Penarth Sea Temperature

(Today) 2025

17.3°C / 63.1°F

The water will feel medium. The water will feel a bit chilly in just bathers / swimming costume. If you plan on wearing a wetsuit 4/3mm should be thick enough.

*Live data from Weston Bay: 20.5°C / 68.9°F

Current weather

16°C / 61°F
(light rain)
Partly cloudy
Wind
15 mph
Humidity
89%

The measurements for the water temperature in Penarth, Wales 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.

*Live data may vary from satellite readings for a number of reasons. These include local factors, depth of smapling and time of day.

Water temp by month

Monthly average max / min water temperatures

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

Penarth average maximum / minimum water temperatures
Maximum and minimum monthly sea temperatures in Penarth
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 7.2 7.3 7.4 8.2 10.2 11.9 14 16 15.6 14.2 12.3 9.5
Max °C 10.4 9.8 9.3 11 12.5 15.3 17.6 17.5 17.4 16.3 14.8 12.7
Min °F 46.2 46.1 46 47.9 51.2 54.8 58.6 61.4 60.8 58.4 55.1 50.4
Max °F 49.4 48.6 47.9 50.7 53.5 58.2 62.2 62.9 62.6 60.5 57.6 53.6

The warmest water temperature is in August with an average around 62.1°F / 16.7°C. The coldest month is March with an average water temperature of 46.9°F / 8.3°C.

7 day tide forecast for Penarth

TueWedThuFriSatSunMon
  • Low 04:49am
    (1.78m)
  • High 10:47am
    (11.49m)
  • Low 05:05pm
    (2.03m)
  • High 11:09pm
    (11.61m)
  • Low 05:27am
    (1.91m)
  • High 11:30am
    (11.22m)
  • Low 05:43pm
    (2.21m)
  • High 11:53pm
    (11.23m)
  • Low 06:05am
    (2.22m)
  • High 12:14pm
    (10.83m)
  • Low 06:23pm
    (2.55m)
  • High 12:38am
    (10.77m)
  • Low 06:49am
    (2.64m)
  • High 01:01pm
    (10.42m)
  • Low 07:08pm
    (2.98m)
  • High 01:30am
    (10.32m)
  • Low 07:35am
    (3.1m)
  • High 01:57pm
    (10.04m)
  • Low 08:02pm
    (3.39m)
  • High 02:33am
    (9.93m)
  • Low 08:42am
    (3.44m)
  • High 03:08pm
    (9.82m)
  • Low 09:20pm
    (3.58m)
  • High 03:53am
    (9.83m)
  • Low 10:04am
    (3.47m)
  • High 04:31pm
    (9.98m)
  • Low 10:46pm
    (3.38m)
7 day tide times for Penarth

*These tide times are estimates based on the nearest accurate location (Hinkley Point, England) and may differ by up to half an hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.