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 07:26 AM and sunset is at 07:28 PM.

Days 1–3 Weather Summary

Mostly dry. Cool air temperatures (max 14°C on Thu afternoon, min 2°C on Tue morning). Wind will be generally light.

Days 4–6 Weather Summary

Light rain (total 2mm), mostly falling on Sat morning. Warm air temperatures (max 23°C on Sun afternoon, min 12°C on Fri morning). Wind will be generally light.

Days 7–9 Weather Summary

Heavy rain (total 26mm), heaviest during Mon night. Warm (max 27°C on Mon afternoon, min 8°C on Tue afternoon). Winds decreasing (fresh winds from the ENE on Mon night, light winds from the S by Wed night).

Days 10–12 Weather Summary

Moderate rain (total 16mm), heaviest on Fri night. Warm (max 25°C on Fri afternoon, min 13°C on Sat morning). Wind will be generally light.

Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Wednesday
25
Thursday
26
Friday
27
Saturday
28
Sunday
29
Monday
30
Tuesday
31
Wed
1
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
7:30AM1.62m
7:44PM1.61m
8:12AM1.64m
8:28PM1.71m
8:54AM1.64m
9:12PM1.79m
9:37AM1.61m
9:57PM1.83m
10:21AM1.55m
10:46PM1.83m
11:10AM1.48m
11:38PM1.80m
12:04PM1.41m
00:36AM1.75m
1:05PM1.35m
1:41AM1.69m
2:14PM1.31m
2:49AM1.65m
3:25PM1.33m
3:58AM1.63m
4:33PM1.39m
5:02AM1.65m
5:35PM1.48m
6:00AM1.66m
6:30PM1.59m
6:51AM1.67m
7:20PM1.68m
7:37AM1.66m
Low Tide
1:46PM-0.01m
2:04AM-0.07m
2:27PM-0.08m
2:49AM-0.11m
3:07PM-0.13m
3:35AM-0.12m
3:49PM-0.15m
4:22AM-0.09m
4:33PM-0.13m
5:11AM-0.03m
5:20PM-0.09m
6:05AM0.05m
6:12PM-0.03m
7:04AM0.13m
7:12PM0.04m
8:09AM0.19m
8:19PM0.09m
9:18AM0.21m
9:29PM0.11m
10:25AM0.18m
10:38PM0.08m
11:24AM0.12m
11:40PM0.02m
12:16PM0.05m
00:34AM-0.03m
1:03PM-0.01m
1:24AM-0.07m
1:45PM-0.05m
Wave
height (m) 
direction
period (s) 
0.6
SSE
8
0.5
SE
7
0.6
SE
8
0.9
SE
9
0.8
SE
9
0.7
SE
9
0.7
SE
9
0.6
SE
9
0.6
SE
9
0.6
ESE
9
0.6
ESE
9
0.6
ESE
9
0.6
ESE
9
0.6
ESE
9
0.5
ESE
9
0.6
ESE
9
0.8
SE
6
0.9
S
5
0.7
S
5
0.8
S
5
1.5
E
6
1.9
E
8
1.7
E
8
1.3
ESE
8
1.1
SE
7
1.1
SE
7
0.9
SE
6
1
SE
7
1
SE
6
1
SE
6
0.9
SE
7
0.9
SE
7
0.9
SE
8
1.3
E
6
1.3
ESE
8
1.3
ESE
8
1.6
ESE
8
1.6
ESE
9
1.4
SE
9
1.2
ESE
9
1
ESE
8
1.4
ESE
7
1.4
ESE
8
1
ESE
9
0.9
ESE
9
0.8
ESE
9
0.7
ESE
8
part cloud
clear
clear
part cloud
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
rain showers
rain showers
part cloud
cloud
clear
clear
clear
part cloud
heavy rain
light rain
light rain
light rain
part cloud
light rain
part cloud
rain showers
part cloud
clear
thunderstorm
thunderstorm
rain showers
clear
part cloud
part cloud
cloud
cloud
part cloud
part cloud
part cloud
rain showers
clear
clear
clear
clear
clear
some clouds
clear
clear
some clouds
some clouds
some clouds
clear
clear
some clouds
some clouds
some clouds
some clouds
rain shwrs
rain shwrs
some clouds
cloudy
clear
clear
clear
some clouds
heavy rain
light rain
light rain
light rain
some clouds
light rain
some clouds
rain shwrs
some clouds
clear
risk tstorm
risk tstorm
rain shwrs
clear
some clouds
some clouds
cloudy
cloudy
some clouds
some clouds
some clouds
rain shwrs
clear
clear
clear
clear
clear
 km/h
15
NW
15
WNW
15
N
15
NE
10
ESE
10
N
10
NNE
10
SE
5
SSW
5
W
10
SSE
10
S
5
SSW
10
SE
10
SSE
15
SW
25
SSW
15
SW
15
W
15
SW
30
ENE
30
NE
25
NE
15
ENE
15
E
15
SE
10
SSE
20
S
20
S
15
S
15
SSW
15
SSW
15
NNE
25
NE
20
E
20
ENE
25
ENE
25
ENE
10
SSE
10
SW
15
N
25
NNE
25
NNE
15
NNE
10
NE
10
E
15
SE
 mm 
1
1
19
1
1
3
2
1
2
1
12
1
max°C
4
11
10
6
10
10
10
14
13
15
18
16
16
18
19
21
23
20
23
27
19
11
10
14
19
18
21
22
22
21
22
25
20
16
18
17
17
17
20
22
25
15
10
15
14
14
16
Moonrise
6:37
7:06
7:34
8:05
8:39
9:18
10:04
10:59
12:02
1:09
2:18
3:26
4:31
5:33
6:33
7:32
Moonset
6:16
7:21
8:27
9:35
10:47
11:59
1:11
2:17
3:15
4:04
4:44
5:18
5:48
6:15
6:42
Sunrise
7:26
7:26
7:24
7:22
7:22
7:20
7:20
7:18
7:16
7:16
7:13
7:13
7:11
7:09
7:09
7:07
Sunset
7:28
7:29
7:30
7:30
7:30
7:31
7:31
7:32
7:34
7:35
7:35
7:36
7:37
7:37
7:37
7:38
Today's sea temperature in Fort Johnson, Charleston Harbor is
15.2° C
(Statistics for 17 Mar 1981-2005 – mean: 19.3 max: 21.5 min: 16.8°C)
Issued (local time): 1 am Tuesday 17 Mar 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest