Hampton Harbor, MA Tide Gauge

Tide gauge located in Hampton Harbor, MA. Funded by NERACOOS. Data is reported in elevation above MLLW (NAVD88) in feet and also converted to meters. NOAA uses Mean Lower Low Water (MLLW), which is the average height of the lowest tide recorded at a tide station each day during a 19-year recording period, known as the National Tidal Datum Epoch.[5] MLLW is only a mean, so some tidal levels may be negative relative to MLLW; see also mean low water spring. The 19-year recording period is the nearest full year count to the 18.6-year cycle of the lunar node regression, which has an effect on tides. At this location Mean Sea Level (MSL) is 1.308 meters above MLLW Benchmark used: NOAA Station ID: 8440452 - PLUM ISLAND, MERRIMACK RIVER ENTRANCE (with extrapolated estimate) MSL meters = (MLLW ft. * 0.3048) + GUAGE location correction.

Data and Resources

Field Value
access_constraints []
bbox-east-long -70.81849
bbox-north-lat 42.90011
bbox-south-lat 42.90009
bbox-west-long -70.81851
contact-email Francesco.Peri@umb.edu
coupled-resource [{"href": ["#DataIdentification"], "uuid": [], "title": []}, {"href": ["#DataIdentification"], "uuid": [], "title": []}]
dataset-reference-date [{"type": "creation", "value": "2021-06-17"}]
guid ONSET_hamptonbay_hourly_water_level
licence []
metadata-date 2021-06-17
metadata-language eng
metadata_type geospatial
old-spatial {"type": "Polygon", "coordinates": [[[-70.81851, 42.90009], [-70.81849, 42.90009], [-70.81849, 42.90011], [-70.81851, 42.90011], [-70.81851, 42.90009]]]}
resource-type dataset
responsible-party [{"name": "Onset Hobolink", "roles": ["pointOfContact"]}]
spatial {"type": "Polygon", "coordinates": [[[-70.81851, 42.90009], [-70.81849, 42.90009], [-70.81849, 42.90011], [-70.81851, 42.90011], [-70.81851, 42.90009]]]}
spatial-data-service-type ERDDAP tabledap
spatial_harvester true
temporal-extent-begin 2019-09-25T17:00:00Z
temporal-extent-end 2020-12-31T22:00:00Z
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • ckan
  • gauge
  • geo
  • geoss
  • hampton
  • hobolink
  • latitude
  • longitude
  • mean
  • meter
  • mllw
  • msl
  • national
  • neracoos
  • north-america
  • onset
  • sea
  • station
  • temp
  • temperature
  • tide
  • time
  • united-states
  • water-level
isopen False
metadata_created 2025-11-22T06:25:14.502721
metadata_modified 2025-11-22T06:25:14.502726
notes Tide gauge located in Hampton Harbor, MA. Funded by NERACOOS. Data is reported in elevation above MLLW (NAVD88) in feet and also converted to meters. NOAA uses Mean Lower Low Water (MLLW), which is the average height of the lowest tide recorded at a tide station each day during a 19-year recording period, known as the National Tidal Datum Epoch.[5] MLLW is only a mean, so some tidal levels may be negative relative to MLLW; see also mean low water spring. The 19-year recording period is the nearest full year count to the 18.6-year cycle of the lunar node regression, which has an effect on tides. At this location Mean Sea Level (MSL) is 1.308 meters above MLLW Benchmark used: NOAA Station ID: 8440452 - PLUM ISLAND, MERRIMACK RIVER ENTRANCE (with extrapolated estimate) MSL meters = (MLLW ft. * 0.3048) + GUAGE location correction.
num_resources 8
num_tags 26
title Hampton Harbor, MA Tide Gauge