Plum Island Sound (south end) Sea Conditions and Tide Table

Plum Island Sound (south end) 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 06:45 PM.

Days 1–4 Weather Summary

A dusting of snow turning to light rain (total 2mm) on Fri night. Icy conditions (max 6°C on Sat afternoon, min -3°C on Sun morning). Winds decreasing (fresh winds from the W on Sat afternoon, light winds from the E by Sun morning).

Days 5–7 Weather Summary

Heavy rain (total 20mm), heaviest during Mon night. Icy conditions (max 15°C on Mon night, min -5°C on Wed morning). Winds decreasing (near gales from the S on Mon night, light winds from the SE by Wed afternoon).

Days 8–10 Weather Summary

Light rain (total 3mm), mostly falling on Fri afternoon. Freeze-thaw conditions (max 4°C on Fri afternoon, min -5°C on Sat morning). Winds increasing (calm on Thu night, strong winds from the WNW by Sat morning).

Days 11–13 Weather Summary

A dusting of new snow. Freeze-thaw conditions (max 3°C on Mon afternoon, min -9°C on Mon night). Winds decreasing (strong winds from the WNW on Sat night, light winds from the W by Sun night).

Friday
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Wednesday
25
Thursday
26
Friday
27
Sat
28
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
High Tide
7:17PM2.16m
7:38AM2.51m
8:14PM2.17m
8:34AM2.55m
9:09PM2.23m
9:27AM2.60m
9:59PM2.33m
10:16AM2.68m
10:45PM2.47m
11:03AM2.75m
11:28PM2.64m
11:48AM2.82m
00:10AM2.80m
12:33PM2.87m
00:52AM2.96m
1:18PM2.89m
1:35AM3.08m
2:05PM2.87m
2:22AM3.15m
2:54PM2.82m
3:11AM3.17m
3:46PM2.73m
4:04AM3.13m
4:42PM2.63m
5:02AM3.06m
5:42PM2.54m
6:04AM2.97m
6:46PM2.49m
Low Tide
1:27AM0.56m
2:13PM0.39m
2:24AM0.54m
3:08PM0.34m
3:18AM0.47m
3:58PM0.27m
4:09AM0.37m
4:43PM0.19m
4:56AM0.24m
5:26PM0.11m
5:42AM0.10m
6:07PM0.04m
6:27AM-0.04m
6:47PM-0.01m
7:12AM-0.16m
7:29PM-0.04m
7:59AM-0.24m
8:13PM-0.04m
8:48AM-0.27m
9:00PM0.00m
9:40AM-0.24m
9:52PM0.06m
10:37AM-0.17m
10:49PM0.14m
11:37AM-0.09m
11:51PM0.21m
12:40PM-0.01m
Wave
height (m) 
direction
period (s) 
0.9
NNW
4
0.5
SE
9
0.4
ESE
11
1.3
SSE
5
0.8
SSW
4
0.7
WSW
3
0.8
NW
4
0.2
E
10
0.4
SE
3
0.9
SE
4
1.9
SE
7
1.6
SE
8
2.3
SE
8
1.6
SE
10
1.2
SE
11
1.1
SE
11
0.8
ESE
10
0.7
SE
10
0.7
SE
10
0.6
ESE
9
0.6
ESE
9
0.6
ESE
8
0.7
ESE
8
1.1
ESE
8
1.2
ESE
10
1.1
NNE
6
1
WNW
4
0.9
WNW
4
0.5
WNW
3
0.5
W
3
0.1
E
15
0.3
E
14
0.7
N
4
0.9
N
4
0.4
NNE
5
0.4
NE
4
0.8
S
4
0.4
SE
6
0.3
SSE
5
0.5
E
4
0.5
ENE
4
0.6
ENE
4
1
ENE
5
1.6
ENE
6
1.7
E
7
1.7
E
8
1.4
E
9
snow showers
part cloud
cloud
rain showers
part cloud
part cloud
clear
part cloud
part cloud
cloud
mod rain
light rain
mod rain
light rain
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
light rain
rain showers
clear
clear
clear
clear
cloud
snow showers
part cloud
part cloud
clear
cloud
part cloud
light snow
rain showers
cloud
light rain
cloud
light rain
mod snow
mod snow
cloud
part cloud
cloud
snow shwrs
some clouds
cloudy
rain shwrs
some clouds
some clouds
clear
some clouds
some clouds
cloudy
mod rain
light rain
mod rain
light rain
some clouds
clear
clear
some clouds
some clouds
some clouds
some clouds
some clouds
cloudy
light rain
rain shwrs
clear
clear
clear
clear
cloudy
snow shwrs
some clouds
some clouds
clear
cloudy
some clouds
light snow
rain shwrs
cloudy
light rain
cloudy
light rain
mod snow
mod snow
cloudy
some clouds
cloudy
 km/h
30
WNW
15
W
15
SW
25
S
30
W
35
W
30
WNW
10
E
20
SE
25
SSE
35
S
30
S
50
S
30
W
30
WNW
25
WNW
20
WNW
15
SE
15
S
15
SSE
15
SE
5
SE
20
SSW
20
SW
30
W
40
WNW
40
WNW
35
WNW
20
WNW
25
W
10
N
10
NW
30
NW
25
NW
15
NW
15
SSE
20
SSW
15
WSW
15
W
15
ENE
20
ENE
15
NE
25
NE
35
NNE
25
NE
20
ENE
15
E
 mm 
2
6
4
9
1
2
1
1
1
1
1
max°C
1
0
4
5
5
6
2
-2
1
4
10
13
15
9
4
0
-2
0
-1
1
2
1
2
4
4
-3
0
-2
-4
2
0
0
3
-1
-7
1
3
10
19
7
3
2
2
0
2
2
0
Moonrise
4:15
4:52
5:22
5:48
6:11
6:32
6:53
7:16
7:41
8:13
8:52
9:42
10:44
11:55
1:10
2:25
Moonset
12:51
1:58
3:08
4:19
5:30
6:43
7:57
9:14
10:34
11:54
1:11
2:19
3:15
3:58
4:32
Sunrise
6:58
6:56
6:56
6:54
6:52
6:50
6:48
6:47
6:45
6:43
6:41
6:39
6:37
6:35
6:35
6:33
Sunset
6:45
6:45
6:46
6:49
6:50
6:51
6:52
6:52
6:53
6:55
6:57
6:58
6:59
7:00
7:00
7:01
Today's sea temperature in Plum Island Sound (south end) is
3.5° C
(Statistics for 12 Mar 1981-2005 – mean: 3.2 max: 4.4 min: 1.4°C)
Issued (local time): 7 pm Thursday 12 Mar 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest