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 StoreOlympic National Park spans three distinct ecosystems: temperate rainforest, alpine terrain, and rugged Pacific coastline. All three produce fog, and each has a different character. The Hoh Rain Forest sees persistent low cloud and mist year-round, the coastal strip from Ruby Beach to Rialto Beach catches ocean fog rolling in over sea stacks and driftwood, and the alpine zone at Hurricane Ridge sits above and below cloud on most mornings.
Ruby Beach is the most photographed coastal fog location, with sea stacks, tide pools, and scattered driftwood creating a complex foreground as marine layer moves in from the Pacific. The Hoh Rain Forest trail through old-growth Sitka spruce and maple is particularly atmospheric in fog, with hanging moss and filtered light through the mist. Hurricane Ridge offers above-cloud views when conditions are right.
The Olympic Peninsula is one of the wettest places in the continental US, and fog is possible year-round. Summer marine layer is most reliable on the coast. Fall and winter produce more persistent valley fog inland. The rainforest is atmospheric in any season when mist is present.