Castle Island Sea Conditions and Tide Table

Castle 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 07:33 AM and sunset is at 04:22 PM.

Days 1–3 Weather Summary

Heavy rain (total 25mm), heaviest during Mon afternoon. Low air temperatures (max 5°C on Sat morning, min 3°C on Sat afternoon). Winds decreasing (near gales from the ESE on Sat morning, light winds from the SSE by Sat night).

Days 4–6 Weather Summary

Light rain (total 4mm), mostly falling on Tue night. Icy conditions (max 5°C on Tue morning, min 0°C on Thu night). Winds decreasing (near gales from the SW on Wed afternoon, moderate winds from the W by Thu night).

Days 7–9 Weather Summary

A dusting of new snow. Freeze-thaw conditions (max 2°C on Fri night, min -3°C on Sat night). Winds decreasing (strong winds from the WSW on Fri night, calm by Sun morning).

Days 10–12 Weather Summary

A light covering of new snow on Mon morning turning to drizzle on Mon afternoon. Freeze-thaw conditions (max 2°C on Mon morning, min -4°C on Wed night). Winds increasing (light winds from the W on Mon night, gales from the NNW by Wed morning).

Saturday
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
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
Wave Height Map
High Tide
4:39PM0.95m
5:25AM0.99m
5:19PM0.92m
5:57AM1.05m
5:54PM0.90m
6:26AM1.10m
6:26PM0.88m
6:54AM1.12m
6:58PM0.86m
7:22AM1.14m
7:29PM0.84m
7:49AM1.15m
8:01PM0.81m
8:18AM1.15m
8:36PM0.78m
8:49AM1.15m
9:17PM0.75m
9:24AM1.14m
10:06PM0.72m
10:04AM1.11m
11:06PM0.70m
10:52AM1.08m
00:17AM0.71m
Low Tide
11:04AM0.44m
11:09PM0.30m
11:40AM0.37m
11:29PM0.28m
12:11PM0.30m
11:48PM0.25m
12:40PM0.25m
00:11AM0.21m
1:10PM0.22m
00:39AM0.18m
1:40PM0.21m
1:10AM0.17m
2:13PM0.22m
1:43AM0.17m
2:49PM0.25m
2:16AM0.20m
3:26PM0.29m
2:49AM0.25m
4:07PM0.34m
3:23AM0.32m
4:52PM0.39m
4:00AM0.40m
5:48PM0.43m
Wave
height (m) 
direction
period (s) 
3
E
11
2.3
E
11
1.6
E
10
1.4
ENE
10
1.6
ENE
10
1.4
ENE
10
2.1
E
9
2.3
E
9
2.5
E
11
2.3
E
11
1.8
E
11
1.7
E
10
2
SSW
7
2.2
SW
7
1.3
ESE
8
1
ESE
8
0.8
ESE
8
0.7
ESE
8
0.4
ESE
8
0.6
SW
4
1.3
SW
5
0.9
SW
4
0.7
SW
4
0.3
ESE
8
0.2
ESE
8
0.4
SE
3
1.4
SE
5
1.6
SE
7
1.1
SE
12
0.8
SE
11
0.7
SE
11
0.8
SE
11
1.3
NE
6
1.7
NNE
5
1.6
NNW
5
1.7
NNW
5
cloud
part cloud
cloud
part cloud
part cloud
part cloud
light rain
heavy rain
rain showers
part cloud
part cloud
rain showers
light rain
light rain
clear
part cloud
clear
clear
clear
clear
cloud
clear
clear
clear
part cloud
cloud
light snow
light snow
light rain
cloud
cloud
cloud
cloud
light snow
cloud
cloud
cloudy
some clouds
cloudy
some clouds
some clouds
some clouds
light rain
heavy rain
rain shwrs
some clouds
some clouds
rain shwrs
light rain
light rain
clear
some clouds
clear
clear
clear
clear
cloudy
clear
clear
clear
some clouds
cloudy
light snow
light snow
light rain
cloudy
cloudy
cloudy
cloudy
light snow
cloudy
cloudy
 km/h
40
ESE
30
ESE
10
S
25
S
20
SSE
25
E
50
E
20
SSE
45
S
45
S
30
SSW
45
SSW
50
SW
55
SW
35
WSW
30
WSW
30
WSW
30
W
25
W
25
WSW
40
WSW
35
W
35
WNW
10
WNW
10
ESE
20
SE
40
SE
30
S
10
SSW
10
NNW
10
NNE
25
NE
40
N
65
NNW
60
NW
60
NW
 mm 
3
20
2
1
2
1
1
max°C
5
4
4
3
4
3
4
5
5
5
5
3
3
3
3
2
2
1
0
1
2
0
0
-2
-1
0
1
2
2
2
1
1
0
0
0
-1
Moonrise
2:28
3:39
4:51
6:04
7:18
8:31
9:40
10:40
11:28
12:03
12:28
12:47
Moonset
2:29
2:39
2:50
3:03
3:21
3:45
4:18
5:05
6:05
7:16
8:32
9:51
Sunrise
7:33
7:33
7:35
7:37
7:39
7:41
7:43
7:45
7:46
7:48
7:48
7:50
Sunset
4:22
4:20
4:19
4:17
4:15
4:15
4:14
4:13
4:12
4:10
4:09
4:08
Today's sea temperature in Castle Island is
3.8° C
(Statistics for 15 Nov 1981-2005 – mean: 1.6 max: 2.9 min: 0.2°C)
Issued (local time): 1 am Saturday 15 Nov 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest