# HEADLINE
--------------------
COASTAL FLOOD ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 9 PM EDT THIS EVENING
# SUMMARY
--------------------
GREAT SOUTH BAY AT LINDENHURST NY MLLW CATEGORIES - MINOR 3.1 FT, MODERATE 3.6 FT, MAJOR 4.1 FT MHHW CATEGORIES - MINOR 1.5 FT, MODERATE 2.0 FT, MAJOR 2.5 FT
TOTAL TOTAL DEPARTURE DAY/TIME TIDE TIDE FROM NORM WAVES FLOOD FT MLLW FT MHHW FT FT IMPACT -------- --------- --------- --------- ------- -------- 21/07 AM 2.7/ 3.2 1.2/ 1.7 1.7/ 2.2 0 NONE 21/06 PM 3.2/ 3.7 1.6/ 2.0 2.1/ 2.6 0 MINOR 22/09 AM 3.0/ 3.5 1.4/ 1.9 1.8/ 2.2 0 MINOR 22/07 PM 2.8/ 3.4 1.3/ 1.8 1.7/ 2.2 0 MINOR
GREAT SOUTH BAY AT WEST SAYVILLE NY MLLW CATEGORIES - MINOR 3.1 FT, MODERATE 3.6 FT, MAJOR 4.1 FT MHHW CATEGORIES - MINOR 1.7 FT, MODERATE 2.2 FT, MAJOR 2.7 FT
TOTAL TOTAL DEPARTURE DAY/TIME TIDE TIDE FROM NORM WAVES FLOOD FT MLLW FT MHHW FT FT IMPACT -------- --------- --------- --------- ------- -------- 21/07 AM 2.6/ 3.1 1.2/ 1.7 1.6/ 2.0 1 NONE 21/08 PM 3.0/ 3.5 1.6/ 2.0 1.8/ 2.2 1 MINOR 22/09 AM 2.8/ 3.4 1.5/ 2.0 1.8/ 2.2 1 NONE=MINOR 22/09 PM 2.7/ 3.2 1.4/ 1.9 1.6/ 2.0 1 NONE
GREAT SOUTH BAY AT WATCH HILL/FIRE ISLAND NY MLLW CATEGORIES - MINOR 3.2 FT, MODERATE 3.7 FT, MAJOR 4.2 FT MHHW CATEGORIES - MINOR 1.7 FT, MODERATE 2.2 FT, MAJOR 2.7 FT
TOTAL TOTAL DEPARTURE DAY/TIME TIDE TIDE FROM NORM WAVES FLOOD FT MLLW FT MHHW FT FT IMPACT -------- --------- --------- --------- ------- -------- 21/07 AM 2.7/ 3.2 1.2/ 1.7 1.7/ 2.2 1 NONE 21/08 PM 3.0/ 3.5 1.5/ 2.0 1.8/ 2.2 1 MINOR 22/08 AM 2.7/ 3.2 1.3/ 1.8 1.8/ 2.2 1 NONE 22/08 PM 2.8/ 3.4 1.4/ 1.9 1.8/ 2.2 1 NONE
# DETAILS
--------------------
WHAT
Up to one foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline.
WHERE
Southwest Suffolk County.
WHEN
From 5 PM this afternoon to 9 PM EDT this evening.
IMPACTS
Minor flooding in the more vulnerable locations near the waterfront and shoreline. Some roads and low lying properties including parking lots, parks, lawns, and homes and businesses with basements near the waterfront will experience minor flooding.
ADDITIONAL DETAILS
Additional localized minor coastal flooding possible during times of high tide on Thursday.
ISSUED AT
Wednesday, October 21, 2026 at 2:26 AM EDT
ISSUED BY
National Weather Service New York NY
HEADER
Coastal Hazard Message
# PRECAUTIONARY/PREPAREDNESS ACTIONS
--------------------
If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.
# AREAS AFFECTED
--------------------
Southwest Suffolk
