Please Sir! Please Sir!
I can answer this one!
My almanac shows 2 October as neap tides. Ventnor’s standard port is Portsmouth where low tide (2.1m) is at 10.50 GMT (11.50 BST). At 11.00 MLWN at Ventnor is -0030 and -0.2m. It therefore seems that you’ve got LW at Ventnor of 1.9m at 11.20 BST.
I don’t know the drying height in the harbour but assuming -1m and allowing a draught of 1m for your boat, it’s going to be touch and go (possibly touch and stay!) whether you’ll get in at lunch time unless you have a late lunch (the Spyglass does food all day). Times are 1h 38 mins later on 3 October with similar depths.
The tidal stream around St Catherines changes from Easterly to Westerly around 5½ hours after HW Portsmouth which is at 05.07 GMT on 2 Oct. Assuming a prevailing South Westerly wind, you should have wind with tide from around 11.30 BST for around six hours.