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Tidal Station Locations and Ranges
MASSACHUSETTS, outer coast Mean Spring Mean Tide 
Range Range Level
Predictions Station Latitude Longitude (ft) (ft) (ft)
Merrimack River
Predictions Plum Island, Merrimack River Entrance 42° 49.0' 70° 49.2' 8.00 9.12 4.30
Predictions Newburyport 42° 48.7' 70° 51.9' 7.8 9.0 4.2
Predictions Salisbury Point 42° 50.3' 70° 54.5' 7.64 8.71 4.01
Predictions Merrimacport 42° 49.5' 70° 59.3' 7.05 8.04 3.70
Predictions Riverside 42° 45.8' 71° 04.6' 5.72 6.52 2.80
Predictions Plum Island Sound (south end) 42° 42.6' 70° 47.3' 8.6 9.9 4.6
Predictions Essex 42° 37.9' 70° 46.6' 9.18 10.47 4.90
Predictions Annisquam, Lobster Cove 42° 39.3' 70° 40.6' 8.81 10.04 4.74
Predictions Rockport 42° 39.5' 70° 36.9' 8.70 9.92 4.71
Predictions Gloucester Harbor 42° 36.6' 70° 39.6' 8.80 10.03 4.73
Predictions Salem, Salem Harbor 42° 31.4' 70° 52.6' 8.93 10.18 4.79
Predictions Lynn, Lynn Harbor 42° 27.5' 70° 56.6' 9.16 10.44 4.92
Boston Harbor Mean Spring Mean Tide
Range Range Level
Predictions Station Latitude Longitude (ft) (ft) (ft)
Predictions Boston Light 42° 19.7' 70° 53.5' 9.05 10.03 4.85
Predictions Deer Island (south end) 42° 20.7' 70° 57.5' 9.3 10.8 4.9
Predictions BOSTON 42° 21.3' 71° 03.1' 9.49 11.07 5.09
Predictions Charlestown, Charles River entrance 42° 22.5' 71° 03.0' 9.5 11.0 5.0
Predictions Amelia Earhart Dam, Mystic River 42° 23.7' 71° 04.6' 9.56 10.89 5.11
Predictions Chelsea St. Bridge, Chelsea River 42° 23.2' 71° 01.4' 9.6 11.1 5.1
Predictions Neponset, Neponset River 42° 17.1' 71° 02.4' 9.5 11.0 5.0
Predictions Moon Head 42° 18.5' 70° 59.3' 9.4 10.9 5.0
Hingham Bay Mean Spring Mean Tide
Range Range Level
Predictions Station Latitude Longitude (ft) (ft) (ft)
Predictions Nut Island, Quincy Bay 42° 16.8' 70° 57.3' 9.42 10.74 5.05
Predictions Weymouth Fore River Bridge 42° 14.7' 70° 58.1' 9.5 11.0 5.0
Predictions Crow Point, Hingham Harbor entrance 42° 15.7' 70° 53.6' 9.4 10.9 5.0
Predictions Hingham 42° 14.8' 70° 53.1' 9.5 11.0 5.0
Predictions Nantasket Beach, Weir River 42° 16.2' 70° 51.6' 9.4 10.9 5.0
Predictions Hull 42° 18.2' 70° 55.2' 9.3 10.8 5.0
Cohasset Harbor to Davis Bank Mean Spring Mean Tide
Range Range Level
Predictions Station Latitude Longitude (ft) (ft) (ft)
Predictions Cohasset Harbor (White Head) 42° 14.9' 70° 47.0' 8.8 10.2 4.7
Predictions Scituate, Scituate Harbor 42° 12.1' 70° 43.6' 8.94 10.19 4.83
Predictions Damons Point, North River 42° 09.6' 70° 44.0' 8.5 9.9 4.5
Predictions Brant Rock, Green Harbor River 42° 05.0' 70° 38.8' 9.08 10.35 4.89
Cape Cod Bay
Predictions Duxbury, Duxbury Harbor 42° 02.3' 70° 40.2' 9.89 11.27 5.30
Predictions Plymouth 41° 57.6' 70° 39.7' 9.76 11.13 5.22
Predictions Cape Cod Canal, east entrance 41° 46.3' 70° 30.4' 8.74 9.96 4.59
Predictions Cape Cod Canal, Sagamore 41° 46.5' 70° 32.1' 7.90 9.01 4.25
Predictions Cape Cod Canal, Bournedale 41° 46.2' 70° 33.7' 6.18 7.05 3.37
Predictions Cape Cod Canal, Bourne Bridge 41° 44.7' 70° 35.6' 4.29 4.89 2.42
Predictions Barnstable Harbor, Beach Point 41° 43.3' 70° 17.1' 9.5 11.0 5.0
Predictions Sesuit Harbor, East Dennis 41° 45.1' 70° 09.3' 9.73 11.09 5.14
Predictions Wellfleet 41° 55.8' 70° 02.5' 10.0 11.6 5.4
Predictions Provincetown 42° 3' 70° 11' 9.1 10.6 4.8
Cape Cod
Predictions Chatham, Stage Harbor 41° 40.0' 69° 58.0' 3.95 4.50 2.23
Predictions Chatham Harbor, Aunt Lydias Cove 41° 41.6' 69° 57.0' 4.63 5.27 2.43
Predictions Pleasant Bay 41° 44.2' 69° 58.9' 3.2 3.7 1.7
Predictions Georges Shoal, Texas Tower 41° 41.3' 67° 45.6' 4.2 4.8 2.2
Nantucket Sound, north side Mean Spring Mean Tide
Range Range Level
Predictions Station Latitude Longitude (ft) (ft) (ft)
Predictions Saquatucket Harbor 41° 40.1' 70° 03.4' 3.72 4.24 2.14
Predictions Wychmere Harbor 41° 39.9' 70° 03.9' 3.7 4.3 1.9
Predictions Dennisport 41° 39.5' 70° 06.9' 3.4 4.1 1.8
Predictions South Yarmouth, Bass River 41° 39.9' 70° 11.0' 2.8 3.4 1.5
Predictions Hyannis Port 41° 37.8' 70° 18.0' 3.1 3.7 1.6
Predictions Cotuit Highlands 41° 36.5' 70° 26.2' 2.5 3.0 1.3
Predictions Poponesset Island, Poponesset Bay 41° 35.2' 70° 27.8' 2.3 2.8 1.2
Predictions Falmouth Heights 41° 32.7' 70° 35.9' 1.3 1.6 0.6
Nantucket Island Mean Spring Mean Tide
Range Range Level
Predictions Station Latitude Longitude (ft) (ft) (ft)
Predictions Great Point 41° 23.2' 70° 02.8' 3.1 3.7 1.6
Predictions NANTUCKET 41° 17.1' 70° 05.8' 3.0 3.36 1.7
Predictions Eel Point 41° 17.5' 70° 12.5' 2.3 2.7 1.2
Predictions Muskeget Island, north side 41° 20.2' 70° 18.3' 2.0 2.4 1.1
Martha's Vineyard Mean Spring Mean Tide
Range Range Level
Predictions Station Latitude Longitude (ft) (ft) (ft)
Predictions Wasque Point, Chappaquiddick Island 41° 21.8' 70° 27.0' 1.1 1.4 0.6
Predictions Squibnocket Point 41° 18.7' 70° 46.1' 2.9 3.7 1.6
Predictions Nomans Land 41° 15.7' 70° 49.0' 3.0 3.6 1.6
Predictions Gay Head 41° 21.2' 70° 49.8' 2.9 3.5 1.5
Predictions Cedar Tree Neck 41° 26.1' 70° 41.8' 2.2 2.8 1.2
Predictions Oak Bluffs 41° 27.5' 70° 33.3' 1.7 2.0 0.9
Predictions Edgartown 41° 23.3' 70° 30.7' 1.9 2.3 1.0
Vineyard Sound Mean Spring Mean Tide
Range Range Level
Predictions Station Latitude Longitude (ft) (ft) (ft)
Woods Hole
Predictions Little Harbor 41° 31.2' 70° 39.9' 1.4 1.8 0.8
Predictions OCEANOGRAPHIC INSTITUTION 41° 31.4' 70° 40.3' 1.8 2.33 1.0
Predictions Uncatena Island (south side) 41° 30.9' 70° 42.2' 3.6 4.5 1.9
Predictions Quicks Hole, North side 41° 26.9' 70° 51.4' 3.5 4.4 1.8
Predictions Cuttyhunk 41° 25.5' 70° 55.0' 3.37 4.25 1.81
Buzzards Bay Mean Spring Mean Tide
Range Range Level
Predictions Station Latitude Longitude (ft) (ft) (ft)
Predictions Penikese Island 41° 27.0' 70° 55.3' 3.4 4.2 1.8
Predictions Chappaquoit Point, West Falmouth Harbor 41° 36.3' 70° 39.1' 3.82 4.70 2.07
Predictions Monument Beach 41° 42.9' 70° 37.0' 3.97 5.00 2.17
Predictions Gray Gables 41° 44.1' 70° 37.4' 3.62 4.45 1.98
Predictions Cape Cod Canal, RR. bridge 41° 44.5' 70° 37.0' 3.43 4.22 1.93
Predictions Onset Beach, Onset Bay 41° 44.5' 70° 39.5' 3.50 4.41 1.97
Predictions Great Hill 41° 42.7' 70° 42.9' 3.96 4.99 2.15
Predictions Marion, Sippican Harbor 41° 43.2' 70° 45.6' 4.0 4.9 2.2
Predictions Piney Point 41° 41.7' 70° 43.2' 3.91 4.81 2.13
Predictions Mattapoisett, Mattapoisett Harbor 41° 39' 70° 49' 3.9 4.8 2.1
Predictions Clarks Point 41° 35.6' 70° 54.0' 3.56 4.49 1.93
Predictions New Bedford 41° 38.4' 70° 55.1' 3.7 4.6 1.9
Predictions Round Hill Point 41° 32.3' 70° 55.7' 3.43 4.32 1.85
Westport River
Predictions Westport Harbor 41° 31' 71° 5' 3.0 3.7 1.6
Predictions Hix Bridge, East Branch 41° 34.2' 71° 04.4' 2.7 3.4 1.4
RHODE ISLAND, and MASSACHUSETTS
Narragansett Bay
Mean Spring Mean Tide
Range Range Level
Predictions Station Latitude Longitude (ft) (ft) (ft)
Sakonnet River
Predictions Sakonnet 41° 27.9' 71° 11.6' 3.17 3.99 1.70
Predictions Sachuest, Flint Point 41° 29.2' 71° 14.3' 3.13 3.94 1.69
Predictions The Glen 41° 33.5' 71° 14.2' 3.40 4.28 1.84
Predictions Nannaquaket Neck 41° 37.1' 71° 12.2' 3.50 4.41 1.91
Predictions Anthony Point 41° 38.3' 71° 12.7' 3.75 4.73 2.05
Predictions North End, Bay Oil pier 41° 39.1' 71° 12.6' 4.17 5.25 2.24
Predictions Castle Hill 41° 27.8' 71° 21.7' 3.25 4.10 1.77
Predictions NEWPORT 41° 30.3' 71° 19.6' 3.47 4.38 1.87
Conanicut Island
Predictions Beavertail Point 41° 27.1' 71° 24.1' 3.34 4.21 1.86
Predictions West Jamestown, Dutch Island Harbor 41° 29.8' 71° 23.2' 3.46 4.36 1.87
Predictions Conanicut Point 41° 34.4' 71° 22.3' 3.8 4.7 2.0
Predictions Prudence Island, (south end) 41° 34.8' 71° 19.3' 3.74 4.71 2.03
Predictions Bristol Ferry 41° 38.2' 71° 15.3' 4.08 5.14 2.20
Predictions Bristol, Bristol Harbor 41° 40.1' 71° 16.7' 4.1 5.1 2.2
Predictions Bristol Highlands 41° 41.8' 71° 17.6' 4.2 5.2 2.2
Predictions Fall River, Massachusetts 41° 42.3' 71° 09.8' 4.36 5.41 2.35
Predictions Steep Brook, Taunton River 41° 44.4' 71° 07.9' 4.51 5.68 2.44
Predictions Bay Spring, Bullock Cove 41° 45.1' 71° 21.1' 4.25 5.23 2.30
Predictions Pawtuxet, Pawtuxet Cove 41° 45.7' 71° 23.3' 4.35 5.35 2.35
Predictions Providence, State Pier no.1 41° 48.4' 71° 24.1' 4.41 5.63 2.40
Predictions Rumford, Seekonk River 41° 50.4' 71° 22.4' 4.66 5.73 2.51
Predictions Pawtucket, Seekonk River 41° 52.1' 71° 22.8' 4.6 5.8 2.5
Predictions East Greenwich 41° 39.9' 71° 26.7' 4.0 5.0 2.1
Predictions Wickford 41° 34.3' 71° 26.7' 3.71 4.56 2.01
Predictions Watson Pier, Boston Neck 41° 27.6' 71° 25.7' 3.32 4.18 1.79
Predictions Narragansett Pier 41° 25.3' 71° 27.3' 3.2 4.0 1.7
RHODE ISLAND, Outer Coast Mean Spring Mean Tide
Range Range Level
Predictions Station Latitude Longitude (ft) (ft) (ft)
Predictions Point Judith, Harbor of Refuge 41° 21.8' 71° 29.4' 3.00 3.13 1.63
Predictions Block Island (Old Harbor) 41° 10.4' 71° 33.4' 2.85 3.51 1.54
Predictions Southwest Point, Block Island 41° 09.8' 71° 36.6' 2.60 3.20 1.41
Predictions Weekapaug Point, Block Island Sound 41° 19.7' 71° 45.7' 2.53 3.11 1.39
Predictions Watch Hill Point 41° 18.3' 71° 51.6' 2.6 3.2 1.4
Predictions Westerly, Pawcatuck River 41° 22.9' 71° 49.9' 2.6 3.1 1.5
Revised: 3 November 2008