Dimond Reef Tidal Current Predictions, NY

Now

Today, Sat, Sep 26, at 11 ft deep.

Now: SlackTurning
Next slack: 12:50 AMEDT
Next max flood: 1.5 kt8:04 AM
Next max ebb: 0.2 kt2:20 PM

Knots along the channel: above the line the flood, running in toward N (10°); below it the ebb, running out toward SE (137°). Times are Eastern Daylight Time. Today: slack 12:50 AM, slack 2:21 AM, flood 1.5 kt 8:04 AM, slack 12:55 PM, ebb 0.2 kt 2:20 PM, slack 4:22 PM, flood 1.5 kt 8:32 PM.

Alerts in force1

National Weather Service marine and coastal products at this station’s position.

Gale Warning Gale Warning issued September 25 at 2:50PM EDT until September 27 at 6:00AM EDT by NWS Upton NYUntil Sun 6:00 AM
Full text
* WHAT...North winds 25 to 35 kt with gusts up to 40 kt and waves 4 to 7 feet. * WHERE...New York Harbor, including Raritan Bay and Sandy Hook Bay. * WHEN...Until 6 AM EDT Sunday. * IMPACTS...Strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility.
Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions.

7-day current table

Strongest flood this week 1.6 kt, Mon, Sep 28 at 9:35 AM. Strongest ebb 0.2 kt, Sat, Sep 26 at 2:20 PM.

Slack water and maximum currents at Dimond Reef, Eastern Daylight Time; knots, and the direction the water runs toward.
Time	Event	Speed	Toward
Sat, Sep 26
12:50 AM	Slack water
2:21 AM	Slack water
8:04 AM	Maximum flood	1.5 kt	N (10°)
12:55 PM	Slack water
2:20 PM	Maximum ebb	0.2 kt	SE (137°)
4:22 PM	Slack water
8:32 PM	Maximum flood	1.5 kt	N (10°)
Sun, Sep 27
1:22 AM	Slack water
3:34 AM	Slack water
8:49 AM	Maximum flood	1.6 kt	N (10°)
1:55 PM	Slack water
4:55 PM	Slack water
9:16 PM	Maximum flood	1.5 kt	N (10°)
Mon, Sep 28
1:53 AM	Slack water
3:03 AM	Maximum ebb	0.1 kt	SE (137°)
4:37 AM	Slack water
9:35 AM	Maximum flood	1.6 kt	N (10°)
3:41 PM	Slack water
10:01 PM	Maximum flood	1.4 kt	N (10°)
Tue, Sep 29
2:21 AM	Slack water
3:47 AM	Maximum ebb	0.1 kt	SE (137°)
5:22 AM	Slack water
10:22 AM	Maximum flood	1.6 kt	N (10°)
10:47 PM	Maximum flood	1.3 kt	N (10°)
Wed, Sep 30
1:41 AM	Slack water
2:51 AM	Slack water
5:35 AM	Slack water
11:11 AM	Maximum flood	1.6 kt	N (10°)
2:26 PM	Maximum flood	0.2 kt	N (10°)
3:47 PM	Maximum flood	0.3 kt	N (10°)
7:14 PM	Maximum flood	0.2 kt	N (10°)
11:37 PM	Maximum flood	1.2 kt	N (10°)
Thu, Oct 1
2:23 AM	Slack water
5:24 AM	Slack water
12:01 PM	Maximum flood	1.5 kt	N (10°)
3:10 PM	Maximum flood	0.3 kt	N (10°)
4:44 PM	Maximum flood	0.4 kt	N (10°)
8:17 PM	Maximum flood	0.2 kt	N (10°)
Fri, Oct 2
12:32 AM	Maximum flood	1.0 kt	N (10°)
3:27 AM	Slack water
5:06 AM	Maximum flood	0.2 kt	N (10°)
6:27 AM	Maximum flood	0.2 kt	N (10°)
12:54 PM	Maximum flood	1.4 kt	N (10°)
3:58 PM	Maximum flood	0.3 kt	N (10°)
5:31 PM	Maximum flood	0.4 kt	N (10°)
9:16 PM	Maximum flood	0.2 kt	N (10°)

Other depths

NOAA predicts the current at more than one depth here. This page is for the shallowest; the water deeper down turns at different times and runs at different speeds.

Depth	Strongest flood today	Strongest ebb today
11 ft	1.5 kt 8:32 PM	0.2 kt 2:20 PM
18 ft	1.5 kt 7:50 AM	0.2 kt 3:08 PM
31 ft	1.1 kt 7:26 AM

What this means

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.

Nearby8

The closest other NOAA current stations, nearest first.

More for this place

Sources

Tidal current predictions from NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS), station NYH1919, bin 3: original at NOAA. Marine alerts from the National Weather Service.