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 05:39 AM and sunset is at 07:34 PM.

Days 1–3 Weather Summary

Light rain (total 7mm), mostly falling on Wed night. Cool air temperatures (max 12°C on Fri night, min 6°C on Wed morning). Winds increasing (calm on Thu morning, fresh winds from the W by Fri afternoon).

Days 4–6 Weather Summary

Mostly dry. Cool air temperatures (max 11°C on Mon afternoon, min 8°C on Sat morning). Winds increasing (light winds from the WSW on Sat morning, strong winds from the WSW by Sun afternoon).

Days 7–9 Weather Summary

Moderate rain (total 19mm), heaviest on Tue night. Very mild (max 14°C on Tue night, min 9°C on Wed afternoon). Mainly near gales.

Days 10–12 Weather Summary

Some drizzle, heaviest during Sun morning. Very mild (max 14°C on Fri night, min 9°C on Sun night). Winds increasing (light winds from the WSW on Sat night, strong winds from the WSW by Sun afternoon).

Wednesday
29
Thursday
30
Friday
1
Saturday
2
Sunday
3
Monday
4
Tuesday
5
Wednesday
6
Thursday
7
Friday
8
Saturday
9
Sunday
10
Monday
11
Tuesday
12
Wednesday
13
Thu
14
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
10:55AM0.38m
11:11PM0.41m
11:40AM0.38m
11:50PM0.41m
12:21PM0.37m
00:27AM0.41m
1:00PM0.37m
1:03AM0.41m
1:39PM0.36m
1:41AM0.41m
2:18PM0.35m
2:20AM0.40m
2:59PM0.34m
3:02AM0.39m
3:43PM0.34m
3:46AM0.38m
4:30PM0.33m
4:34AM0.37m
5:19PM0.33m
5:26AM0.36m
6:10PM0.33m
6:20AM0.36m
7:01PM0.34m
7:15AM0.36m
7:52PM0.36m
8:11AM0.37m
8:41PM0.38m
9:05AM0.38m
Low Tide
4:59PM0.03m
5:30AM0.01m
5:40PM0.03m
6:11AM-0.00m
6:18PM0.03m
6:50AM-0.00m
6:56PM0.04m
7:29AM0.00m
7:35PM0.05m
8:08AM0.01m
8:14PM0.06m
8:49AM0.02m
8:56PM0.07m
9:32AM0.03m
9:40PM0.08m
10:17AM0.04m
10:27PM0.08m
11:05AM0.05m
11:18PM0.09m
11:55AM0.05m
00:12AM0.09m
12:47PM0.05m
1:09AM0.08m
1:38PM0.05m
2:05AM0.06m
2:30PM0.04m
3:00AM0.03m
3:20PM0.02m
Wave
height (m) 
direction
period (s) 
1.6
E
10
1.5
E
10
1.6
ESE
10
1.4
ESE
10
1.2
ESE
10
1
ESE
10
1
ESE
9
1.3
ESE
9
1.2
ESE
9
0.9
ESE
10
1
E
10
0.9
E
10
0.7
E
9
1.2
WSW
4
1.2
SSE
9
1
SSE
8
1
SSE
8
1.2
SSW
4
2
SSW
6
2.3
SSW
8
2.3
SSW
8
1.3
SSW
8
1.1
SSW
8
0.9
SSW
7
1
S
6
1.4
S
6
1.6
S
7
1.5
S
8
1.7
S
8
1.2
S
7
0.9
S
7
1.1
SW
5
0.9
S
6
0.9
SSW
6
1.4
SW
5
1
W
4
0.8
WSW
4
0.9
WSW
4
0.5
SE
11
0.8
NNE
4
1.1
NE
5
0.9
ENE
6
1.1
NE
5
0.7
ENE
5
0.4
ESE
10
0.5
SE
8
0.4
ESE
10
part cloud
cloud
light rain
light rain
light rain
part cloud
clear
clear
clear
clear
cloud
part cloud
clear
clear
clear
clear
clear
clear
cloud
rain showers
mod rain
light rain
light rain
cloud
light rain
light rain
light rain
clear
clear
clear
part cloud
part cloud
part cloud
rain showers
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
some clouds
cloudy
light rain
light rain
light rain
some clouds
clear
clear
clear
clear
cloudy
some clouds
clear
clear
clear
clear
clear
clear
cloudy
rain shwrs
mod rain
light rain
light rain
cloudy
light rain
light rain
light rain
clear
clear
clear
some clouds
some clouds
some clouds
rain shwrs
clear
clear
clear
clear
clear
clear
some clouds
some clouds
clear
clear
clear
clear
clear
 km/h
30
NNE
15
E
20
SE
5
SSW
10
SW
15
WNW
20
W
35
W
30
WNW
15
WSW
35
SSW
15
W
20
WNW
45
WSW
25
WNW
25
SW
30
SW
35
SSW
55
S
55
SSW
50
SW
5
WSW
10
SE
15
SSW
35
S
35
S
30
SSW
30
W
40
WSW
35
WNW
30
WSW
30
WSW
25
WSW
25
WNW
45
WSW
30
WNW
30
W
30
WSW
5
NE
30
NNE
35
NE
30
NE
30
NE
15
ENE
5
NW
0
SSE
10
SSW
 mm 
2
2
3
1
10
1
2
1
2
2
1
max°C
7
9
10
10
10
11
10
11
12
9
10
10
9
10
10
10
11
11
13
13
14
12
10
12
13
12
13
11
12
14
11
11
11
10
12
12
10
11
12
9
7
7
7
7
9
10
11
Moonrise
5:52
6:56
8:01
9:05
10:06
11:03
11:54
12:36
1:11
1:41
2:07
2:30
2:52
3:14
3:38
Moonset
4:23
4:45
5:09
5:36
6:09
6:49
7:37
8:32
9:32
10:37
11:42
12:49
1:56
3:05
4:17
5:33
Sunrise
5:39
5:39
5:37
5:35
5:35
5:33
5:31
5:31
5:30
5:28
5:28
5:26
5:24
5:24
5:22
5:22
Sunset
7:34
7:35
7:36
7:37
7:37
7:38
7:39
7:40
7:43
7:44
7:45
7:45
7:46
7:47
7:49
7:50
Today's sea temperature in Siasconset, Nantucket Island is
7.1° C
(Statistics for 29 Apr 1981-2005 – mean: 8.3 max: 10.1 min: 6.5°C)
Issued (local time): 1 am Wednesday 29 Apr 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest