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Around here
Around OnBoat
- Sepulveda DamRecreation area13.4 mi (opens in a new tab)
- Griffith Park Visitor CenterVisitor center13.9 mi (opens in a new tab)
- Santa Monica Mountains Anthony C. Beilenson Interagency Visitor CenterVisitor center17.6 mi (opens in a new tab)
- Santa Monica Mountains Anthony C. Beilenson Interagency Visitor CenterVisitor center17.6 mi (opens in a new tab)
- Hansen DamRecreation area19.4 mi (opens in a new tab)
- Santa Monica Mountains National Recreation AreaRecreation area20.7 mi (opens in a new tab)
Data Source: Recreation.gov · Source: USGS GNIS · Public land: USGS PAD-US
Typical flow by month
1943 to 2026
The water at OnBoat typically runs highest in January, at a median 42 cfs, and lowest in November, at 12 cfs. The highest flow on record for any single day is 11,300 cfs, in 2024.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 42 | 8.1 to 77 |
| February | 38 | 8.0 to 83 |
| March | 36 | 8.2 to 83 |
| April | 23 | 8.4 to 64 |
| May | 14 | 8.3 to 54 |
| June | 13 | 7.7 to 51 |
| July | 20 | 8.1 to 46 |
| August | 24 | 7.8 to 48 |
| September | 20 | 6.6 to 52 |
| October | 17 | 6.0 to 52 |
| November | 12 | 5.8 to 57 |
| December | 29 | 6.2 to 63 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 61 years of record. Statistics published by the US Geological Survey for Los Angeles R at Sepulveda Dam CA (site 11092450). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Current conditions
Today · Sat
84Go/ 100
ClearWaves 2.6 ft83°FRain 0%Wind 12 kt, gusts 12
Waves
2.6 ft @ 9s
Wind
2 kt
Gusts 12 kt
Water
72°F
Air
59°F
Streamflow
46 cfs
Normal (69th)
Water level
0.69 ft
Air quality
30 Good
Los Angeles - N. Main Street monitor, 22 km
National Weather Service
NWS issues forecasts here only during high water.
Tides
Falling
Low -0.2 ft at 2:16 PM
Predicted at Santa Monica, Municipal Pier, 7 km away.
Get a 2027 tide calendar for this stationForecast from Open-Meteo global models (NOAA & ECMWF). Flood stages and forecasts: NOAA National Weather Service. Air quality: South Coast AQMD via EPA AirNow. Preliminary data, not verified. Tide predictions: NOAA CO-OPS, feet above mean lower low water. See full conditions →
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