46.1867’ N, 123.5880’ W

Knappa, Knappa Slough, OR

57°
H 68°
L 51°
SSW
3mph
High tide
12:12 pm

Knappa, Knappa Slough, OR Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Mon
Sep 7
AM Clouds/PM Sun
Close Hourly
68º / 51º 12% WSW 8 mph 78%
7am Cloudy 57º 5% SSW 3 mph 91%
8am Cloudy 58º 4% S 3 mph 90%
9am Cloudy 60º 7% SW 2 mph 87%
10am Cloudy 61º 9% WSW 3 mph 83%
11am Mostly Cloudy 62º 6% W 3 mph 82%
12pm Partly Cloudy 64º 5% W 4 mph 77%
1pm Partly Cloudy 65º 6% WNW 5 mph 73%
2pm Partly Cloudy 66º 9% W 6 mph 71%
3pm Partly Cloudy 67º 4% W 7 mph 67%
4pm Partly Cloudy 67º 3% W 8 mph 67%
5pm Partly Cloudy 66º 3% W 8 mph 69%
6pm Partly Cloudy 66º 4% W 7 mph 70%
7pm Mostly Sunny 64º 5% W 6 mph 76%
8pm Clear 61º 7% W 4 mph 84%
9pm Clear 59º 8% W 3 mph 88%
10pm Clear 57º 9% WSW 2 mph 93%
11pm Clear 57º 9% WSW 2 mph 94%
Tue
Sep 8
Partly Cloudy
View Hourly
77º / 52º 20% N 8 mph 70%
12am Partly Cloudy 55º 21% SW 2 mph 97%
1am Partly Cloudy 54º 21% WSW 2 mph 98%
2am Partly Cloudy 54º 21% SW 2 mph 98%
3am Mostly Clear 53º 9% SSW 2 mph 97%
4am Partly Cloudy 53º 16% S 1 mph 98%
5am Partly Cloudy 53º 21% SE 1 mph 96%
6am Partly Cloudy 52º 16% ESE 1 mph 96%
7am Mostly Cloudy 52º 21% E 1 mph 98%
8am Partly Cloudy 54º 21% E 1 mph 97%
9am Partly Cloudy 57º 20% NE 1 mph 91%
10am Sunny 61º 5% NNE 2 mph 82%
11am Sunny 66º 3% NNE 3 mph 70%
12pm Sunny 69º 1% N 4 mph 64%
1pm Sunny 71º 1% N 5 mph 59%
2pm Sunny 74º 1% NNW 6 mph 55%
3pm Sunny 75º 1% NNW 8 mph 51%
4pm Sunny 75º 1% NW 8 mph 52%
5pm Sunny 74º 1% NW 8 mph 55%
6pm Sunny 72º 3% WNW 7 mph 60%
7pm Sunny 69º 5% WNW 6 mph 67%
8pm Clear 65º 7% W 5 mph 76%
9pm Clear 62º 7% WSW 4 mph 81%
10pm Clear 60º 8% SW 3 mph 85%
11pm Clear 59º 8% SW 2 mph 88%
Wed
Sep 9
Mostly Sunny
View Hourly
79º / 57º 7% N 9 mph 65%
12am Clear 57º 8% S 2 mph 90%
1am Clear 55º 8% S 2 mph 92%
2am Clear 54º 8% SE 2 mph 94%
3am Clear 54º 8% ESE 2 mph 94%
4am Clear 53º 8% E 2 mph 94%
5am Clear 53º 8% E 2 mph 94%
6am Clear 53º 7% E 3 mph 93%
Thu
Sep 10
AM Clouds/PM Sun 67º / 54º 24% WNW 11 mph 75%
Fri
Sep 11
Mostly Cloudy 66º / 52º 24% WSW 9 mph 73%
Sat
Sep 12
Showers 66º / 51º 48% SW 8 mph 77%
Sun
Sep 13
Partly Cloudy 69º / 53º 22% SSW 7 mph 72%
Mon
Sep 14
Sunny 74º / 53º 11% SE 8 mph 64%

Weather Radar for Knappa, Knappa Slough, OR See Radar

* 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 4 ft through tuesday morning.

First Ebb
High : 0ºF
Ebb current of 5.19 kt at 151 am monday. Seas 4 ft.

Second Ebb
Low : 0ºF
Ebb current of 2.95 kt at 234 pm monday. Seas 3 to 4 ft.

Third Ebb
High : 0ºF
Ebb current of 5.56 kt at 252 am tuesday. Seas 4 ft.



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

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    Wind Speed Forecast for Knappa, Knappa Slough, OR

    MondayTuesdayWednesday
    Wind Speed (MPH) 337622138622
    2pm6pm10pm2am6am10am2pm6pm10pm2am6am10am
    MPH 337622138622
    DIR SSWWWWWSWSSWENNENNWWNWSWESE

    Current Weather Conditions In Knappa, Knappa Slough, OR

    As Of: 42 minutes ago

    • 57ºF
    • 57ºF
    • 3mph
    • 0º (SSW)
    • 3mph
    • Cloudy
    • 9mi
    • 30.13"
    • 91%
    • 0ºF

    The weather right now in Knappa, Knappa Slough, OR is Cloudy. The current temperature is 57°F, and the expected high and low for today, Monday, September 7, 2026, are 68° high temperature and 51°F low temperature. The wind is currently blowing at 3 miles per hour, and coming from the South Southwest. The wind is gusting to 3 mph. With the wind and the atmosphere the temperature feels like 57° Fahrenheit. Expected precipitation is 5 percent, with current humidity at 91 percent, and air pressure at 30.13 in. Visibility is 9 nautical miles. There are 1 current weather alert(s).

    Weather Alerts
    Small Craft Advisory - 1:48am Mon Sep 7 2026

    ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 2 PM TO 11 PM PDT TUESDAY...

    WHAT: Rough bar conditions expected. Seas 4 to 7 ft at 10
    seconds and north winds 15 to 20 kt with gusts up to 25 kt
    expected.

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

    WHEN: From 2 PM to 11 PM PDT Tuesday.

    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.

    &&