Approximate Tidal Differences
(Based on Old Saybrook)

at Stonington   less 1 hour, 43 minutes
at Noank   less 1 hour, 33 minutes
at Norwich   less 1 hour, 25 minutes
at  New London   less 1 hour, 11 minutes
at Millstone Pt.   less 1 hour, 2 minutes
at Duck Island   plus 7 minutes
at Madison   plus 12 minutes
at Falkner Island   plus 19 minutes
At Branford Harbor   plus 24 minutes
at New Haven Harbor   plus 25 minutes
at Milford Harbor   plus 26 minutes
at Bridgeport   plus 33 minutes
at Cos Cob Harbor   plus 38 minutes
at South Norwalk   plus 45 minutes
Connecticut River
at Essex   plus 28 minutes
at East Haddam   plus 1 hour, 31 minutes
at Portland   plus 2 hours, 40 minutes
at Hartford   plus 4 hours, 19 minutes
New London and Fisher's Island Sound tides occur before Old Saybrook.  Bridgeport and Greenwich tides occur after Old Saybrook.

Tide Tables: Old Saybrook