Durgan is very exposed, and it's not much better up river at Helford village/Passage, in easterlies. However, people seem to leave boats out all year more than in the past. We used to hide in Frenchman's in easterlies, or Port Navas for deeper water. Extreme weather causes extreme trouble, seen Helford creek outside the Shipwrights empty and fill up again in twenty minutes, there's a surge comes over the bars below the Ferryboat, and another below Durgan. Take advice from the mooring people?
In 2019 when an easterly summer gale came in I was anchored the Helford River up past Groyne Point. We decided that it wasn't worth a dinghy journey ashore one day do to the waves. I don't know what it was like down by visitor moorings at the time.