Dictionary term
Diurnal Tide
Direct answer
Diurnal Tide: A Diurnal Tide is a tidal pattern with one high water and one low water during a lunar day.
A Diurnal Tide has one principal high and one principal low each lunar day.
A Diurnal Tide has one principal high and one principal low each lunar day.
A Sun–Earth orientation for seasonal, atmospheric, tidal, and terrestrial terms.Quick reference
- Use when
- Use Diurnal Tide when reading station predictions in regions where once-daily constituents dominate.
- Do not use it for
- Do not infer the local tide type from latitude alone; consult an official station analysis.
- Reference category
- Seasons & Earth Almanac
- Related terms
- Semidiurnal Tide, Mixed Tide, Astronomical Season, Equinox
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The story behind Diurnal Tide
Global tide mapping showed that basin shape and constituent response produce strongly diurnal regimes in some seas and gulfs.
Diurnal Tide in spiritual tradition
Spiritually, a diurnal tide shows that one global forcing can create different local rhythms.
Diurnal Tide: fact and faith, kept distinct
This is a factual calendar, astronomy, Earth-science, cultural-history, or observational reference. It can support wonder and practical planning without becoming a claim of fate, spiritual causation, or private revelation.
Diurnal Tide in numerology
Diurnal Tide is not a numerology claim. Any numbers attached to it should retain their ordinary scientific, calendrical, navigational, or historical meaning unless a separate symbolic interpretation is clearly labeled.
Why Diurnal Tide matters
Its longer single cycle differs substantially from the twice-daily pattern many visitors expect.
Diurnal Tide at work: an example
Parts of the Gulf of Mexico commonly experience a predominantly Diurnal Tide.
Where interpretation stops
Diurnal Tide is presented as sourced astronomy, calendrical, Earth-science, cultural, or instrument-history reference. Definitions should distinguish measured phenomena from civil convention and historical interpretation, preserve location and time dependencies, and avoid turning factual sky data into a deterministic personal claim.
Sources and editorial method
Research references used for this entry include:
- NOAA Tides and Currents Glossary - Operational definitions for tides, tidal currents, ranges, datums, bores, and amphidromic systems.
- Source
- The Great Almanac Dictionary
- Category
- Seasons & Earth Almanac
- Also appears in
- Seasons & Earth Almanac
- Aliases
- None listed
- Last updated
- 2026-07-16
Check the once-daily tide regime
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More in Seasons & Earth Almanac
- Glory
- March Equinox
- Nautical Twilight
- Season Length Asymmetry
- Tidal Datum
- Astronomical Dusk
- Civil Dusk
Common questions
What is Diurnal Tide?
A Diurnal Tide is a tidal pattern with one high water and one low water during a lunar day.
How is Diurnal Tide used in an almanac?
Use Diurnal Tide when reading station predictions in regions where once-daily constituents dominate.
What should I avoid when interpreting Diurnal Tide?
Do not infer the local tide type from latitude alone; consult an official station analysis.
