How late can you rent a water mouse at the Poly?

[GEM]

We're going in early September and we want to rent a water mouse one afternoon before our early dinner reservation at Ohana. Our ADR is for 5:30pm. What time will we need to be at the marina to do a boat rental? Does anyone know when the last rental is that time of year? Thanks!

 

[DisneyNotes]

We're going in early September and we want to rent a water mouse one afternoon before our early dinner reservation at Ohana. Our ADR is for 5:30pm. What time will we need to be at the marina to do a boat rental? Does anyone know when the last rental is that time of year? Thanks!

Haven't rented at the Poly, but have at the GF. They told us that dark was the time to have the boats back in. That was in November, so 4:30 was as late as we could rent for an hour. I think you'll be fine with your time frame for September.