Waihopai Valley

Waihopai Valley
Interactive map of Waihopai Valley
Coordinates: 41°36′54″S 173°38′49″E / 41.615°S 173.647°E / -41.615; 173.647
CountryNew Zealand
RegionMarlborough
Ward
  • Wairau-Awatere General Ward
  • Marlborough Māori Ward
Electorates
Government
 • Territorial AuthorityMarlborough District Council
 • Marlborough District MayorNadine Taylor[1]
 • Kaikōura MPStuart Smith[2]
 • Te Tai Tonga MPTākuta Ferris[3]
Area
 • Total
921.49 km2 (355.79 sq mi)
Population
 (2023 census)[5]
 • Total
435
 • Density0.472/km2 (1.22/sq mi)

Waihopai Valley is an area near Blenheim in the Marlborough region of the South Island of New Zealand. The Waihopai River drains the area.

The Government Communications Security Bureau operates what it describes as a satellite communications monitoring facility in the Waihopai Valley, which it calls GCSB Waihopai. It has been identified as being a part of ECHELON, the worldwide network of signals interception facilities run by the UKUSA consortium of intelligence agencies.

The lower Waihopai, as it runs into the Wairau Valley, has a number of vineyards.[6] From 1925 to 1927 a small hydroelectric power station was built in the valley.[7] It is now operated by TrustPower.

Demographics

Waihopai Valley covers 921.49 km2 (355.79 sq mi).[4] It is part of the larger Upper Wairau statistical area.[8]

Historical population
YearPop.±% p.a.
2006369—    
2013411+1.55%
2018414+0.15%
2023435+0.99%
Source: [5][9]

Waihopai Valley had a population of 435 in the 2023 New Zealand census, an increase of 21 people (5.1%) since the 2018 census, and an increase of 24 people (5.8%) since the 2013 census. There were 228 males, 204 females, and 3 people of other genders in 162 dwellings.[10] 2.1% of people identified as LGBTIQ+. There were 84 people (19.3%) aged under 15 years, 45 (10.3%) aged 15 to 29, 228 (52.4%) aged 30 to 64, and 78 (17.9%) aged 65 or older.[5]

People could identify as more than one ethnicity. The results were 97.2% European (Pākehā), 5.5% Māori, 0.7% Asian, and 4.1% other, which includes people giving their ethnicity as "New Zealander". English was spoken by 96.6%, Māori by 1.4%, and other languages by 7.6%. No language could be spoken by 2.8% (e.g. too young to talk). The percentage of people born overseas was 13.8, compared with 28.8% nationally.[5]

Religious affiliations were 31.0% Christian, 0.7% Buddhist, 0.7% New Age, and 2.1% other religions. People who answered that they had no religion were 58.6%, and 7.6% of people did not answer the census question.[5]

Of those at least 15 years old, 99 (28.2%) people had a bachelor's or higher degree, 180 (51.3%) had a post-high school certificate or diploma, and 60 (17.1%) people exclusively held high school qualifications. 60 people (17.1%) earned over $100,000 compared to 12.1% nationally. The employment status of those at least 15 was 189 (53.8%) full-time, 75 (21.4%) part-time, and 9 (2.6%) unemployed.[5]

Climate

Climate data for Waihopai Power Station (1971–2000 normals, extremes 1962–1987)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °C (°F) 35.0
(95.0)
38.5
(101.3)
31.7
(89.1)
28.1
(82.6)
22.4
(72.3)
21.4
(70.5)
19.1
(66.4)
20.3
(68.5)
26.5
(79.7)
29.0
(84.2)
29.5
(85.1)
35.0
(95.0)
38.5
(101.3)
Mean maximum °C (°F) 31.5
(88.7)
30.9
(87.6)
27.6
(81.7)
24.0
(75.2)
19.3
(66.7)
16.8
(62.2)
15.4
(59.7)
17.1
(62.8)
20.5
(68.9)
23.4
(74.1)
26.1
(79.0)
28.8
(83.8)
32.6
(90.7)
Mean daily maximum °C (°F) 23.7
(74.7)
23.6
(74.5)
21.1
(70.0)
17.8
(64.0)
14.4
(57.9)
11.5
(52.7)
11.0
(51.8)
12.4
(54.3)
14.7
(58.5)
17.1
(62.8)
19.0
(66.2)
21.5
(70.7)
17.3
(63.2)
Daily mean °C (°F) 17.4
(63.3)
17.3
(63.1)
15.2
(59.4)
12.2
(54.0)
9.2
(48.6)
6.6
(43.9)
6.0
(42.8)
7.1
(44.8)
9.4
(48.9)
11.6
(52.9)
13.5
(56.3)
15.6
(60.1)
11.8
(53.2)
Mean daily minimum °C (°F) 11.2
(52.2)
11.0
(51.8)
9.3
(48.7)
6.7
(44.1)
4.0
(39.2)
1.7
(35.1)
1.0
(33.8)
1.8
(35.2)
4.1
(39.4)
6.2
(43.2)
8.0
(46.4)
9.7
(49.5)
6.2
(43.2)
Mean minimum °C (°F) 5.0
(41.0)
5.3
(41.5)
3.4
(38.1)
1.3
(34.3)
−1.2
(29.8)
−2.7
(27.1)
−4.0
(24.8)
−2.9
(26.8)
−1.2
(29.8)
0.4
(32.7)
2.4
(36.3)
4.1
(39.4)
−4.6
(23.7)
Record low °C (°F) 2.5
(36.5)
1.3
(34.3)
0.3
(32.5)
−2.2
(28.0)
−4.2
(24.4)
−6.0
(21.2)
−8.2
(17.2)
−5.5
(22.1)
−6.7
(19.9)
−2.3
(27.9)
−1.0
(30.2)
−0.2
(31.6)
−8.2
(17.2)
Average rainfall mm (inches) 74.7
(2.94)
45.7
(1.80)
61.7
(2.43)
84.7
(3.33)
65.5
(2.58)
86.8
(3.42)
74.6
(2.94)
79.4
(3.13)
71.6
(2.82)
99.3
(3.91)
57.5
(2.26)
69.9
(2.75)
871.4
(34.31)
Source: NIWA[11]

References

  1. ↑ "2025 Triennial Elections Declaration of Result" (PDF). Electionz. Retrieved 18 October 2025.
  2. ↑ "Kaikōura - Official Result". Electoral Commission. Retrieved 9 May 2026.
  3. ↑ "Te Tai Tonga – Official Result". Electoral Commission. Retrieved 23 February 2026.
  4. 1 2 "Stats NZ Geographic Data Service". Statistical Area 1 2023 (generalised). Retrieved 1 June 2026.
  5. 1 2 3 4 5 6 "Totals by topic for individuals, (RC, TALB, UR, SA3, SA2, Ward, Health), 2013, 2018, and 2023 Censuses". Stats NZ – Tatauranga Aotearoa – Aotearoa Data Explorer. 7023291, 7035335 and 7035336. Retrieved 3 October 2024.
  6. ↑ One example is Spy Valley Archived 2024-12-08 at the Wayback Machine.
  7. ↑ "IPENZ Engineering Heritage - Waihopai Dam". IPENZ. Archived from the original on 9 February 2013. Retrieved 17 January 2013.
  8. ↑ "Geographic Boundary Viewer". Stats NZ. Statistical Area 1 – 2023 and Statistical Area 2 – 2023.
  9. ↑ "Statistical area 1 dataset for 2018 Census". Statistics New Zealand. March 2020. 7023291 and 7023296.
  10. ↑ "Totals by topic for dwellings, (RC, TALB, UR, SA3, SA2, Ward, Health), 2013, 2018, and 2023 Censuses". Stats NZ – Tatauranga Aotearoa – Aotearoa Data Explorer. Retrieved 3 October 2024.
  11. ↑ "CliFlo – National Climate Database : Waihopai Power Stn". NIWA. Archived from the original on 27 November 2015. Retrieved 15 September 2024.