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 | 4:34 AM | -0.02 ft |
| High tide | 11:02 AM | 2.09 ft |
| Low tide | 4:01 PM | 0.60 ft |
| High tide | 10:12 PM | 3.09 ft |
| Day | High tides | Low tides |
|---|---|---|
| Today Tue, Oct 27 | 11:02 AM 2.1 ft10:12 PM 3.1 ft | 4:34 AM -0.0 ft4:01 PM 0.6 ft |
| Tomorrow Wed, Oct 28 | 11:53 AM 1.9 ft10:57 PM 3.1 ft | 5:23 AM -0.0 ft4:37 PM 0.6 ft |
| Thu, Oct 29 | 12:47 PM 1.8 ft11:49 PM 3.0 ft | 6:17 AM 0.0 ft5:17 PM 0.6 ft |
| Fri, Oct 30 | 1:46 PM 1.6 ft | 7:17 AM 0.1 ft6:06 PM 0.7 ft |
| Sat, Oct 31 | 12:47 AM 2.9 ft2:54 PM 1.6 ft | 8:25 AM 0.2 ft7:11 PM 0.7 ft |
| Sun, Nov 1 | 1:57 AM 2.7 ft3:07 PM 1.7 ft | 8:36 AM 0.3 ft7:43 PM 0.7 ft |
| Mon, Nov 2 | 2:21 AM 2.6 ft4:11 PM 1.9 ft | 9:42 AM 0.4 ft9:21 PM 0.7 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.
Grassy Key, south side, Hawk Channel is a subordinate station: NOAA computes its tides from Key West with fixed time and height corrections.
On Tuesday, October 27, high tide at Grassy Key, south side, Hawk Channel is at 11:02 AM (2.1 ft) and 10:12 PM (3.1 ft); low tide is at 4:34 AM (-0.0 ft) and 4:01 PM (0.6 ft) (EDT, heights above MLLW). The table above lists the next 7 days.
The highest predicted tide in the next 12 months is 3.1 ft on October 27, 2026 at 10:12 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 176 days in the next 12 months the low tide drops below 0 ft (MLLW). The lowest is -0.5 ft on January 21, 2027 at 2:21 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. Grassy Key, south side, Hawk Channel is a subordinate station: NOAA derives its times and heights from the reference station Key West with fixed corrections. The curve between highs and lows is our interpolation. This page is not for navigation.