Onetangi

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At 1.87 km long beach, Onetangi Beach is Waiheke's largest sandy beach. For over 100 years the beach has hosted the Onetangi Beach Races, turning the beach into a horse racing course. Annual sandcastle building competitions, The Big Dig (a mass treasure hunt), and many other fun activities utilize this beautiful land along with the average swimmer. The western end is clothing optional, making it perfect for balancing out tan lines. The beach has ample parking and is public transit accessible.

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COVID-19

Keep your distance from other people.

Practicing social distancing is still essential. Only go to the beach if you are able to keep 6 feet or 2 meters away from others. Follow the instructions provided by your local health authorities. If your community has asked that you remain indoors and away from others, do so. Spending a day in any crowded place is the worst thing we can do for our most vulnerable right now and will counter our efforts to curb the virus’s spread.

Water Quality

Meets water quality standards
Current Status
This status is based on the latest sample, taken on February 6th, 2023. The Swim Guide - New Zealand updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on February 6th, 2023 at 5:00 PM.

For water quality icon legend, click:

Report Pollution

Monitoring Frequency

Source Information

Beaches in Auckland are monitored by Safeswim, a program which emerged out of a partnership between Auckland Council, Surf Life Saving Northern Region, and Auckland Regional Public Health Service. Safeswim forecasts water quality and real-time public health alerts and safety risks at 84 beaches and 8 freshwater locations around Auckland.

Safeswim uses predictive modelling to provide the public with real-time water quality and safety information. Predictive modelling allows Safeswim to forecast recreational water quality so that bathers and other recreational water users have better access to the current and future status of their beaches. This allows recreational water users to make better, more informed decisions about when and where to get in the water. Water quality predictions are made using statistical modelling. Models include historical and current water quality test results, as well as other environmental factors such as wind, rain, tides, and sewage events like CSOs. Safeswim’s models are updated every 10 minutes, and display results using 3 risk categories:

People are exposed to very low risk of infection from contact with the water. The beach’s water quality doesn’t present an immediate health risk to those in direct contact with it.

People are exposed to a low to moderate risk of infection from contact with the water. This is the minimum acceptable state. The beach’s water quality still meets an acceptable standard for swimming.

People are exposed to a moderate to high risk of infection from contact with the water. The beach’s water quality is considered unsuitable for swimming.

Swim Guide interprets these categories in our pass/fail system as:

Very low risk and low to moderate risk categories receive a GREEN/PASS in Swim Guide.

Moderate to high risk categories receive a RED/FAIL in Swim Guide.

The predictive models use New Zealand’s Ministry of Health and Ministry of the Environment’s Microbiological Water Quality Guidelines for Recreational Water. The Guidelines are:

Marine water : Single sample value > 140 Enterococcus / 100 ml
Freshwater : Single sample value > 260 E.coli / 100 ml

Water Quality Graph