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Thread: Surf chart

  1. #1

    Surf chart

    Why is the surf chart graph sometimes bigger, but the swell is smaller?
    For instance:
    http://www.swellinfo.com/surf-foreca...lifornia-north
    On this chart on Sunday at 9am it's going to be 2.1 feet (waist level), but the graph looks bigger on Wednesday at 9am, (chest level) but it's only 1.6 feet.

  2. #2
    Look at the period

  3. #3
    Join Date
    Mar 2012
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    Central FL
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    My guess is the duration of swell period

  4. #4
    Join Date
    May 2006
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    Lewes, DE
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    There could be several reasons, but in this case, its due to the long 19 second period.

    Other reasons, why this may happen, is the combination of multiple swell groups, creating higher overall surf heights then if taking individual swell components alone. This is one of the least understood scenarios in surf forecasting.