They’ll be hoping that they can make use of the gradually rising high tides that happen over the next few days . . . although the tidal range there isn’t huge, every little bit will help. From Wednesday onwards the tides get progressively smaller, which will make the refloat progressively harder.
An alternative viewpoint . . . bigger tides over the next few days will mean that at low water more of the ship’s weight will be bearing on the grounded bow and stern sections (leaving the midships “hanging”) . . . increasing the possibility that the hull could break its back.