Guides

Short, sourced explanations of what a tide prediction is and where it stops.

• Reading predictions, October 17, 2026

  High Tide vs Slack Tide: What NOAA Predicts

  High tide vs slack tide: one is a water height NOAA predicts, the other is a current with no horizontal motion, and the two do not share a clock.

Every guide cites NOAA pages that were fetched the day it was written; the dates are on the methodology page.