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 06:50 AM and sunset is at 06:46 PM.

Days 1–3 Weather Summary

Heavy rain (total 59mm), heaviest during Mon afternoon. Cool air temperatures (max 12°C on Sun afternoon, min 3°C on Tue morning). Mainly strong winds.

Days 4–6 Weather Summary

Moderate rain (total 11mm), heaviest on Thu night. Low air temperatures (max 8°C on Thu afternoon, min 2°C on Fri night). Winds increasing (light winds from the SSE on Thu night, strong winds from the NW by Fri night).

Days 7–9 Weather Summary

Light rain (total 9mm), mostly falling on Mon night. Very mild (max 10°C on Sun afternoon, min 2°C on Sat morning). Winds decreasing (strong winds from the NW on Sat morning, light winds from the WSW by Sun night).

Days 10–12 Weather Summary

Heavy rain (total 58mm), heaviest during Fri morning. Very mild (max 11°C on Thu night, min 4°C on Wed night). Winds increasing (light winds from the SW on Thu morning, near gales from the SSE by Thu night).

Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
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
2:30PM1.12m
2:42AM1.15m
3:07PM1.09m
3:17AM1.14m
3:46PM1.05m
3:55AM1.12m
4:27PM1.00m
4:35AM1.09m
5:12PM0.96m
5:21AM1.07m
6:03PM0.92m
6:13AM1.05m
7:00PM0.90m
7:10AM1.05m
7:58PM0.91m
8:09AM1.07m
8:57PM0.95m
9:10AM1.12m
9:53PM1.02m
10:07AM1.18m
10:43PM1.11m
11:00AM1.24m
11:29PM1.20m
Low Tide
7:50AM0.02m
8:06PM0.07m
8:28AM0.04m
8:42PM0.11m
9:06AM0.06m
9:19PM0.15m
9:48AM0.09m
9:59PM0.19m
10:33AM0.13m
10:43PM0.23m
11:24AM0.16m
11:34PM0.26m
12:19PM0.17m
00:30AM0.27m
1:16PM0.17m
1:28AM0.25m
2:13PM0.14m
2:27AM0.21m
3:10PM0.09m
3:26AM0.13m
4:03PM0.02m
4:20AM0.04m
4:51PM-0.04m
Wave
height (m) 
direction
period (s) 
0.6
E
10
0.8
S
4
1.2
SSE
5
1.5
SE
8
1.3
SE
10
1.1
SE
10
1.3
ENE
8
1.2
E
8
1
ESE
10
0.9
ESE
9
0.8
ESE
9
0.8
ESE
9
0.9
E
11
0.9
E
11
0.9
E
10
1
E
10
1.1
E
10
1.3
NE
8
1.2
NE
8
0.8
NE
7
0.7
NE
8
0.5
N
5
0.4
SSE
5
0.3
ENE
11
0.3
ENE
10
0.4
ENE
10
0.6
E
6
0.5
ESE
8
0.7
ESE
9
0.6
SE
9
0.8
SSW
5
0.6
SE
8
0.5
SE
8
0.4
SE
8
0.6
SE
4
1.5
ESE
8
cloud
cloud
cloud
heavy rain
heavy rain
heavy rain
light rain
cloud
part cloud
cloud
cloud
cloud
cloud
cloud
mod rain
light rain
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
mod rain
cloud
clear
clear
part cloud
part cloud
part cloud
cloud
mod rain
heavy rain
cloudy
cloudy
cloudy
heavy rain
heavy rain
heavy rain
light rain
cloudy
some clouds
cloudy
cloudy
cloudy
cloudy
cloudy
mod rain
light rain
some clouds
some clouds
clear
clear
clear
clear
clear
clear
clear
some clouds
mod rain
cloudy
clear
clear
some clouds
some clouds
some clouds
cloudy
mod rain
heavy rain
 km/h
25
SSW
30
S
45
S
45
S
30
SSW
35
N
35
NNE
35
NNE
30
NNE
25
NNE
15
NE
15
ESE
20
SSE
20
SE
15
SSE
30
WNW
40
NW
50
NW
45
NW
25
NNW
25
NW
20
W
20
WSW
15
W
15
W
15
SSW
15
SW
10
WSW
25
SW
25
SW
30
W
25
W
15
WNW
10
S
25
SE
45
SSE
 mm 
12
21
23
3
7
4
9
7
31
max°C
11
12
12
11
10
9
4
4
4
3
4
5
6
8
8
7
6
4
3
8
6
5
10
10
8
10
8
8
10
8
7
9
9
6
7
11
Moonrise
9:24
10:26
11:30
12:35
1:37
2:35
3:26
4:09
4:44
5:14
5:40
Moonset
7:38
7:58
8:21
8:49
9:23
10:06
10:59
12:02
1:12
2:26
3:43
5:00
Sunrise
6:50
6:48
6:47
6:46
6:43
6:41
6:41
6:39
6:37
6:35
6:33
6:31
Sunset
6:46
6:47
6:49
6:50
6:51
6:52
6:53
6:54
6:55
6:57
6:58
6:59
Today's sea temperature in Wychmere Harbor, Nantucket Sound is 3.7 °C (Statistics for 16 Mar 1981-2005 – mean: 4.3 max: 5.9 min: 2.3°C)
Issued (local time): 1 am Sunday 16 Mar 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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