Surf Break

Lat Long: 26.85° N 128.29° E

Oku Sea Temperature and Wetsuit Guide

Issued: 2 am 05 Nov 2026 (local time)

Forecast update in  hr  min

Today's Oku sea temperature is
26.6°C
0.8° 

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

Today's Oku sea temperature is 26.6 °C

(Slightly warmer than usual (0.8° above average))

Mean: 25.8 °C
Range: 24.8 °C to 27.4 °C
Statistics for 05 Nov (1981–2005)

    Today, many surfers would wear a shorty .

    Sunny with warm air temperatures at Oku today (feels like 24 °C once we account for wind), and warmer sea temperatures (26 °C). Wear boardshorts or a shorty, or perhaps a thin summer wetsuit to keep the UV off.

    Japan Sea Water Temperature

    Map of current Japan
    Surface Water Temperatures

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

    Map of current Japan
    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 Oku. 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.

    Oku 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.

    Oku sea temperatures peak in the range 28 to 30°C (82 to 86°F) on around the 19th of July and are at their lowest on about the 16th of February, in the range 21 to 23°C (70 to 73°F). Year round warm sea temperatures at Oku climb to their warmest in the third week of July. Even then a rash vest and board shorts should be fine for surfing at any time of year. Oku sea temperatures are lowest in the middle of February. Surfers should use a 2mm long sleeve shorty or a 3/2mm spring wetsuit if the wind is up.

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

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