Fort Johnson tide times

Charleston Harbor, SCCharleston HarborNOAA 8665726Tuesday, October 20 · EDTTue Oct 20Predictions onlyChange station
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Today at Fort Johnson the next low tide is at 10:20 PM (1.5 ft). Tomorrow's first low is at 10:28 AM.

Estimated now
3.2 ft ↓
Falling 1.0 ft per hour
Next low
10:20 PM
In 2 h 57 min · 1.5 ft
Next high
4:17 AM
In 8 h 54 min · 5.0 ft
Tide range today
3.9 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 ft4 ftNOW 7:233:22 AMHigh · 4.7 ft9:29 AMLow · 1.5 ft4:00 PMHigh · 5.3 ft10:20 PMLow · 1.5 ft
Tide chart for Fort Johnson, today. High 4.7 ft at 3:22 AM, low 1.5 ft at 9:29 AM, high 5.3 ft at 4:00 PM, low 1.5 ft at 10:20 PM.

Heights and times are estimated from Charleston, Cooper River Entrance 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
  • High3:22 AM4.7 ft
  • Low9:29 AM1.5 ft
  • High4:00 PM5.3 ft
  • Low10:20 PM1.5 ft
Tide times for Fort Johnson
TideTimeHeight
High3:22 AM4.7 ft
Low9:29 AM1.5 ft
High4:00 PM5.3 ft
Low10:20 PM1.5 ft
Sunrise
7:28 AM
First light 7:03
Sunset
6:42 PM
Last light 7:07
Moon
69%
Waxing gibbous
Tide range
3.9 ft
Mean 4.8 ft

Best windows today

Plan the week →
  • Fishing
    7:30 to 10:00 PM

    Today's best window (7:00 to 8:00 AM) has passed. Dawn light with the outgoing tide around the 9:29 AM low.

  • Tidepools & shelling
    Next: Thu 11:00 AM to 12:00 PM
    Earlier today: 9:00 to 10:00 AM

    Today's best window (9:00 to 10:00 AM) has passed.

  • Surfing
    Next: Wed 1:00 to 2:00 PM
    Earlier today: 12:00 to 2:00 PM

    Today's best window (12:00 to 2:00 PM) has passed.

  • Shallow boat launch
    Avoid 10:00 to 11:00 PM

    Under 1.5 ft around low water. Launch before 10:00 PM.

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 20H3:22a4.7L9:29a1.5H4:00p5.3L10:20p1.53.9
WedOct 21H4:17a5.0L10:28a1.4H4:51p5.4L11:07p1.24.2
ThuOct 22H5:10a5.3L11:24a1.1H5:40p5.5L11:52p0.94.7
FriOct 23H5:59a5.6L12:17p0.9H6:25p5.64.8
SatOct 24L12:36a0.5H6:45a6.0L1:09p0.6H7:08p5.75.5
SunOct 25L1:20a0.3H7:29a6.3L1:59p0.4H7:51p5.76.1
MonOct 26L2:05a0.0H8:13a6.6L2:49p0.3H8:36p5.66.5 spring tide

King tides Oct 26 to Oct 29. 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 8665726.

Nearby stations

Currents

South Chan., 0.4 mi. NW of Ft. Johnson

  • Max flood1:26 AM 0.4 kn
  • Slack3:58 AM
  • Max ebb7:55 AM 1.3 kn
  • Slack11:41 AM
  • Max flood1:55 PM 0.5 kn
  • Slack4:49 PM
  • Max ebb8:45 PM 1.8 kn

Current predictions for South Chan., 0.4 mi. NW of Ft. Johnson, 0.6 mi away. Currents near inlets can be strong. Not for navigation.

Station details

Datum
Mean lower low water
Predictions
NOAA subordinate, from Charleston, Cooper River Entrance
Live gauge
None
Coordinates
32.752° N, 79.898° W
Time zone
Eastern, UTC−4
Station ID
NOAA 8665726

About the tides at Fort Johnson

Fort Johnson has a semidiurnal tide: two highs and two lows of similar height each day, about 12 hours and 25 minutes apart. The pattern follows the reference station at Charleston, Cooper River Entrance. The average range is about 4.8 ft. Spring tides add a little more at both ends. The next spring tides peak on October 27, with a range of 6.7 ft. Neap tides follow today, when the range shrinks to 3.9 ft. In the next 12 months the highest predicted tide here is 6.7 ft on October 1, and the lowest is −1.5 ft on January 23.

Fort Johnson is a subordinate station. NOAA predicts its tides by adjusting Charleston, Cooper River Entrance: highs come about 5 min and lows about 2 min earlier than there. The nearest other station is Fort Sumter, 1 mi away, where high tide comes about 7 min later. For tidal currents, see South Chan., 0.4 mi. NW of Ft. Johnson.

Predictions are based on Charleston, Cooper River Entrance.

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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.