Johnstown Sea Conditions and Tide Table

Johnstown 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 05:52 PM.

Days 1–4 Weather Summary

Mostly dry. Icy conditions (max 2°C on Wed night, min -13°C on Thu night). Wind will be generally light.

Days 5–7 Weather Summary

Light rain (total 3mm), mostly falling on Sun morning. Icy conditions (max 7°C on Sun morning, min -2°C on Sun night). Winds decreasing (fresh winds from the SSW on Sat night, light winds from the SSW by Sun night).

Days 8–10 Weather Summary

A moderate fall of snow, heaviest on Wed afternoon. Freeze-thaw conditions (max 11°C on Tue afternoon, min -9°C on Tue night). Winds decreasing (fresh winds from the NW on Tue night, calm by Wed afternoon).

Days 11–13 Weather Summary

A light covering of new snow, mostly falling on Sat afternoon. Becoming milder with light rain (total 3mm) on Sat afternoon. Freeze-thaw conditions (max 8°C on Sun night, min -6°C on Mon morning). Winds increasing (calm on Fri night, strong winds from the WNW by Mon morning).

Wed
4
Thursday
5
Friday
6
Saturday
7
Sunday
8
Monday
9
Tuesday
10
Wednesday
11
Thursday
12
Friday
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wednesday
18
Thursday
19
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
night
Wave Height Map
High Tide
1:55PM0.27m
1:58AM0.29m
2:38PM0.26m
2:42AM0.27m
3:05PM0.25m
3:16AM0.25m
3:16PM0.25m
3:43AM0.25m
3:18PM0.26m
4:04AM0.25m
3:32PM0.28m
4:20AM0.27m
4:04PM0.31m
4:31AM0.29m
5:03PM0.34m
9:49AM0.31m
8:37PM0.38m
10:39AM0.35m
9:21PM0.43m
11:20AM0.38m
9:50PM0.47m
11:47AM0.41m
10:17PM0.50m
11:55AM0.44m
10:47PM0.52m
11:55AM0.46m
11:23PM0.52m
12:12PM0.47m
Low Tide
6:52PM0.21m
8:33AM0.19m
7:29PM0.21m
8:50AM0.19m
8:12PM0.20m
9:04AM0.19m
9:56PM0.21m
9:26AM0.20m
10:59PM0.21m
9:59AM0.22m
11:36PM0.23m
10:41AM0.24m
00:16AM0.26m
11:27AM0.27m
1:07AM0.30m
7:16AM0.31m
12:19PM0.31m
3:13AM0.34m
7:06AM0.34m
1:30PM0.34m
6:41AM0.37m
3:08PM0.36m
6:16AM0.39m
4:19PM0.38m
6:12AM0.40m
5:08PM0.38m
6:16AM0.40m
5:50PM0.38m
6:25AM0.39m
6:28PM0.36m
Wave
height (m) 
direction
period (s) 
cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
part cloud
cloud
cloud
cloud
light rain
clear
clear
part cloud
clear
clear
cloud
part cloud
part cloud
cloud
light snow
light snow
light snow
light snow
part cloud
part cloud
clear
part cloud
light snow
light snow
light rain
cloud
cloud
part cloud
cloud
cloud
part cloud
cloud
cloud
mod snow
heavy rain
part cloud
part cloud
cloud
cloud
part cloud
cloudy
some clouds
some clouds
some clouds
clear
clear
some clouds
some clouds
cloudy
cloudy
cloudy
light rain
clear
clear
some clouds
clear
clear
cloudy
some clouds
some clouds
cloudy
light snow
light snow
light snow
light snow
some clouds
some clouds
clear
some clouds
light snow
light snow
light rain
cloudy
cloudy
some clouds
cloudy
cloudy
some clouds
cloudy
cloudy
mod snow
heavy rain
some clouds
some clouds
cloudy
cloudy
some clouds
 km/h
15
W
20
WNW
25
NNW
15
NNW
5
NW
5
WNW
10
S
5
ESE
15
S
15
S
25
SSW
20
WSW
20
NW
5
SSW
15
SW
15
SSW
20
SSW
25
SSW
20
W
20
NW
10
NNW
0
SSE
10
ENE
15
E
10
NE
25
NW
15
WNW
15
WNW
5
S
25
SSE
20
SW
10
WSW
15
S
25
SSW
35
W
45
WNW
40
NW
30
NW
15
NW
10
S
45
SSE
20
SW
25
SW
20
WSW
30
W
25
WNW
20
W
 mm 
3
2
1
10
11
max°C
1
2
-9
-10
-12
-10
-7
-5
-2
0
5
7
4
-1
4
6
2
6
11
0
-8
-7
-7
-4
-3
-3
-3
-2
-2
-1
6
6
3
7
8
-6
-6
-8
-7
-6
4
6
4
1
-3
-3
-5
Moonrise
7:30
8:39
9:48
10:57
1:05
2:11
3:12
4:04
4:48
5:23
5:51
6:14
6:34
6:53
7:11
Moonset
7:13
7:30
7:49
9:12
9:39
10:14
10:58
11:52
12:55
2:04
3:17
4:30
5:45
7:01
8:18
Sunrise
6:33
6:31
6:30
7:28
6:26
6:24
6:22
6:20
6:18
6:16
6:15
6:13
6:11
6:09
6:07
Sunset
5:52
5:54
5:55
5:58
6:59
6:00
6:01
6:02
6:04
6:06
6:07
6:07
6:09
6:10
6:12
6:14
Today's sea temperature in Johnstown is
-0.3° C
(Statistics for 04 Mar 1981-2005 – mean: -0.5 max: 0.3 min: -1.3°C)
Issued (local time): 1 pm Wednesday 04 Mar 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest