Cae Cwm-tywyll

{{Short description|Protected area in Carmarthenshire, Wales}}

{{Use dmy dates|date=April 2022}}

{{Infobox SSSI

|name= Cae Cwm-tywyll

|image=

|image_caption=

|aos= Carmarthen

|interest= Biological

|gridref={{gbmappingsmall|SN4812023870}}

|coordinates= {{coord|51.89263|-4.2085591|display=title,inline}}

|displaymap= Wales

|area= 1.65 ha

|notifydate=12 June 1984

|enref=

}}

Cae Cwm-tywyll is an unimproved hay meadow that is a Site of Special Scientific Interest in Carmarthenshire, Wales.