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 08:27 AM and sunset is at 03:11 PM.

Days 1–3 Weather Summary

Mostly dry. Air temperatures will be well below freezing (max -7°C on Thu morning, min -13°C on Thu night). Wind will be generally light.

Days 4–6 Weather Summary

Mostly dry. Extremely cold air temperatures (max -13°C on Sun morning, min -17°C on Mon morning). Wind will be generally light.

Days 7–9 Weather Summary

A moderate fall of snow, heaviest on Fri night. Temperatures will be below freezing (max 0°C on Fri afternoon, min -15°C on Wed night). Wind will be generally light.

Days 10–12 Weather Summary

A moderate fall of snow, heaviest on Sun morning. Temperatures will be below freezing (max -3°C on Sat morning, min -13°C on Sun night). Wind will be generally light.

Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
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
11:23AM4.86m
00:37AM4.21m
11:59AM4.96m
1:13AM4.29m
12:34PM5.01m
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
Low Tide
6:06PM-0.18m
6:04AM1.44m
6:41PM-0.31m
6:40AM1.39m
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
Wave
height (m) 
direction
period (s) 
part cloud
clear
clear
part cloud
clear
clear
clear
part cloud
part cloud
cloud
part cloud
cloud
part cloud
part cloud
cloud
cloud
clear
clear
clear
clear
clear
clear
part cloud
light snow
light snow
light snow
mod snow
cloud
light snow
snow showers
light snow
light snow
light snow
light snow
part cloud
part cloud
some clouds
clear
clear
some clouds
clear
clear
clear
some clouds
some clouds
cloudy
some clouds
cloudy
some clouds
some clouds
cloudy
cloudy
clear
clear
clear
clear
clear
clear
some clouds
light snow
light snow
light snow
mod snow
cloudy
light snow
snow shwrs
light snow
light snow
light snow
light snow
some clouds
some clouds
 km/h
10
N
10
N
5
NNE
5
NE
5
NNE
5
N
5
N
5
NNW
5
N
10
N
10
NNE
10
NE
10
NNE
5
N
10
N
5
NNE
5
NNE
5
NNE
5
N
10
N
5
NNE
5
SE
5
SE
10
SE
15
SE
20
ESE
10
ESE
10
E
5
NE
10
N
10
N
5
ENE
10
NNE
10
NNW
10
NNW
15
NNW
 mm 
max°C
-7
-8
-11
-11
-12
-13
-10
-11
-11
-13
-13
-16
-16
-16
-14
-13
-13
-15
-11
-11
-14
-10
-12
-6
-3
0
-2
-3
-4
-6
-12
-11
-12
-10
-10
-11
Moonrise
8:13
9:18
10:04
10:32
10:49
10:59
11:06
11:11
11:16
11:20
11:25
11:32
Moonset
1:18
2:00
3:03
4:22
5:48
7:16
8:43
10:09
11:36
1:06
2:42
Sunrise
8:27
8:27
8:29
8:30
8:30
8:30
8:30
8:30
8:30
8:30
8:30
8:30
Sunset
3:11
3:11
3:11
3:11
3:12
3:14
3:14
3:15
3:15
3:17
3:18
3:18
Today's sea temperature in Portage Bay, Kupreanof Island is
5.7° C
(Statistics for 18 Dec 1981-2005 – mean: 7.1 max: 8.7 min: 5.4°C)
Issued (local time): 8 am Thursday 18 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest