Port Jefferson tide times

1. High tide12:45 AM7.1 ft
2. Low tide6:50 AM0.1 ft
3. High tide12:59 PM7.9 ft
4. Low tide7:26 PM-0.2 ft

Feet above mean lower low water. Times are Eastern Daylight Time. Sunrise 6:46 AM, sunset 6:39 PM.

• Coastal Flood Advisory Coastal Flood Advisory issued September 27 at 8:57PM EDT until September 28 at 2:00PM EDT by NWS Upton NYUntil 2:00 PM
  Full text

  * WHAT...One to one and a half feet, locally 2 feet, of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. The highest water levels likely with the Monday morning high tide. * WHERE...Bronx, Northwest Suffolk, Northern Queens and Northern Nassau Counties. * WHEN...From 10 PM this evening to 2 PM EDT Monday. * IMPACTS...Widespread minor to locally moderate coastal flooding is expected in the most vulnerable locations near the waterfront and shoreline. Expect one to one and a half feet, locally 2 feet, of inundation above ground level. Some roads and low lying property including parking lots, parks, lawns and homes/businesses with basements near the waterfront will experience shallow flooding.

  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.

Next moon phases: last quarter Sat, Oct 3, new moon Sat, Oct 10.

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The calendar holds every high and low for the next three months and keeps itself three months ahead.

By 2050, 1.0 ft (Low) to 1.6 ft (High); Intermediate 1.3 ft, likely 1.0 ft to 1.6 ft. By 2100, 1.8 ft (Low) to 6.5 ft (High); Intermediate 3.9 ft, likely 3.1 ft to 4.5 ft.

• Low
• Intermediate-Low
• Intermediate
• Intermediate-High
• High
• Intermediate, likely range

The five scenarios run from 0.3 to 2.0 meters (1 to 6.6 feet) of global rise by 2100, each adjusted for this coast’s sinking or rising land and its ocean. They agree closely to 2050, when most of the rise is already set, and part after it with how fast the ice sheets melt. The likely range is the 17th to 83rd percentile.

See 1 to 10 ft of rise on the map

Heights are feet above mean lower low water (MLLW): the average of the lower of each day’s two low tides over NOAA’s 19-year tidal epoch, and the zero of US tide tables and nautical charts. A low tide below that average is printed as a negative height.

Predictions are astronomical. They account for the moon and the sun, not the weather: onshore wind, low air pressure and high river flow hold the water above the prediction, offshore wind and high pressure hold it below.

Spring tides, the largest ranges of the month, follow the new and full moon by a day or two. Neap tides, the smallest, follow the quarter moons.

• Port Jefferson Harbor entranceTide predictions1.7 mi
• Cedar BeachTide predictions2.0 mi
• Mount Sinai HarborTide predictions2.1 mi
• PatchogueTide predictions14 mi
• Northport, Northport BayTide predictions15 mi
• Black Rock HarborConnecticut · Tide predictions16 mi
• Great River, Connetquot RiverTide predictions16 mi
• Sniffens PointConnecticut · Tide predictions16 mi

• Forecast for Port Jefferson, NY
• Live radar at this station
• Southwestern Suffolk Beaches beach forecast
• September 2026 tide table
• October 2026 tide table
• November 2026 tide table
• December 2026 tide table
• Sea level rise on the map at this station
• All tide stations in New York

Tide predictions and water levels from NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS). Coastal flood, storm surge and high surf products from the National Weather Service. Sea level rise scenarios from the 2022 Interagency Sea Level Rise Technical Report (Sweet et al. 2022), as NOAA publishes them per gauge. Station 8514560: original at NOAA.