What does 5.3 at 13:45 in the popup information mean ?

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RE: Tide Forecast on Windy
Latest posts made by renelis
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RE: Tide Forecast on Windy
What does 5.3 at 13:45 in the popup information mean ?
What does 5.3 at 13:45 in the popup information mean ?
What does 5.3 at 13:45 in the popup information mean ?