Depending on the weather, the park hours/attendance can vary greatly. This week, the weather is in the 80s so Typhoon Lagoon has likely seen the most attendance since November. But even on a very warm winter day, with one park closed, you might only see about a third of the parks capacity.
When the weather drops below 60s, I heard the park usually closes due to lack of attendance. A few times this winter I heard from cast members that there were only a few families in the parks on a given day. If the attendance is fair, the hours are 10am - 5pm.
Even on a 95 degree day during Thanksgiving week, my family and I pretty much had Blizzard Beach to ourselves. Typhoon Lagoon is a lot smaller, but I’m sure it will be mostly empty until spring break.
Hope this helps! I LOVE TL! I worked at the water parks last summer and I cannot wait until photopass goes back there at the end of march!