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Coldest sea in New Zealand in October

245 coastal locations in New Zealand ranked by typical October sea temperature, coldest first. Region-wide average in October: 14.5°C.

Coldest in October

Campbell Island/Motu Ihupuku - Perseverance Harbour

7.4°C October mean in New Zealand

Regional October average

14.5°C

across all 245 coastal locations in New Zealand

Vs annual mean

-1.8°C

below the year-round regional average

What the New Zealand sea feels like in October

Water at this temperature is cold and will feel very cold initially, but the body will get used to it and longer swims are possible. Experienced swimmers can manage several hours of swimming, however hypothermia is still a real risk.

New Zealand monthly average 13.6°C to 19.3°C
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  • Warmest month February 19.3°C
  • Coldest month August 13.6°C
  • Annual mean 16.3°C
  • Months above 20°C 0 of 12

Where October fits in the year

October sits inside the regional pattern shown on the left. Pick a different month to see how the ranking shifts.

All twelve New Zealand month rankings:

New Zealand sea temperature map (live)

The map shows today's latest reading at every New Zealand location. The list below is based on the typical October mean.

Zoom in to see individual locations. Click a pin for water temperatures. View list →
°C -2 0 1 3 5 7 9 11 13 15 17 19 21 24 27 30 35

Top 50 coldest New Zealand locations in October

Sorted by typical October mean from a decade of daily readings, coldest first. Click any place for the full location page.

# Location October mean
1 Campbell Island/Motu Ihupuku - Perseverance Harbour New Zealand Outlying Islands 7.4°C
2 Auckland Island - Carnley Harbour Auckland 8.5°C
3 Kaka Point 10.9°C
4 Dunedin 10.9°C
5 Portobello 10.9°C
6 Snares Islands/Tini Heke - North East Island New Zealand Outlying Islands 11.0°C
7 Green Island Otago 11.2°C
8 Port Chalmers Otago 11.3°C
9 Spit Wharf Otago 11.3°C
10 Nugget Point Otago 11.4°C
11 Stewart Island 11.6°C
12 Ruapuke Island Southland 11.6°C
13 Port Adventure Southland 11.6°C
14 Waikawa Harbour Southland 11.6°C
15 Waipapa Point Southland 11.7°C
16 Bluff Southland 11.7°C
17 Dog Island Southland 11.7°C
18 Oban Southland 11.7°C
19 Oamaru Otago 11.8°C
20 Invercargill 11.8°C
21 New River Entrance Southland 11.8°C
22 Owenga Chatham Islands Territory 11.9°C
23 Riverton/Aparima Southland 11.9°C
24 Riverton 11.9°C
25 Solander Island (Hautere) Southland 11.9°C
Show 25 more ▸
26 Easy Harbour Southland 11.9°C
27 Small Craft Retreat Southland 11.9°C
28 Waitangi Chatham Islands Territory 12.0°C
29 Kaingaroa Chatham Islands Territory 12.0°C
30 Yankee River Southland 12.0°C
31 Kawakaputa Bay Southland 12.0°C
32 Ernest Islands Southland 12.1°C
33 French Bay Canterbury 12.1°C
34 Tikao Bay Canterbury 12.1°C
35 Pahia 12.1°C
36 Timaru 12.1°C
37 Christchurch 12.2°C
38 Lyttelton 12.2°C
39 Akaroa 12.2°C
40 Sumner 12.2°C
41 Kaikoura 12.3°C
42 Port Craig Southland 12.3°C
43 Chalky Island - Sealers Bay Southland 12.3°C
44 Coal Island - Fishing Bay Southland 12.3°C
45 Jane Coves Southland 12.3°C
46 Welcombe Bay Southland 12.3°C
47 Cape Campbell Marlborough 12.7°C
48 Front Islands Southland 12.8°C
49 Gilbert Islands Southland 12.8°C
50 Many Islands Southland 12.8°C

Warmest 10 in New Zealand in October

Same data the other way. The warmest spots for the same month.

# Location October mean
1 Fishing Rock Sugar Loaf Islands 19.7°C
2 Whangamumu Harbour Northland 16.9°C
3 Bay of Islands 16.9°C
4 Waiiti Bay Northland 16.9°C
5 Coopers Beach 16.9°C
6 Kerikeri 16.8°C
7 North Cape (Otou) Northland 16.8°C
8 Whangaroa Northland 16.8°C
9 Doves Bay Northland 16.8°C
10 Opua Northland 16.8°C

More on this region