If you get a face mask with fabric over the top of your nose, it should help direct your moist breath down instead of up. I wear ski goggles when the temperature gets low enough to freeze icicles on my eye lashes or when it is snowing hard such that it would hurt the eyes. And those are times that I'll have the face mask on so I don't know about fog on the goggles without it.

And since it is dark so much of the winter commuting, the lenses on my goggles are tinted so that vision is very good in the dark. They were a little pricey, but well worth the alternatives, IMO.