Wychmere Harbor, Nantucket Sound Sea Conditions and Tide Table

Wychmere Harbor, 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 07:01 AM and sunset is at 04:10 PM.

Days 1–3 Weather Summary

Light rain (total 7mm), mostly falling on Fri afternoon. Icy conditions (max 13°C on Fri morning, min -1°C on Fri night). Winds increasing (light winds from the SSE on Thu morning, gales from the S by Fri morning).

Days 4–6 Weather Summary

Light rain (total 2mm), mostly falling on Tue afternoon. Icy conditions (max 7°C on Sun morning, min -4°C on Mon night). Mainly strong winds.

Days 7–9 Weather Summary

Moderate rain (total 12mm), heaviest on Fri morning. Freeze-thaw conditions (max 10°C on Fri afternoon, min -4°C on Wed night). Winds decreasing (strong winds from the NW on Wed morning, light winds from the WSW by Wed night).

Days 10–12 Weather Summary

Light rain (total 7mm), mostly falling on Sun night. Mild temperatures (max 5°C on Sun night, min 1°C on Mon night). Winds increasing (calm on Mon morning, 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
10:44AM1.16m
11:24PM1.00m
11:23AM1.17m
00:04AM1.00m
12:02PM1.18m
00:44AM1.01m
12:42PM1.18m
1:23AM1.01m
1:22PM1.18m
2:02AM1.01m
2:02PM1.17m
2:42AM1.03m
2:44PM1.16m
3:22AM1.05m
3:29PM1.14m
4:06AM1.07m
4:18PM1.12m
4:54AM1.10m
5:12PM1.10m
5:45AM1.14m
6:10PM1.08m
6:38AM1.18m
7:09PM1.07m
Low Tide
4:44PM0.06m
4:44AM0.18m
5:23PM0.05m
5:24AM0.17m
6:02PM0.04m
6:03AM0.17m
6:41PM0.03m
6:44AM0.16m
7:20PM0.02m
7:26AM0.16m
8:00PM0.02m
8:08AM0.16m
8:41PM0.03m
8:54AM0.15m
9:25PM0.03m
9:45AM0.14m
10:13PM0.04m
10:40AM0.11m
11:03PM0.05m
11:37AM0.08m
11:56PM0.06m
12:36PM0.04m
00:51AM0.06m
Wave
height (m) 
direction
period (s) 
0.3
SE
9
0.4
SSE
3
0.9
SSE
4
1.5
SE
7
1.7
SE
10
1.4
SE
12
1.2
ESE
12
0.6
SE
11
0.8
ESE
10
1
S
6
0.9
SSW
6
0.9
NNE
6
1.3
NNW
4
1.1
NNW
4
0.5
NE
7
0.6
SW
3
1.1
SW
5
0.9
WNW
4
1.2
NNW
4
1.1
N
4
0.7
NE
7
0.5
NE
7
0.6
SW
3
0.8
S
4
1.3
SSW
5
0.9
S
6
0.8
NE
6
0.5
E
6
0.5
E
7
0.4
E
6
0.3
E
6
0.3
SE
4
0.4
SE
3
0.4
SE
4
0.3
ESE
4
1.1
NE
6
clear
clear
rain showers
light rain
light rain
part cloud
clear
part cloud
part cloud
clear
part cloud
cloud
part cloud
clear
part cloud
cloud
rain showers
part cloud
part cloud
clear
clear
clear
part cloud
light rain
mod rain
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
light rain
cloud
light rain
light rain
clear
clear
rain shwrs
light rain
light rain
some clouds
clear
some clouds
some clouds
clear
some clouds
cloudy
some clouds
clear
some clouds
cloudy
rain shwrs
some clouds
some clouds
clear
clear
clear
some clouds
light rain
mod rain
some clouds
some clouds
cloudy
cloudy
cloudy
cloudy
cloudy
light rain
cloudy
light rain
light rain
 km/h
10
SSE
20
S
35
S
55
SSE
55
SW
45
W
35
WNW
10
WSW
35
SSW
35
WSW
30
WNW
40
WNW
45
NW
45
NNW
15
WNW
30
SW
45
WSW
35
W
50
NW
40
NNW
20
NNW
20
SW
25
SW
35
SSW
45
SW
30
WSW
25
WNW
15
N
10
ENE
5
SE
15
SSE
15
SSE
15
SE
0
ENE
15
NNW
40
N
 mm 
1
3
3
2
5
7
5
1
1
max°C
5
8
12
13
12
3
1
2
8
7
4
-1
-3
-3
-1
4
3
3
-2
-2
-3
0
4
9
9
10
7
3
3
3
4
4
5
5
5
4
Moonrise
6:04
7:02
7:54
8:38
9:15
9:45
10:10
10:33
10:54
11:16
11:38
12:04
Moonset
2:44
3:31
4:27
5:29
6:35
7:43
8:50
9:58
11:07
12:17
1:31
Sunrise
7:01
7:01
7:03
7:03
7:03
7:03
7:05
7:05
7:05
7:05
7:05
7:05
Sunset
4:10
4:12
4:12
4:12
4:13
4:14
4:14
4:15
4:15
4:15
4:16
4:17
Today's sea temperature in Wychmere Harbor, Nantucket Sound is
5.9° C
(Statistics for 18 Dec 1981-2005 – mean: 8.0 max: 10.5 min: 6.2°C)
Issued (local time): 12 pm Thursday 18 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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