About 212 results
Open links in new tab
  1. What are spring and neap tides? - NOAA's National Ocean Service

    Spring tides occur twice each lunar month all year long without regard to the season. 'Neap tides,' which also occur twice a month, happen when the sun and moon are at right angles to each other.

  2. What is a perigean spring tide? - NOAA's National Ocean Service

    The difference between perigean spring tides and spring tides that occur closer to the moon’s apogee are location dependent and significantly influenced by tidal range, but can be quite large.

  3. Tidal Variations - The Influence of Position and Distance - Tides and ...

    When the sun, moon, and Earth are in alignment (at the time of the new or full moon), the solar tide has an additive effect on the lunar tide, creating extra-high high tides, and very low, low tides — both …

  4. Do the Great Lakes have tides? - NOAA's National Ocean Service

    Jun 16, 2024 · Studies indicate that the Great Lakes spring tide, the largest tides caused by the combined forces of the sun and moon, is less than five centimeters in height.

  5. NOAA Tide Tables - NOAA's National Ocean Service

    Printed tide tables provide users with tide and tidal current predictions in an easy-to-read format for particular locations. NOAA's Center for Operational Oceanographic Products and Services produce …

  6. Tides and Water Levels: NOAA's National Ocean Service Education

    When the sun, moon, and Earth are in alignment (at the time of the new or full moon), the solar tide has an additive effect on the lunar tide, creating extra-high high tides, and very low, low tides — both …

  7. Tides and Water Levels - NOAA's National Ocean Service

    An area has a diurnal tidal cycle if it experiences one high and one low tide every lunar day. Many areas in the Gulf of Mexico experience these types of tides.

  8. Tides and Water Levels: NOAA's National Ocean Service Education

    The following questions are based on information from the Tutorial on Tides and Water Levels

  9. What are tides? - NOAA's National Ocean Service

    Jun 16, 2024 · Tides are very long-period waves that move through the ocean in response to the forces exerted by the moon and sun. Tides originate in the ocean and progress toward the coastlines where …

  10. Tides and Water Levels: NOAA's National Ocean Service Education

    When the sun and moon are aligned (at the time of full moon or new moon), their gravitational forces act in the same direction and produce more pronounced high and low tides that are called spring tides.