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 |
|---|---|---|
| Low tide | 4:15 AM | -0.10 ft |
| High tide | 10:34 AM | 3.69 ft |
| Low tide | 5:06 PM | 0.03 ft |
| High tide | 11:00 PM | 2.97 ft |
| Day | High tides | Low tides |
|---|---|---|
| Today Tue, Oct 27 | 10:34 AM 3.7 ft11:00 PM 3.0 ft | 4:15 AM -0.1 ft5:06 PM 0.0 ft |
| Tomorrow Wed, Oct 28 | 11:24 AM 3.7 ft11:52 PM 2.9 ft | 5:00 AM -0.1 ft5:55 PM 0.1 ft |
| Thu, Oct 29 | 12:16 PM 3.6 ft | 5:47 AM 0.0 ft6:49 PM 0.2 ft |
| Fri, Oct 30 | 12:45 AM 2.8 ft1:10 PM 3.5 ft | 6:41 AM 0.1 ft7:52 PM 0.3 ft |
| Sat, Oct 31 | 1:42 AM 2.8 ft2:08 PM 3.3 ft | 7:44 AM 0.3 ft8:59 PM 0.3 ft |
| Sun, Nov 1 | 1:42 AM 2.7 ft2:08 PM 3.2 ft | 7:55 AM 0.4 ft9:01 PM 0.3 ft |
| Mon, Nov 2 | 2:46 AM 2.7 ft3:13 PM 3.0 ft | 9:05 AM 0.4 ft9:58 PM 0.3 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.
On Tuesday, October 27, high tide at Portsmouth, Naval Shipyard is at 10:34 AM (3.7 ft) and 11:00 PM (3.0 ft); low tide is at 4:15 AM (-0.1 ft) and 5:06 PM (0.0 ft) (EDT, heights above MLLW). The table above lists the next 7 days.
The highest predicted tide in the next 12 months is 3.9 ft on October 1, 2027 at 10:41 AM. The largest tides fall a day or two after a full or new moon, especially when the Moon is closest to Earth.
Yes — on 113 days in the next 12 months the low tide drops below 0 ft (MLLW). The lowest is -0.7 ft on January 23, 2027 at 3:23 AM. 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. The curve between highs and lows is our interpolation. This page is not for navigation.