Merrick station location
Station location

Sea Conditions at

Long Island New York USA
Latitude 40 degrees 38.6 minutes North
Longitude 73 degrees 32.4 minutes West

A service of LIShore.

Page last updated 09/25/2013 10:32 EDT

STATUS NOTICE Fall 2013: The station at Merrick was destroyed by Superstorm Sandy and has been rebuilt.
Bay Tide
See notes below regarding level references.
Time 12/20 01:06 Highest, last 24 hr Lowest, last 24 hr
Water level -1.7 feet (-0.5 meters) MSL
-0.6 feet NGVD29
1.7 feet ( 0.5 meters) MSL
2.8 feet NGVD29
at 12/19 05:48
-2.1 feet (-0.7 meters) MSL
-1.0 feet NGVD29
at 12/19 12:30
Tide Tide is flooding.
Rate of change: 0.4 feet/hr
( 0.12 meters/hr).
Water temperature 40 deg F ( 5deg C) 41 deg F ( 5deg C)
at 12/19 10:36
32deg F ( 0 deg C)
at 12/19 19:00
Weather - note times below are GMT (EST+5 hours, EDT+4 hours)
Weather Observations at Merrick, NY, USA
Time Last Updated on Dec 20 2014, 7:10 am GMT   Maximum, last 24 hr Minimum, last 24 hr
Average wind speed 4 mph 16 mph
at 12:24am
Wind gust 0 mph [no data] mph
at [no data]
Wind direction North : 14 deg true    
STDEV Wind Direction [no data] deg    
Wind speed change - 1 hour trend ND    
Air temperature 30.0 deg F (-1.1 deg C) 34.6 deg F (1.11 deg C)
at 12:00am
30 deg F (-1.11 deg C)
at 7:09am
Barometric pressure 30 in Hg (1021 mbar) 30 in Hg (0 mbar)
at 4:42am
30 in Hg (0 mbar)
at 1:41am
Barometer - 1 hour trend Steady    


  1. Real-time data are unchecked and preliminary. Please read this disclaimer.
  2. MSL = measurement referenced to Mean Sea Level. Seasonal and weather system biases highly affect estuarine water levels, therefore the MSL datum for this station is preliminary until data are collected over a sufficient length of time to define it accurately.
  3. NGVD29 = measurement referenced to National Geodetic Vertical Datum of 1929.
  4. Daily precipitation resets at solar midnight (midnight EST, 11:00pm EDT). Heated gauge converts frozen preciptation to liquid equivalent.
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LIShore is a project of the School of Marine and Atmospheric Sciences at Stony Brook University in collaboration with the LIShore partners.

Tom Wilson (email: welcomes your comments or questions regarding this web site.