Weather in January
Sea temperature
In January, the average sea temperature in Portland, United Kingdom, is 9.7°C (49.5°F).Note: Dipping in 9.7°C (49.5°F) at temperatures less than 10°C (50°F) without proper gear can lead to pronounced cold shock and breathing difficulties.
Daylight
In January, the average length of the day in Portland is 8h and 35min.On the first day of the month, sunrise is at 8:10 am and sunset at 4:15 pm. On the last day of January, sunrise is at 7:46 am and sunset at 4:59 pm GMT.
Updated: Feb 8, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the sea water temperature in January in Portland?
In Portland, the average seawater temperature in January is 9.7°C (49.5°F). At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.
What is the average length of the day in January in Portland?
In Portland, the average day length in January is 8h and 35min.
What time are sunrise and sunset in January in Portland?
On the first day of January in Portland, sunrise is at 8:10 am and sunset at 4:15 pm. On the last day of the month, sunrise is at 7:46 am and sunset at 4:59 pm GMT.
Average sea temperature in January
Portland, United Kingdom
- Average sea temperature in January: 9.7°C
The best month for swimming (with the highest average sea temperature) is September (17.1°C).
The coldest month (with the lowest average sea temperature) is March (8.8°C).
Average daylight in January
Portland, United Kingdom
- Average daylight in January: 8h and 4min
The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 6min).
Portland, United Kingdom
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