Mercer Island Sea Conditions and Tide Table

Mercer 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 07:30 PM.

Days 1–4 Weather Summary

Moderate rain (total 11mm), heaviest on Sun afternoon. Icy conditions (max 12°C on Fri afternoon, min 0°C on Mon morning). Wind will be generally light.

Days 5–7 Weather Summary

Heavy rain (total 26mm), heaviest during Wed morning. Cool air temperatures (max 11°C on Tue afternoon, min 2°C on Mon night). Wind will be generally light.

Days 8–10 Weather Summary

Mostly dry. Very mild (max 12°C on Fri afternoon, min 4°C on Sat morning). Wind will be generally light.

Days 11–13 Weather Summary

Mostly dry. Warm (max 20°C on Tue afternoon, min 7°C on Sun night). Wind will be generally light.

Fri
27
Saturday
28
Sunday
29
Monday
30
Tuesday
31
Wednesday
1
Thursday
2
Friday
3
Saturday
4
Sunday
5
Monday
6
Tuesday
7
Wednesday
8
Thursday
9
Friday
10
Saturday
11
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
2:51AM3.08m
11:46AM2.62m
3:16AM3.08m
1:24PM2.60m
3:36AM3.07m
2:41PM2.63m
3:54AM3.04m
3:48PM2.69m
4:10AM3.01m
4:48PM2.75m
4:25AM2.98m
5:45PM2.80m
6:41PM2.83m
7:37PM2.84m
5:08AM2.89m
8:39PM2.83m
5:22AM2.87m
9:53PM2.80m
5:33AM2.84m
11:29PM2.80m
5:35AM2.82m
1:05AM2.85m
1:51AM2.91m
Low Tide
6:36PM0.64m
8:25AM2.47m
7:34PM0.74m
9:01AM2.19m
8:24PM0.90m
9:34AM1.88m
9:08PM1.11m
10:06AM1.57m
9:48PM1.37m
10:37AM1.27m
10:27PM1.64m
11:08AM1.02m
11:04PM1.91m
11:39AM0.84m
11:40PM2.16m
12:11PM0.73m
00:17AM2.36m
12:47PM0.70m
00:53AM2.53m
1:26PM0.72m
1:31AM2.66m
2:11PM0.79m
2:22AM2.76m
3:03PM0.86m
4:01PM0.91m
Wave
height (m) 
direction
period (s) 
part cloud
cloud
cloud
cloud
part cloud
cloud
light rain
rain showers
clear
clear
part cloud
cloud
cloud
light rain
heavy rain
rain showers
rain showers
light rain
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
clear
cloud
clear
clear
part cloud
cloud
cloud
rain showers
part cloud
cloud
part cloud
part cloud
clear
clear
clear
clear
clear
some clouds
cloudy
cloudy
cloudy
some clouds
cloudy
light rain
rain shwrs
clear
clear
some clouds
cloudy
cloudy
light rain
heavy rain
rain shwrs
rain shwrs
light rain
some clouds
some clouds
some clouds
some clouds
some clouds
clear
clear
clear
clear
clear
some clouds
some clouds
clear
cloudy
clear
clear
some clouds
cloudy
cloudy
rain shwrs
some clouds
cloudy
some clouds
some clouds
clear
clear
clear
clear
clear
 km/h
15
NNW
5
NE
5
N
10
N
5
E
10
SSW
5
NNW
10
S
5
S
5
ENE
5
NE
5
N
5
W
5
S
10
S
15
SSW
10
S
0
W
10
S
5
SSE
5
S
5
N
5
NNE
10
N
10
NNW
5
NNE
10
N
10
NNW
5
NNE
5
NNW
5
NW
5
NNW
5
WSW
5
W
10
S
15
SSW
15
SW
15
SSW
5
NW
5
N
5
NE
5
NNW
10
NNW
0
NNE
5
NW
10
NNW
0
ENE
 mm 
5
6
2
15
5
3
1
4
max°C
12
8
9
12
6
7
8
3
5
9
7
7
11
9
7
8
6
5
9
8
8
12
10
8
12
9
9
15
11
13
19
14
15
20
13
12
13
8
7
10
9
9
14
11
12
18
14
Moonrise
2:49
4:06
5:20
6:32
7:43
8:54
10:04
11:14
12:22
1:25
2:20
3:05
3:40
4:08
Moonset
5:17
5:38
5:56
6:12
6:27
6:42
6:59
7:20
7:45
8:17
8:58
9:49
10:50
11:58
1:10
Sunrise
6:56
6:54
6:52
6:50
6:48
6:46
6:43
6:41
6:39
6:37
6:35
6:33
6:31
6:30
6:28
Sunset
7:30
7:31
7:32
7:35
7:36
7:37
7:38
7:40
7:42
7:43
7:45
7:45
7:47
7:49
7:50
7:52
Today's sea temperature in Mercer Island is
8.6° C
(Statistics for 27 Mar 1981-2005 – mean: 8.7 max: 10.3 min: 7.5°C)
Issued (local time): 4 pm Friday 27 Mar 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest