The two women got cut off by the tide yesterday afternoon (Wednesday 11th July)
The 2 ladies contacted the RNLI via their Facebook page because they didn't know what to do when the water started rising at Orcombe Point.
One of the administrators of the Facebook group who was on duty at Ilfracombe told them high tide was imminent and to call 999.
Crews were paged and on the scene in 3 minutes.
Last night one of the ladies thanked crews, on Facebook.
But the RNLI is warning that social media is not the best way of contacting them.
Andy Stott advised: ‘If you find yourself or see someone you think is in danger, please call 999 or 112 immediately. If you’re going for a walk along the beach, please check tide times by using a phone app, speaking to the RNLI Lifeguards or picking up a tide table from our shop. The ladies were lucky our Facebook Admins were close to their phones this afternoon – this is not a reliable method of calling for help, as sometimes messages aren’t read immediately.’