Friday Harbor, San Juan Channel Sea Conditions and Tide Table

Friday Harbor, San Juan Channel 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 —.

Days 1–4 Weather Summary

Heavy rain (total 36mm), heaviest during Tue night. Cool air temperatures (max 10°C on Tue night, min 5°C on Fri morning). Winds decreasing (near gales from the WSW on Tue night, light winds from the SE by Wed night).

Days 5–7 Weather Summary

Heavy rain (total 26mm), heaviest during Sat night. Low air temperatures (max 7°C on Fri night, min 5°C on Fri night). Winds increasing (light winds from the WSW on Sun night, near gales from the SSE by Mon afternoon).

Days 8–10 Weather Summary

Moderate rain (total 15mm), heaviest on Mon night. Mild temperatures (max 7°C on Mon night, min 2°C on Tue night). Winds decreasing (fresh winds from the SE on Wed afternoon, calm by Thu morning).

Days 11–13 Weather Summary

Mostly dry. Freeze-thaw conditions (max 3°C on Thu night, min -1°C on Fri morning). Wind will be generally light.

Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sun
28
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
6:04AM2.41m
12:03PM2.25m
6:34AM2.51m
11:51AM2.26m
7:02AM2.55m
7:28AM2.55m
7:54AM2.56m
8:21AM2.57m
8:48AM2.60m
3:43PM1.98m
9:14AM2.62m
5:03PM1.83m
9:40AM2.63m
6:32PM1.64m
10:04AM2.63m
8:27PM1.45m
10:25AM2.62m
10:53PM1.40m
10:44AM2.61m
Low Tide
9:06PM-0.03m
10:01AM2.23m
9:32PM-0.18m
11:25AM2.26m
10:00PM-0.29m
10:29PM-0.36m
11:00PM-0.39m
11:33PM-0.38m
00:07AM-0.32m
3:16PM1.98m
00:43AM-0.20m
3:49PM1.82m
1:19AM0.01m
4:26PM1.59m
1:54AM0.31m
5:03PM1.29m
2:30AM0.69m
5:42PM0.91m
3:05AM1.13m
6:22PM0.49m
Wave
height (m) 
direction
period (s) 
rain showers
clear
cloud
cloud
light rain
mod rain
rain showers
light rain
light rain
light rain
cloud
part cloud
heavy rain
mod rain
cloud
rain showers
rain showers
rain showers
rain showers
cloud
part cloud
rain showers
light rain
rain showers
rain showers
light rain
part cloud
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
rain shwrs
clear
cloudy
cloudy
light rain
mod rain
rain shwrs
light rain
light rain
light rain
cloudy
some clouds
heavy rain
mod rain
cloudy
rain shwrs
rain shwrs
rain shwrs
rain shwrs
cloudy
some clouds
rain shwrs
light rain
rain shwrs
rain shwrs
light rain
some clouds
clear
clear
some clouds
some clouds
clear
clear
clear
clear
clear
 km/h
50
WSW
40
W
30
WSW
25
SSE
45
SSE
40
SSE
40
WSW
25
SSW
30
WSW
25
SSW
20
SSE
20
SSE
15
S
10
ESE
15
SE
25
SE
20
SE
50
SSE
25
SW
30
WSW
30
WSW
20
SSW
20
SW
30
SSE
15
SSE
5
SE
15
NNE
15
N
15
NNE
10
NNE
10
NE
10
NNE
10
N
10
NNE
10
NNE
10
NNE
 mm 
22
2
8
1
1
2
2
11
6
4
1
2
5
3
2
1
2
2
max°C
10
8
8
7
7
9
7
7
7
7
7
7
7
6
6
6
6
7
7
6
5
5
4
4
6
5
5
3
0
2
2
1
3
3
2
3
Moonrise
6:13
7:19
8:19
9:09
9:48
10:18
10:41
11:00
11:16
11:31
11:46
12:02
Moonset
2:11
2:47
3:34
4:32
5:39
6:51
8:06
9:20
10:35
11:50
1:08
Sunrise
7:58
7:58
8:00
8:00
8:00
8:00
8:02
8:02
8:03
8:03
8:03
8:03
Sunset
4:16
4:16
4:17
4:17
4:19
4:19
4:20
4:20
4:21
4:22
4:22
4:22
Today's sea temperature in Friday Harbor, San Juan Channel is
9.8° C
(Statistics for 16 Dec 1981-2005 – mean: 8.3 max: 9.4 min: 6.6°C)
Issued (local time): 9 pm Tuesday 16 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest