David Flater (who is author of xtide, the program I use to produce this data) provides the following disclaimer, behind which I firmly stand:

Do not rely on the output of this program for decisions that can result in harm to anyone or anything. Really. I mean it.

Agencies like NOAA exist because there is a need for certifiably correct tide predictions. Please do not rely on XTide if you need guaranteed results. There is no way I can get certified data on a zero budget. I rely on users like you to tell me when something is wrong. Please continue to do so.

Click this button to hide this disclaimer. (Requires JavaScript and cookie support in your browser.)

Tidal Heights at Seattle, Puget Sound, Washington

Time Zone is PDTUnits are feet
Sun 01 May01:0310.9H07:325.1L12:388.1H18:561.6L
Mon 02 May01:5111.1H08:243.9L13:568.6H19:592.0L
Tue 03 May02:3411.4H09:082.4L15:059.3H20:582.5L
Wed 04 May03:1411.7H09:510.9L16:0810.1H21:543.0L
Thu 05 May03:5311.9H10:33-0.5L17:0510.9H22:463.6L
Fri 06 May004:3212.1H11:15-1.7L18:0111.5H23:384.3L
Sat 07 May05:1212.0H11:59-2.5L18:5511.9H
Sun 08 May00:324.9L05:5511.7H12:45-2.8L19:5012.1H
Mon 09 May01:265.4L06:4111.2H13:31-2.6L20:4512.1H
Tue 10 May02:255.8L07:3010.5H14:19-2.0L21:4111.9H
Wed 11 May03:306.0L08:259.6H15:10-1.1L22:3811.7H
Thu 12 May04:455.8L09:298.7H16:04-0.0L23:3711.4H
Fri 13 MayG06:065.4L10:438.0H17:031.2L
Sat 14 May00:3411.2H07:204.6L12:097.6H18:072.3L
Sun 15 May01:2511.0H08:173.6L13:387.7H19:153.2L
Mon 16 May02:0810.9H09:022.7L14:578.1H20:194.0L
Tue 17 May02:4410.8H09:381.8L16:008.8H21:154.5L
Wed 18 May03:1510.7H10:081.0L16:519.4H22:045.1L
Thu 19 May03:4310.6H10:360.3L17:339.9H22:475.5L
Fri 20 May04:1110.5H11:03-0.3L18:0910.4H23:275.9L
Sat 21 May@04:4010.3H11:31-0.8L18:4310.8H
Sun 22 May00:066.3L05:1110.2H12:03-1.2L19:1711.1H
Mon 23 May00:456.5L05:4310.0H12:38-1.4L19:5211.3H
Tue 24 May01:266.6L06:189.7H13:15-1.5L20:3011.4H
Wed 25 May02:096.7L06:569.4H13:55-1.4L21:1211.5H
Thu 26 May02:586.6L07:399.0H14:39-1.0L21:5511.5H
Fri 27 May03:536.3L08:328.6H15:26-0.4L22:4111.5H
Sat 28 May04:535.8L09:398.1H16:170.4L23:2911.5H
Sun 29 MayT05:575.0L10:587.8H17:151.4L
Mon 30 May00:1611.6H06:583.8L12:247.8H18:182.5L
Tue 31 May01:0211.7H07:522.4L13:498.3H19:243.4L

QR code: http://www.dairiki.org/tides/monthly.php/sea Available online at

The data in the above table was generated using the program xtide, written by David Flater.
No guarantees as to the correctness of this data are made or implied.
Do not rely on it to make decisions which can result in harm to anyone or anything.

  Support this site. Make a donation!  

Suggestions, questions and comments regarding this page are welcomed.
Here is a form you can use to submit them.
Or, if you have public comments, feel free to add them below.