Weather Forecast for San Juan Islands
Washington, United States of America
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Current Weather - San Juan Islands: 11°C
Current Weather - San Juan Islands: 11°C
Washington, United States of America
Partly cloudy
Feels like 9°C
Wind
13 km/h W
Humidity
88%
Pressure
1014 mb
UV Index
0
Visibility
16 km
Sunny
Wednesday, July 29, 2026
High
22°C
Low
11°C
Rain Chance
7%
Hourly Forecast
21°C
22°C
16°C
16°C
16°C
16°C
16°C
15°C
14°C
14°C
14°C
Day Statistics
Maximum Wind
19 km/h
Humidity
74%
Precipitation
0 mm
UV Index
7
Visibility
10 km
Rain Chance
7%
Snow Chance
0%
Sun & Moon
Sunrise
05:42 AM
Sunset
08:54 PM
Moonrise
09:19 PM
Moonset
05:52 AM
Moon Phase
Full Moon
Moon Illumination
99%
Air Quality
PM2.5
6.2
μg/m³
PM10
8.4
μg/m³
NO₂
10.7
μg/m³
O₃
41.9
μg/m³
SO₂
1.1
μg/m³
CO
101.1
μg/m³
Sunny
Thursday, July 30, 2026
High
18°C
Low
12°C
Rain Chance
8%
Hourly Forecast
13°C
13°C
13°C
12°C
12°C
12°C
12°C
13°C
13°C
14°C
14°C
14°C
14°C
15°C
15°C
15°C
16°C
17°C
18°C
18°C
17°C
15°C
14°C
14°C
Day Statistics
Maximum Wind
20 km/h
Humidity
75%
Precipitation
0 mm
UV Index
7
Visibility
10 km
Rain Chance
8%
Snow Chance
0%
Sun & Moon
Sunrise
05:44 AM
Sunset
08:52 PM
Moonrise
09:36 PM
Moonset
07:01 AM
Moon Phase
Waning Gibbous
Moon Illumination
96%
Air Quality
PM2.5
6.8
μg/m³
PM10
9.3
μg/m³
NO₂
8.6
μg/m³
O₃
50
μg/m³
SO₂
1
μg/m³
CO
90.3
μg/m³
Sunny
Friday, July 31, 2026
High
18°C
Low
13°C
Rain Chance
7%
Hourly Forecast
14°C
14°C
13°C
13°C
13°C
13°C
13°C
13°C
14°C
15°C
15°C
16°C
16°C
17°C
17°C
17°C
18°C
17°C
17°C
17°C
16°C
15°C
15°C
15°C
Day Statistics
Maximum Wind
19 km/h
Humidity
73%
Precipitation
0 mm
UV Index
7
Visibility
10 km
Rain Chance
7%
Snow Chance
0%
Sun & Moon
Sunrise
05:45 AM
Sunset
08:51 PM
Moonrise
09:50 PM
Moonset
08:10 AM
Moon Phase
Waning Gibbous
Moon Illumination
91%
Air Quality
PM2.5
7
μg/m³
PM10
9.1
μg/m³
NO₂
11.8
μg/m³
O₃
34.5
μg/m³
SO₂
1
μg/m³
CO
110.3
μg/m³
Sunny
Saturday, August 01, 2026
High
19°C
Low
13°C
Rain Chance
36%
Hourly Forecast
14°C
14°C
14°C
13°C
13°C
13°C
14°C
14°C
15°C
16°C
15°C
14°C
15°C
16°C
18°C
18°C
19°C
19°C
18°C
17°C
17°C
15°C
15°C
15°C
Day Statistics
Maximum Wind
31 km/h
Humidity
78%
Precipitation
0 mm
UV Index
4
Visibility
10 km
Rain Chance
36%
Snow Chance
0%
Sun & Moon
Sunrise
05:46 AM
Sunset
08:50 PM
Moonrise
10:03 PM
Moonset
09:17 AM
Moon Phase
Waning Gibbous
Moon Illumination
83%
Air Quality
PM2.5
3.3
μg/m³
PM10
4.9
μg/m³
NO₂
4.6
μg/m³
O₃
46.2
μg/m³
SO₂
0.8
μg/m³
CO
95.6
μg/m³
Sunny
Sunday, August 02, 2026
High
16°C
Low
12°C
Rain Chance
11%
Hourly Forecast
14°C
14°C
14°C
13°C
13°C
12°C
12°C
12°C
13°C
14°C
14°C
15°C
15°C
16°C
16°C
16°C
16°C
15°C
15°C
15°C
14°C
14°C
13°C
13°C
Day Statistics
Maximum Wind
24 km/h
Humidity
80%
Precipitation
0 mm
UV Index
5
Visibility
10 km
Rain Chance
11%
Snow Chance
0%
Sun & Moon
Sunrise
05:48 AM
Sunset
08:48 PM
Moonrise
10:16 PM
Moonset
10:25 AM
Moon Phase
Waning Gibbous
Moon Illumination
75%
Air Quality
PM2.5
2.6
μg/m³
PM10
4.2
μg/m³
NO₂
3.5
μg/m³
O₃
48.3
μg/m³
SO₂
0.9
μg/m³
CO
102
μg/m³
Sunny
Monday, August 03, 2026
High
18°C
Low
12°C
Rain Chance
9%
Hourly Forecast
13°C
13°C
12°C
12°C
12°C
12°C
12°C
13°C
13°C
14°C
15°C
16°C
17°C
17°C
18°C
17°C
17°C
16°C
16°C
15°C
15°C
14°C
14°C
14°C
Day Statistics
Maximum Wind
15 km/h
Humidity
79%
Precipitation
0 mm
UV Index
5
Visibility
10 km
Rain Chance
9%
Snow Chance
0%
Sun & Moon
Sunrise
05:49 AM
Sunset
08:47 PM
Moonrise
10:31 PM
Moonset
11:34 AM
Moon Phase
Last Quarter
Moon Illumination
65%
Sunny
Tuesday, August 04, 2026
High
17°C
Low
12°C
Rain Chance
11%
Hourly Forecast
13°C
13°C
13°C
13°C
12°C
12°C
13°C
13°C
13°C
14°C
15°C
16°C
16°C
17°C
17°C
17°C
16°C
16°C
16°C
16°C
16°C
15°C
14°C
14°C
Day Statistics
Maximum Wind
23 km/h
Humidity
80%
Precipitation
0 mm
UV Index
5
Visibility
10 km
Rain Chance
11%
Snow Chance
0%
Sun & Moon
Sunrise
05:50 AM
Sunset
08:45 PM
Moonrise
10:48 PM
Moonset
12:45 PM
Moon Phase
Last Quarter
Moon Illumination
55%
Weather Alerts
Small Craft Advisory issued July 29 at 12:15AM PDT until July 30 at 5:00AM PDT by NWS Seattle WA
* WHAT...West winds 15 to 25 kt. * WHERE...Central U. S. Waters Strait Of Juan De Fuca and East Entrance U. S. Waters Strait Of Juan De Fuca. * WHEN...From 7 PM this evening to 5 AM PDT Thursday. * IMPACTS...Conditions will be hazardous to small craft.
A Small Craft Advisory means that wind speeds of 21 to 33 knots and/or seas 10 feet or higher are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels should avoid navigating in these conditions.
Small Craft Advisory issued July 29 at 1:15AM PDT until July 30 at 5:00AM PDT by NWS Seattle WA
* WHAT...West winds 15 to 25 kt. * WHERE...Central U. S. Waters Strait Of Juan De Fuca and East Entrance U. S. Waters Strait Of Juan De Fuca. * WHEN...From 7 PM this evening to 5 AM PDT Thursday. * IMPACTS...Conditions will be hazardous to small craft.
A Small Craft Advisory means that wind speeds of 21 to 33 knots and/or seas 10 feet or higher are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels should avoid navigating in these conditions.
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