Great St Lawrence Harbour (2) Sea Conditions and Tide Table

Great St Lawrence Harbour (2) 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 04:23 PM.

Days 1–4 Weather Summary

Some drizzle, heaviest during Sun night. Icy conditions (max 6°C on Sun night, min -4°C on Tue morning). Winds decreasing (near gales from the W on Sat night, light winds from the WNW by Mon afternoon).

Days 5–7 Weather Summary

Mostly dry. Air temperatures will be below freezing (max -2°C on Fri morning, min -6°C on Tue night). Winds increasing (light winds from the NNE on Wed afternoon, fresh winds from the N by Thu afternoon).

Days 8–10 Weather Summary

Moderate rain (total 15mm) heaviest on Sat morning, then becoming colder with a dusting of snow on Sun morning. Freeze-thaw conditions (max 6°C on Sat morning, min -4°C on Sat night). Winds increasing (light winds from the SW on Fri afternoon, gales from the SE by Sat morning).

Days 11–13 Weather Summary

Mostly dry. Temperatures will be below freezing (max -2°C on Mon afternoon, min -5°C on Wed morning). Winds decreasing (fresh winds from the WSW on Mon afternoon, calm by Tue morning).

Sat
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thu
1
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
Wave Height Map
High Tide
8:51PM1.66m
9:22AM2.07m
9:30PM1.67m
10:02AM2.07m
10:12PM1.68m
10:44AM2.04m
10:58PM1.70m
11:29AM1.99m
11:46PM1.72m
12:16PM1.93m
00:37AM1.74m
1:04PM1.85m
1:29AM1.77m
1:54PM1.78m
2:24AM1.80m
2:49PM1.72m
3:23AM1.85m
3:50PM1.68m
4:28AM1.91m
4:57PM1.68m
5:36AM2.01m
6:06PM1.72m
6:40AM2.13m
Low Tide
3:20PM0.76m
3:03AM0.71m
3:57PM0.75m
3:41AM0.69m
4:32PM0.75m
4:20AM0.69m
5:07PM0.75m
4:59AM0.70m
5:43PM0.75m
5:42AM0.72m
6:21PM0.74m
6:28AM0.76m
7:05PM0.74m
7:22AM0.82m
7:57PM0.74m
8:27AM0.86m
8:59PM0.73m
9:45AM0.87m
10:06PM0.70m
11:06AM0.82m
11:12PM0.65m
12:16PM0.74m
00:11AM0.61m
Wave
height (m) 
direction
period (s) 
5
SSW
12
4
SSW
12
2.5
SW
12
2.5
SSW
11
3
S
8
2.2
S
9
1.9
SSW
9
1.6
SSW
9
1.2
SSW
9
1.3
SSW
9
1.1
SSW
8
0.8
S
9
0.7
SE
9
1.2
E
5
2
ENE
7
2.4
SSE
11
2
SE
11
1.6
SE
11
1.4
SE
10
1.9
SE
10
5.5
SE
10
4
SSE
10
4
S
10
3.5
SSW
11
3.5
SSW
10
2.5
SW
10
2.2
SSW
9
2.2
SW
8
1.6
SW
8
1.1
SW
8
0.9
SSW
7
0.8
S
7
1.3
ENE
5
1.7
ENE
6
1.8
SE
13
1.7
ESE
12
part cloud
part cloud
cloud
cloud
light rain
part cloud
part cloud
part cloud
cloud
cloud
part cloud
clear
clear
cloud
cloud
part cloud
clear
clear
part cloud
part cloud
heavy rain
light rain
part cloud
snow showers
cloud
snow showers
cloud
cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
part cloud
clear
some clouds
some clouds
cloudy
cloudy
light rain
some clouds
some clouds
some clouds
cloudy
cloudy
some clouds
clear
clear
cloudy
cloudy
some clouds
clear
clear
some clouds
some clouds
heavy rain
light rain
some clouds
snow shwrs
cloudy
snow shwrs
cloudy
cloudy
some clouds
some clouds
cloudy
cloudy
cloudy
cloudy
some clouds
clear
 km/h
50
W
40
WNW
25
SSW
35
S
35
SW
25
W
20
NW
20
N
20
NNW
20
NW
20
NW
15
NNW
15
NNE
25
NE
35
N
35
NNW
25
NW
15
WNW
10
SW
40
SSE
55
SSE
45
W
40
WSW
40
WSW
45
WSW
35
W
30
WSW
30
WSW
15
WNW
5
N
10
ESE
20
E
25
NE
30
NNE
20
N
15
NNW
 mm 
1
13
2
max°C
4
-1
0
3
6
1
2
-1
-4
-4
-5
-6
-6
-5
-4
-3
-4
-2
-1
2
6
4
-3
-4
-4
-2
-2
-2
-2
-4
-4
-3
-4
-4
-4
-3
Moonrise
9:32
10:05
10:31
10:52
11:10
11:27
11:43
12:01
12:22
12:49
1:25
2:14
Moonset
4:29
5:34
6:44
7:56
9:09
10:22
11:35
12:51
2:10
3:33
4:59
6:22
Sunrise
7:52
7:54
7:54
7:54
7:54
7:56
7:56
7:56
7:56
7:56
7:56
7:56
Sunset
4:23
4:24
4:24
4:25
4:25
4:27
4:28
4:28
4:29
4:30
4:30
4:31
Today's sea temperature in Great St Lawrence Harbour (2) is
3.5° C
(Statistics for 20 Dec 1981-2005 – mean: 3.1 max: 5.1 min: 1.4°C)
Issued (local time): 1 pm Saturday 20 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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