Duwamish Waterway Sea Conditions and Tide Table

Duwamish Waterway 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 07:51 PM.

Days 1–4 Weather Summary

Light rain (total 5mm), mostly falling on Sat morning. Warm air temperatures (max 22°C on Fri afternoon, min 8°C on Sat night). Wind will be generally light.

Days 5–7 Weather Summary

Heavy rain (total 20mm), heaviest during Tue afternoon. Cool air temperatures (max 11°C on Mon afternoon, min 2°C on Tue night). Wind will be generally light.

Days 8–10 Weather Summary

Mostly dry. Very mild (max 18°C on Sat afternoon, min 5°C on Thu night). Wind will be generally light.

Days 11–13 Weather Summary

Light rain (total 7mm), mostly falling on Sun night. Very mild (max 18°C on Sun afternoon, min 5°C on Mon night). Wind will be generally light.

Fri
10
Saturday
11
Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Friday
17
Saturday
18
Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
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
night
Wave Height Map
High Tide
2:08AM3.11m
11:53AM2.32m
2:46AM3.17m
1:20PM2.35m
3:15AM3.21m
2:35PM2.48m
3:38AM3.25m
3:39PM2.69m
4:00AM3.29m
4:36PM2.92m
4:23AM3.34m
5:30PM3.15m
6:22PM3.33m
5:19AM3.41m
7:16PM3.45m
5:52AM3.41m
8:12PM3.49m
6:29AM3.36m
9:13PM3.47m
7:11AM3.24m
10:18PM3.42m
8:00AM3.04m
11:27PM3.38m
9:05AM2.78m
00:33AM3.38m
10:31AM2.52m
Low Tide
6:15PM0.36m
8:18AM2.00m
7:17PM0.44m
9:02AM1.73m
8:13PM0.51m
9:36AM1.40m
9:04PM0.62m
10:07AM1.00m
9:51PM0.76m
10:38AM0.57m
10:35PM0.95m
11:12AM0.13m
11:18PM1.17m
11:48AM-0.27m
00:03AM1.41m
12:27PM-0.58m
00:48AM1.66m
1:10PM-0.77m
1:36AM1.88m
1:57PM-0.82m
2:30AM2.07m
2:48PM-0.72m
3:34AM2.19m
3:44PM-0.51m
4:53AM2.19m
4:47PM-0.23m
6:30AM2.02m
Wave
height (m) 
direction
period (s) 
part cloud
cloud
light rain
cloud
part cloud
part cloud
light rain
cloud
part cloud
part cloud
cloud
light rain
mod rain
rain showers
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
light rain
light rain
rain showers
cloud
part cloud
part cloud
cloud
clear
part cloud
part cloud
clear
cloud
heavy rain
mod rain
rain showers
light rain
light rain
cloud
cloud
some clouds
cloudy
light rain
cloudy
some clouds
some clouds
light rain
cloudy
some clouds
some clouds
cloudy
light rain
mod rain
rain shwrs
cloudy
some clouds
some clouds
some clouds
some clouds
some clouds
some clouds
some clouds
clear
clear
clear
some clouds
some clouds
some clouds
light rain
light rain
rain shwrs
cloudy
some clouds
some clouds
cloudy
clear
some clouds
some clouds
clear
cloudy
heavy rain
mod rain
rain shwrs
light rain
light rain
cloudy
cloudy
 km/h
10
NNW
5
SW
10
S
5
SSE
5
N
5
NNW
5
NNW
15
S
10
WSW
10
SW
15
SSW
20
S
25
S
10
SW
5
SW
10
N
5
SE
15
SSW
10
W
5
SE
5
NNE
5
NNW
5
NNE
5
N
5
WSW
0
ENE
5
WNW
15
WSW
20
SSW
20
SSW
20
SSW
15
SSW
10
S
5
NNW
5
S
5
NNE
5
WSW
0
E
5
SW
10
SW
10
SSW
25
SSW
20
SW
15
SSW
20
S
20
S
10
S
 mm 
4
1
4
10
6
4
1
2
17
6
1
3
2
max°C
22
15
9
10
10
12
14
12
9
11
9
7
6
6
4
9
8
8
12
9
8
13
10
11
18
15
15
18
11
9
8
7
10
13
10
10
16
14
14
17
16
11
13
8
6
8
7
Moonrise
4:08
4:30
4:49
5:06
5:23
5:40
6:00
6:26
6:59
7:44
8:45
9:58
11:18
12:39
1:56
Moonset
1:09
2:23
3:37
4:54
6:13
7:35
9:01
10:29
11:54
1:09
2:07
2:50
3:21
3:44
Sunrise
6:28
6:26
6:24
6:22
6:20
6:18
6:16
6:15
6:13
6:11
6:09
6:07
6:05
6:03
6:03
Sunset
7:51
7:52
7:53
7:54
7:55
7:58
7:59
8:00
8:01
8:02
8:05
8:06
8:07
8:08
8:09
8:12
Today's sea temperature in Duwamish Waterway is
10.7° C
(Statistics for 10 Apr 1981-2005 – mean: 9.2 max: 10.6 min: 8.3°C)
Issued (local time): 4 pm Friday 10 Apr 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest