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 07:13 AM and sunset is at 04:38 PM.

Days 1–3 Weather Summary

Some drizzle, heaviest during Mon night. Icy conditions (max 5°C on Sat night, min -4°C on Sun night). Winds increasing (light winds from the S on Sat afternoon, fresh winds from the NW by Sun night).

Days 4–6 Weather Summary

Light rain (total 7mm), mostly falling on Tue morning. Cool air temperatures (max 10°C on Thu night, min 2°C on Wed afternoon). Winds decreasing (fresh winds from the NW on Tue night, light winds from the SE by Wed night).

Days 7–9 Weather Summary

Light rain (total 3mm), mostly falling on Fri morning. Freeze-thaw conditions (max 14°C on Fri afternoon, min -4°C on Sat night). Winds decreasing (fresh winds from the NW on Fri afternoon, calm by Sun afternoon).

Days 10–12 Weather Summary

Mostly dry. Freeze-thaw conditions (max 12°C on Tue afternoon, min 0°C on Wed morning). Winds increasing (light winds from the SW on Mon morning, fresh winds from the SSW by Mon night).

Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
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
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
4:00PM1.09m
4:30AM1.42m
5:07PM1.13m
5:31AM1.48m
Low Tide
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
10:24AM0.00m
10:21PM-0.07m
11:23AM-0.08m
11:19PM-0.11m
Wave
height (m) 
direction
period (s) 
0.9
SE
10
0.7
SE
9
1.2
S
5
1
ESE
9
0.9
ESE
9
0.8
ESE
10
0.5
ESE
10
0.4
ESE
10
0.5
ESE
9
1.2
S
6
0.8
S
6
0.6
S
6
1
N
4
0.7
ENE
6
0.9
E
9
1
E
10
1.3
ESE
11
1
ESE
12
1.1
ESE
13
1.3
SSE
7
1
SSE
7
0.8
SE
7
0.7
SE
7
0.6
ENE
6
0.4
ENE
6
0.4
ENE
6
0.3
E
6
0.3
ESE
12
0.4
SSW
2
1.2
S
5
1.3
S
6
0.8
S
6
0.6
S
6
0.8
E
6
0.8
ENE
5
0.8
ENE
6
clear
part cloud
clear
clear
part cloud
clear
clear
cloud
light rain
light rain
cloud
part cloud
clear
clear
cloud
light rain
cloud
light rain
light rain
light rain
clear
cloud
part cloud
part cloud
clear
clear
clear
part cloud
cloud
part cloud
cloud
cloud
cloud
cloud
cloud
cloud
clear
some clouds
clear
clear
some clouds
clear
clear
cloudy
light rain
light rain
cloudy
some clouds
clear
clear
cloudy
light rain
cloudy
light rain
light rain
light rain
clear
cloudy
some clouds
some clouds
clear
clear
clear
some clouds
cloudy
some clouds
cloudy
cloudy
cloudy
cloudy
cloudy
cloudy
 km/h
10
NW
10
S
30
SSW
25
WNW
30
NW
30
NW
15
NW
10
W
20
SSW
25
SW
15
W
25
WNW
30
NNW
10
NE
10
S
20
SSW
25
SW
15
S
25
SW
25
WSW
30
NW
25
NNW
20
N
15
NNE
5
N
5
W
10
WSW
10
SW
15
S
35
SSW
25
SW
15
WNW
15
N
15
NE
15
NE
10
NNE
 mm 
1
2
3
2
1
2
max°C
-1
2
5
5
4
-2
0
3
4
6
9
9
4
3
4
5
5
10
13
14
7
0
0
-3
0
0
1
2
5
7
10
12
5
2
3
5
Moonrise
8:02
8:47
9:25
9:57
10:25
10:49
11:13
11:36
12:01
12:29
1:04
1:47
Moonset
4:57
5:59
7:03
8:09
9:14
10:20
11:27
12:35
1:46
3:02
4:20
Sunrise
7:13
7:13
7:15
7:15
7:15
7:16
7:16
7:16
7:16
7:16
7:16
7:16
Sunset
4:38
4:39
4:39
4:40
4:40
4:42
4:43
4:43
4:44
4:45
4:45
4:45
Today's sea temperature in Nummy Island, Grassy Sound Channel is
5.7° C
(Statistics for 20 Dec 1981-2005 – mean: 7.6 max: 9.4 min: 5.2°C)
Issued (local time): 12 pm Saturday 20 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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