NDBC SWPM4 · Tide gauge · Great Lakes

S.W. Pier, St. Marys River, MI

46°30.1′N 084°22.4′W

Reading the gauge's spectra from NDBC…

At the shore, at this coastline's 1:10m scale 1 nmi WNW of Sault Ste. Marie Coastline: Natural Earth · places: GeoNames

A simulation of the sea at this gauge, built from its wave measurements. The wave heights, periods and directions are real; the exact position of each crest is not. How it is made

This page is drawn by script. The CSV and JSON downloads have every observation.

Every measurement · last 2 weeks

What the gauge reports

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