Grassy Key tide times

Grassy Key North Side, Florida Bay, FLGrassy Key North Side, Florida BayNOAA 8723921Tuesday, October 20 · EDTTue Oct 20Predictions onlyChange station
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Today at Grassy Key the next low tide is at 7:21 PM (0.8 ft). Tomorrow's first low is at 7:07 AM.

Estimated now
0.8 ft
Near slack, turning soon
Next low
7:21 PM
In 0 min · 0.8 ft
Next high
12:57 AM
In 5 h 36 min · 1.2 ft
Tide range today
0.6 ft
Neap tides Tuesday
Predictions only. No live gauge at this station.

Today's tide

Estimated curve between high and low timesNightHeight above MLLW
0 ft2 ftNOW 7:2012:25 AMHigh · 1.1 ft5:55 AMLow · 1.3 ft11:16 AMHigh · 1.4 ft7:21 PMLow · 0.8 ft
Tide chart for Grassy Key, today. High 1.1 ft at 12:25 AM, low 1.3 ft at 5:55 AM, high 1.4 ft at 11:16 AM, low 0.8 ft at 7:21 PM.

Heights and times are estimated from Key West using NOAA offsets. Only the high and low points are official; the curve between them is drawn by us.

Today's tides

ft above MLLW
  • High12:25 AM1.1 ft
  • Low5:55 AM1.3 ft
  • High11:16 AM1.4 ft
  • Low7:21 PM0.8 ft
Tide times for Grassy Key
TideTimeHeight
High12:25 AM1.1 ft
Low5:55 AM1.3 ft
High11:16 AM1.4 ft
Low7:21 PM0.8 ft
Sunrise
7:25 AM
First light 7:02
Sunset
6:54 PM
Last light 7:17
Moon
69%
Waxing gibbous
Tide range
0.6 ft
Mean 0.9 ft

Best windows today

Plan the week →
  • Fishing
    7:30 to 8:00 PM

    Today's best window (6:00 to 7:00 PM) has passed. Moving water near sunset, as the tide falls toward the 7:21 PM low.

  • Tidepools & shelling
    No daylight low today

    No daylight low today. The next good one is Monday at 10:00 AM.

  • Surfing
    Next: Wed 7:00 to 9:00 AM
    Earlier today: 2:00 to 4:00 PM

    Today's best window (2:00 to 4:00 PM) has passed.

  • Shallow boat launch
    Avoid 12:00 to 12:00 AM

    Water drops under 1.5 ft from 12:00 to 12:00 AM. Plan to be back on the trailer before then.

Plan the week

Moving water around the turn often fishes best. Local species and bait matter more than any chart.

Next 7 days

October calendar →
High and low tides for the next 7 days, heights in ft
DayTide 1Tide 2Tide 3Tide 4Range, ft
TodayTue 20H12:25a1.1L5:55a1.3H11:16a1.4L7:21p0.80.6
WedOct 21H12:57a1.2L7:07a1.2H12:27p1.5L8:01p0.80.6
ThuOct 22H1:25a1.3L8:03a1.0H1:26p1.5L8:35p0.90.6
FriOct 23H1:53a1.4L8:51a0.8H2:19p1.5L9:06p0.90.7
SatOct 24H2:22a1.5L9:35a0.5H3:08p1.5L9:37p0.91.0
SunOct 25H2:53a1.6L10:18a0.3H3:57p1.4L10:08p0.91.4
MonOct 26H3:26a1.7L11:02a0.1H4:45p1.3L10:40p0.91.7

King tides Oct 26 to Oct 31. The year's highest tides at this station, from our scan of NOAA predictions. About king tides

Tide predictions and observations: NOAA National Ocean Service, Center for Operational Oceanographic Products and Services (CO-OPS), station 8723921.

Nearby stations

Currents

Long Key Viaduct

  • Max ebb12:13 AM 0.8 kn
  • Slack2:49 AM
  • Max flood5:38 AM 0.6 kn
  • Slack8:39 AM
  • Max ebb11:41 AM 0.8 kn
  • Slack3:05 PM
  • Max flood6:42 PM 0.7 kn
  • Slack9:42 PM

Current predictions for Long Key Viaduct, 5 mi away. Currents near inlets can be strong. Not for navigation.

Station details

Datum
Mean lower low water
Predictions
NOAA subordinate, from Key West
Live gauge
None
Coordinates
24.772° N, 80.940° W
Time zone
Eastern, UTC−4
Station ID
NOAA 8723921

About the tides at Grassy Key

Grassy Key has a mixed tide. The two daily highs, and especially the two lows, can differ a lot in height. The pattern follows the reference station at Key West. The mean range is small, about 0.9 ft, so wind and pressure can matter as much as the tide itself. That is smaller than most Florida stations on this site. From the average lower low to the average higher high, the difference is 1.3 ft. The next spring tides peak on October 28, with a range of 1.9 ft. Neap tides follow today, when the range shrinks to 0.6 ft. In the next 12 months the highest predicted tide here is 1.9 ft on October 28, and the lowest is −0.7 ft on January 21.

Grassy Key is a subordinate station. NOAA predicts its tides by adjusting Key West: highs come about 340 min and lows about 408 min later than there. NOAA measured the tide here from 1970 to 1982 to set up these predictions. The nearest other station is Toms Harbor Channel, 1 mi away, where high tide comes about 33 min earlier. For tidal currents, see Long Key Viaduct.

Predictions are based on Key West.

Height unitsftmAdd this tide widget to your site. It's free.Week plannerPrintable October calendar

Tide predictions and water levels from NOAA CO-OPS. For planning only, not for navigation. Real water levels can differ because of wind, air pressure and river flow. Always check conditions on site.