Is Outer Hebrides too cold to swim in autumn? In September sea water temperature throughout Outer Hebrides is not yet warm enough for swimming and does not exceed 20°C. Based on average water temperature observations over the past ten years, the warmest sea in Outer Hebrides in September was 13.8°C (in Tarbert), and the coldest water 13.1°C (in Stornoway). To find out the sea temperature today and in the coming days, go to Current sea temperature in Outer Hebrides
Outer Hebrides cities and resorts with the values of the average water temperature in September in recent years.
For more detailed information about water temperature, surf forecast, weather and time of sunrise and sunset in any specific area of your interest, just click on a city name. For ease of search, all places are also grouped by the first letter of the name.
To find out what the water temperature was in Outer Hebrides any day over a period of the last ten years, select the month