The problem is long range predictions do not take wind into account. If you need accurate predictions the best source I have found is the National Weather Service for your area.

The data is normally provided in text form so any internet phone will work. Or if you have a digital cell phone and a pocket PC you can have the Pocket PC dial in using the cell phone as a modem. If you make the tide information a Mobile Favorite the Pocket PC will sync the data. It takes about a minute of cell time.

I find I need information at this level about once or twice a year. The rest of the time the data from my last sync is good enough.

Be warned though. About half the places I sail do not have digital phone.