So it looks like when the current is running south in the East River and Hudson, it is rand west running north on the Harlem from Hells Gate. I have to figure Port Washington to Hells Gate, Hells Gate to the Hudson (Harlem River), then to north of the Tappan Zee for and anchorage.
I do not have an Eldridge book handy so this is from memory.....
- The small 'book' has three sections that will help your plans
- Two of them have both a chart of days/times as well as maps
- Those two are for the LI sound and for the NY area (Harlem river etc)
- Each of those has a map for every hour of the tide , all 12 of the
- Each map shows the currents direction and speed at various spots along the path
- You look up the day/time in the charts and refer to the map(s)
- The third section is charts only of the Hudson river with points along the way that reference both tidal times and speeds of current along the path
If I remember correctly we would leave Northport fighting a slight tide so that we could maximize the tides the balance of the journey - you will always hit some head tides with this cruising route the idea is to minimize the negative tides and maximize the following tides.
We often left Northport around 5:30 Am at first light and arrived and tied up at Kingston about noon - we cruised at about 16-17 knots mostly.
As your routes distance and boat speed vary from ours your best time to make the cruise will likely vary as well - we a bit before full low tide in Northport.
Please remember that the Hudson runs down longer and harder than it runs up so the 6 hour tidal swing is not 6 hours on the Hudson.
Please also note that the tides in Pt Washington /Northport /etc can easily swing 9' or more so if you are not used to these swings consider that with anchoring or with fixed docks.