If you haven't noticed already, a webcam has been installed near the coastguard bridge, looking at the railway on the sea wall, just east of Dawlish station.
http://cdn.livestream.com/embed/RCDawlish?layout=4&color=0xe7e7e7&autoPlay=true&mute=false&iconColorOver=0x888888&iconColor=0x777777&allowchat=false
Worth a look.
Rob