Chichagof Harbor, Attu Island Sea Conditions and Tide Table

Chichagof Harbor, Attu 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 10:32 PM.

Days 1–4 Weather Summary

Mild with moderate rain (total 10mm) on Mon night. Becoming colder with a light covering of snow, mostly falling on Tue night. Icy conditions (max 3°C on Mon night, min -1°C on Sun night). Winds increasing (moderate winds from the N on Sun night, gales from the N by Tue night).

Days 5–7 Weather Summary

Mostly dry. Air temperatures will be below freezing (max 0°C on Wed night, min -1°C on Thu night). Mainly fresh winds.

Days 8–10 Weather Summary

Mostly dry. Freeze-thaw conditions (max 2°C on Mon afternoon, min 0°C on Sat night). Winds decreasing (strong winds from the NW on Mon morning, light winds from the N by Tue afternoon).

Days 11–13 Weather Summary

Mostly dry. Temperatures will be slightly above freezing (max 2°C on Tue night, min 2°C on Tue night). Mainly fresh winds.

Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
Tuesday
28
Wednesday
29
Thursday
30
Friday
1
Saturday
2
Sunday
3
Monday
4
Tue
5
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
night
AM
Wave Height Map
High Tide
11:14PM0.96m
6:52AM1.14m
00:09AM0.97m
7:42AM1.17m
00:56AM0.94m
8:38AM1.15m
1:36AM0.91m
9:38AM1.09m
2:10AM0.89m
10:47AM0.98m
2:42AM0.87m
12:10PM0.84m
3:11AM0.87m
1:53PM0.72m
3:40AM0.89m
3:52PM0.66m
4:07AM0.90m
5:48PM0.68m
4:32AM0.91m
7:26PM0.76m
8:43PM0.85m
9:45PM0.93m
10:38PM0.98m
11:27PM1.00m
6:05AM0.93m
Low Tide
2:05AM0.91m
3:28PM-0.55m
2:46AM0.92m
4:19PM-0.55m
3:38AM0.90m
5:10PM-0.48m
4:44AM0.85m
6:03PM-0.37m
6:05AM0.77m
6:55PM-0.23m
7:35AM0.65m
7:47PM-0.05m
9:02AM0.49m
8:40PM0.13m
10:15AM0.31m
9:34PM0.31m
11:15AM0.14m
10:33PM0.48m
12:04PM-0.02m
11:36PM0.62m
12:47PM-0.13m
00:42AM0.74m
1:26PM-0.22m
1:48AM0.82m
2:03PM-0.27m
2:47AM0.87m
2:39PM-0.30m
3:37AM0.91m
Wave
height (m) 
direction
period (s) 
3.5
N
12
3
NNE
12
3
NNE
11
4
N
11
4.5
N
12
5
NNE
12
7
NNE
13
6.5
NNE
13
6
NNE
13
4.5
NNE
12
3.5
NNE
12
3
NNE
11
2.5
NNE
11
2.3
NNE
10
2.5
NNE
9
2.1
NNE
8
2
N
7
1.7
N
7
1.6
NNE
8
1.6
NNE
8
1.7
NNW
7
1.8
NNW
7
2.4
NW
8
2.5
NNW
8
2.5
NNW
8
2
N
8
1.6
N
8
1.3
N
8
1.2
NNE
7
1.5
NE
5
1.6
NE
9
1.4
NE
8
1.3
NNE
8
1.1
NE
7
1.2
ENE
6
1.6
ENE
6
1.7
ENE
7
1.6
ENE
7
1.4
ENE
7
1.1
ENE
7
1
ENE
7
1
ENE
8
1.1
ENE
8
1.2
ENE
8
1.3
NE
8
1.3
NE
8
1.4
NE
6
cloud
cloud
light rain
mod rain
light rain
light snow
light snow
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
part cloud
part cloud
part cloud
cloud
cloud
part cloud
cloud
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
part cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
cloudy
cloudy
light rain
mod rain
light rain
light snow
light snow
cloudy
cloudy
cloudy
cloudy
cloudy
cloudy
cloudy
cloudy
some clouds
some clouds
some clouds
cloudy
cloudy
some clouds
cloudy
cloudy
some clouds
some clouds
some clouds
some clouds
some clouds
cloudy
cloudy
cloudy
cloudy
cloudy
cloudy
cloudy
cloudy
cloudy
cloudy
cloudy
some clouds
some clouds
some clouds
cloudy
cloudy
cloudy
cloudy
cloudy
 km/h
25
NNE
25
N
40
N
35
N
40
NNE
55
N
60
N
60
N
45
N
20
NNW
20
ENE
40
NE
30
NNE
30
NNW
30
NNW
25
NW
30
NW
25
NW
25
WNW
25
WNW
35
WNW
35
WNW
45
NW
45
NW
40
NW
25
NW
10
NNW
15
ENE
30
E
35
E
30
ENE
25
ENE
20
ENE
20
E
25
ENE
30
ENE
35
NNE
25
N
20
NNW
20
NNW
15
NNW
5
NNW
15
E
25
E
25
E
30
ENE
35
NE
 mm 
1
8
1
max°C
1
1
2
3
3
2
0
0
1
0
0
0
0
0
0
0
0
0
0
0
1
1
1
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
3
2
2
2
2
Moonrise
9:35
10:36
11:56
1:24
2:51
4:15
5:35
6:53
8:09
9:24
10:41
11:58
1:12
2:21
3:19
Moonset
3:03
4:17
5:09
5:42
6:04
6:20
6:31
6:41
6:51
7:00
7:11
7:24
7:42
8:07
8:42
9:31
Sunrise
8:17
8:15
8:12
8:11
8:07
8:06
8:03
8:02
8:00
7:58
7:56
7:54
7:52
7:50
7:48
7:46
Sunset
10:32
10:35
10:37
10:38
10:39
10:42
10:44
10:45
10:46
10:49
10:51
10:52
10:53
10:55
10:58
11:00
Today's sea temperature in Chichagof Harbor, Attu Island is
3.9° C
(Statistics for 19 Apr 1981-2005 – mean: 3.5 max: 4.2 min: 2.3°C)
Issued (local time): 8 pm Sunday 19 Apr 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest