The tide, drawn as a curve
Most tide pages hand you four times in a box. The useful question is usually not when high water is, but how long the water keeps falling, and how far. So this site draws the curve first, from NOAA's own predicted high and low waters, and names the station, the datum and the fetch time next to it.
Read that figure left to right and the week has a shape: the range at Portland grows from 5.3 ft between one extreme and the next to 8.78 ft later in the week, when the highest water in the window reaches 9.376 ft at 9:47 p.m. on Friday, October 23. Nothing on this page had to be estimated to tell you that. Open the Portland page for the table, or pick another station below.
What each station page gives you
A named station, not a region
Every page shows the NOAA station ID, its coordinates, whether it is a reference or subordinate station, and which reference station a subordinate one is derived from.
The datum, stated once and used everywhere
Heights are feet above mean lower low water. A low water of 0.5 ft is a surface height above chart datum, not the depth under your boat, and the pages say so.
Time zone handling you can check
Predictions are requested with
time_zone=lst_ldt, so NOAA applies daylight saving itself and the times you read are clock times at the station. No second conversion happens anywhere in the build.A table built to be printed
The seven-day table prints without the navigation, and the printable tool takes any station and date range and gives you the same table or a CSV file.
The limits, in the same type size as the data
These are astronomical predictions. Wind, air pressure and runoff are not in them. No page here rates fishing, swimming or safe passage, because predicted tide heights cannot support those claims.
Stations with the biggest tides on the list
Mean range is the average height difference between one extreme and the next across the stored week, computed from NOAA's own values. The spread below is real: the Gulf of Maine funnels toward the Bay of Fundy, and the open south-facing coast does not.
| Station | State | Mean range, ft | Highest water, ft | Lowest water, ft |
|---|---|---|---|---|
| Eastport | ME | 14.05 | 18.512 | 1.036 |
| Cutler, Little River | ME | 10.44 | 13.893 | 0.786 |
| Bangor | ME | 9.81 | 12.923 | 1.235 |
| Portland | ME | 8.93 | 11.49 | -1.509 |
| Jaffrey Point | NH | 8.48 | 10.916 | -1.433 |
| Fort Point | NH | 8.44 | 10.943 | -1.443 |
| Hampton Harbor | NH | 8.14 | 10.546 | -1.664 |
| Bar Harbor | ME | 7.97 | 10.773 | 0.69 |
All 31 stations, grouped by state, each with its own curve.
Guides
-
Reading predictions, October 17, 2026
High Tide vs Slack Tide: What NOAA Predicts
High tide vs slack tide: one is a water height NOAA predicts, the other is a current with no horizontal motion, and the two do not share a clock.