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 07:03 AM and sunset is at 07:00 PM.

Days 1–3 Weather Summary

A moderate fall of snow, heaviest on Wed afternoon. Icy conditions (max 2°C on Thu morning, min -4°C on Thu night). Wind will be generally light.

Days 4–6 Weather Summary

A dusting of new snow. Icy conditions (max 2°C on Fri afternoon, min -4°C on Sun night). Wind will be generally light.

Days 7–9 Weather Summary

A light covering of new snow, mostly falling on Tue night. Freeze-thaw conditions (max 2°C on Mon afternoon, min -7°C on Tue night). Wind will be generally light.

Days 10–12 Weather Summary

A heavy fall of snow, heaviest during Thu afternoon. Freeze-thaw conditions (max 3°C on Sat morning, min -2°C on Thu night). Winds increasing (calm on Thu morning, strong winds from the SE by Sat morning).

Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Wednesday
25
Thursday
26
Friday
27
Saturday
28
Sunday
29
Monday
30
Tuesday
31
Wed
1
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
PM
Wave Height Map
High Tide
12:42PM4.84m
1:15AM4.92m
1:21PM5.05m
1:44AM5.23m
1:59PM5.14m
2:14AM5.45m
2:39PM5.08m
2:47AM5.53m
3:20PM4.87m
3:23AM5.47m
4:05PM4.52m
4:02AM5.25m
4:57PM4.09m
4:48AM4.90m
6:00PM3.64m
5:47AM4.48m
7:24PM3.35m
7:07AM4.11m
9:04PM3.39m
8:45AM3.99m
10:24PM3.74m
10:12AM4.16m
11:20PM4.18m
11:17AM4.45m
00:02AM4.59m
12:09PM4.70m
00:38AM4.92m
12:53PM4.86m
Low Tide
7:00PM-0.36m
7:18AM-0.07m
7:33PM-0.45m
7:54AM-0.48m
8:06PM-0.40m
8:32AM-0.76m
8:40PM-0.22m
9:12AM-0.87m
9:17PM0.09m
9:55AM-0.78m
9:55PM0.49m
10:43AM-0.52m
10:39PM0.96m
11:39AM-0.13m
11:34PM1.44m
12:51PM0.24m
00:53AM1.83m
2:19PM0.43m
2:41AM1.88m
3:43PM0.34m
4:12AM1.53m
4:48PM0.11m
5:15AM1.00m
5:38PM-0.10m
6:03AM0.48m
6:20PM-0.22m
6:44AM0.03m
Wave
height (m) 
direction
period (s) 
light snow
light snow
light snow
light snow
snow showers
light snow
light snow
light snow
snow showers
part cloud
cloud
cloud
cloud
light snow
light snow
cloud
cloud
cloud
cloud
clear
cloud
cloud
cloud
light snow
light snow
part cloud
light snow
light snow
light snow
snow showers
cloud
light snow
light snow
light snow
light snow
mod snow
light snow
light snow
light snow
light rain
light snow
mod snow
cloud
light snow
cloud
light snow
light snow
light snow
light snow
light snow
light snow
snow shwrs
light snow
light snow
light snow
snow shwrs
some clouds
cloudy
cloudy
cloudy
light snow
light snow
cloudy
cloudy
cloudy
cloudy
clear
cloudy
cloudy
cloudy
light snow
light snow
some clouds
light snow
light snow
light snow
snow shwrs
cloudy
light snow
light snow
light snow
light snow
mod snow
light snow
light snow
light snow
light rain
light snow
mod snow
cloudy
light snow
cloudy
light snow
light snow
 km/h
15
S
15
S
5
SE
15
SE
5
SSW
10
SSE
10
SSE
20
S
10
SE
5
ESE
10
ESE
10
ESE
20
ESE
15
SE
10
SE
10
ESE
10
ESE
5
ESE
5
NE
5
NNW
5
NE
10
N
10
N
5
NNE
10
NNW
5
N
5
SE
5
NNE
5
E
5
NW
5
E
10
ESE
5
ENE
10
E
15
SE
10
SE
10
ESE
20
SSW
10
ESE
10
E
5
NE
5
W
15
S
15
SSE
10
SE
10
SSE
10
SE
 mm 
2
2
max°C
1
1
-1
1
1
0
2
2
-1
1
2
-1
2
2
-1
2
2
-1
1
2
-3
-1
-2
-5
-5
-4
-3
-1
0
-1
2
1
-1
3
1
0
1
2
0
2
2
2
1
2
0
2
2
Moonrise
6:47
6:51
6:55
7:01
7:08
7:20
7:39
8:16
9:19
10:46
12:23
1:59
3:30
4:57
6:22
7:45
Moonset
5:38
7:09
8:43
10:21
12:03
1:45
3:19
4:27
5:08
5:29
5:41
5:49
5:54
5:58
6:02
Sunrise
7:03
7:01
6:58
6:56
6:52
6:50
6:47
6:45
6:41
6:39
6:37
6:33
6:31
6:28
6:26
6:22
Sunset
7:00
7:01
7:04
7:06
7:07
7:09
7:13
7:15
7:16
7:19
7:21
7:22
7:24
7:28
7:30
7:31
Today's sea temperature in Portage Bay, Kupreanof Island is
3.7° C
(Statistics for 17 Mar 1981-2005 – mean: 5.9 max: 7.2 min: 5.0°C)
Issued (local time): 3 am Tuesday 17 Mar 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest