Weather Forecast for San Juan Islands
Washington, United States of America
Share this weather forecast
Current Weather - San Juan Islands: 26°C
Current Weather - San Juan Islands: 26°C
Washington, United States of America
Sunny
Feels like 27°C
Wind
23 km/h S
Humidity
47%
Pressure
1016 mb
UV Index
7
Visibility
10 km
Sunny
Thursday, July 23, 2026
High
27°C
Low
15°C
Rain Chance
7%
Hourly Forecast
15°C
Day Statistics
Maximum Wind
32 km/h
Humidity
68%
Precipitation
0 mm
UV Index
8
Visibility
10 km
Rain Chance
7%
Snow Chance
0%
Sun & Moon
Sunrise
05:35 AM
Sunset
09:01 PM
Moonrise
05:15 PM
Moonset
12:27 AM
Moon Phase
Waxing Gibbous
Moon Illumination
74%
Air Quality
PM2.5
4.8
μg/m³
PM10
5.8
μg/m³
NO₂
6
μg/m³
O₃
63
μg/m³
SO₂
0.6
μg/m³
CO
111.3
μg/m³
Sunny
Friday, July 24, 2026
High
18°C
Low
13°C
Rain Chance
12%
Hourly Forecast
15°C
15°C
14°C
14°C
13°C
13°C
13°C
13°C
13°C
14°C
15°C
16°C
16°C
17°C
17°C
17°C
18°C
18°C
18°C
18°C
17°C
17°C
17°C
17°C
Day Statistics
Maximum Wind
27 km/h
Humidity
81%
Precipitation
0 mm
UV Index
7
Visibility
10 km
Rain Chance
12%
Snow Chance
0%
Sun & Moon
Sunrise
05:36 AM
Sunset
09:00 PM
Moonrise
06:21 PM
Moonset
12:59 AM
Moon Phase
Waxing Gibbous
Moon Illumination
82%
Air Quality
PM2.5
5
μg/m³
PM10
6.4
μg/m³
NO₂
7.6
μg/m³
O₃
50.8
μg/m³
SO₂
0.7
μg/m³
CO
101
μg/m³
Sunny
Saturday, July 25, 2026
High
18°C
Low
13°C
Rain Chance
14%
Hourly Forecast
16°C
15°C
14°C
14°C
14°C
14°C
13°C
14°C
14°C
14°C
15°C
15°C
15°C
15°C
16°C
17°C
18°C
18°C
17°C
17°C
16°C
16°C
16°C
15°C
Day Statistics
Maximum Wind
26 km/h
Humidity
79%
Precipitation
0 mm
UV Index
5
Visibility
10 km
Rain Chance
14%
Snow Chance
0%
Sun & Moon
Sunrise
05:37 AM
Sunset
08:59 PM
Moonrise
07:16 PM
Moonset
01:41 AM
Moon Phase
Waxing Gibbous
Moon Illumination
90%
Air Quality
PM2.5
5.6
μg/m³
PM10
7.2
μg/m³
NO₂
8.2
μg/m³
O₃
50.9
μg/m³
SO₂
1
μg/m³
CO
92.3
μg/m³
Partly Cloudy
Sunday, July 26, 2026
High
17°C
Low
13°C
Rain Chance
52%
Hourly Forecast
14°C
14°C
14°C
14°C
13°C
13°C
13°C
13°C
14°C
14°C
15°C
15°C
16°C
17°C
17°C
17°C
16°C
16°C
16°C
15°C
15°C
15°C
15°C
15°C
Day Statistics
Maximum Wind
14 km/h
Humidity
87%
Precipitation
1 mm
UV Index
5
Visibility
8 km
Rain Chance
52%
Snow Chance
0%
Sun & Moon
Sunrise
05:39 AM
Sunset
08:58 PM
Moonrise
08:00 PM
Moonset
02:34 AM
Moon Phase
Waxing Gibbous
Moon Illumination
95%
Air Quality
PM2.5
5.1
μg/m³
PM10
6.8
μg/m³
NO₂
10.5
μg/m³
O₃
39.6
μg/m³
SO₂
1.4
μg/m³
CO
96.6
μg/m³
Sunny
Monday, July 27, 2026
High
17°C
Low
13°C
Rain Chance
29%
Hourly Forecast
15°C
14°C
14°C
14°C
13°C
13°C
13°C
13°C
13°C
13°C
14°C
14°C
15°C
16°C
16°C
17°C
17°C
17°C
17°C
16°C
15°C
15°C
15°C
14°C
Day Statistics
Maximum Wind
12 km/h
Humidity
87%
Precipitation
0 mm
UV Index
5
Visibility
7 km
Rain Chance
29%
Snow Chance
0%
Sun & Moon
Sunrise
05:40 AM
Sunset
08:56 PM
Moonrise
08:34 PM
Moonset
03:35 AM
Moon Phase
Full Moon
Moon Illumination
99%
Air Quality
PM2.5
7.5
μg/m³
PM10
11.8
μg/m³
NO₂
4.7
μg/m³
O₃
52.2
μg/m³
SO₂
1.2
μg/m³
CO
93.7
μg/m³
Sunny
Tuesday, July 28, 2026
High
18°C
Low
13°C
Rain Chance
11%
Hourly Forecast
14°C
14°C
13°C
13°C
13°C
13°C
13°C
14°C
14°C
14°C
15°C
15°C
16°C
16°C
16°C
17°C
17°C
18°C
18°C
18°C
18°C
17°C
16°C
15°C
Day Statistics
Maximum Wind
21 km/h
Humidity
80%
Precipitation
0 mm
UV Index
5
Visibility
10 km
Rain Chance
11%
Snow Chance
0%
Sun & Moon
Sunrise
05:41 AM
Sunset
08:55 PM
Moonrise
08:59 PM
Moonset
04:43 AM
Moon Phase
Full Moon
Moon Illumination
100%
Sunny
Wednesday, July 29, 2026
High
17°C
Low
14°C
Rain Chance
12%
Hourly Forecast
14°C
14°C
14°C
14°C
14°C
14°C
14°C
15°C
15°C
15°C
16°C
16°C
17°C
17°C
17°C
17°C
16°C
16°C
16°C
16°C
16°C
15°C
15°C
14°C
Day Statistics
Maximum Wind
17 km/h
Humidity
82%
Precipitation
0 mm
UV Index
5
Visibility
10 km
Rain Chance
12%
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%
Solar Radiation Data
Shortwave Radiation
777.78
Diffuse Radiation
213.38
DNI
0
GTI
0
Weather Alerts
Small Craft Advisory issued July 23 at 2:24AM PDT until July 23 at 9:00AM PDT by NWS Seattle WA
* WHAT...South winds 15 to 25 kt. * WHERE...Northern Inland Waters Including The San Juan Islands. * WHEN...Until 9 AM PDT this morning. * 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 23 at 8:55AM PDT until July 23 at 9:00AM PDT by NWS Seattle WA
Winds have started to subside and will continue to subside into the afternoon hours.
Your guide to the flawless travel experience
Popular Countries
Get our app
