WWW Tide and Current Predictor

10 Dec 2023: After networking changes at USC, relocate to host tide.arthroinfo.org
20 Sep 2021: After a hardware failure in tbone.biol.sc.edu, temporary move to tide.arthroinfo.org.
29 Sep 2016: Shutdown 20:20 GMT due to campus wide electrical outage.
12 May 2016: Computer replaced after failure due to power outage.
30 Dec 2010: If you are using a mobile device, try the simplified site.

Pick a different site  |  Frequently Asked Questions
Web interface by Dean Pentcheff, calculations and graphics by David Flater's XTide Program

NOT FOR NAVIGATION. This program is furnished in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of merchantability or fitness for a particular purpose. Do not use this program as a basis for any decisions that could result in harm to people, other organisms, or property. Check these predictions against officially sanctioned tables. Agencies like NOAA exist because there is a need for certifiably correct tide predictions. Do not rely on these predictions if you need guaranteed results. There is NO WAY we can get certified data on a zero budget. We rely on users like you to tell us when something is wrong. Please continue to do so.
Remember that weather conditions affect tidal ranges and current speeds, sometimes very strongly.

Humboldt Bay Entrance, California

21 November 2024 - 23 November 2024

40.7667° N, 124.2500° W

2024-11-21  04:48 PST   4.75 feet  High Tide
2024-11-21  07:11 PST   Sunrise
2024-11-21  09:41 PST   3.77 feet  Low Tide
2024-11-21  12:42 PST   Moonset
2024-11-21  15:00 PST   5.53 feet  High Tide
2024-11-21  16:54 PST   Sunset
2024-11-21  22:38 PST   0.04 feet  Low Tide
2024-11-21  22:48 PST   Moonrise
2024-11-22  05:44 PST   4.87 feet  High Tide
2024-11-22  07:12 PST   Sunrise
2024-11-22  11:01 PST   3.65 feet  Low Tide
2024-11-22  13:08 PST   Moonset
2024-11-22  16:09 PST   4.91 feet  High Tide
2024-11-22  16:53 PST   Sunset
2024-11-22  17:29 PST   Last Quarter
2024-11-22  23:32 PST   0.55 feet  Low Tide
2024-11-22  23:52 PST   Moonrise

Prediction Options

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Select presentation options
Length of time to display (ignored by One-Month Calendars)
Change text size (only for browsers supporting font size changes)
Select tide height units:
Suppress credits and warnings on top of page
Suppress sunrise/sunset and lunar information
Printer-friendly bare output   ( Force plot to B&W lines)
Show site information from database
Show the URL that would recreate this prediction
Starting time and time display options
Standard time range:
        Start at: at :


Distant dates (See notes. Available only for boldface sitenames; type in a year 1700-2100; timezone forced to UTC):
        Start at: at :
Hour format:
Show day of week
Select options for plots
Omit mean sea level and datum lines on plot
Omit high/low times on plots (clears overlapping text)
Plot with lines only, not color-filled (graphical plot only)
Pick colors for color elements (graphical plot only):
Colors: black white yellow red skyblue deep-
skyblue		 seagreen blue
Elements:               
Text Color
Datum Line Color
Mean Sea Level Line
Mark Tics Color
Day Background
Night Background
Falling/Ebb Color
Rising/Flood Color

Puzzled by something? Please check the Frequently Asked Questions list.
Send queries about the WWW interface to Dean Pentcheff <tidecomment@gmail.com>.
Send queries about the XTide program to David Flater <dave@flaterco.com>.
WWW Tide/Current Predictor: http://tide.arthroinfo.org
Dean Pentcheff <tidecomment@gmail.com>
Traditionally hosted from: Biological Sciences, University of South Carolina, Columbia SC 29208 USA