Siasconset, Nantucket Island Sea Conditions and Tide Table

Siasconset, Nantucket Island 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 — and sunset is at 05:12 PM.

Days 1–4 Weather Summary

A dusting of snow. Milder later with heavy rain (total 46mm) on Sun morning. Icy conditions (max 10°C on Sun afternoon, min -6°C on Fri night). Winds increasing (light winds from the WNW on Sat morning, severe gales from the WSW by Sun night).

Days 5–7 Weather Summary

A moderate fall of snow, heaviest on Thu morning. Air temperatures will be below freezing (max -1°C on Mon afternoon, min -8°C on Tue night). Winds decreasing (gales from the W on Mon afternoon, light winds from the NW by Wed night).

Days 8–10 Weather Summary

A dusting of new snow. Freeze-thaw conditions (max 1°C on Fri afternoon, min -5°C on Thu night). Winds decreasing (strong winds from the NW on Thu night, light winds from the W by Sat night).

Days 11–13 Weather Summary

Heavy rain (total 29mm), heaviest during Mon night. Freeze-thaw conditions (max 8°C on Mon night, min 0°C on Sun afternoon). Winds increasing (light winds from the SSW on Sun night, severe gales from the SW by Tue morning).

Fri
14
Saturday
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wed
26
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
Wave Height Map
High Tide
1:06AM0.38m
1:19PM0.40m
1:42AM0.38m
1:59PM0.38m
2:20AM0.38m
2:40PM0.36m
2:59AM0.37m
3:25PM0.34m
3:42AM0.36m
4:13PM0.32m
4:29AM0.35m
5:06PM0.31m
5:21AM0.35m
6:04PM0.30m
6:17AM0.35m
7:04PM0.30m
7:16AM0.36m
8:02PM0.31m
8:12AM0.37m
8:56PM0.33m
9:05AM0.39m
9:46PM0.35m
9:55AM0.41m
Low Tide
6:57PM-0.01m
7:11AM0.02m
7:34PM0.01m
7:52AM0.02m
8:11PM0.02m
8:34AM0.03m
8:50PM0.04m
9:18AM0.04m
9:32PM0.05m
10:06AM0.05m
10:17PM0.07m
10:58AM0.06m
11:08PM0.08m
11:54AM0.07m
00:03AM0.09m
12:53PM0.06m
1:01AM0.09m
1:52PM0.05m
1:59AM0.08m
2:46PM0.03m
2:53AM0.05m
3:36PM0.01m
3:45AM0.03m
Wave
height (m) 
direction
period (s) 
1.5
W
5
0.9
WNW
4
0.5
SW
6
0.4
S
7
0.5
SE
3
1.9
SSE
7
3
SSW
10
3.5
SSW
12
3.5
SSW
12
3
SSW
11
3
SW
10
2.4
WSW
6
2.1
W
6
1.8
W
6
1.2
W
5
0.9
W
4
0.5
WSW
5
0.5
NNE
3
0.9
N
4
1.7
S
10
1.4
S
10
1.2
S
9
0.9
NNW
7
0.8
NW
4
0.6
NNE
6
0.5
S
6
0.3
SSW
6
0.5
WSW
3
0.5
SW
3
0.5
SW
4
0.5
SSW
4
3
SE
8
4
S
12
3.5
S
12
2.5
S
12
2.3
S
11
part cloud
part cloud
part cloud
cloud
light snow
heavy rain
mod rain
part cloud
cloud
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
light snow
mod snow
light snow
cloud
part cloud
clear
clear
clear
part cloud
part cloud
clear
clear
part cloud
cloud
mod rain
heavy rain
cloud
clear
part cloud
part cloud
some clouds
some clouds
some clouds
cloudy
light snow
heavy rain
mod rain
some clouds
cloudy
some clouds
some clouds
clear
clear
clear
some clouds
some clouds
light snow
mod snow
light snow
cloudy
some clouds
clear
clear
clear
some clouds
some clouds
clear
clear
some clouds
cloudy
mod rain
heavy rain
cloudy
clear
some clouds
some clouds
 km/h
45
WNW
30
WNW
10
WNW
15
W
30
ESE
40
SSE
50
SSW
65
WSW
70
W
70
W
65
W
60
WNW
60
WNW
55
WNW
35
WNW
30
WNW
15
WNW
30
NNE
40
NNW
40
WNW
35
NW
35
NW
25
NW
30
NW
20
WNW
15
WNW
10
W
25
WSW
20
SW
20
S
30
E
75
ESE
80
SW
65
WSW
15
WSW
45
WSW
 mm 
5
34
7
8
21
max°C
0
-4
-4
-2
4
8
10
6
-1
-1
-4
-5
-4
-6
-6
-3
-3
-2
-1
-3
0
1
-2
-2
0
-1
-1
1
4
6
5
8
5
6
4
4
Moonrise
7:30
8:31
9:32
10:33
11:36
12:41
1:45
2:47
3:43
4:32
5:13
5:46
Moonset
7:37
7:56
8:14
8:33
8:55
9:20
9:50
10:28
11:16
12:15
1:23
2:37
3:55
Sunrise
6:33
6:33
6:31
6:30
6:28
6:26
6:26
6:24
6:22
6:20
6:20
6:18
Sunset
5:12
5:13
5:15
5:15
5:16
5:17
5:20
5:21
5:22
5:22
5:23
5:24
Today's sea temperature in Siasconset, Nantucket Island is 3.5 °C (Statistics for 14 Feb 1981-2005 – mean: 5.1 max: 6.4 min: 3.8°C)
Issued (local time): 6 pm Friday 14 Feb 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest