Description
Track any East Coast tide, no matter where you are, with the Maximum Harbormaster Tide Clock. This instrument uses the average time between lunar high tides across the Atlantic Ocean (12 hours and 25 minutes) and estimates the time to the next tide.
A single AA battery powers the Harbormaster Tide Clock. Available in both silver and black dial faces. Purchasing your first Maximum instrument? This guide may help.
Features:
- Includes gauge
- Timed to the Atlantic Ocean’s average tides
- Five-year warranty
The Harbormaster is also available as part of the Newport weather station.
Fluctuations in conditions, location, and the distance of the Moon from Earth can affect the average time between high tides, so your Harbormaster may require adjustment from time to time. It cannot be used for Pacific Ocean tide tracking.




