The watery sphere spell description says:
On a successful save, a creature is ejected from that space to the nearest unoccupied space of the creature’s choice outside the sphere. A Huge or larger creature succeeds on the saving throw automatically, [...]
Every time a Huge creature would attempt to go through the sphere - it will automatically make a successful save against the effect, and so will be moved back in unoccupied square?
Imagine a straight corridor 15 feet wide, and a Huge creature tried to go through it, but the path is blocked by watery sphere. Does this mean that a Huge creature cannot go through watery sphere at all?