Thames — Water Temperature in April

Water Temperature Range

17°C

minimum

19°C

average

22°C

maximum

Get instant access to real-time water temperatures for this and all other locations with our iOS and Android apps.

Water Temperature Chart for Month

The chart shows the average daily water temperature for each day of the month based on historical data.

Table of Water Temperatures by Day of the Month for Previous Years

Day	2026	2025	2024	2023
APR 1	-10°C	21°C	21°C	21°C
APR 2	21°C	20°C	21°C	21°C
APR 3	21°C	20°C	20°C	21°C
APR 4	21°C	20°C	20°C	20°C
APR 5	21°C	19°C	20°C	19°C
APR 6	21°C	19°C	20°C	20°C
APR 7	20°C	20°C	20°C	20°C
APR 8	20°C	20°C	20°C	21°C
APR 9	20°C	20°C	20°C	19°C
APR 10	20°C	20°C	20°C	20°C
APR 11	20°C	20°C	21°C	20°C
APR 12	20°C	20°C	20°C	20°C
APR 13	20°C	20°C	20°C	21°C
APR 14	20°C	19°C	20°C	21°C
APR 15	20°C	20°C	19°C	21°C
APR 16	20°C	20°C	19°C	21°C
APR 17	20°C	19°C	19°C	20°C
APR 18	19°C	19°C	19°C	20°C
APR 19	19°C	19°C	18°C	19°C
APR 20	19°C	19°C	19°C	20°C
APR 21	19°C	19°C	18°C	20°C
APR 22	19°C	18°C	18°C	20°C
APR 23	19°C	20°C	20°C	20°C
APR 24	19°C	19°C	20°C	19°C
APR 25	18°C	19°C	20°C	19°C
APR 26	19°C	19°C	20°C	20°C
APR 27	18°C	19°C	19°C	20°C
APR 28	18°C	19°C	19°C	19°C
APR 29	18°C	19°C	18°C	19°C
APR 30	18°C	19°C	18°C	19°C

April: Climate and Swimming Opportunities

Average Night Air Temperature

11°C

Average Day Air Temperature

19°C

Precipitation Amount per Month

127 mm

Number of Rainy Days

Daylight per Day

11 hrs

Sunshine per Day

5 hrs

Average Wind Speed

15 km/h

Average Humidity

84%

At such water and air temperatures, swimming often feels chilly and is best for short swims. Getting out can feel cold, so it helps to have dry clothes ready right away.