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 06:50 AM and sunset is at 07:39 PM.

Days 1–3 Weather Summary

A moderate fall of snow, heaviest on Wed morning. Air temperatures will be below freezing (max -1°C on Fri night, min -9°C on Thu night). Winds decreasing (fresh winds from the ENE on Wed afternoon, calm by Fri morning).

Days 4–6 Weather Summary

A light covering of new snow, mostly falling on Sat morning will be washed away by heavy rain (total 27mm) on Mon morning. Icy conditions (max 5°C on Sun night, min -7°C on Sat night). Winds increasing (calm on Sun morning, near gales from the S by Sun night).

Days 7–9 Weather Summary

A dusting of new snow. Temperatures will be below freezing (max 0°C on Tue morning, min -6°C on Wed night). Winds decreasing (strong winds from the W on Tue morning, light winds from the NNW by Wed morning).

Days 10–12 Weather Summary

A heavy fall of snow, heaviest during Sat night. Freeze-thaw conditions (max 3°C on Sun night, min -4°C on Fri morning). Mainly fresh winds.

Wednesday
1
Thursday
2
Friday
3
Saturday
4
Sunday
5
Monday
6
Tuesday
7
Wednesday
8
Thursday
9
Friday
10
Saturday
11
Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thu
16
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
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
Wave Height Map
High Tide
9:08AM1.91m
9:19PM2.05m
9:46AM1.87m
9:55PM2.06m
10:23AM1.81m
10:33PM2.05m
10:58AM1.75m
11:12PM2.01m
11:35AM1.69m
11:56PM1.96m
12:12PM1.63m
00:43AM1.90m
12:50PM1.57m
1:31AM1.85m
1:31PM1.53m
2:20AM1.80m
2:16PM1.50m
3:10AM1.76m
3:09PM1.49m
4:05AM1.74m
4:13PM1.52m
5:02AM1.74m
5:23PM1.61m
5:58AM1.76m
6:22PM1.74m
6:48AM1.80m
7:10PM1.90m
7:33AM1.83m
7:54PM2.05m
Low Tide
2:46PM0.54m
3:10AM0.61m
3:21PM0.53m
3:48AM0.62m
3:54PM0.53m
4:25AM0.63m
4:25PM0.55m
5:01AM0.67m
4:56PM0.59m
5:37AM0.72m
5:27PM0.65m
6:17AM0.79m
6:00PM0.72m
7:01AM0.86m
6:38PM0.79m
7:55AM0.92m
7:27PM0.87m
9:05AM0.94m
8:42PM0.93m
10:14AM0.91m
10:14PM0.91m
11:11AM0.84m
11:21PM0.84m
11:59AM0.75m
00:15AM0.74m
12:44PM0.65m
1:06AM0.65m
1:28PM0.55m
Wave
height (m) 
direction
period (s) 
1.7
SSW
10
2.1
SSW
10
3
SSW
10
2.2
SW
10
1.7
SW
10
1.3
SW
9
0.9
SW
9
0.8
SW
9
0.8
SW
8
2
S
7
2.2
S
8
1.4
S
8
0.9
SSW
8
0.7
SW
8
2.2
SSE
6
3.5
SSW
9
3
SSW
9
3
SSW
9
3
SSW
10
3
SSW
10
2.1
SSW
10
1.5
SSW
9
1.2
SSW
9
1.1
SSW
8
1.6
SSE
12
2.2
S
12
1.7
SSE
11
1.4
SSE
10
1.3
SSE
10
1.1
SSE
10
0.9
SSE
9
0.8
SSE
9
1.4
SE
8
1.9
SE
9
2.5
SSE
10
2.3
SSE
10
1.9
SSE
10
1.7
SE
10
1.6
SE
10
1.4
SE
9
2.4
SSE
6
3
SSW
8
3
SW
9
2.5
SSW
9
1.7
SSW
9
1.3
SSW
9
1.3
S
9
mod snow
light snow
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
snow showers
snow showers
part cloud
part cloud
cloud
light snow
light snow
heavy rain
mod rain
part cloud
part cloud
part cloud
part cloud
cloud
light snow
part cloud
cloud
part cloud
clear
clear
clear
clear
cloud
light snow
heavy snow
light snow
snow showers
part cloud
cloud
cloud
cloud
cloud
light rain
part cloud
part cloud
part cloud
part cloud
cloud
cloud
mod snow
light snow
some clouds
some clouds
some clouds
some clouds
some clouds
cloudy
snow shwrs
snow shwrs
some clouds
some clouds
cloudy
light snow
light snow
heavy rain
mod rain
some clouds
some clouds
some clouds
some clouds
cloudy
light snow
some clouds
cloudy
some clouds
clear
clear
clear
clear
cloudy
light snow
heavy snow
light snow
snow shwrs
some clouds
cloudy
cloudy
cloudy
cloudy
light rain
some clouds
some clouds
some clouds
some clouds
cloudy
cloudy
 km/h
25
ENE
40
ENE
30
NE
25
NE
10
N
15
NNW
5
NNE
10
SW
25
SSE
35
E
35
N
15
NNW
10
NNE
15
SSE
50
SSE
45
SW
35
SW
40
SW
40
W
40
W
30
W
15
NW
10
N
35
NNW
30
NW
30
NW
20
NW
20
WSW
25
SW
15
SW
10
SSE
15
E
15
N
10
NNW
40
WNW
5
NW
20
E
20
ESE
15
SE
20
SSW
50
SSE
50
W
50
W
45
W
20
W
20
S
30
SE
 mm 
3
14
10
4
max°C
-2
-3
-4
-6
-5
-4
-6
-5
-1
0
0
-2
-6
-5
5
5
4
2
0
0
-2
-2
-3
-3
-4
-2
-1
-3
-2
-1
-1
-2
1
2
2
3
1
1
0
1
4
0
-1
-1
-3
-2
0
Moonrise
7:32
8:41
9:52
11:01
12:10
1:13
2:09
2:56
3:34
4:03
4:27
4:47
5:05
5:22
5:40
Moonset
6:26
6:42
6:59
7:19
7:43
8:15
8:54
9:44
10:43
11:49
1:00
2:13
3:27
4:42
6:00
7:20
Sunrise
6:50
6:48
6:47
6:45
6:43
6:41
6:39
6:37
6:35
6:33
6:31
6:30
6:28
6:26
6:24
6:22
Sunset
7:39
7:40
7:42
7:44
7:45
7:45
7:47
7:49
7:51
7:52
7:52
7:54
7:55
7:57
7:59
8:00
Today's sea temperature in Great St Lawrence is
0.7° C
(Statistics for 01 Apr 1981-2005 – mean: 0.9 max: 2.4 min: -0.3°C)
Issued (local time): 2 am Wednesday 01 Apr 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest