The spring tides for this period are not due until the following weekend. For the 25/06-27/06, the tides forecast (for Southend) are all 4.9m & 5.0m which are fairly low for the area, esp compared to the 5.9m forecast for the 4/07-6/07.

There are a couple of Caravan Club CL sites in the area, I may try to book on one of those if there's a problem with camping down near the station.