St Helens average May sea temperature

Max: 17.9°C / 64.2°F

Avg: 15.9°C / 60.6°F

Min: 14.4°C / 57.9°F

These figures are calculated from several years of recorded data and are the maximum, minimum and average temperatures of all the recorded years

Average daily May sea temperatures


Monthly St Helens water temperature chart

The bar chart below shows the average monthly sea temperatures at St Helens over the year.

  • Jan
    17.6°C
    63.6°F
  • Feb
    18.1°C
    64.6°F
  • Mar
    18°C
    64.4°F
  • Apr
    17.3°C
    63.2°F
  • May
    15.9°C
    60.6°F
  • Jun
    14.7°C
    58.5°F
  • Jul
    13.4°C
    56.1°F
  • Aug
    13.1°C
    55.5°F
  • Sep
    13.1°C
    55.6°F
  • Oct
    13.8°C
    56.8°F
  • Nov
    15.4°C
    59.7°F
  • Dec
    16.9°C
    62.5°F