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 06:52 AM and sunset is at 07:10 PM.

Days 1–3 Weather Summary

Mostly dry. Warm air temperatures (max 23°C on Mon afternoon, min 10°C on Tue night). Wind will be generally light.

Days 4–6 Weather Summary

Moderate rain (total 11mm), heaviest on Thu night. Warm air temperatures (max 21°C on Wed afternoon, min 9°C on Fri night). Wind will be generally light.

Days 7–9 Weather Summary

Mostly dry. Warm (max 20°C on Mon afternoon, min 8°C on Sun morning). Wind will be generally light.

Days 10–12 Weather Summary

Moderate rain (total 11mm), heaviest on Thu night. Warm (max 24°C on Wed afternoon, min 11°C on Thu night). Wind will be generally light.

Days 13–16 Weather Summary

Mostly dry. Warm (max 24°C on Sun afternoon, min 8°C on Sat morning). Wind will be generally light.

Sunday
20
Monday
21
Tuesday
22
Wednesday
23
Thursday
24
Friday
25
Saturday
26
Sunday
27
Monday
28
Tuesday
29
Wednesday
30
Thursday
1
Friday
2
Saturday
3
Sunday
4
Mon
5
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
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
High Tide
2:54PM3.03m
00:19AM2.40m
3:36PM3.12m
1:37AM2.44m
4:08PM3.18m
2:43AM2.55m
4:31PM3.22m
3:38AM2.69m
4:49PM3.25m
4:28AM2.83m
5:07PM3.28m
5:15AM2.98m
5:26PM3.31m
6:02AM3.11m
5:48PM3.34m
6:51AM3.21m
6:13PM3.35m
7:43AM3.25m
6:42PM3.33m
8:41AM3.24m
7:15PM3.28m
9:46AM3.19m
7:54PM3.17m
11:01AM3.15m
8:43PM3.01m
12:22PM3.17m
9:49PM2.81m
1:34PM3.24m
Low Tide
6:55AM0.35m
8:46PM2.08m
7:58AM0.33m
9:31PM1.90m
8:51AM0.30m
10:04PM1.66m
9:35AM0.31m
10:32PM1.39m
10:15AM0.37m
11:00PM1.08m
10:52AM0.49m
11:29PM0.73m
11:28AM0.66m
00:00AM0.38m
12:05PM0.89m
00:33AM0.05m
12:44PM1.15m
1:10AM-0.21m
1:25PM1.44m
1:52AM-0.38m
2:10PM1.73m
2:39AM-0.45m
3:02PM2.00m
3:32AM-0.41m
4:08PM2.20m
4:34AM-0.29m
5:33PM2.26m
5:43AM-0.13m
Wave
Height (m)
Direction
Period (s)
clear
clear
clear
part cloud
part cloud
part cloud
cloud
part cloud
clear
clear
part cloud
part cloud
cloud
light rain
mod rain
cloud
rain showers
clear
part cloud
part cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
cloud
cloud
rain showers
clear
part cloud
clear
clear
part cloud
mod rain
light rain
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
some clouds
some clouds
some clouds
cloudy
some clouds
clear
clear
some clouds
some clouds
cloudy
light rain
mod rain
cloudy
rain shwrs
clear
some clouds
some clouds
some clouds
some clouds
clear
some clouds
some clouds
some clouds
some clouds
cloudy
cloudy
rain shwrs
clear
some clouds
clear
clear
some clouds
mod rain
light rain
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
km/h
5
N
10
NNW
5
NNE
5
WSW
5
SW
5
SE
5
SSW
10
NNE
5
SSE
10
SSW
5
WSW
5
NNE
5
NNW
5
SW
5
SSW
10
SSW
10
NE
5
S
0
S
10
N
5
NNE
5
N
10
NNW
5
ENE
0
E
0
NW
0
NW
0
SSW
5
S
5
S
5
SSW
5
SSW
5
S
10
SSW
15
WSW
15
NE
0
ENE
10
N
5
NNE
15
N
15
N
10
NNE
5
N
5
NNW
5
ENE
5
N
10
NNW
 mm
3
7
1
1
9
1
max °C
16
22
16
16
23
18
14
19
15
16
21
15
14
15
12
12
16
13
12
17
13
13
18
15
15
20
17
12
15
13
17
24
18
20
23
17
13
16
14
12
17
12
17
24
18
18
24
Moonrise
4:46
5:14
5:36
5:55
6:12
6:28
6:44
7:03
7:25
7:53
8:32
9:23
10:29
11:46
1:08
Moonset
1:03
2:13
3:25
4:37
5:50
7:04
8:21
9:41
11:04
12:26
1:42
2:47
3:36
4:13
4:40
Sunrise
6:52
6:54
6:54
6:56
6:58
6:58
7:00
7:01
7:03
7:03
7:05
7:07
7:09
7:09
7:11
7:13
Sunset
7:10
7:08
7:07
7:05
7:02
7:00
6:59
6:57
6:54
6:52
6:51
6:49
6:46
6:45
6:43
6:40
Today's sea temperature in Duwamish Waterway is
14.7°C
(Statistics for 20 Sep 1981-2005 – mean: 12.9 max: 15.1 min: 11.0°C)
Issued (local time): 4 am Sunday 20 Sep 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
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