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Plymouth in January

Find out everything about the water temperature in Plymouth in January. Average, minimum and maximum recorded temperatures as well as daily temperature in January for the last two years. Compare the current month's sea temperature data with other months of the year.
Water temperature in January
Minimum:

48.6 °F

Average:

50.6 °F

Maximum:

53.0 °F

Sea water temperature in Plymouth in January

In the city of Plymouth, the month of January is too cold for swimming. The minimum recorded temperature during this month was 48.6°F on January 31, 2020, with an average temperature being 50.6°F and a maximum temperature reaching 53.0°F on January 1, 2016.

Swing in the water of such temperature might lead to potential hypothermia within just a few minutes. In January, the sea temperature remains relatively stable. The average temperature stays close to 50.6°F throughout the month, with minimal changes.
Date 10 years average 2024 2023
Jan 1 51.7°F 52.3°F 50.9°F
Jan 2 51.6°F 52.2°F 50.9°F
Jan 3 51.5°F 52.0°F 50.6°F
Jan 4 51.5°F 52.0°F 50.6°F
Jan 5 51.5°F 52.0°F 50.4°F
Jan 6 51.4°F 51.7°F 51.2°F
Jan 7 51.3°F 51.6°F 51.1°F
Jan 8 51.3°F 51.4°F 51.5°F
Jan 9 51.2°F 51.0°F 51.3°F
Jan 10 51.2°F 51.1°F 51.2°F
Jan 11 51.0°F 50.9°F 51.1°F
Jan 12 50.8°F 50.5°F 51.0°F
Jan 13 50.8°F 50.4°F 51.1°F
Jan 14 50.8°F 50.4°F 51.1°F
Jan 15 50.7°F 50.2°F 51.2°F
Jan 16 50.6°F 50.1°F 51.0°F
Jan 17 50.5°F 50.1°F 50.7°F
Jan 18 50.4°F 50.1°F 50.5°F
Jan 19 50.3°F 49.8°F 50.2°F
Jan 20 50.2°F 49.9°F 49.8°F
Jan 21 50.2°F 49.7°F 50.1°F
Jan 22 50.1°F 49.7°F 50.3°F
Jan 23 50.1°F 49.6°F 50.1°F
Jan 24 50.1°F 49.5°F 50.1°F
Jan 25 50.0°F 49.4°F 49.9°F
Jan 26 50.1°F 49.4°F 49.9°F
Jan 27 49.9°F 49.0°F 49.8°F
Jan 28 49.8°F 48.9°F 49.6°F
Jan 29 49.7°F 48.9°F 49.5°F
Jan 30 49.6°F 48.9°F 49.2°F
Jan 31 49.6°F 49.2°F 49.4°F

Sea water temperature in Plymouth by month

In an average year, Plymouth offers no days when the water temperature is warm enough to swim comfortably. The warmest water in Plymouth was recorded on August 15, 2022, reaching a 66.6°F. While the coldest temperature occurred on March 20, 2018, dipping to 45.6°F. The average readings by season are 50.9°F in Winter, 50.9°F in Spring, 60.4°F in Summer, and 59.1°F in Autumn. January's average temperature is a slight drop from December's average of 53.0°F. In February, the temperature is expected to decrease further, potentially averaging around 49.1°F.