4:16 PM.