San Juan County Weather Forecast

Current Conditions & 10-Day Outlook

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Current Weather Conditions in San Juan County

San Juan County

Washington, United States

weather iconClear sky
20°
Low 12°
High 25°

Hourly San Juan County Weather Forecast

12 AMweather icon21°
1 AMweather icon21°
2 AMweather icon21°
3 AMweather icon20°
4 AMweather icon17°
5 AMweather icon15°
6 AMweather icon14°
7 AMweather icon13°
8 AMweather icon13°
9 AMweather icon13°
10 AMweather icon13°
11 AMweather icon13°
12 PMweather icon12°
1 PMweather icon14°
2 PMweather icon15°
3 PMweather icon16°
4 PMweather icon17°
5 PMweather icon19°
6 PMweather icon20°
7 PMweather icon21°
8 PMweather icon22°
9 PMweather icon23°
10 PMweather icon24°
11 PMweather icon25°
Wind
4kt W

Very gentle wind.

4kt
NESW
Precipitation
0%

Minimal chance of precipitation.

San Juan County 10-Day Weather Outlook

Today's Weather in San Juan County, Washington, United States

Sat, Jun 13

Showers svg
12°
25°

Sun, Jun 14

Showers svg
15°
27°

Mon, Jun 15

Showers svg
15°
27°

Tue, Jun 16

Showers svg
15°
26°

Wed, Jun 17

Showers svg
10°
22°

Thu, Jun 18

Showers svg
11°
22°

Fri, Jun 19

Showers svg
10°
22°

Sat, Jun 20

Showers svg
11°
21°

Sun, Jun 21

Showers svg
11°
24°

Feels like

19°

Feels cooler than actual temperature.

Pressure

1016 hPa

Expect clear and stable weather.

Humidity

52%

Moderate humidity.

UV

7 - High

Take precautions.

Gusts

15kt

Max speed of wind gusts today.

Cloud Cover

0%

Clear skies, no clouds expected.

Daylight

16h 5m

Long days, short nights.

Rain

0.0mm

No rain, dry conditions expected.

Snowfall

0.0mm

No snowfall expected.

Marine Weather Forecasts
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Historical Climate Data

10 year average

View All

Current Air Quality in San Juan County

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About San Juan County Weather

General

This page provides the current weather forecast for San Juan County, Washington, United States, including hourly conditions, a 10-day outlook, wind speed and direction, precipitation, UV index, and air quality - giving you everything you need to plan your day in one view.

Forecast & Methodology

The forecast data on this page is sourced from the ECMWF open-source model - a reliable global model used widely across weather services worldwide. For sailors, boaters, and mariners who need greater accuracy and higher resolution, PredictWind's proprietary forecast models deliver precision down to 1km resolution, updated multiple times daily and validated against real-world observations. Sign up free to access PredictWind's advanced forecasts.

Sailing & Marine Conditions

San Juan County weather forecasts on PredictWind are optimised for sailors and boaters who need precise, reliable wind and wave data for passage planning and day sailing. PredictWind is used by ocean racers, cruising sailors, and commercial vessel operators across United States and worldwide. For detailed marine conditions including wave height, swell period, and offshore wind forecasts, see the San Juan County marine forecast.

Units

Wind speed is displayed in knots - the standard unit used by sailors, weather services, and maritime authorities. Temperature is shown in degrees Celsius. Use the toggle at the top of the page to switch between Celsius and Fahrenheit. Pressure is shown in hPa, rainfall in millimetres, and air quality is available in both US and EU AQI standards.