U.S. Coast Guard Academy tidal current predictions

Now

Ebb 0.2 ktToward S (182°)

Next slack

4:58 AMEDT

Next max flood

0.4 kt7:44 AM

Next max ebb

0.4 kt2:04 PM

Knots along the channel: above the line the flood, running in toward N (358°); below it the ebb, running out toward S (182°). Times are Eastern Daylight Time. Today: ebb 0.3 kt 1:12 AM, slack 4:58 AM, flood 0.4 kt 7:44 AM, slack 11:37 AM, ebb 0.4 kt 2:04 PM, slack 5:30 PM, flood 0.4 kt 7:43 PM, slack 11:44 PM.

• Storm Warning Storm Warning issued September 26 at 2:21PM EDT until September 27 at 12:00PM EDT by NWS Upton NYUntil 12:00 PM
  Full text

  * WHAT...Northeast winds 30 to 40 kt with gusts up to 55 kt. Seas 5 to 8 feet for parts of Gardiners Bay and Eastern Long Island Sound. * WHERE...Long Island Sound east of Port Jefferson and New Haven, Peconic and Gardiners Bays, and South Shore Bays from Jones Inlet through Shinnecock Bay. * WHEN...Until noon EDT Sunday. * IMPACTS...Storm force winds and hazardous seas will capsize or damage vessels and reduce visibility.

  Mariners should remain in port, alter course, and/or secure the vessel for severe conditions.

The flood is the tidal current running in from the sea, the ebb the current running back out. Slack water is the short turn between them, when the current is weakest: the time to cross a strong channel, anchor, or dive. Slack in a channel is not the time of high or low tide; it can come hours after.

Speeds are knots along the channel's main axis, and directions are degrees true toward which the water flows, as NOAA prints its tables. A current against the wind stands the waves up steep and close together.

Predictions are astronomical: the moon and the sun, not the weather. Strong wind, river flow after heavy rain and storm surge all change the real current.

• New London State PierHarmonic current station1.1 mi
• Groton, Thames River, Pier 6Current meter (NOAA PORTS)1.3 mi
• Smith CoveHarmonic current station1.6 mi
• Fort Trumbull State ParkHarmonic current station2.0 mi
• New London Harbor entranceHarmonic current station3.8 mi
• Allyn PointHarmonic current station4.8 mi
• Thames River ApproachHarmonic current station5.5 mi
• Niantic (Railroad Bridge)Subordinate current station5.6 mi

• Tide times at New London 0.3 mi
• Tide times at Yale boathouse 3.9 mi
• Tide times at Niantic, Niantic River 6.1 mi
• Forecast for New London, CT
• Open the live map with tidal currents
• All tidal current stations in Connecticut

Tidal current predictions from NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS), station LIS1007, bin 8: original at NOAA. Marine alerts from the National Weather Service.