I work in Aldershot, about 1 mile from the ground. For the last 3 hours it has been raining heavily. Though there is probably very little risk of it affecting the game going ahead, I do suggest you check the weather forecast for tomorrow and bring a raincoat.
For those who haven't been before, the ground is a short walk from the station, which is on the Waterloo to Farnham/Alton line. If coming by car there are many car parks in the centre, with probably the best being a multi storey just past the ground.