It's looking serious now for Perranporth & Bude. St Ives faces east so it's relatively OK, though there could be overtopping around the harbour as there will be some big wave setup surges. Properties on Porthmeor beach are at risk but they are mainly 2nd homes claiming a fake rate rebate,, so . . .!
I wouldn't like to be in Mullion, Porthleven or Marazion either. Penzance & Newlyn face E-SE so are protected to a degree.
The wind may well be the most serious issue, not the sea, unusual for N & W Cornwall. This is because the storms fast movement, and the fact the storm reaches maximum intensity over the UK not when it's sitting in mid Atlantic, means the swell height won't be that exceptional. It was bigger than the currently forecast heights on at least 3 occasions in 2014, and a good deal bigger in March 2008, when the significant wave height hit 13 metres at Sevenstones, just off Lands End. The largest sets around 50% bigger. Worth a look, the biggest sea in living memory according to Terry (the coxswain of the Sennen lifeboat) & John Chappell, who is involved with NCI Gwennap Head & runs the Lands End weather station. Click image for high res version
Current significant wave height forecasts for Sevenstones 8-10m peak tomorrow morning. 11m has a 5 year return period. But the wind . . .
. . and Winter's been so benign here so far.