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 07:23 PM.

Days 1–4 Weather Summary

Moderate rain (total 11mm), heaviest on Fri afternoon. Cool air temperatures (max 18°C on Tue night, min 11°C on Thu night). Winds increasing (calm on Wed afternoon, strong winds from the S by Fri afternoon).

Days 5–7 Weather Summary

Light rain (total 7mm), mostly falling on Fri night. Cool air temperatures (max 14°C on Fri night, min 7°C on Sat night). Winds decreasing (near gales from the WNW on Fri night, light winds from the WSW by Sun night).

Days 8–10 Weather Summary

Mostly dry. Very mild (max 12°C on Mon night, min 6°C on Tue night). Winds increasing (light winds from the WNW on Mon night, fresh winds from the NE by Tue night).

Days 11–13 Weather Summary

Light rain (total 8mm), mostly falling on Fri afternoon. Very mild (max 16°C on Sun afternoon, min 10°C on Thu night). Winds decreasing (strong winds from the SSW on Fri afternoon, light winds from the SW by Sat night).

Days 14–17 Weather Summary

Moderate rain (total 11mm), heaviest on Wed afternoon. Very mild (max 17°C on Thu morning, min 9°C on Sun night). Winds increasing (light winds from the E on Mon afternoon, fresh winds from the S by Wed morning).

Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
Wednesday
23
Thursday
24
Friday
25
Saturday
26
Sunday
27
Monday
28
Tuesday
29
Wednesday
30
Thu
1
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
night
AM
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
High Tide
00:32AM1.70m
1:02PM1.91m
1:14AM1.61m
1:55PM1.85m
1:58AM1.54m
2:49PM1.80m
2:44AM1.49m
3:44PM1.76m
3:38AM1.46m
4:41PM1.75m
4:43AM1.47m
5:41PM1.76m
5:54AM1.53m
6:35PM1.79m
6:51AM1.64m
7:21PM1.83m
7:34AM1.77m
8:00PM1.87m
8:11AM1.89m
8:36PM1.88m
8:47AM2.01m
9:12PM1.89m
9:24AM2.10m
9:48PM1.87m
10:05AM2.15m
10:28PM1.83m
10:51AM2.16m
Low Tide
5:50AM0.62m
6:34PM0.80m
7:20PM0.89m
7:01AM0.81m
8:19PM0.97m
7:51AM0.90m
9:43PM1.00m
9:19AM0.95m
10:57PM0.97m
10:54AM0.92m
11:49PM0.90m
11:50AM0.85m
00:31AM0.81m
12:35PM0.77m
1:10AM0.72m
1:17PM0.68m
1:48AM0.63m
1:59PM0.61m
2:25AM0.54m
2:42PM0.55m
3:02AM0.47m
3:26PM0.52m
3:39AM0.41m
4:10PM0.50m
4:17AM0.39m
4:54PM0.53m
Wave
Height (m)
Direction
Period (s)
1.5
S
8
1.4
S
8
1.2
S
8
0.9
S
7
1
S
7
1.1
S
7
0.9
SSE
7
0.8
SSE
7
0.9
SSE
6
2
SSW
6
3
W
8
2.5
W
7
1.9
WNW
6
1.2
WNW
5
1
W
5
0.8
WSW
4
0.9
SW
5
1.4
SW
6
0.9
SW
6
0.6
WSW
6
0.6
WSW
5
1.5
NE
6
1.4
NE
6
1.2
S
10
0.7
S
9
0.6
S
8
0.9
W
4
0.7
WSW
4
1.1
SW
4
1.9
SSW
6
2.1
SW
8
1.5
SSW
8
1.3
SSW
7
1
SSW
7
0.9
SSW
6
0.9
SSW
6
0.9
S
6
0.9
S
6
0.7
S
8
0.9
ESE
4
0.7
SSE
8
0.7
SSE
8
1
SE
4
1.2
SE
5
2
S
6
1.6
SSW
6
1.7
SSW
6
clear
cloud
light rain
part cloud
clear
part cloud
part cloud
part cloud
mod rain
rain showers
part cloud
clear
clear
clear
cloud
cloud
light rain
rain showers
part cloud
cloud
cloud
part cloud
clear
clear
clear
clear
clear
part cloud
cloud
mod rain
part cloud
part cloud
clear
part cloud
cloud
cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
light rain
mod rain
part cloud
part cloud
clear
cloudy
light rain
some clouds
clear
some clouds
some clouds
some clouds
mod rain
rain shwrs
some clouds
clear
clear
clear
cloudy
cloudy
light rain
rain shwrs
some clouds
cloudy
cloudy
some clouds
clear
clear
clear
clear
clear
some clouds
cloudy
mod rain
some clouds
some clouds
clear
some clouds
cloudy
cloudy
some clouds
some clouds
clear
some clouds
some clouds
some clouds
some clouds
light rain
mod rain
some clouds
some clouds
km/h
20
ESE
15
ENE
10
E
15
WNW
20
WNW
25
W
15
W
10
WSW
20
S
40
W
60
WNW
55
WNW
45
NW
35
NW
25
WNW
20
W
20
SW
30
WSW
10
W
10
NNE
20
NE
35
NNE
35
N
25
N
10
WNW
20
WNW
25
W
15
WSW
25
S
40
S
20
W
20
W
20
WSW
10
W
15
SSW
20
SSW
20
WNW
25
NNE
15
NE
20
ESE
20
ESE
20
SE
20
SSE
30
SSE
35
SSW
20
SW
30
SW
 mm
4
7
4
2
1
8
4
7
max °C
18
13
16
15
18
18
14
14
14
14
10
11
9
9
11
10
12
13
12
11
12
10
9
12
11
12
12
11
13
15
13
14
15
13
15
16
15
11
12
11
10
10
11
14
15
15
17
Moonrise
1:14
2:18
3:15
4:02
4:39
5:09
5:33
5:53
6:10
6:27
6:44
7:02
7:25
7:52
8:29
Moonset
9:23
10:03
10:52
11:50
12:55
2:04
3:15
4:27
5:39
6:52
8:08
9:27
10:48
12:10
1:28
Sunrise
6:48
6:50
6:52
6:52
6:54
6:56
6:56
6:58
7:00
7:01
7:01
7:03
7:05
7:05
7:07
7:09
Sunset
7:23
7:22
7:20
7:17
7:15
7:14
7:12
7:09
7:07
7:06
7:04
7:01
7:00
6:58
6:55
6:53
Today's sea temperature in Great St Lawrence is
14.3°C
(Statistics for 15 Sep 1981-2005 – mean: 14.1 max: 17.6 min: 11.9°C)
Issued (local time): 8 pm Tuesday 15 Sep 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest