Grassy Key tide times

north side, Florida Bay, FLnorth side, Florida BayNOAA 8723921Wednesday, September 30 · EDTWed Sep 30Predictions onlyChange station
MonthWeek
Print month

Month calendar

Today at Grassy Key the next high tide is at 7:21 PM (1.1 ft). Tomorrow's first low is at 12:56 AM. Spring tides peak today, so expect bigger highs and lower lows.

Estimated now
0.2 ft ↑
Rising 0.1 ft per hour
Next high
7:21 PM
In 4 h 43 min · 1.1 ft
Next low
12:56 AM
In 10 h 18 min · 0.9 ft
Tide range today
1.6 ft
Spring tides Wednesday
Predictions only. No live gauge at this station.

Today's tide

Estimated curve between high and low timesNightHeight above MLLW
0 ft2 ftNOW 2:3712:22 AMLow · 0.9 ft5:52 AMHigh · 1.8 ft1:39 PMLow · 0.2 ft7:21 PMHigh · 1.1 ft
Tide chart for Grassy Key, today. Low 0.9 ft at 12:22 AM, high 1.8 ft at 5:52 AM, low 0.2 ft at 1:39 PM, high 1.1 ft at 7:21 PM.

Heights and times are estimated from the reference station 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
  • Low12:22 AM0.9 ft
  • High5:52 AM1.8 ft
  • Low1:39 PM0.2 ft
  • High7:21 PM1.1 ft
Tide times for Grassy Key
TideTimeHeight
Low12:22 AM0.9 ft
High5:52 AM1.8 ft
Low1:39 PM0.2 ft
High7:21 PM1.1 ft
Sunrise
7:16 AM
First light 6:53
Sunset
7:13 PM
Last light 7:36
Moon
82%
Waning gibbous
Tide range
1.6 ft
Spring tides Wed

Best windows today

Plan the week →
  • Fishing
    5:00 to 8:00 PM

    Today's best window (6:00 to 7:00 AM) has passed. Dawn light with the outgoing tide around the 1:39 PM low. Second window 6:00 to 7:00 PM.

  • Tidepools & shelling
    1:00 to 2:00 PM
    Earlier today: 1:00 to 2:00 PM

    Today's best window (1:00 to 2:00 PM) has passed.

  • Surfing
    4:00 to 7:00 PM

    Mid tide from 4:00 to 7:00 PM. No wind sensor at this station.

  • Shallow boat launch
    Avoid 8:00 to 12:00 AM

    Under 1.5 ft around low water. Launch before 8:00 AM.

Plan the week

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

Next 7 days

September calendar →
High and low tides for the next 7 days, heights in ft
DayTide 1Tide 2Tide 3Tide 4Range, ft
TodayWed 30L12:22a0.9H5:52a1.8L1:39p0.2H7:21p1.11.6 spring tide
ThuOct 1L12:56a0.9H6:35a1.8L2:39p0.2H8:21p1.01.5 spring tide
FriOct 2L1:34a1.0H7:26a1.7L3:50p0.3H9:38p0.91.4
SatOct 3L2:24a1.1H8:32a1.7L5:09p0.5H11:13p0.91.2
SunOct 4L3:42a1.2H9:57a1.6L6:28p0.51.1
MonOct 5H12:29a1.0L5:22a1.2H11:30a1.6L7:33p0.61.0
TueOct 6H1:18a1.1L6:52a1.1H12:49p1.6L8:24p0.71.0

Spring tides Wednesday to Thursday. Lows drop to 0.2 ft, the best low-water days this week. Spring and neap 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

  • Slack2:50 AM
  • Max ebb5:47 AM 1.6 kn
  • Slack9:07 AM
  • Max flood12:04 PM 1.2 kn
  • Slack4:02 PM
  • Max ebb6:28 PM 1.1 kn
  • Slack9:43 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, from this station's own tide records
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 mean range is small, about 0.7 ft, so wind and pressure can matter as much as the tide itself. That is smaller than most Florida stations on this site. The next spring tides peak today, with a range of 1.6 ft. Neap tides follow on October 7, when the range shrinks to 0.9 ft.

Grassy Key is a subordinate station, so NOAA publishes only its high and low times and heights. 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.

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