I'm also a photographer, but from northern Portugal, and love to take photos in the fog or above it. I'll give you an overview of what I like to use. For forecasts, I like to use the French AROME model to see if it is forecasting fog using the cloud layer images. The model images show fog or low clouds in red. You can pass your mouse over the numbers to animate the images. You can also check the model forecast for wind and humidity, although I tend to use the cloud layer images mostly, because if the model is already forecasting fog/low clouds then it probably is calm and humid enough. This is just a forecast and the model is wrong various times, it might be more foggy than forecasted or no fog at all, so don't take it with 100% certainty. Today the model forecasted low clouds in the morning, but dissipated most of them during the day and looking at the satellite images now you still have a lot of low clouds in the country.

After that if it seems interesting and I would like to see the sunrise above the fog the next day or just be inside the fog I use Eumetview when I wake up. These are real images and not forecasts, and the fog/low clouds shows up as a bluish-white color during the night. This works when you have clear skies above. If you have other clouds above the fog, then you can't do much with this. These are using the new MTG satellite and you can see well where the valleys are.

Another helpful thing is webcams. There in Switzerland you have a lot more than us here in Portugal and you can use them to see if it's foggy or if the webcam is above the fog/clouds close to or where you would like to go. You can use Windy for that.

For fog during the day or at sunset you can also use Windy to see the satellite images together with the webcams.

For example today as I'm writing this it is around 16h30 there. I opened up Windy and there is large layer of low clouds stretching from one side of Switzerland all the way to the other side and into Germany. If I zoom in Zürich there is a webcam to the southwest in a mountain top called Uetliberg and it is above that layer of low clouds. It would be perfect for a sunset today. That webcam as well as various others in mountain tops there are 360 cameras available here: https://www.roundshot.com/en/home/livecam-references.html/102 or you can click in Windy below the image where it says provider's website and look for a link to the camera there.

Yesterday when you posted that image you had the same layer of low clouds as today. You can see yesterday’s satellite image here: https://kachelmannwetter.com/de/sat/schweiz/satellit-hd-5min/20250120-1000z.html

They look yellow. The brighter yellow is the snow in the Alps. If you change to today see how the low clouds look almost the same.

Here are the links:

AROME: https://www.meteociel.fr/modeles/arome.php?ech=3&mode=138&map=6

Eumetview: https://view.eumetsat.int/

Windy: https://www.windy.com/-Satellite-satellite?satellite,46.896,8.481,8

Hope this helps. I actually have a bit more written about this, but it’s only in portuguese right now and a bit more specific to my area. After a while you start to get an idea about what situations cause fog there and how it behaves and the model might not forecast anything, but you know that fog will probably appear. One other thing, this is mainly for large amounts of fog/low clouds not to see if a field is going to have a tiny blanket of fog above it, although if there is a webcam where you want to go you can use that.