RIVER GAUGE · GREAT SOUTH BAY
Great South Bay at Watch Hill (IN MLLW)
Suffolk County, New York
Water level1.54 ft
Flow—
Last readingSep 16, 2026, 5:00 PM UTC (last recorded)
Action2.8 ft
Minor flood3.2 ft
Moderate flood3.7 ft
Major flood4.2 ft
The past week
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Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Oct 28, 2012 | 7.73 ft | — |
| Nov 7, 2012 | 4.14 ft | — |
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