Not great actually. We were assigned a mooring in the far outer harbor. #2-0. I believe these are simply positioned too far out because the first night was quite rocky as was the next day. On day 3, the side waves were hitting us such that our boat was pitching 90 degrees back and forth. As we arrived back to the boat late last night it was downright scary getting into the boat from our dinghy. I hit my head on the boom (a first) because it was as flailing so badly. We’ve had our boat nearly a decade and never experienced this bad of a situation at a mooring especially in non-inclement weather. Finally we decided at 9:30pm to leave the mooring and go inside the harbor where it was calm and nice and we tieD up to the harbor masters dock. Luckily it was open and available. I wouldn’t use those outer moorings ever again. That said, the town and bay of a Marblehead is marvelous.