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Oiso Jetty water temperature
Oiso Jetty ratings
Quality on a good day: 3.0
Consistency of Surf: 3.7
Difficulty Level: 2.7
Wind and Kite Surfing: 1.0
Crowds: 2.0

Overall: 3.0

See all 18 ratings

Based on 3 votes. Vote


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Oiso Jetty Water Temperature and Wetsuit Guide

(Kanagawa, Japan)

Today's Oiso Jetty sea temperature is 18.2 °C.

Statistics for 22 May (1981–2005) – mean: 21.1 °C, range: 19.1 °C to 23.9 °C

Sunny with pleasantly warm air temperatures (feeling like 23 °C once we account for wind), yet at 18 °C the sea remains several degrees colder than the air at Oiso Jetty. The majority of surfers will need a spring wetsuit though a summer suit or even a shorty may suffice for a short session.

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 Oiso Jetty. 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.

Oiso Jetty 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.

Oiso Jetty sea water temperatures peak in the range 26 to 28°C (79 to 82°F) on around the 14th of August and are at their coldest on about the 1st of March, in the range 15 to 17°C (59 to 63°F). Year round warm sea water temperatures at Oiso Jetty climb to their maximum in mid August. Even then a rash vest and board shorts should be fine for surfing at any time of year. The coldest seasonal sea water temperatures at Oiso Jetty at the beginning of March 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 Oiso Jetty 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 Oiso Jetty. Refer to our detailed weather forecasts for this information.