Roche Harbor, San Juan Island Sea Conditions and Tide Table

Roche Harbor, San Juan 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 07:13 AM and sunset is at 05:38 PM.

Days 1–3 Weather Summary

Moderate rain (total 13mm), heaviest on Wed morning. Low air temperatures (max 9°C on Thu morning, min 6°C on Tue morning). Wind will be generally light.

Days 4–6 Weather Summary

Heavy rain (total 39mm), heaviest during Sun night. Cool air temperatures (max 10°C on Sat night, min 7°C on Fri morning). Winds decreasing (fresh winds from the SSE on Sat afternoon, calm by Sat night).

Days 7–9 Weather Summary

Some drizzle, heaviest during Mon morning. Very mild (max 10°C on Mon afternoon, min 4°C on Wed night). Winds decreasing (fresh winds from the WSW on Mon morning, calm by Tue afternoon).

Days 10–12 Weather Summary

Mostly dry. Mild temperatures (max 9°C on Thu afternoon, min 4°C on Thu morning). Wind will be generally light.

Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
1
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
7:49AM2.30m
10:05PM1.69m
8:09AM2.27m
8:30AM2.23m
8:51AM2.20m
3:36AM2.23m
9:16AM2.18m
3:57AM2.34m
10:10AM2.15m
4:16AM2.40m
11:43AM2.13m
4:35AM2.43m
1:10PM2.14m
4:54AM2.44m
2:24PM2.16m
5:14AM2.44m
3:30PM2.18m
5:35AM2.46m
4:34PM2.17m
5:58AM2.49m
5:39PM2.14m
6:23AM2.51m
Low Tide
3:05PM0.44m
2:04AM1.53m
3:55PM0.33m
4:49PM0.23m
5:47PM0.14m
7:27AM2.15m
6:45PM0.04m
8:50AM2.14m
7:39PM-0.09m
9:17AM2.07m
8:27PM-0.20m
9:35AM1.95m
9:11PM-0.28m
9:59AM1.75m
9:52PM-0.29m
10:31AM1.48m
10:31PM-0.20m
11:09AM1.16m
11:11PM0.01m
11:51AM0.80m
11:50PM0.32m
Wave
height (m) 
direction
period (s) 
cloud
cloud
light rain
light rain
light rain
light rain
cloud
cloud
light rain
light rain
light rain
cloud
cloud
mod rain
light rain
light rain
cloud
heavy rain
rain showers
cloud
cloud
part cloud
clear
part cloud
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
cloudy
cloudy
light rain
light rain
light rain
light rain
cloudy
cloudy
light rain
light rain
light rain
cloudy
cloudy
mod rain
light rain
light rain
cloudy
heavy rain
rain shwrs
cloudy
cloudy
some clouds
clear
some clouds
clear
clear
clear
clear
some clouds
clear
clear
clear
clear
clear
clear
clear
 km/h
10
E
15
ENE
25
E
15
NE
10
N
5
ESE
10
S
20
SE
20
SE
15
SE
20
SE
15
SE
25
SE
35
SSE
10
SSE
5
NNW
10
NE
10
E
20
WSW
20
SW
10
E
5
NW
5
S
5
NNE
15
N
15
NNW
15
N
15
N
10
N
10
NNE
10
N
10
N
10
N
15
N
10
N
10
N
 mm 
5
5
1.0
1.0
1.0
2.0
3
7
3
2.0
22
1.0
max°C
7
8
7
6
7
7
9
9
8
8
8
7
9
9
10
8
9
8
9
10
8
8
8
8
6
8
7
6
9
7
7
8
7
7
9
9
Moonrise
12:43
1:54
3:04
4:08
5:03
5:47
6:20
6:45
7:05
7:22
7:38
Moonset
9:11
9:30
9:56
10:30
11:17
12:18
1:32
2:55
4:20
5:46
7:12
8:37
Sunrise
7:13
7:11
7:09
7:09
7:07
7:05
7:03
7:01
6:58
6:56
6:54
6:52
Sunset
5:38
5:39
5:42
5:43
5:45
5:46
5:47
5:50
5:51
5:52
5:54
5:55
Today's sea temperature in Roche Harbor, San Juan Island is 7.5 °C (Statistics for 18 Feb 1981-2005 – mean: 7.8 max: 9.3 min: 6.0°C)
Issued (local time): 9 am Tuesday 18 Feb 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest