Port Jefferson — NY, United States

Tide times & tide chart

1.3 ft12:13am5.7 ft6:21am1.6 ft12:30pm6.0 ft6:39pmNow
Tide predictions for Port Jefferson, computed from harmonic constituents. High 6.0 feet on Mon 19 Oct 2026 at 18:40, low 1.3 feet on Mon 19 Oct 2026 at 00:10, above MLLW, the chart datum.
↑7:08am↓6:05pm

Predictions are not observations — conditions vary with weather and river flow. Not for navigation.

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Tide times for the next 7 days

Mon 19 Oct 2026 through Sun 25 Oct 2026. All times are local to Port Jefferson (America/New_York). Heights are in feet above MLLW.
DayTideTimeHeight
Mon 19 Oct 2026Low1.3 ft
Mon 19 Oct 2026High5.7 ft
Mon 19 Oct 2026Low1.6 ft
Mon 19 Oct 2026High6.0 ft
Tue 20 Oct 2026Low1.2 ft
Tue 20 Oct 2026High5.9 ft
Tue 20 Oct 2026Low1.4 ft
Tue 20 Oct 2026High6.1 ft
Wed 21 Oct 2026Low1.0 ft
Wed 21 Oct 2026High6.2 ft
Wed 21 Oct 2026Low1.1 ft
Wed 21 Oct 2026High6.3 ft
Thu 22 Oct 2026Low0.8 ft
Thu 22 Oct 2026High6.6 ft
Thu 22 Oct 2026Low0.7 ft
Thu 22 Oct 2026High6.5 ft
Fri 23 Oct 2026Low0.6 ft
Fri 23 Oct 2026High7.0 ft
Fri 23 Oct 2026Low0.3 ft
Fri 23 Oct 2026High6.7 ft
Sat 24 Oct 2026Low0.4 ft
Sat 24 Oct 2026High7.4 ft
Sat 24 Oct 2026Low-0.1 ft
Sat 24 Oct 2026High6.9 ft
Sun 25 Oct 2026Low0.2 ft
Sun 25 Oct 2026High7.7 ft
Sun 25 Oct 2026Low-0.3 ft
Sun 25 Oct 2026High7.0 ft

Station facts

Position
40.9500° N, 73.0767° W
Time zone
America/New_York
Datum
MLLW datum · computed from harmonic constituents
Source
Harmonic constituents from US National Oceanic and Atmospheric Administration
Region
NY, United States

Heights are measured above chart datum. A negative height means there is that much less water than the charted depth shows.

Slackwater database (https://github.com/openwatersio/slackwater-database)

How we check predictions — dated samples and their limits.

Nearby

All tide stations