Search for cities, countries, lakes and rivers
Sea Temperature in Portstewart in January
Complete information on the sea temperature range in the Irish Sea in Portstewart in January. Historical daily data. Climate details for January. Tips on swimming conditions and beach relaxation in Portstewart. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.
Water Temperature Range in Portstewart in January
7°C
MINIMUN
9°C
AVERAGE
11°C
MAXIMUM
Historical Data of Water Temperature in January in Portstewart
Water Temperature Chart for Irish Sea in Portstewart in January
Sea Temperature Table in Portstewart in January Over the Past Years
| Day | 2024 | 2023 | 2022 | Average |
|---|---|---|---|---|
| Jan 1 | 9°C | 7°C | 9°C | 8.8°C |
| Jan 2 | 9°C | 10°C | 7°C | 9.0°C |
| Jan 3 | 9°C | 10°C | 10°C | 9.8°C |
| Jan 4 | 9°C | 9°C | 10°C | 9.5°C |
| Jan 5 | 9°C | 9°C | 8°C | 9.0°C |
| Jan 6 | 9°C | 9°C | 7°C | 8.8°C |
| Jan 7 | 9°C | 10°C | 7°C | 9.0°C |
| Jan 8 | 9°C | 10°C | 8°C | 9.3°C |
| Jan 9 | 9°C | 9°C | 7°C | 8.8°C |
| Jan 10 | 9°C | 9°C | 8°C | 9.0°C |
| Jan 11 | 8°C | 9°C | 9°C | 9.0°C |
| Jan 12 | 8°C | 9°C | 7°C | 8.3°C |
| Jan 13 | 9°C | 9°C | 8°C | 8.8°C |
| Jan 14 | 8°C | 9°C | 10°C | 8.8°C |
| Jan 15 | 9°C | 9°C | 10°C | 9.0°C |
| Jan 16 | 9°C | 9°C | 9°C | 8.8°C |
| Jan 17 | 9°C | 9°C | 9°C | 9.0°C |
| Jan 18 | 9°C | 8°C | 9°C | 8.8°C |
| Jan 19 | 9°C | 8°C | 8°C | 8.5°C |
| Jan 20 | 8°C | 8°C | 8°C | 8.3°C |
| Jan 21 | 8°C | 8°C | 10°C | 8.8°C |
| Jan 22 | 8°C | 8°C | 7°C | 8.0°C |
| Jan 23 | 8°C | 8°C | 8°C | 8.3°C |
| Jan 24 | 8°C | 9°C | 9°C | 8.8°C |
| Jan 25 | 8°C | 8°C | 9°C | 8.5°C |
| Jan 26 | 8°C | 8°C | 7°C | 8.0°C |
| Jan 27 | 8°C | 8°C | 9°C | 8.5°C |
| Jan 28 | 8°C | 8°C | 8°C | 8.3°C |
| Jan 29 | 9°C | 8°C | 8°C | 8.5°C |
| Jan 30 | 8°C | 8°C | 9°C | 8.5°C |
Portstewart Climate and Swimming Opportunities in January
8°C
Average Day Air Temperature
3°C
Average Night Air Temperature
122 mm
Precipitation Amount per Month
19 days
Number of Rainy Days
8 hrs
Daylight
per Day
1 hrs
Sunshine
per Day
23 km/h
Average Wind Speed
90%
Average
humidity
Portstewart lies within the Northen Ireland in United Kingdom. The average daytime temperature in Portstewart in January is 8°C (46°F), while the nighttime average is 3°C (37°F). There are typically 19 rainy days during the month, with a total precipitation of 122 mm (4.8 inches). The daylight duration in January in Portstewart is 8 hours, with an average of 1 hours of sunshine per day. The average wind speed in January is 23 km/h (14 mph), and the humidity level is around 90%.
The water temperature in Portstewart in January ranges from 8°C to 9°C (46°F to 48°F). At the beginning of the month, the average temperature is around 9°C (48°F), shifting to 9°C (48°F) by mid-January and reaching 8°C (46°F) in the last ten days. Overall, the average sea temperature in Portstewart for January is 9°C (48°F). Still too cold for most swimmers. Only short dips in proper gear are advisable.
Sea Temperature in January in Nearby Cities
Frequently Asked Questions About Water Temperatures in January in Portstewart
What is the sea temperature in Portstewart in January?
The water temperature in the Irish Sea in Portstewart in January ranges from 8°C to 9°C (46°F to 48°F).
Is it possible to swim in the Irish Sea in Portstewart in January?
The average sea temperature in Portstewart in January is 9°C (48°F), and the air temperature is 8°C (46°F), so still too cold for most swimmers. Only short dips in proper gear are advisable.