Continuous rain on Friday turned car parks into quagmires and left many spectators stranded in lengthy traffic jams outside the track.
That led Silverstone chiefs to advise up to 30,000 fans with public car park passes for Saturday's action to stay away from the circuit, which has been hit by further rain following a dry start to the day.
Ecclestone, who was himself advised not to travel to the track on Friday, has been one of Silverstone's harshest critics, but he admitted there was little that could be done in the circumstances.
He told Sky Sports F1: "I'm not a big supporter of Silverstone, but in all fairness they've done a good job and the rain is not their fault.
"England has been flooded; people's houses have been flooded and they've been left stranded in the streets. So it is no different here than anywhere else."
He added: "If the weather was suitable for the car parks then things would be perfect. But because of the rain things are not dangerous but if you got in there you might not get out.
"It is difficult for them to do what they could have done, which was to cover all the car parks."