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 | 12:00 AM | 5.58 ft |
| Low tide | 5:54 AM | 0.06 ft |
| High tide | 12:12 PM | 6.38 ft |
| Low tide | 6:36 PM | -0.44 ft |
| Day | High tides | Low tides |
|---|---|---|
| Today Tue, Oct 27 | 12:00 AM 5.6 ft12:12 PM 6.4 ft | 5:54 AM 0.1 ft6:36 PM -0.4 ft |
| Tomorrow Wed, Oct 28 | 12:47 AM 5.5 ft1:00 PM 6.3 ft | 6:40 AM 0.1 ft7:26 PM -0.3 ft |
| Thu, Oct 29 | 1:38 AM 5.4 ft1:52 PM 6.2 ft | 7:31 AM 0.3 ft8:19 PM -0.1 ft |
| Fri, Oct 30 | 2:32 AM 5.3 ft2:49 PM 5.9 ft | 8:28 AM 0.5 ft9:18 PM 0.2 ft |
| Sat, Oct 31 | 3:31 AM 5.1 ft3:51 PM 5.6 ft | 9:30 AM 0.7 ft10:20 PM 0.4 ft |
| Sun, Nov 1 | 3:35 AM 5.0 ft3:57 PM 5.4 ft | 9:38 AM 0.8 ft10:25 PM 0.5 ft |
| Mon, Nov 2 | 4:41 AM 5.1 ft5:06 PM 5.3 ft | 10:48 AM 0.8 ft11:28 PM 0.5 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.
Guilford Harbor is a subordinate station: NOAA computes its tides from Bridgeport with fixed time and height corrections.
All Connecticut tide stations →
On Tuesday, October 27, high tide at Guilford Harbor is at 12:00 AM (5.6 ft) and 12:12 PM (6.4 ft); low tide is at 5:54 AM (0.1 ft) and 6:36 PM (-0.4 ft) (EDT, heights above MLLW). The table above lists the next 7 days.
The highest predicted tide in the next 12 months is 6.5 ft on September 30, 2027 at 11:38 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 123 days in the next 12 months the low tide drops below 0 ft (MLLW). The lowest is -1.1 ft on January 23, 2027 at 5:38 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. Guilford Harbor is a subordinate station: NOAA derives its times and heights from the reference station Bridgeport with fixed corrections. The curve between highs and lows is our interpolation. This page is not for navigation.