Treachery Head Surf Break
Lat Long: 32.45° S 152.53° E

Treachery Head Sea Temperature and Wetsuit Guide

Weather Forecast for Treachery Head

Issued: 3 pm 09 Jun 2026 (local time)

Forecast update in  hr  min

Today's Treachery Head sea temperature is
21.1° C

Slightly warmer than usual

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

Today's Treachery Head sea temperature is 21.1 °C

(Slightly warmer than usual)

Mean: 20.2 °C
Range: 19.0 °C to 22.4 °C
Statistics for 09 Jun (1981–2005)

    Today, many surfers would wear a shorty .

    Sunny with pleasantly warm air temperatures (feeling like 20 °C once we account for wind), and similar sea temperatures (21 °C). Wear boardshorts or a shorty, or better still a thin summer wetsuit to keep the UV off.

    Australia Sea Water Temperature

    Map of current Australia
    Surface Water Temperatures

    (based on measurements from oceanographic satellites)
    Australia Water Temperature Anomaly

    Map of current Australia
    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 Treachery Head. 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.

    Treachery Head 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.

    Treachery Head sea temperatures peak in the range 23 to 26°C (73 to 79°F) on around the 6th of February and are at their coldest on about the 16th of August, in the range 17 to 20°C (63 to 68°F). Treachery Head sea temperatures are always warm reach their warmest in the first week of February. You'll need a 2mm neoprene top or a shorty at dawn/dusk or if it's windy. The coldest Treachery Head sea temperatures in the middle of August require something like a 3/2mm fully sealed wetsuit.

    Actual sea surface water temperatures close to shore at Treachery Head 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 Treachery Head. Refer to our detailed weather forecasts for this information.

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