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Belfast in January

Find out everything about the water temperature in Belfast 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:

42.4 °F

Average:

47.2 °F

Maximum:

50.1 °F

Sea water temperature in Belfast in January

In the city of Belfast, the month of January is too cold for swimming. The minimum recorded temperature during this month was 42.4°F on January 9, 2021, with an average temperature being 47.2°F and a maximum temperature reaching 50.1°F on January 1, 2017.

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 47.2°F throughout the month, with minimal changes.
Date 10 years average 2024 2023
Jan 1 48.6°F 49.5°F 49.1°F
Jan 2 48.5°F 49.1°F 49.0°F
Jan 3 48.4°F 49.0°F 48.9°F
Jan 4 48.2°F 48.9°F 48.4°F
Jan 5 48.1°F 48.8°F 48.3°F
Jan 6 47.9°F 48.6°F 47.4°F
Jan 7 47.8°F 48.2°F 47.2°F
Jan 8 47.6°F 47.4°F 47.3°F
Jan 9 47.5°F 47.4°F 47.4°F
Jan 10 47.3°F 47.3°F 47.1°F
Jan 11 47.2°F 47.3°F 46.6°F
Jan 12 47.0°F 47.3°F 46.5°F
Jan 13 47.0°F 47.3°F 46.6°F
Jan 14 47.0°F 47.4°F 46.7°F
Jan 15 47.0°F 47.4°F 46.7°F
Jan 16 46.9°F 47.5°F 46.9°F
Jan 17 46.8°F 47.4°F 46.8°F
Jan 18 46.8°F 47.4°F 46.8°F
Jan 19 46.8°F 47.4°F 46.9°F
Jan 20 46.9°F 47.4°F 46.9°F
Jan 21 47.0°F 47.4°F 46.9°F
Jan 22 46.9°F 47.1°F 46.9°F
Jan 23 46.9°F 46.7°F 47.0°F
Jan 24 46.9°F 46.5°F 47.0°F
Jan 25 46.8°F 46.4°F 47.0°F
Jan 26 46.9°F 46.3°F 46.9°F
Jan 27 46.8°F 46.2°F 46.6°F
Jan 28 46.7°F 46.2°F 46.5°F
Jan 29 46.6°F 46.2°F 46.5°F
Jan 30 46.5°F 46.0°F 46.1°F
Jan 31 46.5°F 45.8°F 46.2°F

Sea water temperature in Belfast by month

In an average year, Belfast offers no days when the water temperature is warm enough to swim comfortably. The warmest water in Belfast was recorded on August 14, 2022, reaching a 62.9°F. While the coldest temperature occurred on January 9, 2021, dipping to 42.4°F. The average readings by season are 47.8°F in Winter, 47.6°F in Spring, 56.3°F in Summer, and 55.8°F in Autumn. January's average temperature is a slight drop from December's average of 50.3°F. In February, the temperature is expected to decrease further, potentially averaging around 45.8°F.