Sea Temperature

Portstewart Sea Temperature

(Today) Aug 2018

13.9°C / 57°F

Current weather

19°C / 67°F
(broken clouds)

Partly cloudy
Wind

15 mph

Humidity

77%

The measurements for the water temperature in Portstewart, N Ireland 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 sea temp

Monthly average max / min water temperatures

The graph below shows the range of monthly Portstewart water temperature derived from many years of historical sea surface temperature data.

Maximum and minimum monthly sea temperatures in Portstewart
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 8 7.6 7.4 7.9 9.3 9.6 12 13.1 13.3 12.3 11.2 9.5
Max °C 10.2 9.2 9.3 10 11.1 13.9 14.9 15.4 15 14.2 13.3 11.7
Min °F 47.3 46.3 46 47 49.5 51 54.7 56.5 56.6 54.9 53 50
Max °F 49.5 47.9 47.9 49.1 51.3 55.3 57.6 58.8 58.3 56.8 55.1 52.2

7 day tide forecast for Portstewart

TueWedThuFriSatSunMon
  • High 05:18am
    (1.59m)
  • Low 10:56am
    (0.90m)
  • High 05:07pm
    (1.71m)
  • Low 11:37pm
    (0.98m)
  • High 06:07am
    (1.61m)
  • Low 11:36am
    (0.86m)
  • High 05:49pm
    (1.80m)
  • Low 12:26am
    (0.95m)
  • High 06:41am
    (1.65m)
  • Low 12:09pm
    (0.79m)
  • High 06:23pm
    (1.90m)
  • Low 12:47am
    (0.90m)
  • High 07:05am
    (1.69m)
  • Low 12:39pm
    (0.72m)
  • High 06:53pm
    (1.99m)
  • Low 01:11am
    (0.84m)
  • High 07:25am
    (1.74m)
  • Low 01:07pm
    (0.64m)
  • High 07:21pm
    (2.07m)
  • Low 01:34am
    (0.77m)
  • High 07:46am
    (1.80m)
  • Low 01:34pm
    (0.56m)
  • High 07:49pm
    (2.13m)
  • Low 01:59am
    (0.70m)
  • High 08:08am
    (1.85m)
  • Low 02:01pm
    (0.51m)
  • High 08:18pm
    (2.17m)

*These tide times are estimates based on the nearest port (Portrush, Northern Ireland) 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 August sea temperatures

  • Max: 15.4°C / 59.6°F
  • Avg: 14.2°C / 57.6°F
  • Min: 13.1°C / 55.5°F
Portstewart average sea temperature chart

These average ocean temperatures for Portstewart are calculated from several years of archived data.

Map showing location of Portstewart (55.181320, -6.714020)

Locations nearby

Variations

Whilst sea temperatures for Portstewart 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 Portstewart

Portstewart average sea temperature chart