Station Name: GREAT SOUTH BAY AT WEST SAYVILLE NY
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 0 feet

Nearest Address:
198 Atlantic Ave
West Sayville, NY 11796
Suffolk County

GPS Coordinates: 40.72105556, -73.09125

Nearby Water Temperatures

Coastal Flood Watch issued February 20 at 4:27PM EST until February 23 at 6:00AM EST by NWS Upton NY

Effective: Fri February 20, 2026, 4:27 PM
Expires: Sat February 21, 2026, 5:00 PM

* WHAT...1 1/2 to 2 1/2 ft of inundation above ground level possible in vulnerable areas near the waterfront and shoreline. * WHERE...Northeast Suffolk and Southeast Suffolk Counties. * WHEN...From Sunday evening through late Sunday night. * COASTAL FLOOD IMPACTS...Widespread moderate flooding of vulnerable areas near the waterfront and shoreline possible. 1 1/2 to 2 1/2 ft of inundation above ground level possible in low lying, vulnerable areas. This would result in numerous road closures and cause widespread flooding of low lying property including parking lots, parks, lawns and homes/businesses with basements near the waterfront. Vehicles parked in vulnerable areas near the waterfront will likely become flooded. Flooding will also extend inland from the waterfront along tidal rivers and bays. Ice cover in the bays and harbors could exacerbate flooding and cause damage to northeast to east facing shoreline structures. * SHORELINE IMPACTS...Breaking surf of 4 to 8 ft along Gardiners Bay, particularly Orient Point, will cause beach flooding and dune erosion during the time of high tide. This may also exacerbate splashover flooding of shorelines roads and properties behind protective dunes, structures and seawalls. Minor damage to shoreline structures possible. * ADDITIONAL DETAILS...This water level forecast will be highly dependent on timing of windshift from east northeast to north gales with respect to the time of high tide, and will be refined over the next 24 hours. Ice cover in the bays and harbors could exacerbate flooding and cause damage to northeast to east facing shoreline structures.

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.

Coastal Flood Watch issued February 20 at 4:27PM EST until February 23 at 5:00AM EST by NWS Upton NY

Effective: Fri February 20, 2026, 4:27 PM
Expires: Sat February 21, 2026, 5:00 PM

* WHAT...1 1/2 to 2 1/2 ft of inundation above ground level possible in vulnerable areas near the waterfront and shoreline. * WHERE...Bronx, Northwest Suffolk, Northern Queens and Northern Nassau Counties. * WHEN...Late Sunday night. * COASTAL FLOOD IMPACTS...Widespread moderate flooding of vulnerable areas near the waterfront and shoreline possible. 1 1/2 to 2 1/2 ft of inundation above ground level possible in low lying, vulnerable areas. This would result in numerous road closures and cause widespread flooding of low lying property including parking lots, parks, lawns and homes/businesses with basements near the waterfront. Vehicles parked in vulnerable areas near the waterfront will likely become flooded. Flooding will also extend inland from the waterfront along tidal rivers and bays. Ice cover in the bays and harbors could exacerbate flooding and cause damage to northeast to east facing shoreline structure. * SHORELINE IMPACTS...Breaking surf of 3 to 5 ft along north and east facing shorelines will cause beach flooding and dune erosion during the time of high tide. This may also exacerbate splashover flooding of shorelines roads and properties behind protective dunes, structures and seawalls. Minor damage to shoreline structures possible. * ADDITIONAL DETAILS...This water level forecast will be highly dependent on timing of windshift from east northeast to north gales with respect to the time of high tide, and will be refined over the next 24 hours. Ice cover in the bays and harbors could exacerbate flooding and cause damage to northeast to east facing shoreline structure.

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.

Coastal Flood Watch issued February 20 at 4:27PM EST until February 23 at 4:00AM EST by NWS Upton NY

Effective: Fri February 20, 2026, 4:27 PM
Expires: Sat February 21, 2026, 5:00 PM

* WHAT...1 1/2 to 2 1/2 ft, locally 3 ft, of inundation above ground level possible in vulnerable areas near the waterfront and shoreline. * WHERE...Southwest Suffolk and Southern Nassau Counties. * WHEN...From Sunday evening through late Sunday night. * COASTAL FLOOD IMPACTS...Widespread moderate flooding of vulnerable areas near the waterfront and shoreline possible. Expect 1 1/2 to 2 1/2 ft, locally 3 ft of inundation above ground level possible in low lying, vulnerable areas. This would result in numerous road closures and cause widespread flooding of low lying property including parking lots, parks, lawns and homes/businesses with basements near the waterfront. Vehicles parked in vulnerable areas near the waterfront will likely become flooded. Flooding will also extend inland from the waterfront along tidal rivers and bays. Ice cover in the bays and harbors could exacerbate flooding and cause damage to northeast to east facing shoreline structures. * SHORELINE IMPACTS...Breaking surf of 4 to 8 ft along the ocean front will cause widespread beach flooding and erosion during the time of high tide. Areas of dune erosion are likely, with localized washovers possible where dunes are compromised. * ADDITIONAL DETAILS...This water level forecast will be highly dependent on timing of windshift from east northeast to north gales with respect to the time of high tide, and will be refined over the next 24 hours. Ice cover in the bays and harbors could exacerbate flooding and cause damage to northeast to east facing shoreline structures.

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.

Winter Storm Watch issued February 20 at 10:35PM EST until February 23 at 6:00PM EST by NWS Upton NY

Effective: Fri February 20, 2026, 10:35 PM
Expires: Sat February 21, 2026, 6:45 AM

* WHAT...Blizzard conditions possible. Total snow accumulations between 10 and 13 inches possible. Winds could gust as high as 45 mph. * WHERE...Northeast Suffolk, Northwest Suffolk, Southeast Suffolk, and Southwest Suffolk Counties. * WHEN...From Sunday morning through Monday afternoon. * IMPACTS...Travel could be very difficult to impossible. Areas of blowing snow could significantly reduce visibility. The hazardous conditions could impact the Monday morning and evening commutes. The combination of gusty winds and heavy wet snow could bring down tree branches.

Prepare for possible blizzard conditions. Continue to monitor the latest forecasts for updates on this situation.

Winter Storm Watch issued February 20 at 10:35PM EST until February 23 at 6:00PM EST by NWS Upton NY

Effective: Fri February 20, 2026, 10:35 PM
Expires: Sat February 21, 2026, 6:45 AM

* WHAT...Heavy snow possible. Total snow accumulations between 6 and 10 inches possible. Winds could gust as high as 40 mph. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...From Sunday morning through Monday afternoon. * IMPACTS...Travel could be very difficult. Areas of blowing snow could significantly reduce visibility. The hazardous conditions could impact the Monday morning and evening commutes. The combination of gusty winds and heavy wet snow could bring down tree branches.

Monitor the latest forecasts for updates on this situation.