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 05:22 AM and sunset is at 08:15 PM.

Days 1–3 Weather Summary

Light rain (total 7mm), mostly falling on Sun afternoon. Warm air temperatures (max 27°C on Sun afternoon, min 13°C on Mon night). Winds increasing (light winds from the S on Sun night, fresh winds from the NW by Mon morning).

Days 4–6 Weather Summary

Mostly dry. Very warm air temperatures (max 37°C on Fri afternoon, min 16°C on Wed morning). Wind will be generally light.

Days 7–9 Weather Summary

Heavy rain (total 27mm), heaviest during Mon night. Warm (max 25°C on Sat morning, min 18°C on Sun morning). Wind will be generally light.

Days 10–12 Weather Summary

Moderate rain (total 12mm), heaviest on Thu night. Warm (max 23°C on Thu morning, min 17°C on Tue night). Wind will be generally light.

Sunday
20
Monday
21
Tuesday
22
Wednesday
23
Thursday
24
Friday
25
Saturday
26
Sunday
27
Monday
28
Tuesday
29
Wednesday
30
Thursday
31
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
Wave Height Map
High Tide
7:54AM2.55m
8:17PM3.09m
8:56AM2.52m
9:17PM3.12m
9:57AM2.53m
10:15PM3.14m
10:54AM2.55m
11:11PM3.15m
11:48AM2.59m
00:03AM3.13m
12:38PM2.63m
00:53AM3.09m
1:26PM2.66m
1:40AM3.02m
2:11PM2.68m
2:26AM2.92m
2:55PM2.69m
3:11AM2.80m
3:39PM2.69m
3:57AM2.67m
4:24PM2.68m
4:45AM2.55m
5:10PM2.66m
Low Tide
2:02PM0.20m
2:53AM-0.05m
3:02PM0.21m
3:53AM-0.08m
4:00PM0.19m
4:50AM-0.11m
4:57PM0.17m
5:44AM-0.12m
5:51PM0.14m
6:35AM-0.12m
6:42PM0.13m
7:22AM-0.10m
7:31PM0.14m
8:07AM-0.05m
8:19PM0.16m
8:50AM0.02m
9:07PM0.19m
9:33AM0.10m
9:55PM0.23m
10:17AM0.20m
10:44PM0.28m
11:02AM0.31m
11:34PM0.32m
Wave
height (m) 
direction
period (s) 
0.5
SSE
3.0
0.7
SE
4.0
0.4
ESE
6.0
0.6
NNW
3.0
0.8
NE
5.0
0.8
NE
5.0
0.4
NE
4.0
0.4
E
3.0
0.3
SSW
3.0
0.1
SE
8.0
0.3
SE
2.0
0.5
SSE
4.0
0.4
SE
5.0
0.4
SSW
3.0
0.5
S
3.0
0.4
SW
3.0
0.4
SSW
3.0
0.4
SE
6.0
0.2
ESE
8.0
0.3
SE
8.0
0.2
ESE
8.0
0.5
NE
4.0
0.4
NE
4.0
0.4
ESE
3.0
0.4
SE
5.0
0.6
SE
4.0
0.7
SE
4.0
0.6
SE
5.0
0.8
NE
4.0
1
NE
5.0
0.9
ENE
6.0
0.9
E
6.0
0.7
E
6.0
0.6
E
6.0
0.5
E
6.0
0.4
ESE
5.0
rain showers
thunderstorm
thunderstorm
clear
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
clear
clear
part cloud
cloud
cloud
heavy rain
light rain
part cloud
part cloud
cloud
clear
clear
cloud
cloud
heavy rain
rain shwrs
risk tstorm
risk tstorm
clear
some clouds
clear
clear
clear
clear
clear
some clouds
some clouds
clear
clear
clear
clear
clear
some clouds
some clouds
some clouds
clear
clear
clear
some clouds
cloudy
cloudy
heavy rain
light rain
some clouds
some clouds
cloudy
clear
clear
cloudy
cloudy
heavy rain
 km/h
20
S
10
SSW
15
NW
30
NW
10
ENE
15
NNW
10
ENE
20
SSE
15
WSW
5
E
15
SE
20
SW
20
SW
20
WSW
20
SW
20
WSW
20
WSW
15
W
15
ENE
10
SE
15
NNE
15
NE
15
ESE
15
SSE
15
SE
20
SSE
20
SSE
20
NNE
25
NNE
20
NNE
20
NNE
10
ENE
10
W
10
S
15
S
10
S
 mm 
1
4
2
27
1
11
max°C
25
27
23
22
22
19
17
19
18
20
22
23
28
35
32
33
37
32
25
24
23
19
21
20
21
23
20
20
19
19
18
20
20
23
22
19
Moonrise
12:46
1:30
2:26
3:34
4:48
6:05
7:18
8:28
9:35
10:39
11:42
12:46
Moonset
4:48
6:02
7:05
7:55
8:33
9:03
9:27
9:47
10:06
10:24
10:43
11:03
Sunrise
5:22
5:22
5:24
5:24
5:26
5:26
5:28
5:28
5:30
5:31
5:31
5:33
Sunset
8:15
8:15
8:14
8:13
8:12
8:10
8:09
8:08
8:07
8:07
8:06
8:05
Today's sea temperature in Plum Island Sound (south end) is 20.4 °C (Statistics for 20 Jul 1981-2005 – mean: 18.9 max: 20.8 min: 16.8°C)
Issued (local time): 1 am Sunday 20 Jul 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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