XTide downloads

Warning for Windows users

XTide was designed for Unix and X11, not Microsoft Windows.  If you want to try to use it under Windows anyway, there's a precompiled binary for the command-line client, and there are also some ports.  However, these are all supported by their respective maintainers.  Please route support questions accordingly.


Except for the contrib files that are external links, all of the following can be downloaded by anonymous FTP from ftp://ftp.flaterco.com/xtide/.

Harmonics files

If you are looking for data for countries other than the U.S., read this FAQ.

filebuilt withworks withdescription
harmonics-dwf-20161231-free.tar.bz2libtcd 2.2.7-r2XTide 2.8+All data for the U.S. and associated locales available from the National Ocean Service web site as of 2016-12-18.  List of included locations
harmonics-dwf-20161231-SQL.tar.bz2Postgres 9.6.1Harmbase2Dump of Harmbase2 database.

libtcd source code distribution

XTide source code distribution

It has become popular among app developers to derive works from the ancient final release of XTide version 1 because the C code of XTide 1 is simpler.  Cosmetic issues aside, XTide 2 implements a better algorithm for estimating water levels at subordinate stations and correctly handles more of the unusual cases.

World Vector Shoreline data

World Vector Shoreline data for optional use with XTide 2.5 or newer.  37 MB.

These files were published on the National Geophysical Data Center (NGDC) 5-Minute Gridded Global Relief Data CD-ROM (ETOPO5), 1993, and are public domain.  They are available from NOAA at http://www.ngdc.noaa.gov/mgg/global/relief/ETOPO5/BOUNDARY/WVS.  Related information is available at http://www.ngdc.noaa.gov/mgg/fliers/93mgg01.html.  If the files are obtained from NOAA, the filenames must be changed to all lowercase letters to work with XTide.

Contrib packages and patches


For experts


Other materials:

See also the IHO list of constituents in the next section.

Miscellaneous government publications

IHO list of constituents, downloaded from http://www.iho.shom.fr/COMMITTEES/TC/Constituents.pdf on 2004-08-13 and 2006-08-25.

Link:  NOS popular publications page

Manual of Harmonic Analysis and Prediction of Tides.  Special Publication No. 98, Revised (1940) Edition (reprinted 1958 with corrections; reprinted again 1994).  United States Government Printing Office, 1994.  Downloaded from NOAA Central Library via NOAA's Historical Map & Chart Collection, 2015-04-27.

Computer Applications to Tides in the National Ocean Survey.  Supplement to Manual of Harmonic Analysis and Prediction of Tides (Special Publication No. 98).  National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce, January 1982.  Downloaded from NOS, 2016-12-18.

Tide and Current Glossary.  National Ocean Service, January 2000.  Downloaded from NOS, 2003-12-19.

Tidal Datums and their Applications.  NOAA Special Publication NOS CO-OPS 1, June 2000.  Downloaded from NOS, 2004-08-27.

Computational Techniques for Tidal Datums Handbook.  NOAA Special Publication NOS CO-OPS 2, September 2003.  Downloaded from NOS, 2007-03-01.

Tidal Analysis and Prediction.  NOAA Special Publication NOS CO-OPS 3, July 2007.  Downloaded from NOS, 2014-12-28.

Nathaniel Bowditch, LL.D.  The American Practical Navigator:  An Epitome of Navigation.  NIMA Pub. No. 9, Bicentennial Edition, 2002.  Downloaded from NGA, 2004-09-28.  42 MB.  Chapter 9 is a tutorial on tides and currents.