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 — and sunset is at 04:13 PM.

Days 1–4 Weather Summary

A dusting of new snow. Icy conditions (max 8°C on Sat night, min -3°C on Sun night). Winds decreasing (strong winds from the SW on Sat night, calm by Tue morning).

Days 5–7 Weather Summary

A dusting of snow giving way to moderate rain (total 11mm) heaviest on Fri morning. Low air temperatures (max 9°C on Fri morning, min 2°C on Tue afternoon). Winds increasing (calm on Wed afternoon, strong winds from the WSW by Fri morning).

Days 8–10 Weather Summary

Light rain (total 4mm), mostly falling on Sun night. Freeze-thaw conditions (max 8°C on Fri afternoon, min -3°C on Sat morning). Winds decreasing (strong winds from the NNW on Fri night, light winds from the ENE by Sat night).

Days 11–13 Weather Summary

Mostly dry. Freeze-thaw conditions (max 5°C on Mon afternoon, min -1°C on Tue morning). Winds decreasing (gales from the NNE on Mon night, light winds from the N by Thu morning).

Sat
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thu
1
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
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
7:25AM1.01m
8:03PM0.88m
8:23AM1.05m
9:03PM0.88m
9:19AM1.08m
Low Tide
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
1:39PM-0.01m
1:52AM0.04m
2:40PM-0.05m
2:48AM0.04m
Wave
height (m) 
direction
period (s) 
1
SE
10
1.2
SE
9
1.4
SW
5
1.2
W
4
1.2
WNW
4
1.1
NW
4
0.9
NW
4
0.5
E
10
0.5
E
10
0.3
E
10
0.4
E
10
1
ENE
6
0.8
ENE
6
0.7
E
7
0.9
E
8
0.8
E
8
0.7
E
10
0.9
ENE
10
1.2
WSW
4
1.3
NNW
4
1.3
NNE
8
1
NE
8
0.7
ENE
7
0.6
ENE
6
0.9
SE
4
1
ESE
5
1.3
E
6
1.6
NE
6
2.1
NE
8
2.3
NE
9
2.4
ENE
11
2.1
ENE
11
1.8
ENE
12
1.7
ENE
14
1.6
ENE
14
1.4
ENE
13
part cloud
part cloud
clear
clear
part cloud
clear
part cloud
snow showers
light snow
light snow
light rain
cloud
part cloud
cloud
part cloud
cloud
cloud
mod rain
part cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
light rain
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
part cloud
clear
some clouds
some clouds
clear
clear
some clouds
clear
some clouds
snow shwrs
light snow
light snow
light rain
cloudy
some clouds
cloudy
some clouds
cloudy
cloudy
mod rain
some clouds
some clouds
some clouds
cloudy
cloudy
cloudy
cloudy
light rain
some clouds
some clouds
some clouds
some clouds
clear
clear
clear
clear
some clouds
clear
 km/h
20
WSW
40
SSW
45
WSW
45
NW
45
WNW
40
NW
35
NW
20
WNW
20
WSW
15
ENE
15
NE
25
NE
10
NNE
15
SW
30
WSW
25
SW
20
SW
30
SSW
35
W
45
NNW
35
NNE
20
NE
10
ENE
25
SE
35
SE
30
ESE
40
NE
50
NNE
60
NNE
60
NNE
55
NNE
40
NNE
35
N
30
N
15
N
15
N
 mm 
1
2
8
4
max°C
2
8
7
3
0
-1
0
3
2
3
3
3
3
5
6
7
7
9
8
3
-3
-3
-1
2
3
6
6
5
3
-1
0
-1
0
1
2
3
Moonrise
8:37
9:14
9:44
10:10
10:33
10:54
11:16
11:38
12:05
12:37
1:19
2:13
Moonset
4:28
5:30
6:36
7:43
8:51
9:58
11:07
12:17
1:31
2:48
4:08
5:27
Sunrise
7:01
7:03
7:03
7:03
7:03
7:03
7:05
7:05
7:05
7:05
7:05
7:05
Sunset
4:13
4:13
4:14
4:14
4:15
4:15
4:15
4:16
4:17
4:17
4:19
4:20
Today's sea temperature in Great Point, Nantucket Island is
5.3° C
(Statistics for 20 Dec 1981-2005 – mean: 8.4 max: 10.0 min: 6.7°C)
Issued (local time): 6 pm Saturday 20 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest