Today's Uchizuma sea temperature is 24.1 °C
(Slightly cooler than normal)
| Mean: | 24.9 °C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Range: | 23.4 °C to 26.8 °C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statistics for 30 Jun (1981–2005) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Today, many surfers would wear a rashvest wetsuit.
Sunny with very warm air temperatures, feeling like 26 °C once we account for any wind. Sea temperatures (24 °C) warm too. Staying warm in the water won't be a problem in board-shorts, but wear at least a rash-vest to keep the UV off.
 Map of current Japan Surface Water Temperatures (based on measurements from oceanographic satellites) |  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 Uchizuma. 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.
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.
Uchizuma sea temperatures peak in the range 26 to 29°C (79 to 84°F) on around the 4th of August and are at their minimum on about the 23rd of February, in the range 16 to 19°C (61 to 66°F). Year round warm sea temperatures at Uchizuma climb to their highest in early August. Even then a rash vest and board shorts should be fine for surfing at any time of year. The minimum seasonal sea temperatures at Uchizuma in the fourth week of February lend themselves to a 4/3mm wetsuit or a 3/2mm suit and 3mm neoprene boots.
Actual sea surface water temperatures close to shore at Uchizuma 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 Uchizuma. Refer to our detailed weather forecasts for this information.
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