Knappa, Knappa Slough, OR Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Tue
Jun 16 		Cloudy -º / 54º 6% W 7 mph 85%
Wed
Jun 17 		AM Clouds/PM Sun
View Hourly 		67º / 50º 5% WNW 12 mph 67%
2am Cloudy 56º 5% W 7 mph 83%
3am Cloudy 56º 4% W 6 mph 84%
4am Cloudy 55º 5% W 5 mph 86%
5am Cloudy 55º 6% W 4 mph 88%
6am Cloudy 55º 6% W 5 mph 87%
7am Cloudy 56º 5% WNW 6 mph 85%
8am Cloudy 57º 3% WNW 6 mph 82%
9am Mostly Cloudy 59º 5% WNW 6 mph 76%
10am Mostly Cloudy 61º 4% WNW 7 mph 70%
11am Partly Cloudy 62º 3% WNW 8 mph 67%
12pm Partly Cloudy 64º 3% WNW 10 mph 63%
1pm Partly Cloudy 65º 2% WNW 11 mph 62%
2pm Mostly Sunny 66º 2% WNW 12 mph 59%
3pm Sunny 66º 2% WNW 12 mph 59%
4pm Sunny 66º 2% WNW 12 mph 58%
5pm Sunny 66º 2% WNW 12 mph 58%
6pm Sunny 64º 2% WNW 12 mph 61%
7pm Sunny 62º 3% WNW 11 mph 65%
8pm Sunny 60º 5% WNW 10 mph 70%
9pm Mostly Sunny 58º 7% W 8 mph 78%
10pm Partly Cloudy 57º 8% W 6 mph 82%
11pm Partly Cloudy 55º 8% W 5 mph 87%
Thu
Jun 18 		Mostly Cloudy
View Hourly 		78º / 53º 20% WNW 10 mph 61%
12am Partly Cloudy 54º 9% W 4 mph 92%
1am Partly Cloudy 53º 9% W 4 mph 96%
2am Partly Cloudy 52º 9% WSW 3 mph 95%
3am Mostly Cloudy 52º 21% WSW 2 mph 97%
4am Mostly Cloudy 51º 21% SW 2 mph 99%
5am Mostly Cloudy 51º 9% SSW 1 mph 98%
6am Mostly Cloudy 51º 9% SW 2 mph 98%
7am Mostly Cloudy 53º 20% SSW 1 mph 95%
8am Partly Cloudy 56º 6% WSW 1 mph 87%
9am Partly Cloudy 61º 4% NNW 2 mph 75%
10am Partly Cloudy 65º 2% NW 3 mph 64%
11am Partly Cloudy 69º 1% NW 4 mph 57%
12pm Mostly Cloudy 72º 1% NW 6 mph 52%
1pm Mostly Cloudy 74º 1% NNW 7 mph 48%
2pm Cloudy 76º 0% NW 8 mph 44%
3pm Mostly Cloudy 76º 1% NW 8 mph 47%
4pm Cloudy 74º 1% WNW 10 mph 52%
5pm Cloudy 73º 1% WNW 10 mph 53%
6pm Cloudy 71º 1% WNW 10 mph 56%
7pm Cloudy 69º 2% WNW 9 mph 59%
8pm Cloudy 67º 3% W 8 mph 63%
9pm Cloudy 64º 4% W 6 mph 70%
10pm Cloudy 62º 5% WSW 5 mph 74%
11pm Mostly Cloudy 60º 5% WSW 4 mph 77%
Fri
Jun 19 		Mostly Sunny
View Hourly 		72º / 52º 6% W 12 mph 66%
12am Mostly Cloudy 59º 5% SW 4 mph 79%
1am Partly Cloudy 58º 6% SW 4 mph 84%
Sat
Jun 20 		Partly Cloudy 65º / 51º 6% WSW 11 mph 70%
Sun
Jun 21 		Partly Cloudy 74º / 52º 7% W 10 mph 64%
Mon
Jun 22 		Mostly Sunny 84º / 56º 6% WNW 10 mph 54%
Tue
Jun 23 		Partly Cloudy 80º / 54º 4% W 11 mph 55%

Weather Radar for Knappa, Knappa Slough, OR See Radar

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* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for Knappa, Knappa Slough, OR

In The Main Channel
High : 0ºF


General Seas
Low : 0ºF
3 to 5 ft building to 5 to 7 ft wednesday evening.

First Ebb
High : 0ºF
Ebb current of 3.63 kt at 644 pm tuesday. Seas 5 to 6 ft.

Second Ebb
Low : 0ºF
Very strong ebb current of 7.03 kt at 653 am wednesday. Seas 9 to 10 ft.

Third Ebb
High : 0ºF
Ebb current of 3.71 kt at 737 pm wednesday. Seas 6 to 7 ft.



NOAA Buoy Data Near Knappa, Knappa Slough, OR See Map

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    Wind Speed Forecast for Knappa, Knappa Slough, OR

    WednesdayThursdayFriday
    Wind Speed (MPH) 757121263238105
    9am1pm5pm9pm1am5am9am1pm5pm9pm1am5am
    MPH 757121263238105
    DIR WWWNWWNWWNWWWSWSWNWNWWNWWSW

    Current Weather Conditions In Knappa, Knappa Slough, OR

    As Of: 40 minutes ago

    • 56ºF
    • 54ºF
    • 7mph
    • 0º (W)
    • 7mph
    • Cloudy
    • 10mi
    • 30.12"
    • 83%
    • 0ºF

    The weather right now in Knappa, Knappa Slough, OR is Cloudy. The current temperature is 56°F, and the expected high and low for today, Wednesday, June 17, 2026, are -° high temperature and 54°F low temperature. The wind is currently blowing at 7 miles per hour, and coming from the West. The wind is gusting to 7 mph. With the wind and the atmosphere the temperature feels like 54° Fahrenheit. Expected precipitation is 5 percent, with current humidity at 83 percent, and air pressure at 30.12 in. Visibility is 10 nautical miles. There are 1 current weather alert(s).

    Weather Alerts
    Small Craft Advisory - 1:01pm Tue Jun 16 2026

    ...SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM TO 9 AM PDT WEDNESDAY...

    WHAT: Rough bar conditions expected during a very strong ebb
    currents of 7.03 kt. Seas 9 to 10 ft.

    WHERE: In the Main Channel of the Columbia River Bar.

    WHEN: From 5 AM to 9 AM PDT Wednesday.

    IMPACTS: Conditions will be hazardous to small craft,
    especially when operating near to, or attempting to cross, the
    Columbia River Bar.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    A Small Craft Advisory means that wave conditions are expected to
    be hazardous to small craft in the vicinity of the Columbia River
    Bar. Mariners are advised to obtain the latest bar conditions
    from the United States Coast Guard before attempting to cross the
    bar.

    &&