Today's Valnäs - Nord Koster sea temperature is 17.5 °C
(Normal for this time of year (within 0.1° of average))
| Mean: | 17.6 °C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Range: | 14.7 °C to 20.4 °C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statistics for 05 Aug (1981–2005) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Today, many surfers would wear a summer wetsuit.
The Valnäs - Nord Koster water temperature is reasonably warm (17 °C) and the air temperature will similar (windchill forecast 16 °C). A good quality summer wetsuit would be ideal.
 Map of current Sweden Surface Water Temperatures (based on measurements from oceanographic satellites) |  Map of current Sweden 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 Valnäs - Nord Koster. 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.
Actual sea surface water temperatures close to shore at Valnäs - Nord Koster 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 Valnäs - Nord Koster. Refer to our detailed weather forecasts for this information.
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