Roosevelt Island Datum (Queensboro Bridge · Station 8518687) Rising Tide

3.7 ft MLLW Next: High Tide (4.5 ft) at 12:24 PM

Astronomical water elevation benchmark for the East River strait. Seawalls across the island stand at approximately +10.7 ft MLLW.

Water Temp

66.7°F

The Battery

Surge Anomaly

+2.36 ft

vs Astronomical

Marine Wind

29 mph

50° · LGA Airport

East River Current Corridors

The East River strait splits around Roosevelt Island into two distinct channels, converging north at Hell Gate. Select a corridor to inspect real-time flow velocity, slack water timing, and watercraft navigation conditions.

Hell Gate · Off Mill Rock & Astoria

Peak Today: 5.2 kts

In 21326h 0m Slack at 12:03 AM

Slack Water (Minimal hydraulic current)

24-Hour Velocity Curve · Hell Gate

+ Flood (NE) − Ebb (SW)

Watercraft Transit · Hell Gate

Optimal Slack Window

Minimal current velocity (< 1.0 kt). Safe transit window for human-powered craft passing through from off-island launches (such as Hallets Cove in Astoria). Note: Roosevelt Island has no public boat ramps, put-ins, or landing docks.

Safe Window: Slack ± 25m

No boat launches on island

Island Water Elevation & Astronomical Forecast

Astronomical water elevation predictions and weekly tides for Roosevelt Island measured at the Queensboro Bridge (Station 8518687) relative to Mean Lower Low Water (MLLW).

24-Hour Water Elevation (Feet MLLW) Station 8518687 · Queensboro Bridge

Promenade Seawall Clearance

Promenade Splashover Risk

Water level approaching or overtopping low promenade seawalls near Southpoint Park and Lighthouse Point.

Est. Peak: 7.6 ft MLLW Seawall: +10.7 ft

Shoreline Fishing

Slow Bite (Slack)

Water movement has stalled. Fish hold deep until the tide turns and current resumes.

Targets: Striped Bass, Bluefish (Southpoint & Lighthouse riprap)

7-Day High & Low Tide Forecast

Astronomical predictions for Queensboro Bridge (Station 8518687) relative to Mean Lower Low Water (MLLW). Select any day to inspect its 24-hour curve.