Where is the sea coldest in New Zealand in September?

Tahunanui Beach in New Zealand has the coldest sea in New Zealand in September, averaging about 10.0 °C. Kaiteriteri Beach (10.0 °C) and Marahau Beach are the next coolest.

How many beaches in New Zealand are warm enough to swim in September?

None of the top 25 ranked beaches in New Zealand reach 22 °C in September, so a wetsuit is recommended for anything longer than a quick dip.

How are these September sea temperatures calculated?

Each figure is a long-term monthly average sea surface temperature for that location, so it reflects a typical September rather than today's reading. Open a beach page for the live water temperature and 7-day forecast.

Seasonal ranking

Coldest sea temperature in New Zealand in September

Where the sea is coolest across New Zealand during September, ranked by long-term monthly average water temperature. Tahunanui Beach (South Island, New Zealand) is the coolest at around 10°C. Open any spot for today's live water temperature and a 7-day swim forecast.

1
Tahunanui Beach
South Island · New Zealand · Tasman Sea
Cold — wetsuit strongly recommended
10°C
September average
2
Kaiteriteri Beach
South Island · New Zealand · Tasman Sea
Cold — wetsuit strongly recommended
10°C
September average
3
Marahau Beach
South Island · New Zealand · Tasman Sea
Cold — wetsuit strongly recommended
10°C
September average
4
Totaranui Beach
South Island · New Zealand · Tasman Sea
Cold — wetsuit strongly recommended
10°C
September average
5
Wharariki Beach
South Island · New Zealand · Tasman Sea
Cold — wetsuit strongly recommended
10°C
September average
6
Sumner Beach
South Island · New Zealand · Tasman Sea
Cold — wetsuit strongly recommended
10°C
September average
7
Caroline Bay
South Island · New Zealand · Tasman Sea
Cold — wetsuit strongly recommended
10°C
September average
8
Birdlings Flat
South Island · New Zealand · Tasman Sea
Cold — wetsuit strongly recommended
10°C
September average
9
Akaroa Beach
South Island · New Zealand · Tasman Sea
Cold — wetsuit strongly recommended
10°C
September average
10
Kaka Point
South Island · New Zealand · Tasman Sea
Cold — wetsuit strongly recommended
10°C
September average
11
Curio Bay
South Island · New Zealand · Tasman Sea
Cold — wetsuit strongly recommended
10°C
September average
12
Brighton Beach Dunedin
South Island · New Zealand · Tasman Sea
Cold — wetsuit strongly recommended
10°C
September average
13
Oreti Beach
South Island · New Zealand · Tasman Sea
Cold — wetsuit strongly recommended
10°C
September average
14
Riverton Beach
South Island · New Zealand · Tasman Sea
Cold — wetsuit strongly recommended
10°C
September average
15
Kaikoura South Bay
South Island · New Zealand · Tasman Sea
Cold — wetsuit strongly recommended
10°C
September average
16
Westport North Beach
South Island · New Zealand · Tasman Sea
Cold — wetsuit strongly recommended
10°C
September average
17
Hokitika Beach
South Island · New Zealand · Tasman Sea
Cold — wetsuit strongly recommended
10°C
September average
18
Greymouth Beach
South Island · New Zealand · Tasman Sea
Cold — wetsuit strongly recommended
10°C
September average
19
Kohimarama Beach
Auckland · New Zealand · Pacific Ocean
Cold — wetsuit strongly recommended
13°C
September average
20
Red Beach
Auckland · New Zealand · Pacific Ocean
Cold — wetsuit strongly recommended
13°C
September average
21
Waiheke Onetangi
Auckland · New Zealand · Pacific Ocean
Cold — wetsuit strongly recommended
13°C
September average
22
Cooks Beach
Coromandel · New Zealand · Pacific Ocean
Cold — wetsuit strongly recommended
13°C
September average
23
Onemana Beach
Coromandel · New Zealand · Pacific Ocean
Cold — wetsuit strongly recommended
13°C
September average
24
Opoutere Beach
Coromandel · New Zealand · Pacific Ocean
Cold — wetsuit strongly recommended
13°C
September average
25
Pauanui Beach
Coromandel · New Zealand · Pacific Ocean
Cold — wetsuit strongly recommended
13°C
September average

Coldest sea in September elsewhere

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New Zealand in September — frequently asked questions

Where is the sea coldest in New Zealand in September?: Tahunanui Beach in New Zealand has the coldest sea in New Zealand in September, averaging about 10.0 °C. Kaiteriteri Beach (10.0 °C) and Marahau Beach are the next coolest.
How many beaches in New Zealand are warm enough to swim in September?: None of the top 25 ranked beaches in New Zealand reach 22 °C in September, so a wetsuit is recommended for anything longer than a quick dip.
How are these September sea temperatures calculated?: Each figure is a long-term monthly average sea surface temperature for that location, so it reflects a typical September rather than today's reading. Open a beach page for the live water temperature and 7-day forecast.

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