Knappa Tide Chart Calendar for May 2025
Knappa Tide Table (Columbia River) for May 2025
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 | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
5/1 | N/A | H | 9'1" | 4:28AM | 10'1" | L | -0'11" | 12:19PM | 7'9" | H | 6'9" | 6:26PM | 4'0" | - | - | - | - | 06:00-20:23 | 08:41-00:54 |
5/2 | 4'0" | L | 2'9" | 12:04AM | 5'9" | H | 8'6" | 5:18AM | 9'0" | L | -0'5" | 1:15PM | 7'1" | H | 6'7" | 7:27PM | 3'7" | 05:58-20:24 | 09:53-01:49 |
5/3 | 3'7" | L | 2'11" | 1:06AM | 4'10" | H | 7'9" | 6:16AM | 7'9" | L | 0'0" | 2:16PM | 6'6" | H | 6'7" | 8:31PM | 3'6" | 05:57-20:26 | 11:08-02:29 |
5/4 | 3'6" | L | 3'0" | 2:18AM | 4'1" | H | 7'1" | 7:28AM | 6'8" | L | 0'5" | 3:19PM | 6'4" | H | 6'9" | 9:33PM | 3'11" | 05:55-20:27 | 12:23-02:58 |
5/5 | 3'11" | L | 2'10" | 3:37AM | 3'9" | H | 6'8" | 8:50AM | 5'11" | L | 0'8" | 4:21PM | 6'4" | H | 7'1" | 10:28PM | 4'8" | 05:54-20:28 | 13:34-03:20 |
5/6 | 4'8" | L | 2'4" | 4:52AM | 4'1" | H | 6'6" | 10:08AM | 5'6" | L | 0'11" | 5:16PM | 6'7" | H | 7'6" | 11:14PM | 5'8" | 05:52-20:29 | 14:42-03:38 |
5/7 | 5'8" | L | 1'9" | 5:55AM | 4'9" | H | 6'6" | 11:16AM | 5'4" | L | 1'1" | 6:03PM | 6'9" | H | 7'10" | 11:54PM | 6'8" | 05:51-20:31 | 15:48-03:54 |
5/8 | 6'8" | L | 1'1" | 6:48AM | 5'6" | H | 6'7" | 12:14PM | 5'3" | L | 1'4" | 6:45PM | 6'9" | - | - | - | - | 05:50-20:32 | 16:53-04:09 |
5/9 | 6'9" | H | 8'1" | 12:28AM | 7'7" | L | 0'6" | 7:33AM | 6'2" | H | 6'9" | 1:04PM | 5'1" | L | 1'7" | 7:22PM | 6'8" | 05:48-20:33 | 17:58-04:23 |
5/10 | 6'8" | H | 8'3" | 12:59AM | 8'2" | L | 0'1" | 8:14AM | 6'8" | H | 6'10" | 1:51PM | 4'10" | L | 1'11" | 7:58PM | 6'5" | 05:47-20:34 | 19:03-04:39 |
5/11 | 6'5" | H | 8'5" | 1:27AM | 8'7" | L | -0'2" | 8:52AM | 7'1" | H | 6'10" | 2:35PM | 4'7" | L | 2'2" | 8:32PM | 6'2" | 05:46-20:36 | 20:11-04:57 |
5/12 | 6'2" | H | 8'5" | 1:54AM | 8'10" | L | -0'5" | 9:27AM | 7'3" | H | 6'10" | 3:18PM | 4'4" | L | 2'6" | 9:06PM | 5'11" | 05:44-20:37 | 21:19-05:19 |
5/13 | 5'11" | H | 8'5" | 2:21AM | 8'11" | L | -0'6" | 10:02AM | 7'3" | H | 6'9" | 3:59PM | 4'0" | L | 2'9" | 9:40PM | 5'8" | 05:43-20:38 | 22:25-05:46 |
5/14 | 5'8" | H | 8'5" | 2:49AM | 8'11" | L | -0'5" | 10:36AM | 7'2" | H | 6'8" | 4:41PM | 3'9" | L | 2'11" | 10:15PM | 5'5" | 05:42-20:39 | 23:27-06:22 |
5/15 | 5'5" | H | 8'4" | 3:20AM | 8'9" | L | -0'5" | 11:10AM | 6'11" | H | 6'6" | 5:22PM | 3'6" | L | 3'0" | 10:51PM | 5'3" | 05:41-20:41 | 00:00-07:08 |
5/16 | 5'3" | H | 8'3" | 3:56AM | 8'7" | L | -0'3" | 11:46AM | 6'8" | H | 6'5" | 6:06PM | 3'3" | L | 3'1" | 11:32PM | 5 | 05:39-20:42 | 00:20-08:05 |
5/17 | 5 | H | 8'1" | 4:36AM | 8'3" | L | -0'1" | 12:27PM | 6'6" | H | 6'4" | 6:54PM | 3'2" | - | - | - | - | 05:38-20:43 | 01:04-09:12 |
5/18 | 3'2" | L | 3'2" | 12:20AM | 4'7" | H | 7'10" | 5:24AM | 7'9" | L | 0'0" | 1:13PM | 6'4" | H | 6'5" | 7:44PM | 3'3" | 05:37-20:44 | 01:38-10:24 |
5/19 | 3'3" | L | 3'2" | 1:21AM | 4'2" | H | 7'5" | 6:22AM | 7'1" | L | 0'3" | 2:06PM | 6'4" | H | 6'8" | 8:37PM | 3'8" | 05:36-20:45 | 02:06-11:39 |
5/20 | 3'8" | L | 2'11" | 2:33AM | 4 | H | 6'11" | 7:35AM | 6'4" | L | 0'6" | 3:03PM | 6'6" | H | 7'0" | 9:27PM | 4'7" | 05:35-20:46 | 02:28-12:55 |
5/21 | 4'7" | L | 2'5" | 3:49AM | 4'2" | H | 6'7" | 9:00AM | 5'10" | L | 0'9" | 4:02PM | 6'9" | H | 7'7" | 10:14PM | 5'11" | 05:34-20:47 | 02:47-14:12 |
5/22 | 5'11" | L | 1'8" | 5:00AM | 4'10" | H | 6'7" | 10:22AM | 5'6" | L | 1'0" | 4:58PM | 7'1" | H | 8'2" | 10:58PM | 7'5" | 05:33-20:49 | 03:05-15:31 |
5/23 | 7'5" | L | 0'9" | 6:03AM | 5'11" | H | 6'8" | 11:35AM | 5'4" | L | 1'4" | 5:51PM | 7'5" | H | 8'9" | 11:40PM | 8'10" | 05:32-20:50 | 03:24-16:52 |
5/24 | 8'10" | L | -0'1" | 7:00AM | 7'0" | H | 6'10" | 12:40PM | 5'2" | L | 1'8" | 6:42PM | 7'7" | - | - | - | - | 05:31-20:51 | 03:44-18:17 |
5/25 | 7'7" | H | 9'3" | 12:22AM | 10'1" | L | -0'10" | 7:53AM | 7'11" | H | 7'0" | 1:41PM | 5'0" | L | 1'11" | 7:32PM | 7'6" | 05:31-20:52 | 04:09-19:45 |
5/26 | 7'6" | H | 9'6" | 1:05AM | 10'11" | L | -1'4" | 8:44AM | 8'6" | H | 7'1" | 2:39PM | 4'10" | L | 2'2" | 8:23PM | 7'5" | 05:30-20:53 | 04:41-21:12 |
5/27 | 7'5" | H | 9'8" | 1:49AM | 11'3" | L | -1'7" | 9:35AM | 8'9" | H | 7'2" | 3:34PM | 4'8" | L | 2'5" | 9:14PM | 7'1" | 05:29-20:54 | 05:24-22:31 |
5/28 | 7'1" | H | 9'6" | 2:35AM | 11'2" | L | -1'7" | 10:25AM | 8'9" | H | 7'1" | 4:27PM | 4'6" | L | 2'7" | 10:07PM | 6'8" | 05:28-20:55 | 06:21-23:35 |
5/29 | 6'8" | H | 9'3" | 3:22AM | 10'8" | L | -1'4" | 11:15AM | 8'5" | H | 7'1" | 5:20PM | 4'4" | L | 2'8" | 11:01PM | 6'1" | 05:28-20:56 | 07:31-00:00 |
5/30 | 6'1" | H | 8'9" | 4:13AM | 9'10" | L | -1'0" | 12:04PM | 8'0" | H | 7'0" | 6:12PM | 4'3" | L | 2'9" | 11:57PM | 5'5" | 05:27-20:57 | 08:48-00:23 |
5/31 | 5'5" | H | 8'2" | 5:05AM | 8'9" | L | -0'6" | 12:54PM | 7'6" | H | 7'0" | 7:05PM | N/A | - | - | - | - | 05:26-20:57 | 10:06-00:57 |
Textual Tide Details
May 2nd (Fri)
May 3rd (Sat)
May 4th (Sun)
May 5th (Mon)
May 6th (Tue)
May 7th (Wed)
May 8th (Thu)
May 9th (Fri)
May 10th (Sat)
May 11th (Sun)
May 12th (Mon)
May 13th (Tue)
May 14th (Wed)
May 15th (Thu)
May 16th (Fri)
May 17th (Sat)
May 18th (Sun)
May 19th (Mon)
May 20th (Tue)
May 21st (Wed)
May 22nd (Thu)
May 23rd (Fri)
May 24th (Sat)
May 25th (Sun)
May 26th (Mon)
May 27th (Tue)
May 28th (Wed)
May 29th (Thu)
May 30th (Fri)
May 31st (Sat)
NOAA Marine Advisory and Weather for Knappa
Dense Fog Advisory
Dense Fog Advisory issued July 14 at 2:01AM PDT until July 14 at 2:00PM PDT by NWS Portland OR
* WHAT...Dense fog will reduce visibility to 1 NM or less.
* WHERE...In the Main Channel of the Columbia River Bar.
* WHEN...Until 2 PM PDT this afternoon.
* IMPACTS...Low visibility will make navigation difficult.
Effective: July 14, 2025, 9:01 AM
Expires: July 14, 2025, 9:00 PM
Marine Forecast (PZZ210)
PZZ210-142330-
Columbia River Bar-
201 AM PDT Mon Jul 14 2025
...DENSE FOG ADVISORY IN EFFECT UNTIL 2 PM PDT THIS AFTERNOON...
.IN THE MAIN CHANNEL...
.GENERAL SEAS...5 to 7 ft through Tuesday morning.
.FIRST EBB...Strong ebb current of 5.63 kt at 729 AM Monday. Seas
6 ft.
.SECOND EBB...Ebb current of 3.98 kt at 816 PM Monday. Seas 5 to 6
ft.
.THIRD EBB...Ebb current of 5.16 kt at 811 AM Tuesday. Seas 6 ft.
Land Forecast (ORZ101)
TONIGHT: Mostly cloudy this morning, then becoming partly sunny. Highs in the mid 60s. Northwest wind 10 to 15 mph.
TUESDAY: Mostly cloudy. Lows in the lower 50s. Northwest wind 5 to 10 mph.
TUESDAY NIGHT: Mostly sunny. Highs in the lower 80s. North wind 5 to 10 mph.
WEDNESDAY: Mostly clear. Lows in the mid 50s. North wind 5 to 10 mph.
WEDNESDAY NIGHT: Sunny. Highs in the upper 70s. North wind 5 to 10 mph.
THURSDAY: Mostly clear in the evening, then becoming mostly cloudy. Lows in the mid 50s.
THURSDAY NIGHT: Mostly cloudy in the morning, then becoming mostly sunny. Highs in the lower 70s.
FRIDAY: Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 50s.
FRIDAY NIGHT: Mostly cloudy in the morning, then becoming mostly sunny. Highs in the upper 60s.
SATURDAY: Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 50s.
SATURDAY NIGHT: Mostly cloudy in the morning, then becoming partly sunny. Highs in the upper 60s.
SUNDAY: Mostly cloudy. Lows in the mid 50s.
Last updated: July 14, 2025, 12:00 PM