Yes, 10:00 AM to 5:00 Pm.
Nor for all of it; only partly
Partly yes: https://www.google.dk/amp/www.wdwmagic.com/amp/attractions/typhoon-lagoon/news/23jun2017-typhoon-lagoon-annual-refurbishment-dates-for-2018.htm
Thanks! Your answer is awaiting moderation.