If you would rather gather local knowledge of the tide timetables, the Coastguard in your area will be able to advise you, and the local paper should also print daily tide timetables.

UK Hydrographic Office
Tide predictions for ports around the globe for the current day and upto 6 consecutive days in advance. For tidal predictions over and above 6 days into the future or for lunar phases, sunrise and sunset times or spring and neaps data you need to register and then there is a small charge.

http://www.pol.ac.uk
The Proudman Oceanographic Laboratory have a "National Tidal and Sea Level Facility" available for the current day and upto 6 days in advance with measurements at high and low tide each day and the times of their occurrence. Select a point on the map to display the predicted details.