Typical September highs at Long Cove Beach reach about 67°F. Long Cove 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 67°F. Tap Long Cove Beach on the map for live surf, wind, water temperature, UV and tide times.
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