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 May 2013: The station at Merrick was destroyed by Superstorm Sandy (to be exact, the building the station was attached to was destroyed when a large yacht was blown through it. We will rebuild and expect to be back online later this year. Thanks to all for their support!
Bay Tide
See notes below regarding level references.
Time 07/31 17:18 Highest, last 24 hr Lowest, last 24 hr
Water level -1.2 feet (-0.4 meters) MSL
-0.0 feet NGVD29
1.8 feet ( 0.6 meters) MSL
3.0 feet NGVD29
at 07/30 23:12
-1.7 feet (-0.5 meters) MSL
-0.6 feet NGVD29
at 07/31 06:06
Tide Tide is ebbing.
Rate of change: -0.4 feet/hr
(-0.14 meters/hr).
Water temperature 74 deg F (23deg C) 74 deg F (24deg C)
at 07/31 16:24
32deg F ( 0 deg C)
at 07/30 22:06
Weather - note times below are GMT (EST+5 hours, EDT+4 hours)
Weather Observations at Merrick, NY, USA
Time Last Updated on Jul 31 2014, 9:35 pm BST   Maximum, last 24 hr Minimum, last 24 hr
Average wind speed 16 mph 21 mph
at 8:46pm
Wind gust 0 mph [no data] mph
at [no data]
Wind direction Southeast : 156 deg true    
STDEV Wind Direction [no data] deg    
Wind speed change - 1 hour trend ND    
Air temperature 75.5 deg F (24.2 deg C) 76.3 deg F (24.44 deg C)
at 6:09pm
67.8 deg F (19.44 deg C)
at 10:04am
Barometric pressure 30 in Hg (1018 mbar) 30 in Hg (0 mbar)
at 12:14pm
30 in Hg (0 mbar)
at 12:00am
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.