Kanaka Bay, San Juan Island, WA Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Tue
Jun 23 		Mostly Sunny
Close Hourly 		83º / 54º 1% NNE 7 mph 36%
2pm Sunny 80º 1% NNE 7 mph 35%
3pm Sunny 81º 1% NNE 6 mph 34%
4pm Mostly Sunny 81º 1% NNE 5 mph 34%
5pm Mostly Sunny 79º 1% N 3 mph 38%
6pm Mostly Sunny 78º 1% NNW 2 mph 39%
7pm Sunny 75º 1% W 2 mph 45%
8pm Sunny 72º 1% SW 2 mph 49%
9pm Sunny 67º 1% SE 1 mph 57%
10pm Clear 63º 2% ESE 0 mph 63%
11pm Clear 61º 2% ENE 0 mph 66%
Wed
Jun 24 		Partly Cloudy
View Hourly 		76º / 51º 3% SSE 11 mph 55%
12am Clear 59º 2% ENE 0 mph 69%
1am Clear 59º 2% NNE 1 mph 69%
2am Clear 58º 2% NE 1 mph 71%
3am Partly Cloudy 57º 2% NNE 1 mph 74%
4am Mostly Cloudy 56º 3% NE 0 mph 79%
5am Mostly Cloudy 55º 4% ENE 0 mph 82%
6am Mostly Cloudy 56º 4% E 0 mph 82%
7am Partly Cloudy 60º 3% ESE 0 mph 77%
8am Partly Cloudy 63º 2% SE 1 mph 69%
9am Partly Cloudy 65º 1% ESE 1 mph 63%
10am Partly Cloudy 68º 1% SE 3 mph 60%
11am Partly Cloudy 68º 1% SE 4 mph 59%
12pm Partly Cloudy 69º 1% SSE 5 mph 57%
1pm Mostly Sunny 71º 1% SSE 6 mph 54%
2pm Partly Cloudy 70º 1% S 7 mph 54%
3pm Partly Cloudy 72º 0% S 9 mph 48%
4pm Partly Cloudy 74º 0% SSW 9 mph 41%
5pm Mostly Sunny 75º 0% SSW 10 mph 37%
6pm Sunny 73º 0% SW 10 mph 38%
7pm Sunny 71º 0% SW 10 mph 42%
8pm Mostly Sunny 68º 0% SW 10 mph 48%
9pm Mostly Sunny 64º 1% SW 10 mph 53%
10pm Clear 60º 1% SW 10 mph 59%
11pm Clear 58º 2% SW 9 mph 65%
Thu
Jun 25 		Cloudy
View Hourly 		62º / 52º 23% SSW 13 mph 72%
12am Clear 56º 3% SW 9 mph 72%
1am Partly Cloudy 55º 5% SW 10 mph 77%
2am Partly Cloudy 53º 6% SW 8 mph 84%
3am Partly Cloudy 53º 7% SW 8 mph 88%
4am Mostly Cloudy 53º 7% SW 8 mph 88%
5am Mostly Cloudy 52º 8% SW 8 mph 90%
6am Cloudy 52º 7% SSW 8 mph 89%
7am Cloudy 55º 7% SSW 9 mph 86%
8am Cloudy 57º 6% SSW 11 mph 81%
9am Cloudy 58º 6% SSW 12 mph 77%
10am Cloudy 59º 5% SSW 12 mph 75%
11am Cloudy 60º 6% S 12 mph 72%
12pm Cloudy 61º 5% S 12 mph 69%
1pm Cloudy 62º 5% S 12 mph 68%
Fri
Jun 26 		Rain 64º / 49º 70% S 12 mph 76%
Sat
Jun 27 		Partly Cloudy 64º / 51º 18% SSW 7 mph 65%
Sun
Jun 28 		AM Clouds/PM Sun 65º / 52º 18% SSW 9 mph 69%
Mon
Jun 29 		Partly Cloudy 65º / 51º 17% S 7 mph 71%
Tue
Jun 30 		AM Clouds/PM Sun 65º / 50º 23% S 8 mph 66%

Weather Radar for Kanaka Bay, San Juan Island, WA See Radar

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* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for Kanaka Bay, San Juan Island, WA

This Afternoon
High : 78ºF
Variable winds 5 kt or less. Mostly sunny. Waves around 1 ft.
Tonight
Low : 56ºF
Variable winds 5 kt or less. Mostly clear. Waves 1 ft or less.
Wednesday
High : 78ºF
Variable winds less than 5 kt becoming SSW 6 to 11 kt in the afternoon. Mostly cloudy, then gradually becoming sunny. Waves around 1 ft.
Wednesday Night
Low : 52ºF
SW wind 11 to 14 kt. Partly cloudy. Waves 2 to 3 ft.
Thursday
High : 65ºF
SSW wind around 11 kt. Mostly cloudy. Waves 2 to 3 ft.
Thursday Night
Low : 51ºF
SW wind 5 to 9 kt becoming variable and less than 5 kt in the evening. Rain. Waves 1 ft or less.
Friday
High : 64ºF
Variable winds less than 5 kt becoming SW 5 to 9 kt in the morning. Rain. Waves 1 ft or less.
Friday Night
Low : 48ºF
WSW wind 10 to 12 kt. A chance of rain. Waves 1 to 2 ft.
Saturday
High : 61ºF
SW wind 7 to 9 kt. A slight chance of rain. Waves 1 to 2 ft.

NOAA Buoy Data Near Kanaka Bay, San Juan Island, WA See Map

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    Featured Local Businesses

    Roche Harbor Marina

    Roche Harbor Resort and Marina

    Wind Speed Forecast for Kanaka Bay, San Juan Island, WA

    TuesdayWednesdayThursday
    Wind Speed (MPH) 720103710108812
    9pm1am5am9am1pm5pm9pm1am5am9am1pm5pm
    MPH 720103710108812
    DIR NNENNWESENEESESSWSWSWSSWSSW

    Current Weather Conditions In Kanaka Bay, San Juan Island, WA

    As Of: 34 minutes ago

    • 80ºF
    • 80ºF
    • 7mph
    • 0º (NNE)
    • 7mph
    • Sunny
    • 10mi
    • 30.03"
    • 35%
    • 0ºF

    The weather right now in Kanaka Bay, San Juan Island, WA is Sunny. The current temperature is 80°F, and the expected high and low for today, Tuesday, June 23, 2026, are 83° high temperature and 54°F low temperature. The wind is currently blowing at 7 miles per hour, and coming from the North Northeast. The wind is gusting to 7 mph. With the wind and the atmosphere the temperature feels like 80° Fahrenheit. Expected precipitation is 1 percent, with current humidity at 35 percent, and air pressure at 30.03 in. Visibility is 10 nautical miles. There are 1 current weather alert(s).

    Weather Alerts
    Heat Advisory - 6:03am Tue Jun 23 2026

    ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING...

    WHAT: Hot conditions with high temperatures in the lower 80s to
    lower 90s.
    This will pose a moderate risk of heat-related illness.

    WHERE: Portions of northwest and west central Washington.

    WHEN: Until 11 PM PDT this evening.

    IMPACTS: Heat will significantly increase the risk of
    heat-related illnesses for those who are sensitive to heat,
    especially those without effective cooling or adequate hydration.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    Drink plenty of fluids, stay in an air-conditioned room, stay out of
    the sun, and check up on relatives and neighbors. Young children and
    pets should never be left unattended in vehicles under any
    circumstances.

    Take extra precautions if you work or spend time outside. When
    possible reschedule strenuous activities to early morning or
    evening. Know the signs and symptoms of heat exhaustion and heat
    stroke. Wear lightweight and loose fitting clothing when possible.
    To reduce risk during outdoor work, the Occupational Safety and
    Health Administration recommends scheduling frequent rest breaks in
    shaded or air conditioned environments. Anyone overcome by heat
    should be moved to a cool and shaded location. Heat stroke is an
    emergency! Call 9 1 1.

    For sheltering information and other human services in your area,
    dial 2 1 1 during business hours or visit wa211.org anytime.

    &&