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Tidal Time Calculator
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Tidal Time Calculator
Calculate high/low tide times from known high tide, tidal pattern, and lunar phase.
Fill in the fields and click Calculate.
Tidal Pattern at Location
Semi-Diurnal (2 highs/2 lows — Atlantic coast)
Diurnal (1 high/1 low — Gulf of Mexico)
Mixed (irregular — Pacific coast)
Last Known High Tide (time)
Moon Phase
New Moon — minimal tidal range
First Quarter
Full Moon — maximum range (spring tides)
Last Quarter
Calculate Result