River stage
Mapleton, Siuslaw River
- River level
- 2.88 ft
- Status
- Below flood stage
- 7-day change
- -0.08 ft
- Recent high
- 4.12 ft
- Recent low
- 2.69 ft
Last reported 2026-10-13 | NWS MPLO3
- 30-day change
- -0.39 ft
- Average
- 3.06 ft
- Readings
- 122
- Data span
- 122 days
- Record crest
- 30.21 ft
In brief
The Siuslaw River at Mapleton, OR read 2.88 ft on Oct 13, 2026, 12.12 ft below action stage. That is 0.39 ft lower than 30 days earlier.
Source: National Weather Service gauge MPLO3
Water 51 °F (10 °C) · 6 °F cooler than normal for this date · -5 °F in 24 hours
River level timeline
Stage threshold profile
Highest crests on record
| Rank | Crest | Date |
|---|---|---|
| 1 | 30.21 ft | 1996-02-07 |
| 2 | 28.45 ft | 1972-01-21 |
| 3 | 28.28 ft | 1974-01-16 |
| 4 | 28.07 ft | 2012-01-19 |
| 5 | 28.00 ft | 1964-12-16 |
| 6 | 25.79 ft | 1998-12-28 |
| 7 | 25.73 ft | 1980-12-25 |
| 8 | 23.99 ft | 1977-12-13 |
Flood crests recorded at this gauge by the National Weather Service.
What happens at each level
- 18.00 ft
expect minor flooding of low lying dairy land along with some structures right along the banks of the Siuslaw River in and near Mapleton.
- 19.10 ft
The flow at this level is about 24,600 cfs and has an annual chance of 50 percent (aka 2-year flood).
- 20.00 ft
expect water over East Mapleton Road. Flooding of some low-lying homes and structures begins. Flooding may be exacerbated by high tide.
- 22.00 ft
expect widespread flooding of low-lying land. Several homes and structures in low areas of Mapleton start to flood. Numerous rural roads along and near the Siuslaw River will likely be flooded, and water begins to cover the lower sections of Hwy 126 at this stage. Flooding may be exacerbated during high tide.
- 23.20 ft
the flow at this level is about 35,000 cfs and has a 20 percent chance of happening in a given year (aka 5-year flood).
- 25.00 ft
expect widespread flooding, including several homes and structures in low areas of Mapleton. Many sections of Highway 126 from Tiernan to Mapleton, along with Hwy 36 north of Mapleton begin to flood. Flooding may be exacerbated during high tide.
- 26.00 ft
the flow at this level is 42,000 cfs and has a 10 percent chance of happening in a given year (aka 10-year flood).
- 28.00 ft
expect major flooding along Riverview Avenue area and numerous homes and businesses in Mapleton. Flooding of roads adjacent to the Siuslaw River in the vicinity of Mapleton is likely. Flooding of Highways 126 and 36 will be significant.
- 30.60 ft
the flow at this level is about 56,000 cfs and has a 2 percent chance of happening in a given year (aka 50-year flood).
- 32.50 ft
the flow at this level is about 62,000 cfs and has a 1 percent chance of happening in a given year (aka 100-year flood).
Written by the local National Weather Service forecast office for this exact gauge.
Frequently asked questions
Is the Siuslaw River flooding at Mapleton?
No. The Siuslaw River at Mapleton is at 2.88 ft, 12.12 ft below action stage.
What is the flood stage at Mapleton?
The National Weather Service sets action stage 15 ft, minor flooding 18 ft, moderate flooding 22 ft and major flooding 28 ft.
What is the highest the Siuslaw River has been at Mapleton?
The highest crest on record is 30.21 ft, on 1996-02-07.
Is the Siuslaw River high or low right now at Mapleton?
At 2.88 ft it is higher than 21% of readings over the last 122 days.
How warm is the water at Mapleton, Siuslaw River?
The water temperature at Mapleton, Siuslaw River is 51 °F (10.4 °C), measured 7:00 pm by USGS, which is 6 °F cooler than normal for this date over the past ten years. It has fallen 5.1 °F in the last 24 hours.
Stage and flood information from the NOAA National Weather Service (gauge MPLO3); daily history from the U.S. Geological Survey (site 14307620). Last reading 2026-10-13. For flood safety decisions always follow official National Weather Service warnings.