Fort Johnson, Charleston Harbor Sea Conditions and Tide Table

Fort Johnson, Charleston Harbor Sea Conditions table showing wave height, swell direction and period.

High and low tide times are also provided on the table along with the moon phase and forecast weather. Sunrise today is at 07:03 AM and sunset is at 07:40 PM.

Days 1–3 Weather Summary

Light rain (total 2mm), mostly falling on Sun afternoon. Warm air temperatures (max 24°C on Sun afternoon, min 15°C on Mon morning). Wind will be generally light.

Days 4–6 Weather Summary

Mostly dry. Cool air temperatures (max 19°C on Tue afternoon, min 12°C on Wed morning). Winds increasing (light winds from the NNE on Tue morning, fresh winds from the ENE by Wed morning).

Days 7–9 Weather Summary

Mostly dry. Warm (max 22°C on Sun afternoon, min 18°C on Fri morning). Wind will be generally light.

Days 10–12 Weather Summary

Mostly dry. Warm (max 25°C on Tue afternoon, min 19°C on Tue morning). Wind will be generally light.

Saturday
4
Sunday
5
Monday
6
Tuesday
7
Wednesday
8
Thursday
9
Friday
10
Saturday
11
Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Friday
17
Saturday
18
Sun
19
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
Wave Height Map
High Tide
10:09AM1.46m
10:35PM1.69m
10:43AM1.39m
11:11PM1.63m
11:18AM1.33m
11:49PM1.56m
11:56AM1.28m
00:32AM1.51m
12:40PM1.24m
1:21AM1.46m
1:34PM1.22m
2:18AM1.44m
2:35PM1.23m
3:17AM1.44m
3:38PM1.28m
4:16AM1.46m
4:38PM1.38m
5:11AM1.50m
5:34PM1.50m
6:03AM1.55m
6:25PM1.64m
6:52AM1.58m
7:14PM1.77m
7:40AM1.60m
8:03PM1.88m
8:28AM1.60m
8:51PM1.94m
9:16AM1.58m
Low Tide
4:13PM0.05m
4:51AM0.10m
4:48PM0.11m
5:31AM0.17m
5:26PM0.18m
6:13AM0.25m
6:06PM0.24m
7:00AM0.31m
6:53PM0.30m
7:52AM0.35m
7:49PM0.34m
8:50AM0.36m
8:52PM0.34m
9:49AM0.33m
9:58PM0.31m
10:44AM0.26m
11:00PM0.24m
11:35AM0.16m
11:57PM0.15m
12:23PM0.06m
00:50AM0.06m
1:09PM-0.03m
1:41AM-0.02m
1:54PM-0.11m
2:30AM-0.08m
2:38PM-0.15m
3:19AM-0.09m
3:25PM-0.16m
Wave
height (m) 
direction
period (s) 
0.8
SE
6
0.7
SE
8
0.9
SSE
5
1.1
SE
6
1.1
SE
6
0.9
SSE
6
1
E
6
1
E
5
0.7
SE
8
0.8
ESE
8
1
E
5
1.3
E
5
1.8
ESE
8
1.7
ESE
8
1.6
ESE
8
1.4
ESE
8
1.3
ESE
8
1.3
ESE
8
1.3
ESE
8
1.3
ESE
8
1.3
ESE
8
1.4
ESE
8
1.4
ESE
8
1.3
ESE
8
1.2
ESE
8
1
ESE
9
1
ESE
10
0.9
ESE
10
0.8
ESE
10
0.8
ESE
10
0.7
ESE
10
0.7
ESE
10
0.6
ESE
10
0.5
ESE
10
0.6
ESE
10
0.7
ESE
9
0.8
ESE
9
0.8
S
4
0.7
S
4
0.6
S
5
0.6
S
5
0.8
SSE
4
0.9
SSE
5
0.8
SSE
5
1.2
SSE
6
1.1
SSE
6
1
SSE
6
part cloud
clear
clear
clear
thunderstorm
light rain
cloud
cloud
cloud
part cloud
clear
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
thunderstorm
some clouds
clear
clear
clear
risk tstorm
light rain
cloudy
cloudy
cloudy
some clouds
clear
some clouds
some clouds
clear
some clouds
some clouds
some clouds
some clouds
cloudy
some clouds
some clouds
some clouds
some clouds
some clouds
some clouds
clear
clear
clear
clear
clear
clear
some clouds
some clouds
some clouds
clear
clear
clear
clear
clear
clear
clear
clear
clear
some clouds
some clouds
some clouds
risk tstorm
 km/h
15
S
15
S
20
S
25
SSW
15
SSW
10
WNW
20
NE
15
E
10
NE
15
NE
20
E
25
NE
35
ENE
30
ENE
20
E
25
E
20
E
15
ENE
25
ENE
25
E
20
E
25
E
25
E
15
E
15
ESE
15
ESE
10
ESE
5
SSE
20
S
10
SW
5
WSW
15
S
5
SSE
5
S
15
S
15
SSW
15
SW
20
S
15
SSW
15
SSW
15
S
15
S
15
S
15
S
20
S
20
SSW
20
SSW
 mm 
1
1
1
max°C
23
23
22
23
24
21
16
19
16
17
19
18
13
16
17
19
19
19
20
21
20
20
21
21
21
22
21
22
24
21
23
25
22
23
24
21
24
27
22
24
24
23
23
25
23
24
25
Moonrise
10:29
11:28
12:26
1:19
2:08
2:52
3:30
4:04
4:34
5:03
5:32
6:02
6:34
7:12
7:57
Moonset
8:06
8:41
9:21
10:06
10:57
11:53
12:52
1:53
2:55
3:57
5:01
6:06
7:14
8:26
9:40
Sunrise
7:03
7:03
7:01
7:00
6:58
6:56
6:56
6:54
6:54
6:52
6:50
6:50
6:48
6:48
6:47
6:45
Sunset
7:40
7:42
7:42
7:43
7:44
7:45
7:45
7:45
7:46
7:46
7:47
7:49
7:50
7:50
7:51
7:52
Today's sea temperature in Fort Johnson, Charleston Harbor is
18.9° C
(Statistics for 04 Apr 1981-2005 – mean: 19.4 max: 22.3 min: 17.4°C)
Issued (local time): 1 am Saturday 04 Apr 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest