Water Temperature of Friday Harbor in Friday Harbor, WA

Current Water Temperature

53.1°F

Measurement Time: Monday, September 15, 2025, 7:12 AM PDT

Today's Tides

 Low: September 15, 5:44 AM, -0.89 ft
High: September 15, 3:01 PM, 7.60 ft

Temperature Locations

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Local Points of Interest

Brown Island; San Juan Island; Shaw Island; San Juan Channel

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Friday Harbor

Station Name: Friday Harbor
Data Source: NOAA Tides and Currents

Elevation Above Sea Level: 66 feet / 20 meters

Sensor Depth: -5.7 feet / -1.7 meters

Nearest Address:
Cantilever Way
Friday Harbor, WA 98250
San Juan County

GPS Coordinates: 48.546700, -123.010002

Nearby Water Temperatures

Nooksack River, Ferndale, WA (28.1 mi)
Skagit River, Burlington, WA (31.7 mi)
Port Townsend Bay, Port Townsend, WA (32.2 mi)
Port Angeles Harbor, Port Angeles, WA (35.2 mi)
Fishtrap Creek, Lynden, WA (36.3 mi)
Anderson Creek, Goshen, WA (36.4 mi)
Strait of Juan de Fuca, Angeles Point, WA (37.7 mi)
Nooksack River, Cedarville, WA (38.5 mi)
Bertrand Creek, Aldergrove, BC (62.0 km)
Bertrand Creek, Delta, WA (38.9 mi)
South Fork Nooksack River, Doran, WA (39.6 mi)
Skookum Creek, Doran, WA (40.7 mi)
Salish Sea, Vancouver, BC (87.6 km)
North Fork Nooksack River, Glacier, WA (58.6 mi)
Salish Sea, Roberts Creek, BC (102.7 km)

Weather for Friday Harbor, Washington

Current Weather

53.1°F
Overcast
Conditions: Overcast
Humidity: 89%
Feels Like: 51.1°F
Wind: SW 6.5 mph
Wind Gusts: 11.2 mph
Pressure: 30.19 in
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Partly Cloudy
Mon
H: 58°F
L: 51°F
Mist
Tue
H: 60°F
L: 51°F
Partly Cloudy
Wed
H: 61°F
L: 51°F
Sunny
Thu
H: 62°F
L: 54°F
Partly Cloudy
Fri
H: 59°F
L: 54°F

Air Quality

AQI: 1 - Good
PM2.5: 20.54 μg/m3
PM10: 27.57 μg/m3
Carbon Monoxide: 273.8 μg/m3
Nitrogen Dioxide: 19.98 μg/m3
Sulphur Dioxide: 1.48 μg/m3
Ozone: 57 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 1:07 PM
Sunset: 7:23 PM
Daylight: 12 hrs 34 mins
Moonrise: 12:18 AM
Moon Transit: 8:10 AM
Moonset: 4:55 PM
Moon Phase: Last Quarter
Moon Illumination: 34.0%

Best Times for Fishing or Hunting

Major Periods

7:40 AM - 10:10 AM
3:35 PM - 6:05 PM

Minor Periods

4:25 PM - 5:55 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Fire Weather Watch issued September 15 at 1:40AM PDT until September 16 at 11:00PM PDT by NWS Seattle WA

Effective: Mon September 15, 2025, 1:40 AM
Expires: Mon September 15, 2025, 1:00 PM

* AFFECTED AREA...Fire Weather Zone 655 Black Hills and Southwest Interior Lowlands, Fire Weather Zone 656 Northeast Puget Sound Lowlands Generally Below 1500 Feet, Fire Weather Zone 657 Southeast Puget Sound Lowlands Generally Below 1500 Feet, Fire Weather Zone 658 West Slopes of the North Cascades Generally above 1500 Feet and Fire Weather Zone 659 West Slopes of the Central Cascades Generally above 1500 Feet. * WINDS...East 10 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...25 to 30 percent. * IMPACTS...A combination of moderate breezes, low relative humidity, and warm temperatures can contribute to rapid rates of spread and down-wind spotting on existing fires. If a fire were to begin, air quality may diminish in the surrounding area. * ADDITIONAL DETAILS...Winds will be greatest along the gaps of the Cascades, mainly for areas north of the Gifford Pinchot National Forest.

A Fire Weather Watch means that there is a potential for critical fire weather conditions to develop. Monitor the forecasts for possible Red Flag Warnings.
Monday, September 15, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 54.3°F
Average Humidity: 88%
Chance of Rain: 0%
Wind: 11.9 mph
UV Index: 1.1

Air Quality

AQI: 1 - Good
PM2.5: 10.9 μg/m3
PM10: 15.02 μg/m3
Carbon Monoxide: 262.26 μg/m3
Nitrogen Dioxide: 12.12 μg/m3
Sulphur Dioxide: 1.14 μg/m3
Ozone: 60.84 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 1:07 PM
Sunset: 7:23 PM
Daylight: 12 hrs 34 mins
Moonrise: 12:18 AM
Moon Transit: 8:10 AM
Moonset: 4:55 PM
Moon Phase: Last Quarter
Moon Illumination: 34.0%

Best Times for Fishing or Hunting

Major Periods

7:40 AM - 10:10 AM
3:35 PM - 6:05 PM

Minor Periods

4:25 PM - 5:55 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Tuesday, September 16, 2025

Weather Forecast

Conditions: Mist
Average Temperature: 55.3°F
Average Humidity: 88%
Chance of Rain: 0%
Wind: 8.9 mph
UV Index: 1.1

Air Quality

AQI: 2 - Moderate
PM2.5: 19.23 μg/m3
PM10: 21.78 μg/m3
Carbon Monoxide: 397.68 μg/m3
Nitrogen Dioxide: 29.27 μg/m3
Sulphur Dioxide: 3.88 μg/m3
Ozone: 59.44 μg/m3

Astronomical

Sunrise: 6:51 AM
Sun Transit: 1:06 PM
Sunset: 7:21 PM
Daylight: 12 hrs 30 mins
Moonrise: 12:31 AM
Moon Transit: 9:09 AM
Moonset: 5:33 PM
Moon Phase: Last Quarter
Moon Illumination: 23.8%

Best Times for Fishing or Hunting

Major Periods

8:39 AM - 11:09 AM
4:33 PM - 7:03 PM

Minor Periods

5:03 PM - 6:33 PM
12:01 AM - 1:31 AM

Action Rating: 3 out of 5

Wednesday, September 17, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 56.3°F
Average Humidity: 84%
Chance of Rain: 0%
Wind: 10.5 mph
UV Index: 1.1

Air Quality

AQI: 2 - Moderate
PM2.5: 20.34 μg/m3
PM10: 23.14 μg/m3
Carbon Monoxide: 367.26 μg/m3
Nitrogen Dioxide: 23.57 μg/m3
Sulphur Dioxide: 2.46 μg/m3
Ozone: 67.76 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 1:06 PM
Sunset: 7:19 PM
Daylight: 12 hrs 27 mins
Moonrise: 1:49 AM
Moon Transit: 10:03 AM
Moonset: 6:00 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.9%

Best Times for Fishing or Hunting

Major Periods

5:25 PM - 7:55 PM
9:33 AM - 12:03 AM

Minor Periods

5:30 PM - 7:00 PM
1:19 AM - 2:49 AM

Action Rating: 3 out of 5

Thursday, September 18, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 57.1°F
Average Humidity: 85%
Chance of Rain: 0%
Wind: 5.8 mph
UV Index: 1

Air Quality

AQI: 1 - Good
PM2.5: 9.89 μg/m3
PM10: 12.93 μg/m3
Carbon Monoxide: 284.23 μg/m3
Nitrogen Dioxide: 14.81 μg/m3
Sulphur Dioxide: 2.08 μg/m3
Ozone: 62.12 μg/m3

Astronomical

Sunrise: 6:54 AM
Sun Transit: 1:05 PM
Sunset: 7:17 PM
Daylight: 12 hrs 23 mins
Moonrise: 3:09 AM
Moon Transit: 10:53 AM
Moonset: 6:21 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

6:14 PM - 8:44 PM
10:23 AM - 12:53 AM

Minor Periods

5:51 PM - 7:21 PM
2:39 AM - 4:09 AM

Action Rating: 3 out of 5

Friday, September 19, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 56.3°F
Average Humidity: 83%
Chance of Rain: 0%
Wind: 11.2 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 14.15 μg/m3
PM10: 17.72 μg/m3
Carbon Monoxide: 341.4 μg/m3
Nitrogen Dioxide: 28.72 μg/m3
Sulphur Dioxide: 3.12 μg/m3
Ozone: 60.54 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 1:05 PM
Sunset: 7:15 PM
Daylight: 12 hrs 20 mins
Moonrise: 4:26 AM
Moon Transit: 11:39 AM
Moonset: 6:37 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.8%

Best Times for Fishing or Hunting

Major Periods

6:59 PM - 9:29 PM
11:09 AM - 1:39 PM

Minor Periods

6:07 PM - 7:37 PM
3:56 AM - 5:26 AM

Action Rating: 4 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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