Florida
Grassy Key
north side, Florida Bay · Florida · NOAA station 8723921 · Tide predictions
24.7717, -80.9400
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48-hour outlook
Drag across the curve to inspect any time. Weather icons show the forecast at each high tide.
Drawn from the high/low predictions — NOAA publishes high/low only for this station.
The next seven days
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H = high tide · L = low tide · highs & lows in local time
On the water nearby
Satan Shoal, FL (244) buoy · 69 mi W · Station 42095
Wind & wave reports →
Nearby tide stations
- Toms Harbor Channel, Hwy. 1 bridge · 1.1 mi E
- Grassy Key, south side, Hawk Channel · 1.6 mi SW
- Duck Key, Hawk Channel · 1.7 mi E
- Toms Harbor Cut · 2.2 mi E
- Conch Key, eastern end · 3.8 mi E
Plan ahead
2027 tide extremes for this station
Highest predicted high tide: 1.8 ft — Sat Oct 30 · 3:51 AM
Lowest predicted low tide: -0.7 ft — Thu Jan 21 · 9:35 AM
Biggest single-day swing: 2.2 ft on Sun Jun 6
Best daytime minus tides of 2027
| Date | Low tide | Height |
|---|---|---|
| Thu Jan 21 | 9:35 AM | -0.7 ft |
| Fri Jan 22 | 10:20 AM | -0.7 ft |
| Wed Jan 20 | 8:45 AM | -0.7 ft |
| Sat Jan 23 | 11:02 AM | -0.6 ft |
| Tue Jan 19 | 7:48 AM | -0.5 ft |
| Thu Feb 18 | 8:32 AM | -0.5 ft |
| Fri Feb 19 | 9:17 AM | -0.5 ft |
| Wed Feb 17 | 7:36 AM | -0.5 ft |
| Sun Jan 24 | 11:42 AM | -0.5 ft |
| Sat Feb 20 | 9:57 AM | -0.5 ft |
198 minus tides (below 0 ft) are predicted here in 2027. The table shows up to the 10 lowest that fall between 7 AM and 7 PM — the ones worth planning a clam dig or tidepool walk around.
About this station
NOAA builds the predictions for Grassy Key, north side, Florida Bay from the KEY WEST station: high tides about 0.73× the height, 340 min later; low tides about 1.04× the height, 408 min later.
Two coasts, two personalities: modest 2 to 4 ft semidiurnal ranges on the Atlantic side, mixed tides on the Gulf side, and king tides that flood streets on calm, sunny days.