FogCast · Sleeping Bear Dunes, MI

Fog Forecast for Sleeping Bear Dunes

Know before you drive: FogCast checks the conditions that produce photogenic fog

Reading current conditions…
Current Conditions
Fog Potential:
Humidity
Wind
Temp
Dew Point Gap

FogCast heatmap — LightCast Suite
LightCast
iOS App LightCast Suite
🌅 GoldCast — golden hour score & cloud forecast
🌌 StarCast — night sky & Milky Way visibility
🚁 DroneCast — wind & flight readiness
🌫️ FogCast — fog & mist forecasting
☁️ CloudCast — cloud cover & dramatic sky timing
🗺️ Heatmap — conditions across the region
Price $2.99 / mo
Free Trial 7 days
Outlook 7-day

Sleeping Bear Dunes National Lakeshore sits on the eastern shore of Lake Michigan, and the thermal contrast between the cold lake water and warmer land produces sea fog and advection mist that rolls in from the lake in spring and early summer. The massive sand dunes rise 130 meters above the lake and when lake fog moves inland it wraps around the dune slopes and pools in the forested lowlands behind them.

The Dune Climb and the Pierce Stocking Scenic Drive overlooks offer the most dramatic views of fog over the lake, with the dunes in the foreground and the Manitou Islands visible or disappearing into the mist offshore. Glen Haven and Empire Beach give low-angle waterline compositions as fog rolls in off the lake. The Glen Lake area behind the dunes sees radiation fog on calm fall mornings that is separate from the lake fog.

Spring and early summer are the best lake fog seasons, from May through July, when lake water is still cold from winter. Fall brings radiation fog to Glen Lake and the forested inland areas. The combination of dunes, lake, and fog is one of the more distinctive photography subjects in the Great Lakes region.



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

FogCast score and forecast in LightCast app FogCast score and forecast in LightCast app

Set a threshold and get a notifications when fog will form. Never check manually again.
Get LightCast Suite on iOS

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.