Great Point, Nantucket Island Sea Conditions and Tide Table

Great Point, Nantucket Island 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 07:01 AM and sunset is at 04:12 PM.

Days 1–3 Weather Summary

Light rain (total 8mm), mostly falling on Fri morning. Icy conditions (max 13°C on Thu night, min -1°C on Fri night). Winds increasing (light winds from the SSE on Thu morning, severe gales from the S by Fri morning).

Days 4–6 Weather Summary

Light rain (total 3mm), mostly falling on Tue afternoon. Icy conditions (max 7°C on Sun morning, min -4°C on Sun night). Winds increasing (light winds from the WNW on Mon night, near gales from the WSW by Tue afternoon).

Days 7–9 Weather Summary

Moderate rain (total 11mm), heaviest on Thu night. Freeze-thaw conditions (max 10°C on Thu night, min -4°C on Wed night). Winds increasing (light winds from the WSW on Wed night, near gales from the SW by Thu night).

Days 10–12 Weather Summary

Light rain (total 7mm), mostly falling on Sun night. Mild temperatures (max 6°C on Mon afternoon, min 1°C on Mon night). Winds increasing (light winds from the ESE on Sat night, strong winds from the N by Mon night).

Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
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
10:35AM0.95m
11:15PM0.82m
11:14AM0.96m
11:55PM0.82m
11:53AM0.96m
00:35AM0.82m
12:33PM0.97m
1:14AM0.83m
1:13PM0.96m
1:53AM0.84m
1:53PM0.96m
2:33AM0.84m
2:35PM0.95m
3:13AM0.86m
3:20PM0.94m
3:57AM0.88m
4:09PM0.92m
4:45AM0.90m
5:03PM0.90m
5:36AM0.94m
6:01PM0.89m
6:29AM0.97m
7:00PM0.88m
Low Tide
4:47PM0.05m
4:47AM0.15m
5:26PM0.04m
5:27AM0.14m
6:05PM0.03m
6:06AM0.14m
6:44PM0.02m
6:47AM0.14m
7:23PM0.02m
7:29AM0.13m
8:03PM0.02m
8:11AM0.13m
8:44PM0.02m
8:57AM0.12m
9:28PM0.03m
9:48AM0.11m
10:16PM0.04m
10:43AM0.09m
11:06PM0.04m
11:40AM0.07m
11:59PM0.05m
12:39PM0.03m
00:54AM0.05m
Wave
height (m) 
direction
period (s) 
0.4
SSE
9
0.6
SSE
9
1.2
SSE
5
2
SSE
7
2.4
SE
10
2.3
SE
12
1.6
SE
11
0.9
SE
10
1.1
SE
9
1.5
SW
5
1.3
WSW
5
1.2
WNW
4
1.3
WNW
5
1.4
NNW
5
0.6
NNE
7
0.8
SW
4
1.6
SW
6
1.2
W
5
1.3
WNW
5
1.4
NNW
5
0.9
NE
8
0.6
NE
7
0.7
SW
4
1.1
SSW
5
1.9
SW
6
1.5
SSE
10
0.9
SSE
10
0.7
SSE
10
0.5
SSE
9
0.5
SE
7
0.4
SE
7
0.4
SSE
7
0.4
SE
3
0.5
SE
4
0.4
SE
4
1.2
NE
5
clear
clear
part cloud
light rain
light rain
part cloud
clear
part cloud
part cloud
clear
part cloud
part cloud
part cloud
clear
part cloud
cloud
rain showers
part cloud
clear
clear
clear
clear
cloud
mod rain
light rain
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
mod rain
cloud
cloud
rain showers
clear
clear
some clouds
light rain
light rain
some clouds
clear
some clouds
some clouds
clear
some clouds
some clouds
some clouds
clear
some clouds
cloudy
rain shwrs
some clouds
clear
clear
clear
clear
cloudy
mod rain
light rain
some clouds
some clouds
cloudy
cloudy
cloudy
cloudy
cloudy
mod rain
cloudy
cloudy
rain shwrs
 km/h
10
SSE
20
SSE
40
SSE
65
SSE
60
SW
60
W
45
WNW
15
WSW
40
SSW
45
WSW
45
W
45
WNW
50
NW
50
NNW
15
WNW
35
SW
55
WSW
45
WNW
50
NW
50
NNW
25
NNW
25
SW
30
SW
40
SSW
55
SW
40
WSW
25
WNW
15
N
10
NNE
5
SE
15
SE
15
SSE
20
SE
10
ENE
15
NNW
40
N
 mm 
4
4
3
6
5
6
1
max°C
5
9
13
12
11
3
1
2
8
7
6
-1
-3
-2
0
4
4
4
-2
-2
-3
1
5
10
9
10
7
3
3
3
4
4
5
5
6
4
Moonrise
6:03
7:01
7:53
8:37
9:14
9:44
10:10
10:33
10:54
11:16
11:38
12:05
Moonset
2:45
3:33
4:28
5:30
6:36
7:43
8:51
9:58
11:07
12:17
1:31
Sunrise
7:01
7:01
7:01
7:01
7:03
7:03
7:03
7:03
7:03
7:05
7:05
7:05
Sunset
4:12
4:12
4:13
4:13
4:14
4:14
4:15
4:15
4:15
4:16
4:17
4:17
Today's sea temperature in Great Point, Nantucket Island is
5.6° C
(Statistics for 18 Dec 1981-2005 – mean: 8.6 max: 11.2 min: 6.7°C)
Issued (local time): 12 pm Thursday 18 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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