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 07:58 PM.

Days 1–4 Weather Summary

Light rain (total 2mm), mostly falling on Sat morning. Cool air temperatures (max 12°C on Fri night, min 10°C on Fri afternoon). Winds decreasing (strong winds from the W on Sat afternoon, calm by Sun night).

Days 5–7 Weather Summary

Mostly dry. Cool air temperatures (max 17°C on Tue afternoon, min 12°C on Mon afternoon). Wind will be generally light.

Days 8–10 Weather Summary

Some drizzle, heaviest during Fri night. Very mild (max 18°C on Fri afternoon, min 15°C on Thu afternoon). Mainly fresh winds.

Days 11–13 Weather Summary

Heavy rain (total 22mm), heaviest during Mon morning. Warm (max 21°C on Wed morning, min 15°C on Mon afternoon). Winds decreasing (strong winds from the S on Mon morning, light winds from the SW by Tue afternoon).

Fri
23
Saturday
24
Sunday
25
Monday
26
Tuesday
27
Wednesday
28
Thursday
29
Friday
30
Saturday
31
Sunday
1
Monday
2
Tuesday
3
Wed
4
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
9:00PM0.43m
9:32AM0.40m
9:53PM0.45m
10:29AM0.41m
10:45PM0.47m
11:25AM0.41m
11:37PM0.48m
12:19PM0.41m
00:29AM0.48m
1:13PM0.41m
1:21AM0.48m
2:07PM0.40m
2:15AM0.46m
3:02PM0.39m
3:10AM0.44m
3:57PM0.37m
4:06AM0.42m
4:54PM0.37m
5:04AM0.39m
5:50PM0.36m
6:03AM0.37m
6:46PM0.36m
7:03AM0.36m
Low Tide
2:50PM0.01m
3:26AM-0.01m
3:43PM-0.00m
4:23AM-0.04m
4:36PM-0.01m
5:17AM-0.05m
5:28PM-0.01m
6:10AM-0.07m
6:20PM-0.01m
7:03AM-0.07m
7:12PM-0.00m
7:55AM-0.06m
8:05PM0.01m
8:48AM-0.04m
8:58PM0.02m
9:42AM-0.02m
9:54PM0.04m
10:36AM0.00m
10:52PM0.05m
11:31AM0.02m
11:51PM0.06m
12:26PM0.04m
00:52AM0.07m
Wave
height (m) 
direction
period (s) 
1.2
E
9.0
1
E
9.0
1.1
ESE
8.0
1.4
S
7.0
1.3
WSW
5.0
1.1
W
5.0
0.7
SSE
7.0
0.6
SSE
7.0
0.5
SW
5.0
0.4
SSE
7.0
0.4
SSE
7.0
0.4
SE
14.0
0.5
SW
3.0
0.5
SW
3.0
0.5
S
5.0
0.4
SE
13.0
0.4
SE
12.0
0.4
SE
12.0
0.4
SE
9.0
0.6
S
7.0
0.6
S
7.0
0.6
SSE
7.0
0.8
SSE
7.0
0.9
SE
7.0
0.9
SE
7.0
1.2
SSE
7.0
1.2
S
7.0
1.2
S
8.0
1.9
S
7.0
1.9
S
8.0
1.9
S
9.0
1.8
S
9.0
1.5
S
9.0
1.3
S
9.0
1.3
S
8.0
1.1
S
9.0
clear
part cloud
rain showers
cloud
part cloud
cloud
cloud
part cloud
clear
clear
clear
clear
clear
part cloud
cloud
cloud
clear
clear
clear
part cloud
part cloud
part cloud
light rain
cloud
cloud
part cloud
cloud
part cloud
light rain
heavy rain
light rain
part cloud
clear
clear
part cloud
clear
clear
some clouds
rain shwrs
cloudy
some clouds
cloudy
cloudy
some clouds
clear
clear
clear
clear
clear
some clouds
cloudy
cloudy
clear
clear
clear
some clouds
some clouds
some clouds
light rain
cloudy
cloudy
some clouds
cloudy
some clouds
light rain
heavy rain
light rain
some clouds
clear
clear
some clouds
clear
 km/h
25
WSW
25
W
35
WSW
35
W
35
WNW
30
WNW
15
NNW
20
NW
5
NNE
5
S
15
WNW
20
SW
25
SW
20
WSW
20
SW
15
SW
15
WSW
15
SW
15
SSW
20
S
15
S
15
SSW
15
SSW
20
SW
25
SW
30
SW
25
SW
25
SSW
45
S
35
SSW
35
S
30
WSW
20
WSW
20
SW
25
WSW
25
SW
 mm 
2
1
4
17
1
max°C
10
12
11
12
12
11
12
12
11
12
15
15
17
16
15
17
17
15
15
17
17
18
18
15
15
16
16
17
18
17
16
16
17
20
20
21
Moonrise
2:50
3:14
3:44
4:19
5:05
6:02
7:09
8:23
9:36
10:47
11:53
12:57
1:58
Moonset
3:59
5:18
6:41
8:04
9:21
10:28
11:20
12:01
12:32
12:57
1:18
1:37
Sunrise
5:13
5:13
5:11
5:11
5:11
5:09
5:09
5:09
5:09
5:07
5:07
5:07
Sunset
7:58
7:59
8:00
8:00
8:01
8:02
8:02
8:04
8:05
8:06
8:06
8:07
Today's sea temperature in Siasconset, Nantucket Island is 10.5 °C (Statistics for 23 May 1981-2005 – mean: 11.7 max: 13.7 min: 10.0°C)
Issued (local time): 1 pm Friday 23 May 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest