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 05:07 AM and sunset is at 08:15 PM.

Days 1–3 Weather Summary

Light rain (total 3mm), mostly falling on Fri morning. Warm air temperatures (max 22°C on Wed night, min 18°C on Wed morning). Winds increasing (light winds from the WNW on Thu morning, fresh winds from the SW by Fri afternoon).

Days 4–6 Weather Summary

Some drizzle, heaviest during Sat afternoon. Warm air temperatures (max 20°C on Mon afternoon, min 16°C on Sat night). Wind will be generally light.

Days 7–9 Weather Summary

Light rain (total 2mm), mostly falling on Wed night. Warm (max 27°C on Thu afternoon, min 19°C on Tue night). Winds decreasing (strong winds from the SW on Wed morning, light winds from the SW by Wed night).

Days 10–12 Weather Summary

Mostly dry. Warm (max 26°C on Fri afternoon, min 16°C on Sat morning). Winds decreasing (strong winds from the NNE on Fri night, calm by Sat night).

Days 13–16 Weather Summary

Heavy rain (total 23mm), heaviest during Thu morning. Warm (max 26°C on Wed afternoon, min 19°C on Mon morning). Winds decreasing (fresh winds from the WSW on Mon morning, light winds from the E by Tue afternoon).

Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
1
Thursday
2
Friday
3
Saturday
4
Sunday
5
Monday
6
Tuesday
7
Wednesday
8
Thu
9
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
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
High Tide
8:10AM0.34m
8:32PM0.38m
9:08AM0.34m
9:21PM0.39m
10:01AM0.33m
10:08PM0.39m
10:50AM0.34m
10:53PM0.39m
11:35AM0.34m
11:35PM0.40m
12:17PM0.34m
00:16AM0.40m
12:56PM0.34m
00:56AM0.40m
1:35PM0.35m
1:35AM0.40m
2:13PM0.35m
2:15AM0.40m
2:52PM0.36m
2:55AM0.40m
3:31PM0.36m
3:37AM0.39m
4:11PM0.37m
4:23AM0.38m
4:55PM0.38m
5:12AM0.37m
5:41PM0.39m
6:05AM0.37m
6:31PM0.40m
Low Tide
2:13PM0.06m
3:00AM0.04m
3:04PM0.07m
3:54AM0.04m
3:53PM0.07m
4:42AM0.03m
4:39PM0.07m
5:26AM0.03m
5:23PM0.07m
6:06AM0.02m
6:05PM0.07m
6:46AM0.02m
6:46PM0.06m
7:24AM0.02m
7:27PM0.06m
8:02AM0.01m
8:08PM0.05m
8:41AM0.01m
8:50PM0.05m
9:20AM0.01m
9:34PM0.05m
10:01AM0.02m
10:20PM0.05m
10:44AM0.02m
11:09PM0.04m
11:30AM0.02m
00:02AM0.03m
12:20PM0.03m
Wave
Height (m)
Direction
Period (s)
0.9
SSE
7
0.9
SSE
7
1.2
S
8
0.8
S
8
0.7
S
7
0.7
S
7
0.8
S
5
0.9
SSW
5
0.7
S
6
0.6
SSE
6
0.5
S
6
0.6
S
6
0.7
S
7
0.7
S
6
0.6
S
6
0.4
SSE
8
0.4
SSE
8
0.5
SE
10
0.6
S
5
0.9
SW
4
1.3
SSW
5
1.6
SW
6
1.6
SW
6
1.2
SSW
6
0.8
SSW
6
0.8
SSW
6
0.7
SSW
5
0.6
SSW
5
0.7
SSW
5
1.5
NNE
5
1.2
NE
6
1
NE
6
0.5
E
6
0.5
S
6
0.6
WSW
3
0.9
WSW
4
0.9
WSW
4
1
SW
5
1.1
SW
5
0.7
SW
6
0.7
SSW
6
0.7
SSW
5
0.6
SSE
7
0.9
SW
4
0.8
SSW
6
0.9
SSW
6
1
SSW
6
clear
clear
clear
clear
part cloud
part cloud
light rain
light rain
cloud
cloud
rain showers
part cloud
clear
clear
clear
part cloud
clear
clear
part cloud
clear
part cloud
clear
clear
rain showers
clear
clear
clear
part cloud
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
part cloud
rain showers
mod rain
rain showers
clear
clear
clear
clear
some clouds
some clouds
light rain
light rain
cloudy
cloudy
rain shwrs
some clouds
clear
clear
clear
some clouds
clear
clear
some clouds
clear
some clouds
clear
clear
rain shwrs
clear
clear
clear
some clouds
some clouds
some clouds
clear
clear
clear
some clouds
some clouds
clear
some clouds
some clouds
some clouds
some clouds
clear
clear
some clouds
some clouds
rain shwrs
mod rain
rain shwrs
km/h
15
W
15
SSW
20
NW
10
SW
15
SW
20
SW
35
S
30
SW
20
SW
10
S
10
E
15
NNE
15
NE
15
E
5
W
5
ESE
15
SSW
20
SW
25
SSW
35
SSW
40
SW
45
SW
40
SW
20
WSW
5
WSW
20
SSW
15
WNW
15
WSW
20
WSW
45
NNE
35
NNE
25
NNE
5
WSW
15
W
30
SW
35
WSW
35
WSW
35
SW
35
WSW
10
N
10
E
20
S
15
WSW
30
SW
10
SSE
20
SW
20
SSW
 mm
2
1
1
2
3
8
11
max °C
19
21
22
21
22
22
19
19
20
19
19
19
17
18
19
19
20
20
20
20
20
19
20
26
25
27
27
25
26
24
16
17
19
20
22
20
19
20
22
24
22
22
24
26
22
21
21
Moonrise
3:45
4:49
5:52
6:51
7:46
8:33
9:13
9:45
10:13
10:37
10:58
11:19
11:40
12:04
12:31
Moonset
1:17
1:42
2:11
2:47
3:30
4:21
5:18
6:21
7:25
8:30
9:35
10:40
11:46
12:54
2:06
3:22
Sunrise
5:07
5:07
5:07
5:07
5:07
5:09
5:09
5:09
5:09
5:11
5:11
5:11
5:13
5:13
5:13
5:15
Sunset
8:15
8:15
8:15
8:15
8:15
8:15
8:15
8:15
8:15
8:15
8:15
8:15
8:15
8:15
8:15
8:14
Today's sea temperature in Siasconset, Nantucket Island is
16.0° C
(Statistics for 24 Jun 1981-2005 – mean: 16.9 max: 20.0 min: 15.5°C)
Issued (local time): 1 am Wednesday 24 Jun 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest