Harwich — Water Temperature in October

Water Temperature Range

9°C

minimum

16°C

average

20°C

maximum

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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	2025	2024	2023	2022
OCT 1	19°C	19°C	19°C	19°C
OCT 2	18°C	19°C	18°C	18°C
OCT 3	18°C	19°C	20°C	18°C
OCT 4	18°C	17°C	19°C	18°C
OCT 5	18°C	17°C	19°C	18°C
OCT 6	18°C	17°C	18°C	18°C
OCT 7	18°C	17°C	18°C	18°C
OCT 8	17°C	17°C	18°C	17°C
OCT 9	18°C	18°C	18°C	17°C
OCT 10	18°C	18°C	18°C	17°C
OCT 11	17°C	17°C	18°C	17°C
OCT 12	17°C	17°C	18°C	17°C
OCT 13	17°C	16°C	19°C	16°C
OCT 14	17°C	15°C	18°C	17°C
OCT 15	17°C	15°C	19°C	16°C
OCT 16	16°C	15°C	18°C	16°C
OCT 17	17°C	15°C	18°C	16°C
OCT 18	16°C	14°C	18°C	15°C
OCT 19	15°C	13°C	16°C	16°C
OCT 20	16°C	14°C	16°C	16°C
OCT 21	16°C	13°C	17°C	16°C
OCT 22	16°C	13°C	17°C	16°C
OCT 23	16°C	14°C	17°C	16°C
OCT 24	16°C	14°C	16°C	16°C
OCT 25	16°C	14°C	16°C	16°C
OCT 26	16°C	14°C	17°C	16°C
OCT 27	15°C	14°C	16°C	15°C
OCT 28	15°C	14°C	15°C	15°C
OCT 29	15°C	14°C	14°C	15°C
OCT 30	15°C	13°C	14°C	15°C
OCT 31	14°C	12°C	14°C	14°C

October: Climate and Swimming Opportunities

Average Night Air Temperature

9°C

Average Day Air Temperature

17°C

Precipitation Amount per Month

93 mm

Number of Rainy Days

Daylight per Day

11 hrs

Sunshine per Day

7 hrs

Average Wind Speed

21 km/h

Average Humidity

73%

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.