Great Bay Coastal Buoy

The Great Bay Coastal Buoy is located at 43.0715 degrees N and 70.8678 degrees W, near Portsmouth, NH. The buoy records a suite of measurements and these observations are updated regularly on this page.


Data Access
IOOS Registry of In-situ Observations

Recent observations at the Buoy:



The Buoy This Week:

December 11, 2012

The buoy has been recovered for the winter. We will redeploy in Spring 2013 once the threat of ice on the bay has passed.

Please send us an email with any questions or comments.

All the best,

Tom Gregory (

CDOM Salinity Mixing at the Great Bay Buoy

Flow data from the Lamprey River

Watch the video of the buoy recovery!

Interpreting These Graphs

The graphs to the left show recent observations at the Great Bay Coastal Buoy as compared to historical measurements made in Great Bay over the last 13 years. The colors represent the percentages of all observations during this 13 year period that fall within a specific range.