Porthleven Sea Temperature

(Today) 2025

11.7°C / 53°F

The water will feel cool (fresh). Probably too cold for all but seasoned swimmers. We'd recommend a 4mm or 5mm wetsuit if you want to stay in the water.

*Live data from Perranporth: 12.3°C / 54.1°F

Current weather

15°C / 59°F
(scattered clouds)
Partly cloudy
Wind
15 mph
Humidity
58%

The measurements for the water temperature in Porthleven, England 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 Porthleven water temperature derived from many years of historical sea surface temperature data.

Porthleven average maximum / minimum water temperatures
Maximum and minimum monthly sea temperatures in Porthleven
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 9.2 8.9 8.6 9 10.7 11.9 13.6 15.7 15.1 13.4 12.2 10.7
Max °C 11.6 11.1 10.8 12.3 13.3 16.5 19.7 18.6 18 16.3 14.2 12.7
Min °F 49.5 48.9 48.4 49.5 52.3 55.3 58.9 61.4 60.3 57.2 54.8 52.1
Max °F 51.9 51.1 50.6 52.8 54.9 59.9 65 64.3 63.2 60.1 56.8 54.1

The warmest water temperature is in August with an average around 62.8°F / 17.1°C. The coldest month is March with an average water temperature of 49.5°F / 9.7°C.

7 day tide forecast for Porthleven

ThuFriSatSunMonTueWed
  • Low 02:39am
    (0.78m)
  • High 08:29am
    (5.32m)
  • Low 02:57pm
    (1.03m)
  • High 08:44pm
    (5.35m)
  • Low 03:22am
    (1.08m)
  • High 09:08am
    (5m)
  • Low 03:39pm
    (1.38m)
  • High 09:24pm
    (5.08m)
  • Low 04:08am
    (1.43m)
  • High 09:51am
    (4.65m)
  • Low 04:26pm
    (1.74m)
  • High 10:09pm
    (4.78m)
  • Low 05:01am
    (1.76m)
  • High 10:44am
    (4.34m)
  • Low 05:23pm
    (2.05m)
  • High 11:07pm
    (4.53m)
  • Low 06:06am
    (1.99m)
  • High 11:57am
    (4.16m)
  • Low 06:34pm
    (2.2m)
  • High 12:38am
    (4.42m)
  • Low 07:27am
    (2.01m)
  • High 01:34pm
    (4.2m)
  • Low 07:58pm
    (2.13m)
  • High 01:57am
    (4.5m)
  • Low 08:43am
    (1.83m)
  • High 02:41pm
    (4.4m)
  • Low 09:08pm
    (1.89m)
7 day tide times for Porthleven

*These tide times are estimates based on the nearest accurate location (Newlyn, 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.