Steve DeMars took me out for the first time sturgeon fishing on the St Croix at 2 pm on a Friday afternoon. We fished until 4:30 and boated 31 fish.
They bite during the day, but I think you’ll find the tuna boat traffic hard to deal with. That and normally the wind dies in the evening so there’s another problem that won’t effect your fishing.
If a person can only get out during the day or doesn’t feel comfortable with night fishing…do it during the day. The best time to go is when you can…as they say.
Hope that helps.
PS there’s getting to be more and more folks night fishing on LOTW’s as well to avoid the crowds.
Do Lake sturgeon have any nocturnal feeding instincts? Similar to Flatheads?