Typical September highs at Kilkenny Beach reach about 70°F. Kilkenny Beach is located in Northwest Marin, California.
Northwest Marin, California · live parking & conditions · updated June 19, 2026
In a typical year September is the warmest month here, with highs near 70°F. Tap Kilkenny Beach on the map for live surf, wind, water temperature, UV and tide times.
Open Kilkenny Beach on the map →