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 06:47 AM and sunset is at 06:49 PM.

Days 1–3 Weather Summary

Mostly dry. Icy conditions (max 7°C on Fri night, min -3°C on Wed morning). Wind will be generally light.

Days 4–6 Weather Summary

Moderate rain (total 11mm), heaviest on Mon morning. Icy conditions (max 9°C on Sat afternoon, min 0°C on Mon night). Winds increasing (light winds from the NNE on Sun afternoon, strong winds from the NE by Mon afternoon).

Days 7–9 Weather Summary

Mostly dry. Freeze-thaw conditions (max 11°C on Thu night, min -2°C on Tue afternoon). Winds increasing (light winds from the NNE on Thu morning, strong winds from the S by Thu night).

Days 10–12 Weather Summary

Moderate rain (total 19mm), heaviest on Sat afternoon giving way to a moderate fall of snow, heaviest on Sun morning. Freeze-thaw conditions (max 13°C on Fri afternoon, min -4°C on Sun night). Mainly near gales.

Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Wednesday
25
Thursday
26
Friday
27
Saturday
28
Sunday
29
Monday
30
Tuesday
31
Wednesday
1
Thu
2
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
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
Wave Height Map
High Tide
12:22PM1.23m
00:44AM1.21m
1:06PM1.25m
1:25AM1.26m
1:50PM1.25m
2:07AM1.30m
2:36PM1.23m
2:51AM1.32m
3:24PM1.19m
3:38AM1.31m
4:15PM1.14m
4:29AM1.28m
5:11PM1.09m
5:27AM1.23m
6:15PM1.04m
6:32AM1.19m
7:23PM1.01m
7:41AM1.16m
8:34PM1.02m
8:53AM1.15m
9:42PM1.05m
10:01AM1.16m
10:41PM1.11m
11:00AM1.18m
11:30PM1.16m
11:50AM1.20m
00:13AM1.19m
12:35PM1.20m
Low Tide
5:45AM-0.00m
6:08PM-0.04m
6:28AM-0.06m
6:49PM-0.06m
7:13AM-0.11m
7:31PM-0.07m
7:59AM-0.14m
8:15PM-0.06m
8:47AM-0.13m
9:01PM-0.03m
9:37AM-0.10m
9:51PM0.02m
10:33AM-0.05m
10:47PM0.08m
11:34AM-0.00m
11:49PM0.13m
12:40PM0.04m
00:55AM0.16m
1:46PM0.06m
2:03AM0.16m
2:52PM0.05m
3:11AM0.12m
3:54PM0.03m
4:12AM0.08m
4:47PM0.01m
5:05AM0.03m
5:32PM0.00m
5:53AM-0.01m
6:14PM0.01m
Wave
height (m) 
direction
period (s) 
0.8
ESE
10
0.6
ESE
10
0.5
ESE
9
0.5
ESE
9
0.4
ESE
9
0.4
ESE
8
0.4
ESE
8
0.6
E
8
0.7
E
9
0.7
E
8
0.7
E
8
0.5
E
8
0.5
E
8
0.5
E
8
0.8
E
6
1.5
E
6
1.6
ENE
8
1.5
ENE
9
1.2
ENE
9
1.1
E
9
0.8
ENE
9
0.7
E
9
0.7
SE
5
0.5
NNE
5
0.3
NE
6
0.6
SSE
3
1.2
S
5
1.2
S
5
1.1
SSE
5
1.3
SSE
5
1.1
SE
9
1
SE
10
1
ESE
10
1.2
ESE
11
1.3
ESE
11
0.9
ESE
11
0.8
ESE
10
0.7
ESE
10
0.5
E
9
0.5
E
9
0.5
E
9
0.5
E
9
0.8
E
9
0.9
E
9
0.6
E
9
0.4
E
9
0.4
E
9
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
cloud
part cloud
cloud
part cloud
part cloud
light rain
mod rain
light rain
cloud
cloud
part cloud
clear
part cloud
part cloud
clear
part cloud
cloud
part cloud
part cloud
clear
rain showers
light rain
mod rain
mod snow
mod snow
part cloud
clear
clear
part cloud
clear
part cloud
part cloud
clear
part cloud
cloud
light rain
mod rain
light rain
some clouds
cloudy
some clouds
some clouds
some clouds
some clouds
clear
clear
some clouds
cloudy
some clouds
cloudy
some clouds
some clouds
light rain
mod rain
light rain
cloudy
cloudy
some clouds
clear
some clouds
some clouds
clear
some clouds
cloudy
some clouds
some clouds
clear
rain shwrs
light rain
mod rain
mod snow
mod snow
some clouds
clear
clear
some clouds
clear
some clouds
some clouds
clear
some clouds
cloudy
light rain
mod rain
light rain
 km/h
20
WNW
10
SSE
10
SSE
15
SE
15
SSE
15
SW
20
SW
25
SSW
25
S
25
S
20
SSW
15
NW
20
N
20
E
25
SE
40
ENE
45
NE
35
NNE
30
N
25
N
20
NW
30
WSW
25
WSW
20
NW
10
SE
25
SSE
45
SSW
45
SSW
40
SSW
45
S
10
W
15
NNW
25
NW
30
W
35
W
25
WNW
20
NW
20
N
15
NNE
10
NE
10
S
20
SW
30
SW
30
SW
25
SW
5
SW
15
SW
 mm 
2
7
2
1
4
8
6
2
8
3
max°C
-2
0
0
1
1
2
4
5
7
8
9
8
5
5
3
4
2
1
-1
-1
1
1
6
5
1
5
11
12
13
12
13
4
4
0
1
0
-4
-2
-1
-1
-1
1
3
5
6
6
6
Moonrise
6:29
6:51
7:14
7:41
8:13
8:53
9:44
10:46
11:56
1:11
2:25
3:37
4:46
5:53
6:58
8:03
Moonset
6:40
7:53
9:09
10:27
11:47
1:03
2:11
3:07
3:51
4:26
4:53
5:17
5:38
5:58
6:18
Sunrise
6:47
6:46
6:43
6:41
6:41
6:39
6:37
6:35
6:33
6:31
6:30
6:28
6:26
6:24
6:24
6:22
Sunset
6:49
6:50
6:51
6:52
6:53
6:54
6:55
6:57
6:58
6:59
7:00
7:00
7:01
7:02
7:05
7:06
Today's sea temperature in Wychmere Harbor, Nantucket Sound is
3.6° C
(Statistics for 18 Mar 1981-2005 – mean: 4.3 max: 5.9 min: 2.8°C)
Issued (local time): 1 am Wednesday 18 Mar 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest