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 06:58 AM and sunset is at 04:10 PM.

Days 1–3 Weather Summary

Mostly dry. Icy conditions (max 8°C on Wed morning, min -7°C on Mon morning). Winds decreasing (strong winds from the SW on Wed morning, light winds from the NW by Wed night).

Days 4–6 Weather Summary

Moderate rain (total 13mm), heaviest on Fri morning. Icy conditions (max 12°C on Thu night, min -3°C on Fri night). Winds increasing (light winds from the S on Thu morning, severe gales from the SSW by Fri morning).

Days 7–9 Weather Summary

Moderate rain (total 14mm), heaviest on Tue morning. Freeze-thaw conditions (max 9°C on Sun morning, min -5°C on Tue night). Winds increasing (calm on Mon night, gales from the WNW by Tue night).

Days 10–12 Weather Summary

Light rain (total 5mm), mostly falling on Sat morning. Freeze-thaw conditions (max 10°C on Sat morning, min -6°C on Wed morning). Winds increasing (calm on Fri morning, near gales from the SSW by Sat morning).

Monday
15
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
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
8:25AM0.91m
9:02PM0.81m
9:13AM0.92m
9:51PM0.81m
9:55AM0.94m
10:34PM0.82m
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
Low Tide
2:32PM0.11m
2:39AM0.16m
3:23PM0.09m
3:24AM0.16m
4:07PM0.07m
4:06AM0.16m
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
Wave
height (m) 
direction
period (s) 
1.3
NE
8
1.1
WNW
4
0.8
W
4
0.7
W
4
0.7
WSW
4
1
SW
4
1.4
SW
5
1.5
SW
5
1.3
W
5
0.5
SE
10
0.7
SSE
3
1.5
SSE
6
2.2
SSE
7
2.1
SE
11
2.3
SE
12
1.4
SE
11
0.8
SE
10
1
SE
9
1.7
SSW
6
1.3
SSE
8
1.2
W
4
0.9
WNW
4
0.5
NNW
3
0.4
E
11
1.2
SSE
5
1.6
SE
7
1.8
W
5
1.2
WNW
5
0.6
WNW
4
0.6
W
3
0.6
W
3
0.9
WNW
4
0.7
NW
4
0.3
E
9
0.4
NE
6
0.9
SSE
4
part cloud
part cloud
cloud
clear
clear
part cloud
clear
part cloud
clear
clear
clear
part cloud
heavy rain
rain showers
clear
part cloud
part cloud
part cloud
cloud
cloud
clear
clear
cloud
cloud
mod rain
light rain
clear
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
light rain
some clouds
some clouds
cloudy
clear
clear
some clouds
clear
some clouds
clear
clear
clear
some clouds
heavy rain
rain shwrs
clear
some clouds
some clouds
some clouds
cloudy
cloudy
clear
clear
cloudy
cloudy
mod rain
light rain
clear
clear
some clouds
some clouds
clear
clear
clear
clear
some clouds
light rain
 km/h
40
NW
40
WNW
30
W
25
W
30
WSW
40
SW
45
SW
50
SW
45
WNW
10
S
30
SSE
45
S
70
SSE
35
WSW
60
W
30
NW
10
SW
35
SSW
55
SSW
40
WSW
45
W
35
NW
20
NNW
15
SSE
45
SSE
50
WSW
65
WNW
40
NW
25
W
25
WNW
30
WNW
35
WNW
30
NW
5
NE
20
S
35
S
 mm 
11
2
10
4
2
max°C
-4
-3
0
0
1
7
8
8
5
2
8
12
12
7
2
-2
0
7
9
7
5
-1
-1
2
8
9
5
-4
-1
0
0
1
-2
-2
1
9
Moonrise
2:55
3:57
5:01
6:03
7:01
7:53
8:37
9:14
9:44
10:10
10:33
10:54
Moonset
1:09
1:35
2:07
2:45
3:33
4:28
5:30
6:36
7:43
8:51
9:58
11:07
Sunrise
6:58
6:58
7:00
7:01
7:01
7:01
7:01
7:03
7:03
7:03
7:03
7:03
Sunset
4:10
4:10
4:12
4:12
4:12
4:13
4:13
4:14
4:14
4:15
4:15
4:15
Today's sea temperature in Great Point, Nantucket Island is
5.9° C
(Statistics for 15 Dec 1981-2005 – mean: 8.9 max: 11.2 min: 7.3°C)
Issued (local time): 6 am Monday 15 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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