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 08:19 AM and sunset is at 04:06 PM.

Days 1–3 Weather Summary

A heavy fall of snow, heaviest during Thu night. Icy conditions (max 1°C on Sat afternoon, min -11°C on Thu morning). Winds increasing (light winds from the NNE on Thu morning, stormy winds from the N by Thu night).

Days 4–6 Weather Summary

A light covering of new snow, mostly falling on Sun morning. Icy conditions (max 1°C on Sun morning, min -4°C on Tue night). Winds increasing (light winds from the NW on Mon morning, gales from the SSW by Tue night).

Days 7–9 Weather Summary

A moderate fall of snow, heaviest on Fri night. Freeze-thaw conditions (max 1°C on Fri night, min -7°C on Thu morning). Winds decreasing (gales from the SSW on Wed morning, calm by Thu night).

Days 10–12 Weather Summary

A light covering of new snow, mostly falling on Mon night. Temperatures will be below freezing (max -5°C on Mon night, min -19°C on Sat night). Winds decreasing (fresh winds from the N on Sat morning, light winds from the S by Mon night).

Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thursday
1
Friday
2
Saturday
3
Sunday
4
Monday
5
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
10:34AM1.14m
11:43PM0.83m
11:21AM1.08m
00:40AM0.86m
12:17PM1.00m
1:46AM0.90m
1:23PM0.93m
2:58AM0.95m
2:42PM0.87m
4:06AM1.02m
4:01PM0.84m
5:03AM1.11m
5:08PM0.84m
5:54AM1.22m
6:06PM0.84m
6:40AM1.30m
6:59PM0.86m
7:24AM1.37m
7:48PM0.88m
8:07AM1.40m
8:37PM0.89m
8:50AM1.38m
9:24PM0.90m
Low Tide
5:10PM0.30m
4:40AM0.44m
5:48PM0.35m
5:32AM0.52m
6:33PM0.38m
6:53AM0.58m
7:36PM0.41m
9:41AM0.54m
9:03PM0.40m
10:49AM0.44m
10:12PM0.36m
11:42AM0.33m
11:06PM0.30m
12:33PM0.23m
11:55PM0.22m
1:20PM0.14m
00:41AM0.16m
2:05PM0.08m
1:25AM0.11m
2:48PM0.05m
2:07AM0.10m
3:27PM0.06m
2:48AM0.13m
Wave
height (m) 
direction
period (s) 
0.6
E
9
2.2
ENE
6
4.5
E
12
3.5
ESE
13
2.3
ESE
13
2.1
ESE
12
3
NE
10
3.5
NE
10
2.1
ESE
11
3
E
11
3
ESE
11
2
E
11
1.5
E
11
1.7
E
10
1.5
E
10
2.5
E
13
2.5
E
13
2.5
E
12
2.5
E
11
2
E
11
1.2
E
10
0.9
E
10
0.8
E
10
0.9
ESE
9
0.6
ESE
8
1
SE
8
1.2
SE
9
1.3
ESE
9
0.9
ESE
8
0.6
ESE
8
0.4
ESE
8
0.5
ESE
7
0.8
ESE
10
1.2
ESE
14
1
SE
13
0.8
SE
12
cloud
light snow
heavy snow
light snow
cloud
snow showers
light snow
light snow
snow showers
light snow
light snow
cloud
light snow
cloud
cloud
cloud
light snow
light snow
light snow
part cloud
snow showers
light snow
light snow
part cloud
light snow
light snow
mod snow
light snow
part cloud
part cloud
part cloud
clear
clear
part cloud
cloud
light snow
cloudy
light snow
heavy snow
light snow
cloudy
snow shwrs
light snow
light snow
snow shwrs
light snow
light snow
cloudy
light snow
cloudy
cloudy
cloudy
light snow
light snow
light snow
some clouds
snow shwrs
light snow
light snow
some clouds
light snow
light snow
mod snow
light snow
some clouds
some clouds
some clouds
clear
clear
some clouds
cloudy
light snow
 km/h
20
NE
65
NNE
95
N
60
NW
40
NW
50
N
75
NNE
75
N
20
E
45
E
40
ESE
15
ESE
10
NW
20
NW
15
WNW
30
SSE
50
SW
60
SSW
60
SW
40
WSW
25
WSW
20
SSW
15
SSW
15
WSW
20
NNE
10
NW
35
N
30
NW
25
W
20
W
20
NW
25
NW
30
W
35
WSW
15
SSW
15
NE
 mm 
max°C
-8
-3
-2
-2
-2
-6
-1
1
1
1
0
0
0
1
0
-1
0
-3
-2
-1
-3
-5
-5
-2
-5
-2
1
-9
-11
-18
-18
-16
-16
-13
-9
-5
Moonrise
11:20
11:32
11:43
11:55
12:09
12:29
12:59
1:43
2:48
4:11
5:42
7:12
Moonset
10:18
11:38
12:59
2:24
3:55
5:28
6:57
8:12
9:05
9:40
10:03
Sunrise
8:19
8:19
8:21
8:21
8:21
8:21
8:21
8:21
8:21
8:19
8:19
8:19
Sunset
4:06
4:07
4:07
4:07
4:08
4:09
4:10
4:12
4:14
4:15
4:15
4:16
Today's sea temperature in Castle Island is
0.6° C
(Statistics for 25 Dec 1981-2005 – mean: -0.1 max: 0.4 min: -0.9°C)
Issued (local time): 1 am Thursday 25 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest