Sea Temperature in Portstewart in July

Complete information on the sea temperature range in the Irish Sea in Portstewart in July. Historical daily data. Climate details for July. 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 July

11°C

MINIMUN

13.5°C

AVERAGE

16°C

MAXIMUM

Historical Data of Water Temperature in July in Portstewart

Water Temperature Chart for Irish Sea in Portstewart in July

Sea Temperature Table in Portstewart in July Over the Past Years

Day	2024	2023	2022	Average
Jul 1	12°C	13°C	12°C	12.3°C
Jul 2	13°C	13°C	13°C	12.8°C
Jul 3	13°C	13°C	13°C	12.8°C
Jul 4	13°C	12°C	12°C	12.3°C
Jul 5	13°C	12°C	12°C	12.3°C
Jul 6	13°C	13°C	13°C	12.8°C
Jul 7	13°C	13°C	13°C	12.8°C
Jul 8	12°C	12°C	13°C	12.3°C
Jul 9	13°C	12°C	13°C	12.8°C
Jul 10	13°C	13°C	13°C	13.0°C
Jul 11	14°C	13°C	13°C	13.0°C
Jul 12	13°C	13°C	13°C	13.0°C
Jul 13	14°C	13°C	14°C	13.5°C
Jul 14	14°C	13°C	14°C	13.3°C
Jul 15	13°C	15°C	14°C	13.8°C
Jul 16	14°C	13°C	14°C	13.5°C
Jul 17	14°C	13°C	14°C	13.5°C
Jul 18	13°C	13°C	13°C	13.0°C
Jul 19	14°C	13°C	13°C	13.3°C
Jul 20	14°C	13°C	14°C	13.5°C
Jul 21	14°C	13°C	14°C	13.5°C
Jul 22	15°C	13°C	14°C	13.8°C
Jul 23	14°C	13°C	14°C	13.5°C
Jul 24	15°C	13°C	14°C	13.8°C
Jul 25	14°C	13°C	14°C	13.5°C
Jul 26	14°C	13°C	14°C	13.5°C
Jul 27	15°C	13°C	14°C	13.8°C
Jul 28	15°C	13°C	14°C	13.8°C
Jul 29	15°C	13°C	14°C	13.8°C
Jul 30	15°C	13°C	14°C	13.8°C

Portstewart Climate and Swimming Opportunities in July

18°C

Average Day Air Temperature

11°C

Average Night Air Temperature

82 mm

Precipitation Amount per Month

16 days

Number of Rainy Days

17 hrs

Daylight
per Day

4 hrs

Sunshine
per Day

16 km/h

Average Wind Speed

87%

Average
humidity

Portstewart lies within the Northen Ireland in United Kingdom. The average daytime temperature in Portstewart in July is 18°C (65°F), while the nighttime average is 11°C (53°F). There are typically 16 rainy days during the month, with a total precipitation of 82 mm (3.2 inches). The daylight duration in July in Portstewart is 17 hours, with an average of 4 hours of sunshine per day. The average wind speed in July is 16 km/h (10 mph), and the humidity level is around 87%.

The water temperature in Portstewart in July ranges from 12°C to 13°C (54°F to 55°F). At the beginning of the month, the average temperature is around 13°C (55°F), shifting to 13°C (55°F) by mid-July and reaching 14°C (57°F) in the last ten days. Overall, the average sea temperature in Portstewart for July is 13°C (55°F). Ideal conditions for a refreshing swim, though some may still find it a bit cool.

Sea Temperature in July in Nearby Cities

Frequently Asked Questions About Water Temperatures in July in Portstewart

What is the sea temperature in Portstewart in July?

The water temperature in the Irish Sea in Portstewart in July ranges from 12°C to 13°C (54°F to 55°F).

Is it possible to swim in the Irish Sea in Portstewart in July?

The average sea temperature in Portstewart in July is 13°C (55°F), and the air temperature is 18°C (65°F), so ideal conditions for a refreshing swim, though some may still find it a bit cool.