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 06:54 AM and sunset is at 07:45 PM.

Days 1–3 Weather Summary

Mostly dry. Warm air temperatures (max 24°C on Sat afternoon, min 17°C on Sat morning). Wind will be generally light.

Days 4–6 Weather Summary

Mostly dry. Warm air temperatures (max 24°C on Tue afternoon, min 19°C on Tue morning). Wind will be generally light.

Days 7–9 Weather Summary

Light rain (total 9mm), mostly falling on Sun night. Warm (max 28°C on Sun afternoon, min 14°C on Sun night). Mainly fresh winds.

Days 10–12 Weather Summary

Mostly dry. Warm (max 21°C on Wed morning, min 16°C on Mon morning). Winds decreasing (fresh winds from the ENE on Mon morning, calm by Thu morning).

Saturday
11
Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Friday
17
Saturday
18
Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sun
26
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
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
9:41PM1.97m
10:07AM1.54m
10:33PM1.95m
11:01AM1.48m
11:29PM1.90m
11:59AM1.44m
00:28AM1.82m
1:03PM1.40m
1:31AM1.74m
2:09PM1.39m
2:35AM1.68m
3:15PM1.43m
3:37AM1.63m
4:18PM1.50m
Low Tide
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
4:09AM-0.08m
4:13PM-0.14m
5:01AM-0.03m
5:04PM-0.09m
5:56AM0.04m
6:00PM-0.01m
6:55AM0.11m
7:01PM0.07m
7:57AM0.15m
8:07PM0.13m
9:00AM0.17m
9:15PM0.16m
10:01AM0.15m
Wave
height (m) 
direction
period (s) 
0.8
ESE
9
0.7
ESE
10
0.6
ESE
10
0.5
ESE
10
0.6
ESE
10
0.8
ESE
10
0.7
ESE
10
0.7
ESE
9
0.7
ESE
9
0.6
ESE
9
0.7
ESE
9
0.7
ESE
9
0.7
ESE
9
0.7
ESE
9
0.7
SE
9
0.7
SE
9
0.7
ESE
9
0.6
SSE
4
0.6
SE
5
0.7
ESE
8
0.6
ESE
8
0.6
SE
6
0.6
SE
5
0.8
SSE
5
0.6
SSE
5
0.6
SSE
5
1.8
E
7
1.8
ESE
9
1.9
ESE
9
1.7
ESE
9
1.6
ESE
8
1.5
ESE
8
1.2
ESE
8
1.1
ESE
8
1
ESE
8
0.8
ESE
8
0.8
ESE
8
0.7
ESE
8
0.8
ESE
8
0.7
ESE
10
0.8
ESE
10
0.8
SSE
4
0.8
SSE
5
0.8
S
4
1.1
S
5
0.9
SSE
6
0.9
SSE
6
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
clear
part cloud
clear
clear
clear
part cloud
light rain
mod rain
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
light rain
part cloud
rain showers
cloud
clear
clear
clear
clear
clear
clear
clear
clear
some clouds
clear
clear
clear
clear
clear
clear
clear
clear
some clouds
cloudy
clear
some clouds
clear
clear
clear
some clouds
light rain
mod rain
some clouds
some clouds
some clouds
some clouds
some clouds
cloudy
clear
clear
clear
clear
clear
clear
clear
clear
clear
some clouds
light rain
some clouds
rain shwrs
cloudy
 km/h
5
NW
15
S
10
SW
15
ESE
15
ESE
10
SSE
10
S
15
S
10
SSW
10
SSW
20
S
15
SSW
15
SSW
20
S
15
SSW
15
SSW
20
S
10
SW
10
SW
20
S
10
SW
15
SSW
20
S
15
SW
5
WNW
20
N
30
NE
35
ENE
30
ENE
25
ENE
25
ENE
25
ENE
15
ENE
20
E
15
ESE
10
SE
10
SSE
15
S
15
S
15
SSW
20
S
15
SSW
15
SW
20
SSW
25
SSW
15
WSW
20
SW
 mm 
1
8
1
1
max°C
21
24
21
22
23
22
22
23
20
22
24
20
23
23
21
22
23
21
25
27
22
24
25
22
26
28
17
18
18
18
19
20
20
21
21
20
22
22
21
23
24
21
23
25
21
23
27
Moonrise
3:30
4:04
4:34
5:03
5:32
6:02
6:34
7:12
7:57
8:50
9:52
11:00
12:10
1:19
2:24
3:26
Moonset
1:53
2:55
3:57
5:01
6:06
7:14
8:26
9:40
10:55
12:06
1:09
2:02
2:45
3:21
3:51
Sunrise
6:54
6:54
6:52
6:50
6:50
6:48
6:48
6:47
6:45
6:43
6:43
6:41
6:41
6:39
6:39
6:37
Sunset
7:45
7:46
7:46
7:47
7:49
7:50
7:50
7:51
7:52
7:52
7:52
7:53
7:54
7:54
7:55
7:57
Today's sea temperature in Fort Johnson, Charleston Harbor is
17.8° C
(Statistics for 11 Apr 1981-2005 – mean: 19.7 max: 21.7 min: 17.6°C)
Issued (local time): 7 am Saturday 11 Apr 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest