Which Way Does New York’s East River Flow?

Generally north to south — but it’s not a river. It’s a tidal strait connecting Long Island Sound (NE) to Upper New York Bay (SW).

Flow Dynamics

• Tidal reversal: Flood tide → flows north (into Sound); Ebb tide → flows south (to Harbor).
• Net drift: Slightly seaward (south) due to freshwater input (Hudson, Harlem, Bronx Rivers).
• Speed: Up to 4–5 knots (Hell Gate) — dangerous currents.

Course

1. Starts: Throgs Neck (Bronx/Queens border) — where Sound narrows.
2. Passes: Rikers Island, LaGuardia, Randalls/Wards Islands, Roosevelt Island.
3. Manhattan west shore: UES, Midtown, LES, Battery.
4. Brooklyn/Queens east shore: Astoria, LIC, Greenpoint, Williamsburg, DUMBO, Red Hook.
5. Ends: Battery / Governors Island → Upper NY Bay.

Crossings

• Bridges: Throgs Neck, Whitestone, RFK (Triborough), Queensboro (59th St), Williamsburg, Manhattan, Brooklyn.
• Tunnels: Midtown (QMT), Battery (BMT), 63rd St (F train), Steinway (7 train).
• Ferries: NYC Ferry (Astoria, Soundview, Wall St, etc.).

Why "East River"?

Early Dutch/English settlers saw it as river east of Manhattan — name stuck. Hydrologically: strait. Culturally: river.