What the app shows you
Full FogCast score, fog type, chase-or-skip verdict, and 10-day outlook — all in the app.
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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 StoreRialto Beach in the Mora unit of Olympic National Park is a long, wild Pacific-facing beach north of La Push, accessible by road and stretching into undeveloped wilderness coastline. The beach is famous among photographers for its enormous driftwood piles — some logs the size of houses, bleached white and stacked by winter storms — combined with offshore sea stacks and almost constant Pacific fog and mist. It is one of the rawest, most photogenic coastlines in the lower 48 states.
The driftwood field at the beach access point is itself the primary photography subject when fog sits at ground level and wraps around the massive bleached logs. Hole-in-the-Wall, a rock arch about 1.5 kilometers north along the beach, is the most iconic destination — a natural arch in the sea stack that fog streams through at high tide. The arch is accessible at low tide and is dramatically different in fog than in clear conditions. June through September is the peak marine fog season, though the beach is spectacular in winter storm light as well.
Rialto Beach fog is pure Pacific marine layer with nothing between the beach and the open ocean. The fog arrives from the west and northwest, usually thickest from midnight through 10am before the sea breeze picks up and begins clearing from the water. Checking the Quillayute airport weather station just inland gives the best local fog indicator — if visibility there is holding above 1,500 meters while the coast is fogged in, conditions are likely to be dynamic and photogenic rather than a uniform gray wall.