Great St Lawrence Sea Conditions and Tide Table

Great St Lawrence 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 —.

Days 1–4 Weather Summary

A dusting of snow. Milder later with heavy rain (total 26mm) on Thu afternoon. Icy conditions (max 9°C on Thu morning, min -6°C on Mon night). Winds decreasing (near gales from the WNW on Mon night, fresh winds from the SW by Wed afternoon).

Days 5–7 Weather Summary

A dusting of new snow. Icy conditions (max 6°C on Thu night, min -2°C on Fri night). Winds decreasing (near gales from the W on Sat morning, light winds from the WSW by Sun afternoon).

Days 8–10 Weather Summary

A dusting of new snow. Freeze-thaw conditions (max 1°C on Sun night, min -5°C on Wed morning). Winds increasing (calm on Sun night, strong winds from the WNW by Mon night).

Days 11–13 Weather Summary

A dusting of snow turning to light rain (total 7mm) on Fri afternoon. Freeze-thaw conditions (max 6°C on Fri afternoon, min -1°C on Wed night). Winds increasing (light winds from the E on Fri morning, near gales from the W by Fri night).

Tuesday
9
Wednesday
10
Thursday
11
Friday
12
Saturday
13
Sunday
14
Monday
15
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Sat
20
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
PM
Wave Height Map
High Tide
11:24PM1.79m
12:02PM2.11m
00:18AM1.77m
12:53PM1.99m
1:16AM1.76m
1:46PM1.87m
2:20AM1.76m
2:40PM1.76m
3:24AM1.79m
3:34PM1.67m
4:19AM1.83m
4:25PM1.60m
5:07AM1.88m
5:12PM1.55m
5:50AM1.92m
5:58PM1.53m
6:33AM1.95m
6:45PM1.51m
7:16AM1.98m
7:32PM1.52m
8:02AM1.99m
8:17PM1.54m
8:46AM2.01m
Low Tide
4:43AM0.61m
5:50PM0.62m
5:44AM0.74m
6:45PM0.66m
6:55AM0.85m
7:39PM0.69m
8:11AM0.92m
8:30PM0.73m
9:21AM0.95m
9:22PM0.75m
10:25AM0.95m
10:14PM0.76m
11:21AM0.93m
11:04PM0.75m
12:07PM0.89m
11:50PM0.73m
12:46PM0.85m
00:30AM0.70m
1:23PM0.80m
1:06AM0.66m
1:59PM0.76m
1:41AM0.63m
2:35PM0.72m
Wave
height (m) 
direction
period (s) 
2.3
SW
9
2.2
WSW
9
3
W
7
2.3
W
7
2
WSW
7
1.7
SW
7
2
SSW
7
3.5
S
8
4.5
S
11
4
S
12
3.5
S
11
4.5
SSW
10
5
SW
12
4.5
SW
12
4
SW
12
3
SW
11
1.9
SW
10
1.5
SW
9
1.3
SSW
9
1.2
SSW
8
2
S
11
2.5
SSW
9
1.7
SW
9
1.5
SSW
9
1.5
SW
9
1
SSW
9
1.1
SSW
8
2.5
SW
7
3
SW
8
2.5
SW
9
2.3
SW
10
1.8
SW
10
1.8
SW
10
3.5
SW
9
3
SW
11
3
SW
10
snow showers
part cloud
cloud
part cloud
part cloud
cloud
light rain
heavy rain
mod rain
part cloud
part cloud
light snow
part cloud
cloud
part cloud
part cloud
part cloud
cloud
light snow
light snow
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
light rain
light rain
cloud
cloud
light snow
light rain
rain showers
part cloud
cloud
snow shwrs
some clouds
cloudy
some clouds
some clouds
cloudy
light rain
heavy rain
mod rain
some clouds
some clouds
light snow
some clouds
cloudy
some clouds
some clouds
some clouds
cloudy
light snow
light snow
some clouds
some clouds
some clouds
some clouds
some clouds
some clouds
some clouds
light rain
light rain
cloudy
cloudy
light snow
light rain
rain shwrs
some clouds
cloudy
 km/h
45
WNW
45
WNW
50
W
40
W
30
WSW
30
SW
35
SSE
50
S
35
SW
35
WSW
40
WSW
50
WSW
50
WSW
55
W
50
W
35
W
20
W
10
WSW
15
ENE
20
NNW
30
WNW
40
WNW
30
WNW
25
W
25
NW
25
NW
25
WSW
45
SSW
40
WSW
40
WSW
25
W
25
ESE
30
SSW
50
W
35
WSW
45
SW
 mm 
5
12
9
1
2
2
2
max°C
-2
-2
-2
-2
0
3
7
9
7
6
2
0
-1
1
1
1
2
2
1
-1
-1
-2
-1
-1
-2
-4
-2
3
4
4
4
1
6
5
2
3
Moonrise
9:52
11:05
12:15
1:23
2:29
3:36
4:44
5:52
6:57
7:58
8:50
Moonset
11:44
12:04
12:21
12:36
12:51
1:06
1:24
1:46
2:13
2:49
3:34
4:29
Sunrise
7:43
7:45
7:46
7:47
7:48
7:48
7:50
7:50
7:50
7:52
7:52
7:52
Sunset
4:22
4:22
4:22
4:22
4:22
4:22
4:22
4:22
4:22
4:23
4:23
4:23
Today's sea temperature in Great St Lawrence is
5.7° C
(Statistics for 08 Dec 1981-2005 – mean: 4.1 max: 5.7 min: 2.6°C)
Issued (local time): 7 pm Monday 08 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest