Knapp Landing Tides | Tide Charts & Tables | Columbia River, WA

Knapp Landing Tide Chart for (Mon) June 1, 2026

Knapp Landing tide chart for Monday, June 1, 2026
Knapp Landing tides for Jun 1st, the sunrise is 5:24am-8:53pm and the tide times are L 2:45am 3'4" H 6:20am 8'7" L 3:45pm -0'8" H 8:14pm 6'11" .

Knapp Landing Tide Chart for (Tue) June 2, 2026

Knapp Landing tide chart for Tuesday, June 2, 2026
Knapp Landing tides for Jun 2nd, the sunrise is 5:24am-8:54pm and the tide times are L 3:23am 3'5" H 6:54am 8'6" L 4:20pm -0'6" H 8:54pm 6'10" .

Knapp Landing Tide Chart for (Wed) June 3, 2026

Knapp Landing tide chart for Wednesday, June 3, 2026
Knapp Landing tides for Jun 3rd, the sunrise is 5:23am-8:55pm and the tide times are L 4:02am 3'6" H 7:29am 8'4" L 4:54pm -0'4" H 9:33pm 6'10" .

Knapp Landing Tide Chart for (Thu) June 4, 2026

Knapp Landing tide chart for Thursday, June 4, 2026
Knapp Landing tides for Jun 4th, the sunrise is 5:23am-8:55pm and the tide times are L 4:42am 3'6" H 8:08am 8'2" L 5:28pm -0'2" H 10:12pm 6'9" .

Knapp Landing Tide Chart for (Fri) June 5, 2026

Knapp Landing tide chart for Friday, June 5, 2026
Knapp Landing tides for Jun 5th, the sunrise is 5:22am-8:56pm and the tide times are L 5:24am 3'6" H 8:50am 7'11" L 6:04pm 0'0" H 10:51pm 6'10" .

Knapp Landing Tide Chart for (Sat) June 6, 2026

Knapp Landing tide chart for Saturday, June 6, 2026
Knapp Landing tides for Jun 6th, the sunrise is 5:22am-8:57pm and the tide times are L 6:14am 3'5" H 9:38am 7'6" L 6:42pm 0'4" H 11:33pm 7'0" .

Knapp Landing Tide Chart for (Sun) June 7, 2026

Knapp Landing tide chart for Sunday, June 7, 2026
Knapp Landing tides for Jun 7th, the sunrise is 5:22am-8:58pm and the tide times are L 7:11am 3'2" H 10:37am 7'0" L 7:26pm 0'8" .

Knapp Landing Tide Chart for (Mon) June 8, 2026

Knapp Landing tide chart for Monday, June 8, 2026
Knapp Landing tides for Jun 8th, the sunrise is 5:21am-8:58pm and the tide times are H 12:15am 7'4" L 8:17am 2'10" H 11:48am 6'6" L 8:14pm 1'1" .

Knapp Landing Tide Chart for (Tue) June 9, 2026

Knapp Landing tide chart for Tuesday, June 9, 2026
Knapp Landing tides for Jun 9th, the sunrise is 5:21am-8:59pm and the tide times are H 12:59am 7'8" L 9:26am 2'2" H 1:10pm 6'2" L 9:07pm 1'7" .

Knapp Landing Tide Chart for (Wed) June 10, 2026

Knapp Landing tide chart for Wednesday, June 10, 2026
Knapp Landing tides for Jun 10th, the sunrise is 5:21am-9:00pm and the tide times are H 1:43am 8'2" L 10:32am 1'4" H 2:31pm 6'2" L 10:03pm 2'1" .

Knapp Landing Tide Chart for (Thu) June 11, 2026

Knapp Landing tide chart for Thursday, June 11, 2026
Knapp Landing tides for Jun 11th, the sunrise is 5:21am-9:00pm and the tide times are H 2:28am 8'8" L 11:33am 0'4" H 3:43pm 6'3" L 11:00pm 2'6" .

Knapp Landing Tide Chart for (Fri) June 12, 2026

Knapp Landing tide chart for Friday, June 12, 2026
Knapp Landing tides for Jun 12th, the sunrise is 5:20am-9:01pm and the tide times are H 3:13am 9'1" L 12:30pm -0'5" H 4:48pm 6'6" L 11:57pm 2'9" .

Knapp Landing Tide Chart for (Sat) June 13, 2026

Knapp Landing tide chart for Saturday, June 13, 2026
Knapp Landing tides for Jun 13th, the sunrise is 5:20am-9:01pm and the tide times are H 4:00am 9'6" L 1:24pm -1'2" H 5:49pm 6'10" .

Knapp Landing Tide Chart for (Sun) June 14, 2026

Knapp Landing tide chart for Sunday, June 14, 2026
Knapp Landing tides for Jun 14th, the sunrise is 5:20am-9:02pm and the tide times are L 12:54am 3'0" H 4:49am 9'9" L 2:17pm -1'8" H 6:45pm 7'0" .

Knapp Landing Tide Chart for (Mon) June 15, 2026

Knapp Landing tide chart for Monday, June 15, 2026
Knapp Landing tides for Jun 15th, the sunrise is 5:20am-9:02pm and the tide times are L 1:51am 3'1" H 5:40am 9'10" L 3:09pm -1'11" H 7:39pm 7'3" .

Knapp Landing Tide Chart for (Tue) June 16, 2026

Knapp Landing tide chart for Tuesday, June 16, 2026
Knapp Landing tides for Jun 16th, the sunrise is 5:20am-9:02pm and the tide times are L 2:47am 3'0" H 6:33am 9'9" L 3:59pm -1'11" H 8:30pm 7'5" .

Knapp Landing Tide Chart for (Wed) June 17, 2026

Knapp Landing tide chart for Wednesday, June 17, 2026
Knapp Landing tides for Jun 17th, the sunrise is 5:20am-9:03pm and the tide times are L 3:44am 2'11" H 7:27am 9'6" L 4:48pm -1'9" H 9:19pm 7'6" .

Knapp Landing Tide Chart for (Thu) June 18, 2026

Knapp Landing tide chart for Thursday, June 18, 2026
Knapp Landing tides for Jun 18th, the sunrise is 5:20am-9:03pm and the tide times are L 4:42am 2'9" H 8:22am 9'0" L 5:35pm -1'3" H 10:07pm 7'8" .

Knapp Landing Tide Chart for (Fri) June 19, 2026

Knapp Landing tide chart for Friday, June 19, 2026
Knapp Landing tides for Jun 19th, the sunrise is 5:21am-9:03pm and the tide times are L 5:40am 2'7" H 9:19am 8'5" L 6:22pm -0'9" H 10:55pm 7'10" .

Knapp Landing Tide Chart for (Sat) June 20, 2026

Knapp Landing tide chart for Saturday, June 20, 2026
Knapp Landing tides for Jun 20th, the sunrise is 5:21am-9:04pm and the tide times are L 6:41am 2'4" H 10:19am 7'8" L 7:08pm -0'0" H 11:42pm 8'0" .

Knapp Landing Tide Chart for (Sun) June 21, 2026

Knapp Landing tide chart for Sunday, June 21, 2026
Knapp Landing tides for Jun 21st, the sunrise is 5:21am-9:04pm and the tide times are L 7:46am 2'1" H 11:25am 6'11" L 7:55pm 0'8" .

Knapp Landing Tide Chart for (Mon) June 22, 2026

Knapp Landing tide chart for Monday, June 22, 2026
Knapp Landing tides for Jun 22nd, the sunrise is 5:21am-9:04pm and the tide times are H 12:28am 8'1" L 8:53am 1'9" H 12:38pm 6'4" L 8:43pm 1'4" .

Knapp Landing Tide Chart for (Tue) June 23, 2026

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Knapp Landing Tide Chart for (Wed) June 24, 2026

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Knapp Landing Tide Chart for (Thu) June 25, 2026

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Knapp Landing Tide Chart for (Fri) June 26, 2026

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Knapp Landing Tide Chart for (Sat) June 27, 2026

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Knapp Landing Tide Chart for (Sun) June 28, 2026

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Knapp Landing Tide Chart for (Mon) June 29, 2026

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Knapp Landing Tide Chart for (Tue) June 30, 2026

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Knapp Landing Tide Calendar | June 2026

Sun Mon Tue Wed Thu Fri Sat
 
Knapp Landing tide chart for Monday, June 1, 2026
Knapp Landing tide chart for Tuesday, June 2, 2026
Knapp Landing tide chart for Wednesday, June 3, 2026
Knapp Landing tide chart for Thursday, June 4, 2026
Knapp Landing tide chart for Friday, June 5, 2026
Knapp Landing tide chart for Saturday, June 6, 2026
Knapp Landing tide chart for Sunday, June 7, 2026
Knapp Landing tide chart for Monday, June 8, 2026
Knapp Landing tide chart for Tuesday, June 9, 2026
Knapp Landing tide chart for Wednesday, June 10, 2026
Knapp Landing tide chart for Thursday, June 11, 2026
Knapp Landing tide chart for Friday, June 12, 2026
Knapp Landing tide chart for Saturday, June 13, 2026
Knapp Landing tide chart for Sunday, June 14, 2026
Knapp Landing tide chart for Monday, June 15, 2026
Knapp Landing tide chart for Tuesday, June 16, 2026
Knapp Landing tide chart for Wednesday, June 17, 2026
Knapp Landing tide chart for Thursday, June 18, 2026
Knapp Landing tide chart for Friday, June 19, 2026
Knapp Landing tide chart for Saturday, June 20, 2026
Knapp Landing tide chart for Sunday, June 21, 2026
Knapp Landing tide chart for Monday, June 22, 2026
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Knapp Landing Tide Table for June 2026

View tide tables in a column-row format below, with a "diff" column to spot large tide height swings—great for anglers. Scroll down for a textual format, ideal for reading or sharing.

- diff Tides diff Tides diff Tides diff Tides diff Sun Moon
6/1 N/A L 3'4" 2:45AM 5'3" H 8'7" 6:20AM 9'3" L -0'8" 3:45PM 7'7" H 6'11" 8:14PM 3'5" 05:24-20:53 22:49-05:50
6/2 3'5" L 3'5" 3:23AM 5'0" H 8'6" 6:54AM 9'1" L -0'6" 4:20PM 7'5" H 6'10" 8:54PM 3'4" 05:24-20:54 23:31-06:44
6/3 3'4" L 3'6" 4:02AM 4'10" H 8'4" 7:29AM 8'9" L -0'4" 4:54PM 7'2" H 6'10" 9:33PM 3'3" 05:23-20:55 00:00-07:46
6/4 3'3" L 3'6" 4:42AM 4'8" H 8'2" 8:08AM 8'5" L -0'2" 5:28PM 7'0" H 6'9" 10:12PM 3'3" 05:23-20:55 00:05-08:52
6/5 3'3" L 3'6" 5:24AM 4'5" H 7'11" 8:50AM 7'11" L 0'0" 6:04PM 6'10" H 6'10" 10:51PM 3'5" 05:22-20:56 00:32-10:01
6/6 3'5" L 3'5" 6:14AM 4'1" H 7'6" 9:38AM 7'2" L 0'4" 6:42PM 6'8" H 7'0" 11:33PM 3'10" 05:22-20:57 00:54-11:10
6/7 3'10" L 3'2" 7:11AM 3'9" H 7'0" 10:37AM 6'4" L 0'8" 7:26PM 6'7" - - - - 05:22-20:58 01:13-12:19
6/8 6'7" H 7'4" 12:15AM 4'6" L 2'10" 8:17AM 3'8" H 6'6" 11:48AM 5'4" L 1'1" 8:14PM 6'6" 05:21-20:58 01:31-13:30
6/9 6'6" H 7'8" 12:59AM 5'6" L 2'2" 9:26AM 4'0" H 6'2" 1:10PM 4'6" L 1'7" 9:07PM 6'6" 05:21-20:59 01:48-14:42
6/10 6'6" H 8'2" 1:43AM 6'10" L 1'4" 10:32AM 4'9" H 6'2" 2:31PM 4'0" L 2'1" 10:03PM 6'6" 05:21-21:00 02:07-15:59
6/11 6'6" H 8'8" 2:28AM 8'3" L 0'4" 11:33AM 5'11" H 6'3" 3:43PM 3'9" L 2'6" 11:00PM 6'7" 05:21-21:00 02:29-17:20
6/12 6'7" H 9'1" 3:13AM 9'7" L -0'5" 12:30PM 7'0" H 6'6" 4:48PM 3'9" L 2'9" 11:57PM 6'8" 05:20-21:01 02:56-18:45
6/13 6'8" H 9'6" 4:00AM 10'8" L -1'2" 1:24PM 8'0" H 6'10" 5:49PM 3'9" - - - - 05:20-21:01 03:32-20:09
6/14 3'9" L 3'0" 12:54AM 6'8" H 9'9" 4:49AM 11'5" L -1'8" 2:17PM 8'9" H 7'0" 6:45PM 3'11" 05:20-21:02 04:21-21:25
6/15 3'11" L 3'1" 1:51AM 6'9" H 9'10" 5:40AM 11'9" L -1'11" 3:09PM 9'2" H 7'3" 7:39PM 4'2" 05:20-21:02 05:26-22:25
6/16 4'2" L 3'0" 2:47AM 6'8" H 9'9" 6:33AM 11'9" L -1'11" 3:59PM 9'4" H 7'5" 8:30PM 4'5" 05:20-21:02 06:44-23:11
6/17 4'5" L 2'11" 3:44AM 6'7" H 9'6" 7:27AM 11'3" L -1'9" 4:48PM 9'3" H 7'6" 9:19PM 4'9" 05:20-21:03 08:08-23:44
6/18 4'9" L 2'9" 4:42AM 6'3" H 9'0" 8:22AM 10'4" L -1'3" 5:35PM 9'0" H 7'8" 10:07PM 5'1" 05:20-21:03 09:31-00:00
6/19 5'1" L 2'7" 5:40AM 5'10" H 8'5" 9:19AM 9'2" L -0'9" 6:22PM 8'7" H 7'10" 10:55PM 5'5" 05:21-21:03 10:50-00:09
6/20 5'5" L 2'4" 6:41AM 5'3" H 7'8" 10:19AM 7'9" L -0'0" 7:08PM 8'0" H 8'0" 11:42PM 5'10" 05:21-21:04 12:04-00:30
6/21 5'10" L 2'1" 7:46AM 4'9" H 6'11" 11:25AM 6'3" L 0'8" 7:55PM 7'5" - - - - 05:21-21:04 13:14-00:48
6/22 7'5" H 8'1" 12:28AM 6'4" L 1'9" 8:53AM 4'6" H 6'4" 12:38PM 4'11" L 1'4" 8:43PM 3'1" 05:21-21:04 14:23-01:05
6/23 0'0" L 4'6" 1:23AM 0'0" H 5'7" 2:34AM 0'0" L 6'8" 3:45PM 0'0" H 7'9" 4:56PM 3'3" 00:00-13:11 00:00-13:11
6/24 0'0" L 4'6" 1:23AM 0'0" H 5'7" 2:34AM 0'0" L 6'8" 3:45PM 0'0" H 7'9" 4:56PM 3'3" 00:00-13:11 00:00-13:11
6/25 0'0" L 4'6" 1:23AM 0'0" H 5'7" 2:34AM 0'0" L 6'8" 3:45PM 0'0" H 7'9" 4:56PM 3'3" 00:00-13:11 00:00-13:11
6/26 0'0" L 4'6" 1:23AM 0'0" H 5'7" 2:34AM 0'0" L 6'8" 3:45PM 0'0" H 7'9" 4:56PM 3'3" 00:00-13:11 00:00-13:11
6/27 0'0" L 4'6" 1:23AM 0'0" H 5'7" 2:34AM 0'0" L 6'8" 3:45PM 0'0" H 7'9" 4:56PM 3'3" 00:00-13:11 00:00-13:11
6/28 0'0" L 4'6" 1:23AM 0'0" H 5'7" 2:34AM 0'0" L 6'8" 3:45PM 0'0" H 7'9" 4:56PM 3'3" 00:00-13:11 00:00-13:11
6/29 0'0" L 4'6" 1:23AM 0'0" H 5'7" 2:34AM 0'0" L 6'8" 3:45PM 0'0" H 7'9" 4:56PM 3'3" 00:00-13:11 00:00-13:11
6/30 0'0" L 4'6" 1:23AM 0'0" H 5'7" 2:34AM 0'0" L 6'8" 3:45PM 0'0" H 7'9" 4:56PM N/A 00:00-13:11 00:00-13:11

Knapp Landing Textual Tide Table for June 2026


Jun 1st (Mon)
the sunrise is 5:24am-8:53pm and the tide times are L 2:45am 3'4" H 6:20am 8'7" L 3:45pm -0'8" H 8:14pm 6'11" .
Jun 2nd (Tue)
the sunrise is 5:24am-8:54pm and the tide times are L 3:23am 3'5" H 6:54am 8'6" L 4:20pm -0'6" H 8:54pm 6'10" .
Jun 3rd (Wed)
the sunrise is 5:23am-8:55pm and the tide times are L 4:02am 3'6" H 7:29am 8'4" L 4:54pm -0'4" H 9:33pm 6'10" .
Jun 4th (Thu)
the sunrise is 5:23am-8:55pm and the tide times are L 4:42am 3'6" H 8:08am 8'2" L 5:28pm -0'2" H 10:12pm 6'9" .
Jun 5th (Fri)
the sunrise is 5:22am-8:56pm and the tide times are L 5:24am 3'6" H 8:50am 7'11" L 6:04pm 0'0" H 10:51pm 6'10" .
Jun 6th (Sat)
the sunrise is 5:22am-8:57pm and the tide times are L 6:14am 3'5" H 9:38am 7'6" L 6:42pm 0'4" H 11:33pm 7'0" .
Jun 7th (Sun)
the sunrise is 5:22am-8:58pm and the tide times are L 7:11am 3'2" H 10:37am 7'0" L 7:26pm 0'8" .
Jun 8th (Mon)
the sunrise is 5:21am-8:58pm and the tide times are H 12:15am 7'4" L 8:17am 2'10" H 11:48am 6'6" L 8:14pm 1'1" .
Jun 9th (Tue)
the sunrise is 5:21am-8:59pm and the tide times are H 12:59am 7'8" L 9:26am 2'2" H 1:10pm 6'2" L 9:07pm 1'7" .
Jun 10th (Wed)
the sunrise is 5:21am-9:00pm and the tide times are H 1:43am 8'2" L 10:32am 1'4" H 2:31pm 6'2" L 10:03pm 2'1" .
Jun 11th (Thu)
the sunrise is 5:21am-9:00pm and the tide times are H 2:28am 8'8" L 11:33am 0'4" H 3:43pm 6'3" L 11:00pm 2'6" .
Jun 12th (Fri)
the sunrise is 5:20am-9:01pm and the tide times are H 3:13am 9'1" L 12:30pm -0'5" H 4:48pm 6'6" L 11:57pm 2'9" .
Jun 13th (Sat)
the sunrise is 5:20am-9:01pm and the tide times are H 4:00am 9'6" L 1:24pm -1'2" H 5:49pm 6'10" .
Jun 14th (Sun)
the sunrise is 5:20am-9:02pm and the tide times are L 12:54am 3'0" H 4:49am 9'9" L 2:17pm -1'8" H 6:45pm 7'0" .
Jun 15th (Mon)
the sunrise is 5:20am-9:02pm and the tide times are L 1:51am 3'1" H 5:40am 9'10" L 3:09pm -1'11" H 7:39pm 7'3" .
Jun 16th (Tue)
the sunrise is 5:20am-9:02pm and the tide times are L 2:47am 3'0" H 6:33am 9'9" L 3:59pm -1'11" H 8:30pm 7'5" .
Jun 17th (Wed)
the sunrise is 5:20am-9:03pm and the tide times are L 3:44am 2'11" H 7:27am 9'6" L 4:48pm -1'9" H 9:19pm 7'6" .
Jun 18th (Thu)
the sunrise is 5:20am-9:03pm and the tide times are L 4:42am 2'9" H 8:22am 9'0" L 5:35pm -1'3" H 10:07pm 7'8" .
Jun 19th (Fri)
the sunrise is 5:21am-9:03pm and the tide times are L 5:40am 2'7" H 9:19am 8'5" L 6:22pm -0'9" H 10:55pm 7'10" .
Jun 20th (Sat)
the sunrise is 5:21am-9:04pm and the tide times are L 6:41am 2'4" H 10:19am 7'8" L 7:08pm -0'0" H 11:42pm 8'0" .
Jun 21st (Sun)
the sunrise is 5:21am-9:04pm and the tide times are L 7:46am 2'1" H 11:25am 6'11" L 7:55pm 0'8" .
Jun 22nd (Mon)
the sunrise is 5:21am-9:04pm and the tide times are H 12:28am 8'1" L 8:53am 1'9" H 12:38pm 6'4" L 8:43pm 1'4" .
Jun 23rd (Tue)
Sun 0:00am-1:11pm L 1:23am 4'5" H 2:34am 5'6" L 3:45pm 6'7" H 4:56pm 7'8"
Jun 24th (Wed)
Sun 0:00am-1:11pm L 1:23am 4'5" H 2:34am 5'6" L 3:45pm 6'7" H 4:56pm 7'8"
Jun 25th (Thu)
Sun 0:00am-1:11pm L 1:23am 4'5" H 2:34am 5'6" L 3:45pm 6'7" H 4:56pm 7'8"
Jun 26th (Fri)
Sun 0:00am-1:11pm L 1:23am 4'5" H 2:34am 5'6" L 3:45pm 6'7" H 4:56pm 7'8"
Jun 27th (Sat)
Sun 0:00am-1:11pm L 1:23am 4'5" H 2:34am 5'6" L 3:45pm 6'7" H 4:56pm 7'8"
Jun 28th (Sun)
Sun 0:00am-1:11pm L 1:23am 4'5" H 2:34am 5'6" L 3:45pm 6'7" H 4:56pm 7'8"
Jun 29th (Mon)
Sun 0:00am-1:11pm L 1:23am 4'5" H 2:34am 5'6" L 3:45pm 6'7" H 4:56pm 7'8"
Jun 30th (Tue)
Sun 0:00am-1:11pm L 1:23am 4'5" H 2:34am 5'6" L 3:45pm 6'7" H 4:56pm 7'8"

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Washington Tides Map

Tides map. Large blue pin with white center = this station. Small blue pin = other tide stations. Red pins = tidepools covered by this tide station.

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NOAA/NWS Forecast for Knapp Landing | Extreme Heat Watch

Last updated: June 19, 2026, 12:16 PM

Extreme Heat Watch

Extreme Heat Watch issued June 19 at 10:53AM PDT until June 23 at 11:00PM PDT by NWS Portland OR

* WHAT...Dangerously hot conditions with temperatures up to 95 to
100 possible.

* WHERE...Western and Central Columbia River Gorge, Portland Metro
Lowlands, Inner Vancouver Metro, and East Clark County Lowlands.

* WHEN...From Monday morning through Tuesday evening.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.

Effective: June 19, 2026, 5:53 PM

Expires: June 20, 2026, 6:00 AM

Land Forecast (WAZ206)

THIS AFTERNOON: Sunny. Highs around 90. West wind 5 to 10 mph.

TONIGHT: Partly cloudy. Lows in the mid 50s. Northwest wind 5 to 10 mph, becoming light after midnight.

SATURDAY: Partly sunny in the morning, then clearing. Highs in the upper 70s. Winds light.

SATURDAY NIGHT: Mostly clear. Lows in the lower 50s. Northwest wind 10 mph, easing to light after midnight.

SUNDAY: Sunny. Highs in the mid 80s. Light and variable winds, becoming light in the afternoon.

SUNDAY NIGHT: Clear. Lows in the upper 50s.

MONDAY: Sunny. Highs in the upper 90s.

MONDAY NIGHT: Clear. Lows in the mid 60s.

TUESDAY: Sunny. Highs around 100.

TUESDAY NIGHT: Mostly clear. Lows in the lower 60s.

WEDNESDAY: Sunny. Highs in the lower 90s.

WEDNESDAY NIGHT: Mostly clear. Lows in the mid 50s.

THURSDAY: Mostly sunny. Highs in the mid 80s.

Last updated: June 19, 2026, 12:16 PM

Washington State Parks

Washington State Parks and beaches with coastal camping, reservations, day use fees, and tidepool access information

WDFW

Washington Department of Fish and Wildlife with current fishing regulations seasons bag size limits and area specific rules

Columbia River Lower Section Boating Overview (Other)

Overview of lower Columbia River boating near Knapp Landing including nearby access points, sloughs, and channels for fishing, small boat launches, and river exploration. Tidal influences and river flows are key for safe navigation and launches; good for planning trips with tide charts and awareness of currents in the Astoria/Knappa region. Check Oregon State Marine Board for updates on facilities and regulations.

Knappa Slough Columbia River Access (Other)

Informal boating access via Knappa Slough near Knapp Landing on the lower Columbia River, referenced in regional guides for small boat, fishing, and exploration use. Connects to main Columbia channels with opportunities for salmon fishing, crabbing, and tidal river travel. Strong tides and currents require caution for launches, navigation, and avoiding shallows; check Marine Board or local conditions for safe use in the area.

Lower Columbia River Boating Guide Oregon Marine Board (Other)

Oregon State Marine Board guide to the lower Columbia and Willamette Rivers including areas near Knapp Landing and Knappa Slough on the Columbia River. Details public ramps, moorages, navigation hazards, channels, and facilities for recreational boating in the tidal lower river section. Useful for planning launches and tide-aware travel with notes on currents, shoals, and safe navigation in the Astoria vicinity.