Heights in feet above Mean Lower Low Water (MLLW). Dots are NOAA's predicted highs and lows; the line between them is our interpolation. Shaded: night.
| Tide | Time | Height |
|---|---|---|
| High tide | 12:37 AM | 8.13 ft |
| Low tide | 6:24 AM | -0.09 ft |
| High tide | 12:45 PM | 9.12 ft |
| Low tide | 7:00 PM | -0.99 ft |
| Day | High tides | Low tides |
|---|---|---|
| Today Tue, Oct 27 | 12:37 AM 8.1 ft12:45 PM 9.1 ft | 6:24 AM -0.1 ft7:00 PM -1.0 ft |
| Tomorrow Wed, Oct 28 | 1:24 AM 8.1 ft1:32 PM 9.2 ft | 7:10 AM -0.1 ft7:49 PM -1.0 ft |
| Thu, Oct 29 | 2:13 AM 8.0 ft2:21 PM 9.1 ft | 7:59 AM 0.1 ft8:41 PM -0.8 ft |
| Fri, Oct 30 | 3:06 AM 7.7 ft3:15 PM 8.8 ft | 8:51 AM 0.3 ft9:37 PM -0.5 ft |
| Sat, Oct 31 | 4:04 AM 7.5 ft4:16 PM 8.5 ft | 9:49 AM 0.6 ft10:39 PM -0.2 ft |
| Sun, Nov 1 | 4:09 AM 7.3 ft4:23 PM 8.2 ft | 9:54 AM 0.8 ft10:45 PM 0.0 ft |
| Mon, Nov 2 | 5:17 AM 7.2 ft5:33 PM 7.9 ft | 11:04 AM 0.9 ft11:51 PM 0.2 ft |
Orange: measured by NOAA's sensor, last 24 hours (6-minute data, preliminary). Dashed: predicted tide, through the next 24 hours. The prediction contains only the astronomical tide; wind, air pressure and river flow move the real water level away from it.
Atlantic Heights is a subordinate station: NOAA computes its tides from Portland with fixed time and height corrections.
All New Hampshire tide stations →
On Tuesday, October 27, high tide at Atlantic Heights is at 12:37 AM (8.1 ft) and 12:45 PM (9.1 ft); low tide is at 6:24 AM (-0.1 ft) and 7:00 PM (-1.0 ft) (EDT, heights above MLLW). The table above lists the next 7 days.
The highest predicted tide in the next 12 months is 9.5 ft on December 25, 2026 at 12:01 PM. The largest tides fall a day or two after a full or new moon, especially when the Moon is closest to Earth.
Yes — on 141 days in the next 12 months the low tide drops below 0 ft (MLLW). The lowest is -1.5 ft on January 23, 2027 at 6:06 PM. Minus tides expose the most shoreline, which is why tide-poolers look for them.
Station local time (EDT at the time this page was built), with daylight saving time applied where the area observes it — the same convention as NOAA's own tide tables.
From NOAA CO-OPS, the U.S. government tide station network (tidesandcurrents.noaa.gov); the predictions are public domain. Atlantic Heights is a subordinate station: NOAA derives its times and heights from the reference station Portland with fixed corrections. The curve between highs and lows is our interpolation. This page is not for navigation.