Nercoos has a fine online tool to check ocean water temperatures(all over). We're running below normal with a big drop in ocean temperatures last winter and early spring. Below the surface layer, is enough cooler that the Maine lobster harvest is forecast to be about a week behind normal.

That's important because if it comes too early(as it did in 2012), harvest beats the seasonal demand-over supply- and prices can crash.

But I notice if you click Massachusetts Bay, Gulf of Maine, Penobscot Bay, the temperatures -at the surface- rocketed up in the last few warm days.

Makes me think that incidence of fog won't be much affected by the lower ocean temperatures down 20-50 meters. Those below surface areas will stay cooler, longer. Those lower water temperatures below 20-50 meters, are what encourages lobsters to move into shallower water where the harvest(buoys!), takes place.

http://www.neracoos.org/datatools/climatologies_display#buoy=F01&cf=dc&dt=water_temperature-1&year=2015