What the app shows you
Full FogCast score, fog type, chase-or-skip verdict, and 10-day outlook — all in the app.
Get LightCast Suite on iOS
Know before you drive: FogCast checks the conditions that produce photogenic fog
Get more than a snapshot of current conditions. The LightCast app unlocks everything to plan ahead
Humidity alone isn't enough. Wind alone isn't enough. Cloud cover alone isn't enough. Photogenic valley fog requires several conditions to line up at once, and most weather apps don't read them together.
Set a FogCast threshold once. The app will alert you when conditions at your saved locations look promising, so you're not manually checking at 4am.
Don't waste a sunrise drive. Check FogCast before you leave.
Download on the App StoreMendocino perches on a headland above the Pacific in Mendocino County, a stretch of coast that is routinely foggier than even San Francisco. The town's Victorian architecture, water towers, and church steeples against the sea cliffs and fog has made it one of the most-photographed small towns in California. The fog here is thick, low, and persistent — sometimes lasting all day in summer — and it transforms the headlands and cove into a softly luminous landscape that rewards patience.
Mendocino Headlands State Park is the primary photography area, with trails along the cliff edge above crashing surf that frequently disappears into fog. The Portuguese Beach and Big River Beach accesses at either end of the headlands give low tide foregrounds. The iconic water tower silhouettes against fog layers are best shot from the south bluff near the historic Presbyterian church. June through September is the most reliable fog period; July and August can see fog every single morning before a partial afternoon clearing that returns to fog by evening.
Mendocino fog is driven by the same marine layer mechanism as the broader California coast, but amplified by the cape's exposure and the lack of bay protection. The headland extends into the ocean with no barriers, meaning fog rolls straight across it. When offshore sea surface temperatures are below 12°C and inland temperatures rise above 28°C, the marine layer is pulled hard onshore and fog will be dense by 4am.