“Champagne sailing” is not the norm on San Francisco Bay. It is highly unusual to have a run of light weather in September, or to even have a run of days with the same weather. But sailors saw more of the same during the third day of racing at the 2023 Rolex Big Boat Series: a low marine layer with light and variable winds from the west-southwest. “Champagne sailing” is not the norm on San Francisco Bay. It is highly unusual to have a run of light weather in September, or to even have a run of days with the same weather. But sailors saw more of the same during the third day of racing at the 2023 Rolex Big Boat Series: a low marine layer with light and variable winds from the west-southwest.