Portscatho — Water Temperature, Sea Conditions & Trends

Water Temperature: Daily Trends, Historical Records, and Forecast

⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people.

It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.

Water Temperature Chart Over the Last 30 Days

Water temperature in Portscatho has risen over the last week and month. Currently, the sea water temperature at this location matches the average for this day in previous years.

According to our forecast, Water temperature in Portscatho will be 16.3°C in the next 7 days. See the table below for daily data for the upcoming week.

Table of Daily Sea Temperature Data

Annual Water Temperature Overview by Month

Monthly Water Temp Ranges

30°C

25°C

20°C

15°C

10°c

5°C

0°C

Annual Water Temperature Trend

Portscatho sits on the sheltered east side of Cornwall’s Roseland Peninsula, where the Atlantic influence and a mild Gulf Stream effect give the local sea temperatures a relatively temperate profile for the British coast. Seasonal water temperatures typically range from around 8–10 °C in the coldest winter months to roughly 9–13 °C in spring as the sea slowly warms. Summer months are the warmest, with sea temperatures commonly between 14–18 °C and occasional warm spells pushing waters toward 19–20 °C. In autumn the sea generally cools to about 12–16 °C. Conditions can vary considerably over short distances depending on exposure, tidal state and recent weather, so local bays and sheltered coves will often feel warmer than exposed headlands.