Disclaimer
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 don't 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.
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Previous month's tides
Tidal Heights at Friday Harbor, San Juan Island, Washington
Next month's tides
March 2010
48°32.8'N 123°0.6'W  
Tide Tide Tide Tide
  Time Zone is PST   Units are feet
 Mon 01 Mar   0532  8.1H   1121  2.8L   1713  6.8H   2310  1.3L 
 Tue 02 Mar   0556  8.2H   1207  1.8L   1825  6.8H   2352  2.6L 
 Wed 03 Mar   0621  8.3H   1254  1.0L   1937  6.7H 
 Thu 04 Mar   0034  3.9L   0647  8.2H   1342  0.5L   2054  6.7H 
 Fri 05 Mar   0118  5.0L   0714  8.1H   1432  0.2L   2222  6.7H 
 Sat 06 Mar   0210  5.9L   0742  7.8H   1527  0.2L 
 Sun 07 Mar   0004  6.9H   0328  6.5L   0811  7.4H   1626  0.4L 
 Mon 08 Mar   0136  7.2H   0543  6.7L   0844  6.9H   1728  0.5L 
 Tue 09 Mar   0233  7.4H   0756  6.5L   0932  6.5H   1829  0.5L 
 Wed 10 Mar   0313  7.5H   0859  6.0L   1108  6.1H   1924  0.6L 
 Thu 11 Mar   0344  7.5H   0928  5.5L   1246  5.8H   2011  0.7L 
 Fri 12 Mar   0410  7.4H   0948  4.9L   1403  5.8H   2052  0.9L 
 Sat 13 Mar   0430  7.3H   1007  4.3L   1506  5.8H   2128  1.2L 
  Time Zone changes to PDT   Units are feet
 Sun 14 Mar   0547  7.1H   1128  3.6L   1702  5.9H   2301  1.7L 
 Mon 15 Mar   0601  7.0H   1152  2.9L   1754  6.0H   2333  2.3L 
 Tue 16 Mar   0615  7.0H   1218  2.1L   1845  6.1H 
 Wed 17 Mar   0006  2.9L   0628  7.0H   1248  1.4L   1935  6.2H 
 Thu 18 Mar   0039  3.6L   0643  7.1H   1321  0.8L   2028  6.3H 
 Fri 19 Mar   0114  4.3L   0659  7.1H   1359  0.3L   2127  6.4H 
 Sat 20 Mar   0152  4.9L   0719  7.1H   1442  -0.1L   2235  6.5H 
 Sun 21 Mar   0236  5.5L   0742  7.1H   1531  -0.3L   2358  6.6H 
 Mon 22 Mar   0333  6.0L   0811  7.0H   1628  -0.6L 
 Tue 23 Mar   0127  6.8H   0505  6.3L   0851  6.8H   1730  -0.7L 
 Wed 24 Mar   0233  7.0H   0655  6.2L   0953  6.5H   1835  -0.7L 
 Thu 25 Mar   0315  7.2H   0813  5.7L   1130  6.1H   1937  -0.6L 
 Fri 26 Mar   0347  7.3H   0906  4.9L   1321  5.9H   2035  -0.2L 
 Sat 27 Mar   0413  7.4H   0949  3.8L   1500  6.0H   2128  0.5L 
 Sun 28 Mar   0437  7.4H   1030  2.6L   1625  6.3H   2218  1.4L 
 Mon 29 Mar   0501  7.5H   1111  1.4L   1738  6.6H   2306  2.5L 
 Tue 30 Mar   0524  7.6H   1151  0.4L   1845  7.0H   2352  3.6L 
 Wed 31 Mar   0548  7.7H   1232  -0.4L   1948  7.3H 
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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.

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