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 StoreGeirangerfjord is a UNESCO World Heritage Site in western Norway — a 15-kilometer arm of the Sunnylvsfjorden carved 260 meters deep between walls of nearly vertical rock rising 1,400 meters above the water. Waterfalls including the Seven Sisters and the Suitor cascade directly from the cliff tops into the fjord, and when fog fills the fjord at dawn, those waterfalls emerge from clouds, the cruise ships at anchor appear as ghostly shapes through the mist, and the entire geography of the fjord becomes abstract and cinematic.
The Ørnesvingen Eagle Road viewpoint above Geiranger is the most photographed single location — looking down into the fog-filled fjord hairpins with the village and cruise ships below. Dalsnibba at 1,476 meters gives the highest viewpoint over the fjord fog, with the fjord arms visible far below in clear conditions or completely hidden on total fog-in mornings. The Seven Sisters waterfall viewpoint across the fjord is best reached by boat, and fog adds the most drama here. May through September is the accessible season, with June and early July producing the most reliable morning fjord fog before the tourist peak of midsummer.
Geirangerfjord fog forms when cold overnight air drains from the surrounding plateau and mountains into the enclosed fjord, cooling the moist fjord air below the dew point. The fjord's enclosed shape and extreme depth make it an outstanding cold-air trap. After a warm, clear day with light winds, the fjord temperature inversion can be dramatic — the fjord surface fog at 26 meters elevation while the Eagle Road viewpoint at 620 meters is completely clear. Check Geiranger village weather and compare to the plateau above for inversion strength.