FogCast · Glen Coe, GB
Fog Forecast for Glen Coe
Know before you drive: FogCast checks the conditions that produce photogenic fog
Reading current conditions…
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The full FogCast forecast is in the app.
Get more than a snapshot of current conditions. The LightCast app unlocks everything to plan ahead
- 📈 Full FogCast score (0–100)
- 📅 7-day fog outlook
- 🌅 Best photography windows
- 🔔 Push alerts when conditions improve
- ⭐ Save favorite locations
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Why fog is hard to predict
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.
Dew Point Depression
When air temperature and dew point converge below 2°C, the air is near saturation. This is the single strongest fog predictor and the first thing FogCast checks.
Wind Speed
Fog needs calm air. Below 5 km/h is ideal. Above 15 km/h, fog disperses before it can pool in the valley. A standard weather app won't flag this combination.
Overnight Sky Clarity
Clear overnight skies let the ground cool rapidly, pushing surface temperatures toward the dew point. Counterintuitively, clouds overnight suppress radiation fog.
Temperature Trend
FogCast reads the overnight temperature arc. If temps are converging toward the dew point hour by hour, fog probability increases significantly by pre-dawn.
Check today's FogCast
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
Get notified instead of checking every morning
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.
⏰
Wake up only when conditions look promising
🚗
Avoid wasted drives when fog never forms
⭐
Save your favorite photography locations
🌫️
Never miss a rare dense fog event
Fog photography at Glen Coe
Glen Coe is a deep glacial valley in the Scottish Highlands, flanked by some of the most dramatic ridgelines and buttresses in Scotland — the Three Sisters, Aonach Eagach, and the Buachaille Etive Mòr standing sentinel at the eastern entrance. Atlantic weather systems push moisture-laden air over the Rannoch Moor and into the glen, where orographic uplift and cold drainage produce fog, low cloud, and mist with remarkable frequency. On the right morning, the glen fills to the ridge level with cloud and the summits emerge as dark islands above the white.
The viewpoint above Loch Achtriochtan on the valley floor, and the higher road sections on the A82 approaching from Rannoch Moor, are the classic fog photography positions. The Buachaille Etive Mòr seen from the Rannoch Moor edge with low cloud in the glen below is one of the defining images of Scottish Highland photography. Autumn and early winter, from September through January, are the most reliable seasons. Winter snow on the ridges combined with fog in the glen produces the most dramatic conditions.
Glen Coe fog is almost entirely orographic and advection-driven — calm, clear nights are less predictive here than at inland locations. The most reliable fog conditions follow the passage of a frontal system when residual moisture sits in the valley under a stable air mass. Watch for a partially clearing sky after rain, with winds dropping to near-calm and visibility remaining low in the glen.
Other fog photography locations
Frequently asked
Can I check FogCast on the website?
This page shows a preview of current conditions, including humidity, wind, temperature, and dew point. The full FogCast score, 7-day outlook, push notifications, and best shooting windows are available exclusively in the LightCast app for iOS.
Is FogCast free?
The current conditions preview on this page is free, no account needed. The full FogCast tool is in the LightCast Suite iOS app, which includes a 7-day free trial. After the trial it's $2.99/month, cancel anytime in the App Store.
Why use FogCast instead of checking humidity?
Humidity alone doesn't tell you whether photogenic fog is likely. High humidity with strong wind produces no fog at all. FogCast combines dew point depression, wind speed, overnight sky clarity, temperature trend, and visibility into a single score built specifically for fog photography planning.
What is FogCast's scoring scale?
FogCast scores fog conditions from 0 to 100. A score of 75 or above indicates dense fog is expected. 55 to 74 means fog is likely and worth chasing. 35 to 54 suggests patchy mist is possible. Below 35, conditions are unlikely to produce photogenic fog. The full score is available in the LightCast app.
