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 06:58 AM and sunset is at 06:07 PM.

Days 1–3 Weather Summary

Light rain (total 4mm), mostly falling on Wed morning. Icy conditions (max 13°C on Tue night, min -4°C on Thu night). Winds increasing (light winds from the NNE on Wed morning, fresh winds from the NNW by Thu afternoon).

Days 4–6 Weather Summary

Light rain (total 2mm), mostly falling on Sat night. Cool air temperatures (max 18°C on Mon afternoon, min 5°C on Fri night). Wind will be generally light.

Days 7–9 Weather Summary

Mostly dry. Warm (max 20°C on Wed afternoon, min 10°C on Mon night). Wind will be generally light.

Days 10–12 Weather Summary

Light rain (total 3mm), mostly falling on Thu night. Warm (max 20°C on Sun morning, min 7°C on Fri night). Winds decreasing (fresh winds from the SW on Thu night, calm by Sat afternoon).

Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
1
Sun
2
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
11:58AM1.23m
00:44AM1.38m
12:48PM1.18m
1:41AM1.38m
1:46PM1.16m
2:44AM1.40m
2:51PM1.16m
3:47AM1.46m
3:55PM1.21m
4:45AM1.54m
4:54PM1.30m
5:39AM1.63m
5:49PM1.41m
6:28AM1.71m
6:40PM1.54m
7:15AM1.76m
7:29PM1.65m
8:01AM1.77m
8:18PM1.74m
8:46AM1.74m
9:06PM1.80m
9:33AM1.68m
Low Tide
6:18PM0.20m
7:10AM0.30m
7:10PM0.23m
8:11AM0.33m
8:11PM0.23m
9:15AM0.32m
9:16PM0.20m
10:16AM0.26m
10:18PM0.12m
11:11AM0.16m
11:15PM0.02m
12:01PM0.05m
00:08AM-0.09m
12:48PM-0.05m
00:58AM-0.17m
1:32PM-0.15m
1:47AM-0.23m
2:15PM-0.22m
2:35AM-0.24m
2:59PM-0.24m
3:25AM-0.21m
3:44PM-0.23m
Wave
height (m) 
direction
period (s) 
0.6
SE
9
0.8
ESE
5
0.7
E
6
0.7
ESE
8
0.9
ESE
8
0.9
NNE
4
0.8
E
6
0.5
ESE
8
0.4
ESE
8
0.4
ESE
8
0.4
ESE
8
0.4
ESE
8
0.5
ESE
6
0.6
E
5
0.6
ESE
6
0.5
SE
6
0.6
SE
6
0.6
SSW
4
0.6
SSE
6
1.1
SSW
5
1
SSW
5
0.7
S
6
0.5
S
6
0.4
SE
8
0.4
ESE
6
0.4
SE
8
1.5
S
6
1.2
S
7
0.8
NW
4
0.6
NNE
3
0.4
ESE
5
0.4
SE
9
0.4
SE
9
0.4
ESE
9
0.6
ESE
9
light rain
light rain
rain showers
part cloud
clear
clear
clear
clear
part cloud
cloud
cloud
rain showers
part cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
cloud
part cloud
rain showers
clear
clear
clear
part cloud
clear
part cloud
part cloud
part cloud
light rain
light rain
rain shwrs
some clouds
clear
clear
clear
clear
some clouds
cloudy
cloudy
rain shwrs
some clouds
cloudy
some clouds
clear
clear
clear
clear
clear
clear
clear
some clouds
some clouds
cloudy
some clouds
rain shwrs
clear
clear
clear
some clouds
clear
some clouds
some clouds
some clouds
 km/h
5
NNE
15
N
15
NNW
15
WNW
30
NNW
20
N
15
NNE
5
NE
10
NE
10
NE
10
ESE
10
NNE
10
NNE
10
ENE
5
SW
10
WNW
15
WSW
15
WSW
20
WSW
25
SW
25
SW
20
WNW
10
WNW
10
N
10
SSE
15
S
30
SW
30
WNW
25
NW
15
NE
10
ESE
10
SSE
5
SSE
5
N
15
ESE
 mm 
1.0
2.0
1.0
2.0
3
max°C
13
6
2
8
8
2
4
7
6
10
11
10
13
12
12
16
18
14
19
18
17
18
20
17
19
19
18
13
13
9
12
13
16
20
18
Moonrise
12:56
1:56
2:55
3:51
4:43
5:28
6:07
6:42
7:14
7:45
8:16
Moonset
10:23
10:59
11:41
12:31
1:29
2:34
3:43
4:54
6:04
7:14
8:24
9:34
Sunrise
6:58
6:56
6:56
6:54
6:54
6:52
6:50
6:50
6:48
6:48
6:47
6:46
Sunset
6:07
6:08
6:09
6:10
6:10
6:12
6:13
6:14
6:15
6:15
6:15
6:16
Today's sea temperature in Fort Johnson, Charleston Harbor is 13.1 °C (Statistics for 19 Feb 1981-2005 – mean: 19.5 max: 21.5 min: 17.3°C)
Issued (local time): 12 am Wednesday 19 Feb 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest