I hope you have a good time, but reckon on about 0.9 metres at chart datum in the area between Pye End and No 2 buoy. This normally means that it's best to be somewhere between Clacton & Walton at low water, though with your draft it's hardly going to matter except at springs. Just be aware that the bottom inside Pye End is very hard sand and well worth avoiding. At most tides we cut across from the Naze to the No 2 red, missing Pye end, with 1.5 m draft.