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 08:45 PM.

Days 1–4 Weather Summary

Moderate rain (total 14mm), heaviest on Fri night. Cool air temperatures (max 14°C on Sun afternoon, min 8°C on Thu night). Winds increasing (calm on Fri night, fresh winds from the WSW by Sat night).

Days 5–7 Weather Summary

Light rain (total 2mm), mostly falling on Mon morning. Cool air temperatures (max 13°C on Tue afternoon, min 7°C on Wed morning). Winds decreasing (fresh winds from the SE on Mon afternoon, calm by Wed morning).

Days 8–10 Weather Summary

Some drizzle, heaviest during Wed night. Very mild (max 17°C on Sat afternoon, min 8°C on Wed night). Wind will be generally light.

Days 11–13 Weather Summary

Mostly dry. Warm (max 21°C on Mon afternoon, min 13°C on Sat night). Wind will be generally light.

Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
Wednesday
21
Thursday
22
Friday
23
Saturday
24
Sunday
25
Monday
26
Tue
27
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
10:00PM2.51m
10:44PM2.53m
11:28PM2.55m
00:08AM2.56m
00:43AM2.55m
1:11AM2.53m
11:38AM1.42m
1:36AM2.50m
2:01PM1.49m
1:56AM2.48m
3:54PM1.74m
2:14AM2.48m
5:20PM2.06m
6:26PM2.35m
7:24PM2.56m
Low Tide
1:45PM-0.30m
2:26PM-0.23m
3:12PM-0.11m
4:00PM0.08m
4:52PM0.34m
8:11AM1.27m
5:50PM0.68m
8:35AM0.87m
6:54PM1.05m
9:05AM0.41m
8:01PM1.43m
9:40AM-0.05m
9:06PM1.77m
10:17AM-0.46m
10:10PM2.05m
10:57AM-0.76m
11:14PM2.25m
11:39AM-0.93m
Wave
height (m) 
direction
period (s) 
light rain
light rain
light rain
light rain
cloud
light rain
light rain
cloud
part cloud
part cloud
light rain
cloud
part cloud
part cloud
clear
part cloud
light rain
part cloud
rain showers
cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
cloud
light rain
light rain
light rain
light rain
cloudy
light rain
light rain
cloudy
some clouds
some clouds
light rain
cloudy
some clouds
some clouds
clear
some clouds
light rain
some clouds
rain shwrs
cloudy
some clouds
clear
clear
clear
clear
some clouds
some clouds
clear
clear
clear
clear
clear
some clouds
some clouds
some clouds
cloudy
 km/h
10
SSE
20
SE
20
SE
10
ESE
10
SW
20
WSW
25
WSW
10
SW
15
WSW
10
S
25
SE
30
SE
15
SSW
15
SSE
30
SW
15
WSW
5
W
20
SSW
10
WSW
15
SSE
10
SSW
10
W
5
SSW
10
WSW
0
W
0
SSE
5
W
0
NNE
5
NNW
5
WNW
0
N
10
NW
10
SW
15
SSW
15
SW
20
WSW
 mm 
3
2
1
5
2
1
1
1
1
max°C
9
9
10
10
10
11
11
11
14
12
8
10
10
10
13
13
8
10
10
10
13
13
10
13
14
11
17
17
16
20
20
17
21
20
14
18
Moonrise
12:32
1:14
1:47
2:11
2:31
2:48
3:04
3:20
3:37
3:59
4:28
5:09
Moonset
6:51
7:49
8:57
10:11
11:29
12:48
2:08
3:29
4:53
6:21
7:52
9:22
10:43
Sunrise
5:30
5:28
5:28
5:26
5:24
5:24
5:22
5:22
5:20
5:20
5:18
5:18
Sunset
8:45
8:46
8:47
8:49
8:50
8:52
8:52
8:53
8:54
8:55
8:58
8:59
9:00
Today's sea temperature in Friday Harbor, San Juan Channel is 10.6 °C (Statistics for 15 May 1981-2005 – mean: 11.8 max: 13.4 min: 10.6°C)
Issued (local time): 10 pm Thursday 15 May 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest