Due to the “Super Moon” very high tides this week and highest of the year, I think!!,
Monday 21st at 07-07 hrs 7.7 metres
Tuesday 22nd at 07-49 hrs 7.49 metres
Wednesday 23rd at 08-31 hrs 7.3 metres
Worth a look if you can get up that early. 
Times and heights are for Milford Haven