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Saint Catherine Bay Sea Temperature in January

St Helier, Channel Islands

December Saint Catherine Bay year-round → February

Average sea temperature for Saint Catherine Bay, Channel Islands across January, based on 10 years of daily readings.

Average

10.11° C

High

11.55° C

Low

9.25° C

Water at this temperature is cold and will feel very cold initially, but the body will get used to it and longer swims are possible. Experienced swimmers can manage several hours of swimming, however hypothermia is still a real risk.

January is the 10th warmest of 12 months at Saint Catherine Bay. On average the water sits 3.6° than the year-round mean of 13.74° C.

Compared to December, January is 1.6° cooler than (11.71° C in December). By February the water is usually 9.47° C.

Saint Catherine Bay Day-by-Day Water Temperature in January

10-year low, average and high

8.5° C
9.5° C
10.5° C
11.5° C
12.5° C
1
5
10
15
20
25
31
Day-by-day low and high band with the 10-year daily average through January. Range Average

Each vertical bar above is one day of January. The shaded band covers the range the water has reached on that day across the last 10 years — the lowest reading at the bottom, the highest at the top. The line running through the bars is the daily average over those 10 years, so you can see the typical shape of the month at Saint Catherine Bay.

A narrow band means the temperature on that day has stayed close to the average year on year. A taller band means it has swung more, often because of changeable weather around that time of year. Hovering a day pulls up its low, average, and high.

January Water Temperature Table for Saint Catherine Bay

10-year daily averages

Day Average Low High
January 1 10.93° C 10.4° C 11.46° C
January 2 10.9° C 10.28° C 11.55° C
January 3 10.82° C 10.23° C 11.52° C
January 4 10.72° C 9.81° C 11.52° C
January 5 10.72° C 10.05° C 11.4° C
January 6 10.67° C 10.03° C 11.25° C
January 7 10.6° C 9.95° C 11.31° C
January 8 10.47° C 9.83° C 11.23° C
January 9 10.43° C 9.66° C 11.17° C
January 10 10.33° C 9.65° C 11.09° C
January 11 10.27° C 9.75° C 10.92° C
January 12 10.21° C 9.7° C 10.9° C
January 13 10.18° C 9.56° C 10.99° C
January 14 10.15° C 9.49° C 10.98° C
January 15 10.11° C 9.64° C 10.93° C
January 16 10.13° C 9.66° C 10.97° C
January 17 10.07° C 9.51° C 10.96° C
January 18 9.98° C 9.45° C 10.76° C
January 19 9.94° C 9.42° C 10.52° C
January 20 9.85° C 9.39° C 10.4° C
January 21 9.8° C 9.41° C 10.33° C
January 22 9.73° C 9.4° C 10.24° C
January 23 9.67° C 9.28° C 10.11° C
January 24 9.63° C 9.33° C 10.06° C
January 25 9.62° C 9.44° C 9.84° C
January 26 9.65° C 9.49° C 9.99° C
January 27 9.65° C 9.46° C 10.04° C
January 28 9.56° C 9.35° C 9.71° C
January 29 9.5° C 9.25° C 9.8° C
January 30 9.52° C 9.29° C 9.81° C
January 31 9.52° C 9.35° C 9.83° C

Where January Sits in the Year

January highlighted

7.0° C
10.6° C
14.3° C
17.9° C
21.5° C
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
10.11° C
9.47° C
9.63° C
10.85° C
12.88° C
15.29° C
17.39° C
18.53° C
18.2° C
16.57° C
14.21° C
11.71° C
10-year monthly history for Saint Catherine Bay. Bars span historical low to high; the line marks the monthly average. Range Average
January → February → March → April → May → June → July → August → September → October → November → December →

Nearby Locations in January

Compare other Channel Islands water for the same month

Saint Catherine Bay Location

49.2167, -2.0167

49.21667, -2.01667 View on OpenStreetMap →

Saint Catherine Bay sits at 49.2167°N, 2.0167°W, on the coast of St Helier, Channel Islands. The marker on the map shows the spot the readings on this page come from. It usually sits a short distance from the town centre, out on the open water itself, so the numbers stay tied to the coast rather than a generic point inland.

Coastlines bend, headlands focus the water, and the temperature can run noticeably differently between two beaches that look close together on a map. Comparing nearby locations is a quick way to see how local geography is shaping the readings.

Nearest locations to Saint Catherine Bay