Poponesset Island, Poponesset Bay, Nantucket Sound Sea Conditions and Tide Table

Poponesset Island, Poponesset Bay, Nantucket Sound 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 07:03 AM and sunset is at 04:13 PM.

Days 1–3 Weather Summary

Light rain (total 7mm), mostly falling on Fri morning. Icy conditions (max 13°C on Fri morning, min -4°C on Sun night). Winds decreasing (near gales from the S on Fri morning, light winds from the WSW by Sat afternoon).

Days 4–6 Weather Summary

Light rain (total 9mm), mostly falling on Tue afternoon. Icy conditions (max 4°C on Tue morning, min -4°C on Mon morning). Winds decreasing (strong winds from the WSW on Tue afternoon, light winds from the NW by Wed night).

Days 7–9 Weather Summary

Moderate rain (total 15mm) heaviest on Thu night, then becoming colder with a dusting of snow on Sat night. Freeze-thaw conditions (max 10°C on Thu night, min -3°C on Sat night). Winds decreasing (fresh winds from the SW on Thu night, light winds from the WSW by Sat morning).

Days 10–12 Weather Summary

Heavy rain (total 34mm), heaviest during Tue night. Freeze-thaw conditions (max 9°C on Tue night, min -8°C on Sun night). Mainly fresh winds.

Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
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
12:34PM0.72m
1:15AM0.62m
1:13PM0.72m
1:55AM0.62m
1:53PM0.73m
2:34AM0.62m
2:33PM0.72m
3:13AM0.62m
3:13PM0.72m
3:53AM0.63m
3:55PM0.71m
4:33AM0.64m
4:40PM0.70m
5:17AM0.66m
5:29PM0.69m
6:05AM0.68m
6:23PM0.68m
6:56AM0.70m
7:21PM0.66m
7:49AM0.73m
8:20PM0.66m
8:45AM0.76m
9:23PM0.66m
Low Tide
6:50PM0.03m
6:51AM0.11m
7:29PM0.02m
7:30AM0.10m
8:08PM0.02m
8:11AM0.10m
8:47PM0.02m
8:53AM0.10m
9:27PM0.02m
9:35AM0.10m
10:08PM0.02m
10:21AM0.09m
10:52PM0.02m
11:12AM0.09m
11:40PM0.03m
12:07PM0.07m
00:30AM0.03m
1:04PM0.05m
1:23AM0.03m
2:03PM0.02m
2:18AM0.03m
3:03PM-0.01m
3:16AM0.03m
Wave
height (m) 
direction
period (s) 
1.2
SSE
5
1.4
S
10
1.3
SSE
11
0.8
SSE
11
0.4
SSE
10
0.8
SSW
4
0.9
WSW
4
0.7
W
3
0.8
WNW
4
0.8
NW
4
0.5
NW
3
0.2
ESE
10
0.4
SSW
3
1
SW
4
0.9
WSW
4
0.6
WNW
3
0.4
NW
3
0.1
S
7
0.2
WSW
2
0.5
WSW
3
0.2
SSW
5
1
WSW
4
0.5
S
8
0.5
W
3
0.2
S
8
0.2
S
8
0.3
N
2
0.8
NNW
4
0.7
NW
4
0.7
WNW
4
0.6
NW
3
0.5
NW
3
0.4
WNW
3
0.5
WSW
3
0.5
SW
3
0.5
S
3
light rain
light rain
part cloud
clear
part cloud
clear
part cloud
clear
clear
clear
clear
part cloud
light rain
rain showers
part cloud
part cloud
cloud
part cloud
clear
part cloud
heavy rain
rain showers
clear
part cloud
cloud
light snow
snow showers
clear
part cloud
clear
clear
part cloud
clear
cloud
light rain
heavy rain
light rain
light rain
some clouds
clear
some clouds
clear
some clouds
clear
clear
clear
clear
some clouds
light rain
rain shwrs
some clouds
some clouds
cloudy
some clouds
clear
some clouds
heavy rain
rain shwrs
clear
some clouds
cloudy
light snow
snow shwrs
clear
some clouds
clear
clear
some clouds
clear
cloudy
light rain
heavy rain
 km/h
40
SSE
40
WSW
45
W
30
W
15
WSW
35
SW
35
WSW
30
WNW
35
WNW
35
NW
20
NW
15
WNW
25
SSW
40
WSW
35
W
30
WNW
25
NW
10
NW
20
WSW
20
WSW
15
S
35
WSW
20
W
25
WNW
10
WNW
10
NNW
20
N
30
NW
30
WNW
30
NW
30
NW
25
NW
20
W
25
WSW
25
WSW
25
SSE
 mm 
5
2
4
5
13
2
1
27
max°C
13
10
2
1
2
7
6
4
-1
-2
0
2
4
4
4
3
3
0
4
4
10
10
10
7
4
3
1
-3
-2
-5
-6
-5
0
3
5
9
Moonrise
7:03
7:55
8:40
9:16
9:46
10:12
10:35
10:56
11:17
11:40
12:06
12:39
Moonset
3:33
4:29
5:31
6:37
7:45
8:52
10:00
11:09
12:19
1:33
2:50
Sunrise
7:03
7:03
7:05
7:05
7:05
7:05
7:05
7:07
7:07
7:07
7:07
7:07
Sunset
4:13
4:14
4:14
4:15
4:15
4:15
4:16
4:16
4:17
4:19
4:19
4:20
Today's sea temperature in Poponesset Island, Poponesset Bay, Nantucket Sound is
4.7° C
(Statistics for 19 Dec 1981-2005 – mean: 8.1 max: 10.8 min: 6.4°C)
Issued (local time): 6 am Friday 19 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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