Sea Temperature

Port Saint John’s Sea Temperature

(Today) Jul 2020

21.9°C / 71.4°F

Current weather

19°C / 66°F
(clear sky)

Partly cloudy

12 mph



The measurements for the water temperature in Port Saint John’s, Eastern Cape are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.

Monthly average max / min water temperatures

The graph below shows the range of monthly Port Saint John’s water temperature derived from many years of historical sea surface temperature data.

Maximum and minimum monthly sea temperatures in Port Saint John’s
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 24.3 24.9 25 23.8 22.6 21.2 20.4 19.2 20.8 21.2 21.9 22.6
Max °C 27.6 27.5 27.8 27.4 25.7 24.3 23.3 22.8 23 23.1 24 25.9
Min °F 77 77.9 78.1 76.3 73.9 71.4 69.8 68 70.3 70.9 72.2 74
Max °F 80.3 80.5 80.9 79.9 77 74.5 72.7 71.6 72.5 72.8 74.3 77.3

7 day tide forecast for Port Saint John’s

  • Low 2:05am
  • High 8:01am
  • Low 2:11pm
  • High 8:50pm
  • Low 3:06am
  • High 9:02am
  • Low 3:10pm
  • High 9:56pm
  • Low 4:23am
  • High 10:24am
  • Low 4:26pm
  • High 11:11pm
  • Low 5:45am
  • High 11:51am
  • Low 5:46pm
  • High 12:18am
  • Low 6:50am
  • High 12:59pm
  • Low 6:53pm
  • High 1:13am
  • Low 7:40am
  • High 1:50pm
  • Low 7:45pm
  • High 1:59am
  • Low 8:22am
  • High 2:32pm
  • Low 8:30pm
7 day tide times for Port Saint John’s

*These tide times are estimates based on the nearest port (East London, South Africa) and may differ by up to half and hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.

Average July sea temperatures

  • Max: 23.3°C / 73.9°F
  • Avg: 21.8°C / 71.2°F
  • Min: 20.4°C / 68.6°F
Port Saint John’s average sea temperature chart

These average ocean temperatures for Port Saint John’s are calculated from several years of archived data.

Map showing location of Port Saint John’s (-31.622910, 29.544770)

Locations nearby


Whilst sea temperatures for Port Saint John’s are as accurate as current data allows, there may be slight local and regional variations depending on conditions. Time of day and wind direction may have a temporary local effect as can water flows from neraby rivers.

Alternate names for Port Saint John’s
Port Saint John's, Port Saint John’s, Umzimvubu

Port Saint John’s average sea temperature chart