Roosevelt Island Tides mark Roosevelt Island Tides
Roosevelt Island Datum (Queensboro Bridge · Station 8518687) Falling Tide

1.6 ft MLLW Next: Low Tide (0.3 ft) at 8:09 PM

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

Water Temp

70.7°F

The Battery

Surge Anomaly

+1.22 ft

vs Astronomical

Marine Wind

18 mph

60° · 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: 5.0 kts

In 175h 9m Slack at 1:25 AM

Flood Current (35° NE toward Long Island Sound)
24-Hour Velocity Curve · Hell Gate
+ Flood (NE) − Ebb (SW)
-4-20+2+4Slack 0 kts12 AM4 AM8 AM12 PM4 PM8 PM12 AMSlack 1:25 AMSlack 7:48 AMSlack 1:49 PMSlack 8:28 PM

Watercraft Transit · Hell Gate

Moderate Flow (Caution)

Manageable for experienced sea kayakers transiting the channel (1.0 to 2.5 kts). Heavy NYC Ferry wakes and strong rebound chop against vertical seawalls. No landing points along the island.

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
0ft2ft4ft6ftMHHW 5.1ft12 AM4 AM8 AM12 PM4 PM8 PM12 AM4.3ft (High)0.5ft (Low)5.2ft (High)0.3ft (Low)

Promenade Seawall Clearance

Dry Seawall

Water levels safely below riprap seawall lip across island promenades.

Est. Peak: 4.8 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.

Today

20261001

Normal Tide
High Tide 1:35 AM 4.3 ft
Low Tide 7:22 AM 0.5 ft
High Tide 1:55 PM 5.2 ft
Low Tide 8:09 PM 0.3 ft
Waning

Friday

20261002

Normal Tide
High Tide 2:29 AM 4.2 ft
Low Tide 8:22 AM 0.7 ft
High Tide 2:51 PM 5.1 ft
Low Tide 9:10 PM 0.4 ft
Third Quarter

Saturday

20261003

Normal Tide
High Tide 3:27 AM 4.1 ft
Low Tide 9:24 AM 0.8 ft
High Tide 3:50 PM 4.9 ft
Low Tide 10:11 PM 0.4 ft
Third Quarter

Sunday

20261004

Normal Tide
High Tide 4:30 AM 4.1 ft
Low Tide 10:28 AM 0.8 ft
High Tide 4:54 PM 4.8 ft
Low Tide 11:12 PM 0.4 ft
Third Quarter

Monday

20261005

Normal Tide
High Tide 5:36 AM 4.2 ft
Low Tide 11:31 AM 0.8 ft
High Tide 5:59 PM 4.8 ft
Third Quarter

Tuesday

20261006

Normal Tide
Low Tide 12:08 AM 0.3 ft
High Tide 6:37 AM 4.5 ft
Low Tide 12:31 PM 0.6 ft
High Tide 6:57 PM 4.9 ft
Waning

Wednesday

20261007

Normal Tide
Low Tide 1:02 AM 0.2 ft
High Tide 7:30 AM 4.8 ft
Low Tide 1:27 PM 0.5 ft
High Tide 7:50 PM 4.9 ft
Waning