Newhaven — Water Temperature, Sea Conditions & Trends

Water Temperature: Daily Trends, Historical Records, and Forecast

⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming.

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 Newhaven rose over the last 30 days but fell over the last week. Currently, the sea water at this location is slightly warmer than average for this day in previous years.

According to our forecast, Water temperature in Newhaven will be 16.4°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

Newhaven sits on the Sussex coast at the mouth of the River Ouse, opening onto the English Channel. Sea temperatures here reflect its exposed coastal position and the changing seasons. Typical winter values are around 6–8°C, rising through spring to roughly 8–13°C. By summer, surface temperatures commonly reach between 14–20°C, with the warmest weeks occasionally touching the upper end of that range during heatwaves. In autumn the water cools back toward 12–16°C. Local conditions can vary with weather, tides and currents, and shallower areas near the shore warm and cool faster than deeper water further out, so swimmers will notice short-term fluctuations from these seasonal averages.