Portage Bay, Kupreanof Island Sea Conditions and Tide Table

Portage Bay, Kupreanof 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 —.

Days 1–4 Weather Summary

Mostly dry. Air temperatures will be well below freezing (max -9°C on Sat night, min -17°C on Sun night). Wind will be generally light.

Days 5–7 Weather Summary

A dusting of new snow. Air temperatures will be below freezing (max -4°C on Fri morning, min -14°C on Tue night). Wind will be generally light.

Days 8–10 Weather Summary

A heavy fall of snow, heaviest during Fri night. Freeze-thaw conditions (max 1°C on Sun morning, min -7°C on Mon morning). Wind will be generally light.

Days 11–13 Weather Summary

A heavy fall of snow, heaviest during Mon night. Temperatures will be well below freezing (max -8°C on Mon night, min -16°C on Wed night). Wind will be generally light.

Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thu
1
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
High Tide
1:47AM4.33m
1:08PM5.01m
2:21AM4.35m
1:43PM4.95m
2:56AM4.35m
2:20PM4.82m
3:31AM4.36m
3:00PM4.61m
4:09AM4.37m
3:46PM4.34m
4:51AM4.41m
4:41PM4.03m
5:37AM4.47m
5:48PM3.74m
6:29AM4.56m
7:06PM3.56m
7:27AM4.69m
8:31PM3.59m
8:29AM4.89m
9:49PM3.81m
9:30AM5.14m
10:55PM4.11m
10:29AM5.36m
Low Tide
7:16PM-0.38m
7:17AM1.36m
7:51PM-0.39m
7:53AM1.37m
8:26PM-0.32m
8:32AM1.38m
9:01PM-0.19m
9:14AM1.40m
9:38PM0.02m
10:01AM1.40m
10:19PM0.30m
10:56AM1.34m
11:04PM0.63m
12:00PM1.20m
11:58PM0.99m
1:12PM0.94m
1:03AM1.29m
2:23PM0.54m
2:14AM1.46m
3:29PM0.05m
3:23AM1.47m
4:27PM-0.40m
4:26AM1.37m
5:21PM-0.83m
Wave
height (m) 
direction
period (s) 
part cloud
part cloud
clear
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
cloud
cloud
light snow
heavy snow
light snow
light snow
heavy snow
mod snow
light snow
light snow
light snow
mod snow
heavy snow
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
light snow
some clouds
some clouds
clear
some clouds
clear
clear
some clouds
some clouds
some clouds
some clouds
clear
clear
clear
clear
clear
cloudy
cloudy
light snow
heavy snow
light snow
light snow
heavy snow
mod snow
light snow
light snow
light snow
mod snow
heavy snow
some clouds
cloudy
some clouds
some clouds
some clouds
some clouds
some clouds
light snow
 km/h
5
NNE
10
NNE
10
NNE
10
NE
5
NNE
10
N
10
N
5
N
5
N
5
N
5
NNE
10
N
5
NNE
0
E
0
SSE
5
SE
10
SE
15
SE
15
SE
10
SSE
10
SE
5
ENE
15
SE
15
ESE
10
ENE
10
NNW
15
NNW
5
W
10
NNW
10
NNW
15
NNW
5
N
5
N
5
ESE
0
NE
5
NNE
 mm 
max°C
-9
-13
-14
-16
-15
-14
-13
-12
-12
-13
-11
-11
-13
-8
-9
-7
-4
-4
0
0
-1
-1
1
0
-1
-7
-7
-8
-8
-9
-10
-11
-12
-13
-9
-8
Moonrise
10:32
10:49
10:59
11:06
11:11
11:16
11:20
11:25
11:32
11:44
12:05
12:45
Moonset
4:22
5:48
7:16
8:43
10:09
11:36
1:06
2:42
4:23
6:08
7:45
Sunrise
8:30
8:30
8:30
8:30
8:30
8:30
8:30
8:30
8:30
8:30
8:30
8:30
Sunset
3:11
3:12
3:14
3:14
3:15
3:15
3:17
3:18
3:18
3:19
3:21
3:22
Today's sea temperature in Portage Bay, Kupreanof Island is
5.1° C
(Statistics for 20 Dec 1981-2005 – mean: 7.1 max: 8.6 min: 5.4°C)
Issued (local time): 8 pm Saturday 20 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest