How high is the Siuslaw River Near Mapleton, OR right now?

The Siuslaw River Near Mapleton, OR is currently flowing at 358 cubic feet per second with a gage height of 3.68 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Siuslaw River Near Mapleton, OR normal for this time of year?

Current flow is classified as normal for October 28. Today's discharge is at the 50th percentile compared to the long-term historical record at this gauge.

Is the Siuslaw River Near Mapleton, OR at flood stage?

No — the gage height is 14.32 feet below the NWS flood-stage threshold of 18.0 feet.

What is the historical median flow for the Siuslaw River Near Mapleton, OR on October 28?

The long-term median discharge for this date is 356 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 131 to 2,640 cfs.

Where is the Siuslaw River Near Mapleton, OR stream gauge located?

The Siuslaw River Near Mapleton, OR stream gauge is operated by the USGS in Lane County, OR on the Siuslaw River. USGS site number 14307620 (coordinates 44.0623, -123.8832).

Siuslaw River Near Mapleton, OR

USGS Site No: 14307620 • Siuslaw River • Lane County, OR

Siuslaw River Near Mapleton, OR on the Siuslaw River is currently at 358 cfs (Normal — 50th percentile for this date) . Gage height: 3.68 ft.

Reading from 4 months ago

↑ Upstream on Siuslaw River

Siuslaw River Near Alma, OR

358

CFS Discharge

3.68

Gage Height (ft)

Normal

Flow Condition

Normal

Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for October 28 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.

Percentile	Label	CFS Threshold	Today's Flow
10th	Very Low threshold	131
25th	Low threshold	168
50th (Median)	Normal (median)	356
75th	High threshold	853	Today: 358 cfs
95th	Very High threshold	2,640

30-Day Hydrograph

Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.

10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date	Discharge (CFS)	Gage Ht (ft)
May 28, 2026	374	—
May 27, 2026	399	—
May 26, 2026	414	—
May 25, 2026	377	—
May 24, 2026	379	—
May 23, 2026	390	—
May 22, 2026	404	—
May 21, 2026	419	—
May 20, 2026	433	—
May 19, 2026	450	—
May 18, 2026	473	—
May 17, 2026	502	—
May 16, 2026	514	—
May 15, 2026	490	—
Apr 20, 2026	1,400	—
Apr 19, 2026	1,560	—
Apr 18, 2026	1,800	—
Apr 17, 2026	2,110	—
Apr 16, 2026	2,560	—
Apr 15, 2026	2,140	—
Apr 14, 2026	1,030	—
Apr 13, 2026	1,060	—
Apr 12, 2026	1,080	—
Apr 11, 2026	980	—
Apr 10, 2026	975	—
Apr 9, 2026	1,020	—
Apr 8, 2026	1,080	—
Apr 7, 2026	1,170	—
Apr 6, 2026	1,290	—
Apr 5, 2026	1,450	—

Station Information

USGS Site No: 14307620
State: OR
County: Lane County
Coordinates: 44.0623, -123.8832
Drainage Area: 588 mi²
Datum (ft): 41.0
HUC Code: 17100206

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 15.0 ft
Flood Stage: 18.0 ft
Moderate Flood: 22.0 ft
Major Flood: 28.0 ft

Currently 14.32 ft below flood stage.

Recent Extremes

Max discharge: 22,800 cfs

Dec 19, 2025
Min discharge: 51 cfs

Sep 28, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

Lake Creek at Swisshome, OR
4.4 mi · 181 cfs

Unknown
Siuslaw River Near Alma, OR
16.7 mi · 58 cfs

Unknown
East Fork Lobster Creek Near Alsea, Or.
17.7 mi · 3 cfs

Normal
Alsea River Near Tidewater, OR
22.5 mi · 275 cfs

Normal
Long Tom River Near Noti, OR
22.7 mi · 42 cfs

Normal