Nummy Island, Grassy Sound Channel Sea Conditions and Tide Table

Nummy Island, Grassy Sound Channel 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 07:11 AM and sunset is at 04:37 PM.

Days 1–3 Weather Summary

Moderate rain (total 13mm), heaviest on Thu night. Icy conditions (max 14°C on Thu night, min -2°C on Fri night). Winds decreasing (strong winds from the W on Fri afternoon, light winds from the SSW by Sat afternoon).

Days 4–6 Weather Summary

Mostly dry. Icy conditions (max 7°C on Sun morning, min -3°C on Sun night). Winds decreasing (strong winds from the NW on Sun afternoon, calm by Mon night).

Days 7–9 Weather Summary

Mostly dry. Freeze-thaw conditions (max 18°C on Fri afternoon, min -2°C on Wed night). Winds increasing (calm on Wed night, fresh winds from the SW by Thu night).

Days 10–12 Weather Summary

Light rain (total 5mm), mostly falling on Sun afternoon. Freeze-thaw conditions (max 11°C on Sun night, min -3°C on Mon night). Wind will be generally light.

Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
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
6:56PM1.05m
7:11AM1.35m
7:35PM1.06m
7:48AM1.35m
8:14PM1.05m
8:24AM1.34m
8:52PM1.04m
9:00AM1.32m
9:31PM1.03m
9:38AM1.29m
10:13PM1.03m
10:19AM1.26m
10:58PM1.05m
11:06AM1.22m
11:47PM1.09m
11:57AM1.18m
00:37AM1.14m
12:51PM1.15m
1:30AM1.21m
1:49PM1.11m
2:27AM1.27m
2:53PM1.09m
3:28AM1.35m
Low Tide
1:05PM0.01m
1:00AM0.06m
1:48PM-0.02m
1:42AM0.06m
2:29PM-0.03m
2:23AM0.06m
3:08PM-0.04m
3:01AM0.07m
3:46PM-0.03m
3:39AM0.09m
4:22PM-0.02m
4:17AM0.11m
4:59PM-0.01m
4:58AM0.13m
5:38PM0.00m
5:48AM0.16m
6:23PM0.01m
6:54AM0.17m
7:18PM0.01m
8:10AM0.15m
8:21PM0.00m
9:21AM0.09m
9:22PM-0.03m
Wave
height (m) 
direction
period (s) 
0.6
SE
9
0.9
SSE
4
1.5
SSE
6
2.5
SSE
9
2.3
SE
10
1.6
SE
10
0.9
SE
10
0.6
SE
9
1.4
S
5
1.2
SSE
7
1.1
W
4
0.9
WNW
4
0.8
ESE
11
0.7
ESE
10
0.4
SE
10
1.1
SSW
4
1.1
SSW
6
0.6
S
6
0.6
N
3
0.6
NE
6
0.4
NE
4
0.4
SE
10
0.7
S
4
1.5
S
6
1.6
S
7
1.2
S
7
0.7
SSE
7
0.5
S
7
0.4
SSE
7
0.3
SSE
6
0.3
SSE
6
0.5
S
4
0.5
SSE
4
0.5
SE
4
0.4
SE
4
0.9
NE
5
part cloud
part cloud
mod rain
rain showers
rain showers
part cloud
clear
cloud
clear
part cloud
clear
clear
part cloud
part cloud
part cloud
cloud
cloud
cloud
part cloud
clear
part cloud
part cloud
cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
cloud
light rain
light rain
cloud
cloud
clear
some clouds
some clouds
mod rain
rain shwrs
rain shwrs
some clouds
clear
cloudy
clear
some clouds
clear
clear
some clouds
some clouds
some clouds
cloudy
cloudy
cloudy
some clouds
clear
some clouds
some clouds
cloudy
some clouds
some clouds
clear
some clouds
some clouds
some clouds
some clouds
cloudy
light rain
light rain
cloudy
cloudy
clear
 km/h
20
SE
20
SSE
40
SSE
35
SSW
45
W
35
WNW
20
WNW
10
SSW
35
SSW
25
WSW
35
WNW
35
NW
30
NW
20
NNW
5
SSW
35
SSW
25
WSW
20
WNW
25
NNW
20
NNW
10
NNE
15
SSW
25
SSW
35
SSW
35
SW
30
W
10
NW
10
NNW
5
WNW
10
S
15
SE
15
SE
10
NW
10
N
15
NNW
25
N
 mm 
8
4
1
3
2
max°C
11
13
14
12
6
0
0
3
6
7
6
-2
-1
-1
0
3
4
4
2
2
0
4
5
11
16
18
10
8
8
8
9
10
11
10
10
2
Moonrise
6:13
7:10
8:02
8:47
9:25
9:57
10:25
10:49
11:13
11:36
12:01
12:29
Moonset
3:15
4:02
4:57
5:59
7:03
8:09
9:14
10:20
11:27
12:35
1:46
Sunrise
7:11
7:13
7:13
7:13
7:15
7:15
7:15
7:16
7:16
7:16
7:16
7:16
Sunset
4:37
4:38
4:38
4:39
4:39
4:40
4:40
4:42
4:43
4:43
4:44
4:45
Today's sea temperature in Nummy Island, Grassy Sound Channel is
6.3° C
(Statistics for 18 Dec 1981-2005 – mean: 7.8 max: 10.2 min: 5.2°C)
Issued (local time): 12 pm Thursday 18 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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