Hurunui › Hurunui Mandamus

Hurunui River at Mandamus (ESNZ)

61.1m³/s

Sat, 17 Oct, 11:00 pm · 30 min ago

Steady

High ClearingClearing: 2.8 d since the last peak, still 1.3× the 30-day median

Good from about Sun 2:15 am · Sun 1:30 am to Sun 3:15 am, below 60 m³/s, from 1 past recession

3 h change: +0.85 m³/s
Steady for: 28 h
7-day peak: 133
Thu, 15 Oct, 5:15 am
30-day median: 45.8
30-day range: 27.8 – 133
Highest gauged: 78.8 m³/s
Stage: 1.43 m
Recession: halves in 2.3 d
median of 1 past rise, toward 27.9

JBNZ: 35 m³/s at Mandamus for the sea to SH7, 40 for SH7 to Mandamus, 100–140 for the gorge above; the upper thresholds are placeholders

Flow

m³/s · New Zealand time

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Recent rises

detected from hourly means

Peak	From	To	Rise	Settled
Thu, 15 Oct, 4:00 am	27.9	132	4.7×	receding
Sun, 27 Sept, 8:00 pm	42.1	59.8	1.4×	3.5 d

Along the Hurunui

Hurunui SH1

JBNZ river guide

Hurunui River, sections that cite this gauge are marked

Sections

Hurunui River

SH70 bridge to the sea

Shingle, willows; fast and mean above SH70 · 16 km · 11.9 m/km

Launch Railway bridge at the mouth

No current information, history not known. Please give information to JBNZ if you boat it.

This row sits under the Hurunui in the sheet, but SH70 does not cross the Hurunui, so it may describe another river.

Sea to SH7 Class 1

Shingle, braided, gorge · 49 km · 4.1 m/km

35 cumecs at Mandamus. Hurunui Mandamus now 61.1 m³/s, above the minimum.

Launch SH1

SH7 to Mandamus Class 2

Boulders, shingle, braided · 20 km · 6 m/km

40 cumecs at Mandamus. Hurunui Mandamus now 61.1 m³/s, above the minimum.

Launch Balmoral bridge, south side, at times into the Waitohi

Mandamus River to Lake Sumner Class 3

Rocks, boulders, gorgy, rapids · 40 km · 6 m/km

100 to 140 cumecs at Mandamus. Hurunui Mandamus now 61.1 m³/s, below the minimum.

Launch The Peaks, ask permission

Requires high flow conditions.

Lake Sumner to No. 3 Hut Class 3

Shingle, braided · 16 km · 7.2 m/km

Launch Loch Katrine

Requires high flow conditions. Seldom boated.

From the Jet Boating New Zealand Canterbury river information sheet of July 2024, transcribed by hand on 17 October 2026. Uplifting is whether the 5-knot limit is lifted for the section. JBNZ can update the sheet at any time; flo checked it 4.9 h ago. Open the PDF.

Weather

at Hurunui Mandamus · Open-Meteo

10pm

Fog

5.9°

–

1 NE

1am

Fog

5.1°

–

3 N

4am

Fog

3.3°

–

6 NW

7am

Fog

2.7°

–

9 NW

10am

Clear

12.5°

–

2 W

1pm

Clear

15.8°

–

8 SE

4pm

Clear

15.9°

–

8 SE

7pm

Clear

13.6°

–

6 E

10pm

Clear

9.4°

–

4 NW

1am

Clear

5.6°

–

13 NW

4am

Fog

5.6°

–

17 NW

7am

Fog

5.5°

–

15 NW

Sat Fog 5.9°/ 5.7° dry

Sun Fog 16.0°/ 2.2° dry

Mon Drizzle 18.2°/ 5.0° 0.1 mm

Tue Fog 19.4°/ 5.7° dry