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 05:31 AM and sunset is at 08:45 PM.

Days 1–3 Weather Summary

Moderate rain (total 12mm), heaviest on Mon afternoon. Warm air temperatures (max 22°C on Sun afternoon, min 14°C on Mon night). Winds decreasing (fresh winds from the NW on Mon night, calm by Tue night).

Days 4–6 Weather Summary

Moderate rain (total 10mm), heaviest on Thu night. Warm air temperatures (max 23°C on Wed afternoon, min 14°C on Thu night). Wind will be generally light.

Days 7–9 Weather Summary

Mostly dry. Warm (max 26°C on Sat afternoon, min 13°C on Sat night). Wind will be generally light.

Days 10–12 Weather Summary

Some drizzle, heaviest during Wed night. Warm (max 25°C on Thu afternoon, min 12°C on Thu night). Wind will be generally light.

Sunday
20
Monday
21
Tuesday
22
Wednesday
23
Thursday
24
Friday
25
Saturday
26
Sunday
27
Monday
28
Tuesday
29
Wednesday
30
Thursday
31
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
9:14AM0.39m
10:08PM0.35m
10:11AM0.40m
11:03PM0.35m
11:04AM0.40m
11:55PM0.34m
11:58AM0.39m
00:47AM0.32m
12:58PM0.37m
1:40AM0.29m
2:00PM0.35m
2:34AM0.27m
2:54PM0.32m
3:22AM0.24m
3:36PM0.30m
4:05AM0.22m
4:06PM0.27m
4:42AM0.21m
4:32PM0.26m
5:05AM0.21m
4:59PM0.26m
5:15AM0.23m
9:47AM0.23m
5:36PM0.27m
5:32AM0.26m
Low Tide
4:45PM0.28m
2:05AM0.31m
6:02PM0.26m
6:55PM0.25m
7:44PM0.23m
6:30AM0.24m
8:33PM0.22m
7:04AM0.21m
9:31PM0.21m
7:32AM0.19m
10:41PM0.20m
7:55AM0.18m
11:43PM0.18m
8:11AM0.18m
00:17AM0.17m
8:17AM0.19m
00:27AM0.18m
8:00AM0.20m
00:32AM0.19m
7:33AM0.22m
12:25PM0.22m
00:46AM0.22m
Wave
height (m) 
direction
period (s) 
cloud
cloud
light rain
light rain
light rain
light rain
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
cloud
light rain
light rain
light rain
rain showers
clear
clear
clear
clear
part cloud
clear
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
rain showers
cloud
part cloud
clear
cloudy
cloudy
light rain
light rain
light rain
light rain
clear
clear
clear
some clouds
some clouds
some clouds
some clouds
cloudy
light rain
light rain
light rain
rain shwrs
clear
clear
clear
clear
some clouds
clear
clear
some clouds
some clouds
clear
clear
clear
clear
some clouds
rain shwrs
cloudy
some clouds
clear
 km/h
10
SSW
5
SSW
10
SSW
10
S
10
S
25
WNW
30
NW
25
NW
5
W
10
WNW
10
SSW
5
NNE
10
SSW
15
S
15
SSW
20
SSW
20
SSW
15
WNW
10
WNW
20
WNW
10
NNW
15
NW
15
NW
5
WSW
5
NW
10
SW
10
SSW
20
SW
25
SSW
15
SSW
10
SSW
20
S
10
SSW
5
W
15
WNW
5
N
 mm 
2
2
4
4
4
2
2
2
1
max°C
19
22
17
17
16
14
19
19
16
22
23
20
23
21
15
17
18
18
25
26
19
20
20
18
22
23
20
22
23
17
23
24
19
23
25
18
Moonrise
12:53
1:34
2:29
3:36
4:53
6:12
7:29
8:42
9:51
10:59
12:04
1:10
Moonset
5:20
6:35
7:39
8:27
9:03
9:30
9:52
10:09
10:25
10:41
10:57
11:15
Sunrise
5:31
5:33
5:33
5:35
5:35
5:37
5:37
5:39
5:39
5:41
5:43
5:43
Sunset
8:45
8:45
8:44
8:43
8:42
8:39
8:38
8:37
8:37
8:36
8:35
8:32
Today's sea temperature in Johnstown is 20.2 °C (Statistics for 20 Jul 1981-2005 – mean: 15.4 max: 17.5 min: 12.2°C)
Issued (local time): 8 am Sunday 20 Jul 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest