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 07:30 AM and sunset is at 04:17 PM.

Days 1–3 Weather Summary

A light covering of new snow, mostly falling on Mon afternoon. Icy conditions (max 2°C on Sun morning, min -8°C on Tue night). Winds increasing (calm on Sun night, fresh winds from the WNW by Mon night).

Days 4–6 Weather Summary

A dusting of snow turning to light rain (total 7mm) on Wed afternoon. Icy conditions (max 9°C on Thu morning, min -3°C on Fri night). Winds decreasing (fresh winds from the S on Wed night, calm by Fri night).

Days 7–9 Weather Summary

A dusting of snow on Sat night. Freezing level rising with drizzle on Sun morning. Freeze-thaw conditions (max 2°C on Sat night, min -4°C on Sun night). Winds decreasing (strong winds from the NW on Sun afternoon, calm by Mon night).

Days 10–12 Weather Summary

A light covering of new snow, mostly falling on Tue morning. Becoming milder with light rain (total 3mm) on Tue afternoon. Freeze-thaw conditions (max 3°C on Tue afternoon, min -5°C on Wed afternoon). Winds increasing (calm on Tue afternoon, fresh winds from the NW by Wed morning).

Sunday
7
Monday
8
Tuesday
9
Wednesday
10
Thursday
11
Friday
12
Saturday
13
Sunday
14
Monday
15
Tuesday
16
Wednesday
17
Thursday
18
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
2:46PM0.29m
2:45AM0.34m
3:21PM0.25m
3:35AM0.30m
3:51PM0.21m
4:20AM0.27m
4:20PM0.19m
5:06AM0.25m
8:25PM0.19m
6:49AM0.25m
9:26PM0.22m
8:12AM0.26m
9:57PM0.25m
9:03AM0.28m
10:22PM0.29m
9:50AM0.30m
10:46PM0.33m
10:40AM0.33m
11:07PM0.36m
11:41AM0.35m
11:25PM0.38m
12:50PM0.36m
11:40PM0.40m
Low Tide
9:26AM0.20m
7:44PM0.20m
10:37AM0.18m
8:19PM0.17m
11:36AM0.17m
8:55PM0.16m
12:20PM0.16m
9:42PM0.16m
12:51PM0.17m
10:59PM0.18m
1:10PM0.18m
00:13AM0.21m
1:32PM0.20m
1:27AM0.23m
2:12PM0.22m
2:58AM0.25m
3:16PM0.25m
4:25AM0.27m
4:16PM0.28m
5:12AM0.29m
4:56PM0.30m
5:49AM0.31m
5:28PM0.32m
Wave
height (m) 
direction
period (s) 
part cloud
cloud
cloud
light snow
mod snow
snow showers
part cloud
part cloud
part cloud
light snow
light rain
rain showers
light rain
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
cloud
light snow
rain showers
cloud
cloud
cloud
cloud
light snow
light snow
light snow
light snow
part cloud
part cloud
part cloud
light snow
part cloud
part cloud
some clouds
cloudy
cloudy
light snow
mod snow
snow shwrs
some clouds
some clouds
some clouds
light snow
light rain
rain shwrs
light rain
some clouds
some clouds
some clouds
some clouds
cloudy
some clouds
cloudy
light snow
rain shwrs
cloudy
cloudy
cloudy
cloudy
light snow
light snow
light snow
light snow
some clouds
some clouds
some clouds
light snow
some clouds
some clouds
 km/h
15
WSW
20
WNW
5
WNW
15
ESE
30
NW
25
WNW
20
W
10
WSW
5
SSW
30
SSE
5
SSW
25
SSE
20
WSW
10
SW
20
W
20
W
20
W
5
W
10
E
15
NE
30
ENE
20
SW
35
WNW
30
W
20
W
10
WSW
5
SE
25
E
5
S
5
WSW
35
NW
20
WSW
20
WSW
15
W
20
WNW
20
WNW
 mm 
4
1
2
1
3
max°C
2
2
-2
-1
-3
-6
-6
-6
-2
2
6
8
9
6
2
-1
-1
-2
-2
0
2
2
0
-3
-2
-2
-2
1
3
2
-1
-2
-2
0
0
-4
Moonrise
7:09
8:30
9:47
10:59
12:08
1:15
2:20
3:26
4:33
5:39
6:44
Moonset
10:32
11:07
11:33
11:54
12:12
12:28
12:44
1:00
1:19
1:42
2:10
2:46
Sunrise
7:30
7:31
7:31
7:33
7:33
7:33
7:35
7:35
7:37
7:37
7:37
7:39
Sunset
4:17
4:17
4:17
4:17
4:17
4:17
4:17
4:17
4:17
4:19
4:19
4:19
Today's sea temperature in Johnstown is
7.0° C
(Statistics for 07 Dec 1981-2005 – mean: 3.9 max: 6.4 min: 2.3°C)
Issued (local time): 7 am Sunday 07 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest