What the Hudson is doing off Pier 66: tidal currents, water temperature, the forecast, recent rainfall, and whether the river is under a water quality advisory. The same summary our members get in Slack each morning.
Updated Sunday, August 23, 2026 at 11:49pm. This page is a snapshot taken each morning — conditions change through the day, so follow the source links for anything live.
The Hudson is under a water quality advisory until about 2am Mon.
DEP issues these after heavy rain, when combined sewer overflow can discharge into the river. Avoid contact with the water — that includes rolling and rescue practice — until it lifts. Check the DEP dashboard for the current status.
Tidal currents
Predictions for Hudson River, Pier 92, 6 feet depth — NOAA Tides & Currents
Monday, August 24
| Time | Stage | Speed |
|---|---|---|
| 01:03 AM | max ebb | 3.0 mph |
| 05:17 AM | slack | — |
| 06:58 AM | max flood | 0.7 mph |
| 09:14 AM | slack | — |
| 12:51 PM | max ebb | 2.3 mph |
| 03:59 PM | slack | — |
| 07:00 PM | max flood | 2.3 mph |
| 10:12 PM | slack | — |
Tuesday, August 25
| Time | Stage | Speed |
|---|---|---|
| 01:37 AM | max ebb | 3.3 mph |
| 05:41 AM | slack | — |
| 07:41 AM | max flood | 1.1 mph |
| 10:09 AM | slack | — |
| 01:34 PM | max ebb | 2.6 mph |
| 04:40 PM | slack | — |
| 07:41 PM | max flood | 2.4 mph |
| 10:44 PM | slack | — |
Flood runs upriver (north), ebb runs downriver (south). Speeds are the peak for that stage; slack water is the turn between them.
Water temperature
75.0°F – 76.1°F
Over the last 36 hours at The Battery: low of 75.0°F at 5am Sun, high of 76.1°F at 2pm Sun.
Forecast
Tonight: Mostly clear, with a low around 67. West wind around 8 mph.
Monday: Sunny, with a high near 81. Southwest wind 6 to 11 mph.
Recent rainfall
0.96 in
Measured at Central Park over the last 24 hours (11pm Sat - 11pm Sun), wettest hour 7am Sun at 0.49 in.
Rainfall matters here because it drives the sewer overflows behind water quality advisories.
Water quality advisory
Hudson River (Manhattan) is on advisory, lifting about 2am Mon (4 hours from the latest reading).
24 of 45 NYC waterbodies are on advisory right now.
Rainfall at the North River gauge: 1.38 in over 24 hours, 3.93 in over 96 hours. An advisory can outlast the rain that caused it.
Hudson River (Manhattan) is DEC class SB: best usages are primary and secondary contact recreation and fishing.
Reading the currents
The Hudson at Pier 66 is a tidal river, not a lake. Twice a day it floods (north, upriver) and twice it ebbs (south, downriver), and around slack water it briefly does neither. The stronger the current, the harder it is to hold position on the pitch — and the more serious a swim becomes, because a paddler out of their boat drifts with the river while everyone else is trying to reach them.
This is why our summer sessions carry level restrictions. If you are new, check with the session host before signing up, and respect any session marked Advanced/Expert Only. See the schedule for what each session type involves.