Current Sea Water Temperature:
+47.8°F
| Maximum Sea Water Temperature in December: | 52.0°F |
| Minimum Sea Water Temperature in December: | 40.8°F |
| Average water temperature in December: | 46.3°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| December 13 | 47.8°F | December 08 | 46.8°F |
| December 12 | 48.0°F | December 07 | 46.6°F |
| December 11 | 47.0°F | December 06 | 46.6°F |
| December 10 | 46.6°F | December 05 | 45.0°F |
| December 09 | 46.8°F | December 04 | 47.8°F |
When is the Warmest Sea for London?
According to our data for the last three years for London the highest average sea water temperature was in August, July and September.
Average Water Temperature by Month, °F
Sea Water Temperature in August
The average sea surface temperature in August 2025 for London was 68.6°F. The maximum and minimum values were 66.2°F and 70.6°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2025 for London was 70.0°F. The maximum and minimum values were 68.4°F and 72.4°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for London was 64.3°F. The maximum and minimum values were 60.2°F and 67.6°F respectively.
United Kingdom Resorts:
NAME
F°
| Bath |  |
+38 |
| Belfast |  |
+40 |
| Bournemouth | |
+44 |
| Brighton | |
+46 |
| Bristol | |
+40 |
| Edinburgh | |
+44 |
| Gibraltar |  |
+60 |
| Glasgow |  |
+42 |
| Liverpool | |
+42 |
| London |  |
+36 |
| Middlesbrough | |
+40 |
| Plymouth | |
+46 |
| Scarborough | |
+40 |
| Torquay | |
+38 |
| York | |
+38 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
London
Local time: 09:26
13 dec, saturday
| 1200 |  |
48°F | NE 6 mph |
| 1500 |  |
48°F | NE 6 mph |
| 1800 |  |
46°F | NE 7 mph |
| 2100 | |
44°F | NE 7 mph |
14 dec, sunday
| 0000 |  |
44°F | NE 8 mph |
| 0300 | |
44°F | NE 9 mph |
| 0600 | |
44°F | NE 9 mph |
| 0900 | |
46°F | NE 10 mph |