Observed Water Level Screensaver
The Observed Water Level screensaver shows what a NOAA tide gauge is really measuring, over 48 hours. Distinct from the site's Tide Clock, which shows the prediction — storms and wind can push the water well away from it. It's free, runs in your browser, and ESC exits.
How the Observed Water Level screensaver works
The saver reads NOAA CO-OPS directly in your browser — no key and no account.
What a NOAA tide gauge is really measuring, over 48 hours.
It refreshes on a schedule, so what you see stays current.
Colours can be changed in settings; nothing is stored beyond your own browser.
A worked example
What a NOAA tide gauge is really measuring, over 48 hours. Distinct from the site's Tide Clock, which shows the prediction — storms and wind can push the water well away from it.
Settings & tips
- Accent and Background recolour the display.
- Data comes straight from NOAA CO-OPS in your browser.
- Press ESC to leave fullscreen.
Frequently asked questions
- Is this real data?
- Yes — it comes from NOAA CO-OPS and is refreshed on a schedule.
- How is this different from the Tide Clock?
- The Tide Clock shows the astronomical prediction. This is the water level the gauge actually recorded, which storms, wind and pressure can push well away from prediction.
- Is a key needed?
- No. This source is fully key-less.
- Is it free?
- Yes — free, no download, in your browser.