Onekaka Surf Break

Lat Long: 40.75° S 172.71° E

Issued: 5 am 20 Jun 2026 (local time)

Forecast update in  hr  min

Today's Onekaka sea temperature is
14.0° C

Normal for this time of year

Onekaka surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Onekaka sea temperature is 14.0 °C

(Normal for this time of year)

Mean: 14.1 °C
Range: 13.0 °C to 15.6 °C
Statistics for 20 Jun (1981–2005)

    Today, many surfers would wear a spring wetsuit.

    The water temperature (14 °C) at Onekaka is quite cool. If the sun shines as we have forecast, it should feel warm enough to surf in a good spring wetsuit. Effective windchill factor of (15 °C) will make the air and water feel about the same temperature.

    New Zealand Sea Water Temperature

    Map of current New Zealand
    Surface Water Temperatures

    (based on measurements from oceanographic satellites)
    New Zealand Water Temperature Anomaly

    Map of current New Zealand
    Sea Water Temperature Anomalies

    (compared with long term averages
    at this time of year)

    click thumbnails to expand

    Below is a graph of Historical Sea Surface Temperature for Onekaka. This has been derived from analysis of two decades of oceanographic satellite measurements of nearby open water. We have calculated the average water temperature variation around the year as well as the extremes that have been observed on each date.

    Onekaka Water Temperature Graph

    All of the graphs for the surf breaks presented on Surf-Forecast.com are on the same scale to enable comparison between locations around the world.

    Actual sea surface water temperatures close to shore at Onekaka can vary by several degrees compared with these open water averages. This is especially true after heavy rain, close to river mouths or after long periods of strong offshore winds. Offshore winds cause colder deep water to replace surface water that has been warmed by the sun. Air temperature, wind-chill and sunshine should also be considered before deciding on the kind of wetsuit needed to stay warm when surfing at Onekaka. Refer to our detailed weather forecasts for this information.

    Nearest locationNearest