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

1.8 ft MLLW Next: High Tide (4.0 ft) at 1:56 AM

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

Water Temp

64.9°F

The Battery

Surge Anomaly

+0.28 ft

vs Astronomical

Marine Wind

8 mph

310° · 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: 4.8 kts

In 96819h 27m Slack at 1:46 AM

Flood Current (35° NE toward Long Island Sound)

24-Hour Velocity Curve · Hell Gate

+ Flood (NE) − Ebb (SW)

Watercraft Transit · Hell Gate

Hazardous (Peak Rip)

Severe tidal rip exceeding 2.5 kts. Heavy turbulence, standing waves near Mill Rock, deep whirlpools, and fast commercial traffic. Watercraft transit through this corridor strictly not advised.

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

Dry Seawall

Water levels safely below riprap seawall lip across island promenades.

Est. Peak: 3.5 ft MLLW Seawall: +10.7 ft

Shoreline Fishing

Optimal Moving Water

Striped bass actively feeding in current rips near Southpoint Park and Lighthouse riprap.

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.