Nantucket Sea Conditions and Tide Table

Nantucket 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 04:13 PM.

Days 1–3 Weather Summary

Moderate rain (total 10mm), heaviest on Fri morning. Icy conditions (max 13°C on Thu night, min -1°C on Sat morning). 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 5mm), mostly falling on Tue afternoon. Icy conditions (max 7°C on Sun morning, min -4°C on Sun night). Winds increasing (moderate winds from the WNW on Mon night, near gales from the WSW by Tue afternoon).

Days 7–9 Weather Summary

Moderate rain (total 10mm), heaviest on Fri afternoon. Freeze-thaw conditions (max 8°C on Fri afternoon, min -2°C on Wed night). Winds increasing (light winds from the WSW on Thu morning, near gales from the NNW by Fri night).

Days 10–12 Weather Summary

Mostly dry. Freeze-thaw conditions (max 2°C on Mon morning, min -2°C on Sun morning). Winds increasing (light winds from the WNW on Sun morning, strong winds from the NW by Tue morning).

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
10:46AM1.05m
11:42PM0.74m
11:26AM1.06m
00:23AM0.74m
12:06PM1.07m
1:02AM0.74m
12:46PM1.07m
1:41AM0.75m
1:25PM1.07m
2:20AM0.77m
2:05PM1.05m
3:00AM0.79m
2:47PM1.03m
3:42AM0.83m
3:33PM0.99m
4:26AM0.88m
4:24PM0.95m
5:14AM0.94m
5:22PM0.91m
6:05AM1.01m
6:23PM0.87m
6:57AM1.09m
7:25PM0.84m
Low Tide
5:11PM0.05m
4:48AM0.24m
5:48PM0.04m
5:26AM0.23m
6:24PM0.03m
6:05AM0.23m
7:01PM0.03m
7:40PM0.02m
7:28AM0.22m
8:19PM0.02m
8:15AM0.20m
9:00PM0.02m
9:06AM0.18m
9:43PM0.02m
10:00AM0.15m
10:28PM0.02m
10:58AM0.11m
11:15PM0.03m
11:58AM0.06m
00:06AM0.04m
12:59PM0.01m
1:00AM0.04m
Wave
height (m) 
direction
period (s) 
0.9
SSW
8
0.9
SSW
7
1.5
S
6
3
S
8
3.5
S
11
3
S
12
2.3
S
11
1.5
S
10
1.5
S
9
2.3
SSW
8
2
SSW
8
1.8
WSW
6
1.7
WNW
5
1.3
NW
5
0.8
NE
8
0.8
SW
4
2.3
SW
7
1.9
SW
9
1.6
W
6
1.4
NNW
5
1.3
NE
8
0.8
NE
8
0.7
NE
8
0.7
SSE
6
0.5
E
11
0.8
S
4
1.3
SSW
6
1.7
NW
6
1.8
NE
8
1.2
E
8
0.8
ENE
8
0.6
ENE
7
0.6
ENE
7
0.5
S
5
0.4
N
5
0.6
NE
6
clear
clear
rain showers
mod rain
rain showers
part cloud
clear
part cloud
part cloud
clear
clear
part cloud
clear
clear
cloud
light rain
light rain
clear
part cloud
clear
clear
part cloud
part cloud
cloud
light rain
mod rain
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
rain shwrs
mod rain
rain shwrs
some clouds
clear
some clouds
some clouds
clear
clear
some clouds
clear
clear
cloudy
light rain
light rain
clear
some clouds
clear
clear
some clouds
some clouds
cloudy
light rain
mod rain
some clouds
some clouds
clear
clear
clear
some clouds
some clouds
clear
clear
clear
 km/h
15
SSE
25
SSE
35
SSE
80
S
35
W
60
W
45
WNW
15
SW
40
SSW
45
WSW
45
W
50
WNW
50
NW
40
NW
20
WNW
35
SSW
60
WSW
45
WNW
45
NW
40
NNW
30
N
10
WSW
20
SW
20
W
20
SSE
25
SSW
35
W
45
NNW
45
N
25
N
10
NW
15
WNW
20
WNW
20
NNW
15
NNW
25
WNW
 mm 
1
6
3
1
4
2
8
max°C
5
10
13
13
8
3
1
3
8
7
6
0
-2
-1
1
4
5
4
2
1
-1
0
4
4
7
8
7
0
0
0
-2
0
1
2
2
2
Moonrise
6:02
7:01
7:52
8:37
9:14
9:44
10:10
10:33
10:54
11:16
11:39
12:05
Moonset
2:46
3:33
4:29
5:30
6:37
7:44
8:51
9:59
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
4:13
4:13
4:13
4:14
4:14
4:15
4:15
4:15
4:16
4:16
4:17
4:19
Today's sea temperature in Nantucket is
5.7° C
(Statistics for 18 Dec 1981-2005 – mean: 8.8 max: 11.4 min: 6.9°C)
Issued (local time): 6 am Thursday 18 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest