Spring tides, with the highest highs and lowest lows, happen at which moon phases?

New and full moon.

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  1. First and third quarter
  2. New moon and full moon ✔
  3. Only during the season of spring

Why: At new and full moon the sun and moon line up and their pulls add together. That gives higher highs and lower lows.

Huh, didn't know that: Spring tides occur twice each lunar month all year, regardless of season.

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References

Answer: New moon and full moon. At new and full moon the sun and moon line up and their pulls add together. That gives higher highs and lower lows.

  1. NOAA Spring tides and neap tides oceanservice.noaa.gov/facts/springtide.html
    Spring tides occur twice each lunar month all year long without regard to the season.
    Checked 2026-10-10.

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