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 04:12 PM.

Days 1–3 Weather Summary

Moderate rain (total 14mm), heaviest on Fri afternoon. Icy conditions (max 12°C on Thu night, min -1°C on Fri night). Winds decreasing (gales from the S on Fri morning, light winds from the WSW by Sat afternoon).

Days 4–6 Weather Summary

Light rain (total 8mm), mostly falling on Tue afternoon. Icy conditions (max 4°C on Tue afternoon, min -4°C on Mon night). Winds decreasing (strong winds from the NW on Mon morning, light winds from the WSW by Mon night).

Days 7–9 Weather Summary

Light rain (total 7mm), mostly falling on Thu night. Freeze-thaw conditions (max 11°C on Fri afternoon, min 0°C on Wed night). Mainly strong winds.

Days 10–12 Weather Summary

A dusting of new snow. Freeze-thaw conditions (max 4°C on Sat night, min 0°C on Sun night). Winds increasing (light winds from the N on Sat night, near gales from the NE by Tue night).

Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tue
30
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
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
7:34AM1.23m
Low Tide
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
1:36PM-0.01m
Wave
height (m) 
direction
period (s) 
1.2
SE
7
1.5
SE
10
1.4
SE
12
1.1
SE
11
0.6
ESE
10
0.9
SSE
5
0.9
S
6
0.9
SW
6
0.9
NNE
6
1.2
NNW
4
1
NNW
4
0.6
NNE
6
0.5
SW
3
0.8
SSW
4
0.7
WNW
3
0.9
NW
4
0.7
N
4
0.4
NE
6
0.6
SSW
3
0.6
SW
4
0.3
ENE
8
1.1
SSW
4
1
S
6
0.8
SW
6
0.5
ENE
7
0.5
NE
5
0.4
NE
4
0.7
NE
5
0.8
NE
6
0.8
NE
7
0.6
NE
7
0.5
NE
6
0.8
ENE
4
1.5
ENE
6
1.8
ENE
8
light rain
rain showers
rain showers
clear
cloud
part cloud
clear
part cloud
part cloud
clear
clear
part cloud
light rain
mod rain
clear
part cloud
clear
part cloud
cloud
light rain
light rain
light rain
part cloud
clear
part cloud
clear
part cloud
part cloud
clear
part cloud
cloud
cloud
light snow
light snow
cloud
light rain
rain shwrs
rain shwrs
clear
cloudy
some clouds
clear
some clouds
some clouds
clear
clear
some clouds
light rain
mod rain
clear
some clouds
clear
some clouds
cloudy
light rain
light rain
light rain
some clouds
clear
some clouds
clear
some clouds
some clouds
clear
some clouds
cloudy
cloudy
light snow
light snow
cloudy
 km/h
40
SSE
45
SSW
45
W
30
W
15
WSW
35
SSW
30
WSW
35
WNW
35
WNW
45
NW
40
NW
15
WNW
25
SSW
35
SSW
35
WNW
35
NW
25
NNW
10
WNW
30
SW
25
SW
5
S
40
SW
40
WSW
25
WNW
20
WNW
15
NNW
20
NW
25
NNE
25
N
25
NNE
15
NNE
15
ENE
30
ENE
50
NE
55
NE
 mm 
5
6
3
1
7
1
4
2
max°C
12
11
4
1
2
8
7
4
-1
-2
-1
-1
3
4
2
3
4
2
4
6
9
10
11
6
4
4
4
2
2
1
1
1
1
2
2
Moonrise
7:02
7:54
8:38
9:15
9:45
10:10
10:33
10:54
11:16
11:38
12:04
12:37
Moonset
3:31
4:27
5:29
6:35
7:43
8:50
9:58
11:07
12:17
1:31
2:49
Sunrise
7:01
7:03
7:03
7:03
7:03
7:05
7:05
7:05
7:05
7:05
7:05
7:05
Sunset
4:12
4:12
4:12
4:13
4:14
4:14
4:15
4:15
4:15
4:16
4:17
4:17
Today's sea temperature in Wychmere Harbor, Nantucket Sound is
6.1° C
(Statistics for 19 Dec 1981-2005 – mean: 7.9 max: 10.5 min: 6.2°C)
Issued (local time): 12 am Friday 19 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest