“You can’t cross the sea merely by standing and staring at the water.” –Rabindranath Tagore
And you can’t answer a hypothetical question for certain, at least in science, without doing the experiment for yourself. Here on Earth, liquid water is plentiful; our planet has the stable temperatures and pressures that water needs to exist in its liquid state.
But what happens if you take that water to space? In the vacuum of space, the temperatures are much too low for liquid water; everything should freeze. But the pressures are much to low for liquid water as well; everything should boil!