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 — and sunset is at 07:30 PM.

Days 1–4 Weather Summary

Mostly dry. Cool air temperatures (max 19°C on Sat afternoon, min 11°C on Sat morning). Wind will be generally light.

Days 5–7 Weather Summary

Some drizzle, heaviest during Mon night. Warm air temperatures (max 21°C on Wed afternoon, min 12°C on Thu morning). Wind will be generally light.

Days 8–10 Weather Summary

Mostly dry. Warm (max 21°C on Sat afternoon, min 15°C on Thu night). Wind will be generally light.

Days 11–13 Weather Summary

Light rain (total 4mm), mostly falling on Sun night. Warm (max 26°C on Wed afternoon, min 9°C on Tue morning). Wind will be generally light.

Fri
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wed
2
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
Wave Height Map
High Tide
1:06PM1.22m
1:55AM1.45m
2:06PM1.20m
3:00AM1.46m
3:14PM1.23m
4:05AM1.50m
4:22PM1.31m
5:07AM1.56m
5:25PM1.43m
6:04AM1.64m
6:23PM1.58m
6:56AM1.70m
7:16PM1.72m
7:46AM1.74m
8:07PM1.85m
8:35AM1.74m
8:58PM1.93m
9:24AM1.71m
9:48PM1.97m
10:14AM1.64m
10:39PM1.95m
11:06AM1.56m
11:33PM1.89m
Low Tide
7:25PM0.26m
8:32AM0.35m
8:29PM0.27m
9:36AM0.33m
9:38PM0.24m
10:38AM0.27m
10:46PM0.17m
11:35AM0.16m
11:48PM0.07m
12:27PM0.03m
00:44AM-0.04m
1:15PM-0.09m
1:38AM-0.13m
2:01PM-0.18m
2:29AM-0.19m
2:47PM-0.24m
3:19AM-0.21m
3:33PM-0.25m
4:10AM-0.17m
4:20PM-0.22m
5:02AM-0.10m
5:10PM-0.15m
5:56AM-0.00m
Wave
height (m) 
direction
period (s) 
0.4
SE
11
0.5
ESE
10
0.7
ESE
10
0.9
SSW
4
0.5
SSW
4
0.3
ESE
9
0.3
ESE
9
0.5
S
3
0.9
S
5
1
S
5
0.7
S
5
0.4
SSE
4
0.4
SE
4
0.5
S
3
0.4
S
4
0.7
E
4
0.5
E
4
0.7
ENE
4
0.6
E
5
0.4
SE
7
0.4
SE
8
0.4
SE
8
0.7
SE
7
0.8
SE
5
0.9
SE
6
0.9
SE
6
1
SE
7
0.8
SE
8
0.8
SE
9
0.7
SE
9
0.8
SE
9
0.9
ESE
7
0.7
SE
9
0.6
ESE
9
0.6
ESE
10
0.7
ESE
10
clear
clear
clear
clear
clear
clear
clear
clear
cloud
cloud
rain showers
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
cloud
part cloud
rain showers
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
cloudy
cloudy
rain shwrs
clear
clear
clear
clear
some clouds
clear
clear
clear
clear
clear
clear
clear
some clouds
some clouds
some clouds
cloudy
some clouds
rain shwrs
some clouds
some clouds
some clouds
some clouds
some clouds
some clouds
some clouds
 km/h
5
SSW
15
SW
15
WSW
20
SW
10
WSW
10
ESE
15
S
15
SW
20
SW
20
WSW
15
W
10
ENE
15
SSE
15
SW
15
NNW
15
E
5
NNE
15
ENE
15
SE
5
SSE
10
SE
15
SSE
15
S
20
S
20
S
15
SSW
20
SW
10
SSW
15
SW
10
N
20
NNE
15
NE
10
E
10
S
10
SSW
15
SW
 mm 
1.0
4
max°C
16
13
14
19
17
16
18
18
19
20
17
16
18
17
19
21
16
14
16
16
19
20
19
20
21
20
20
19
18
19
20
14
12
16
18
22
Moonrise
1:44
2:40
3:33
4:19
5:00
5:36
6:09
6:41
7:12
7:44
8:21
9:02
9:51
Moonset
11:22
12:16
1:16
2:22
3:30
4:39
5:49
6:59
8:11
9:24
10:39
11:54
Sunrise
7:20
7:20
7:18
7:16
7:16
7:13
7:13
7:11
7:09
7:09
7:07
7:05
Sunset
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 15.8 °C (Statistics for 21 Mar 1981-2005 – mean: 19.1 max: 21.5 min: 16.4°C)
Issued (local time): 1 pm Friday 21 Mar 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest