Sea Temperature in Porthmadog in May

Complete information on the sea temperature range in the Celtic Sea in Porthmadog in May. Historical daily data. Climate details for May. Tips on swimming conditions and beach relaxation in Porthmadog. 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 Porthmadog in May

9°C

MINIMUN

11.5°C

AVERAGE

14°C

MAXIMUM

Historical Data of Water Temperature in May in Porthmadog

Water Temperature Chart for Celtic Sea in Porthmadog in May

Sea Temperature Table in Porthmadog in May Over the Past Years

Day	2024	2023	2022	Average
May 1	10°C	10°C	10°C	10.0°C
May 2	10°C	10°C	12°C	10.5°C
May 3	10°C	10°C	12°C	10.5°C
May 4	10°C	10°C	12°C	10.5°C
May 5	10°C	11°C	10°C	10.3°C
May 6	10°C	11°C	12°C	10.8°C
May 7	10°C	10°C	12°C	10.8°C
May 8	10°C	11°C	10°C	10.5°C
May 9	10°C	11°C	10°C	10.3°C
May 10	10°C	11°C	12°C	11.0°C
May 11	10°C	11°C	12°C	11.3°C
May 12	10°C	11°C	11°C	11.0°C
May 13	11°C	11°C	9°C	10.8°C
May 14	11°C	11°C	10°C	11.0°C
May 15	11°C	11°C	9°C	10.8°C
May 16	11°C	11°C	12°C	11.5°C
May 17	11°C	11°C	9°C	11.0°C
May 18	11°C	11°C	10°C	11.3°C
May 19	11°C	11°C	12°C	11.8°C
May 20	12°C	11°C	11°C	11.8°C
May 21	12°C	12°C	12°C	12.3°C
May 22	11°C	12°C	12°C	12.0°C
May 23	11°C	12°C	11°C	11.8°C
May 24	12°C	11°C	11°C	11.8°C
May 25	11°C	12°C	12°C	12.0°C
May 26	12°C	12°C	12°C	12.3°C
May 27	12°C	12°C	9°C	11.3°C
May 28	12°C	12°C	11°C	12.0°C
May 29	12°C	13°C	10°C	12.0°C
May 30	13°C	12°C	12°C	12.5°C

Porthmadog Climate and Swimming Opportunities in May

15°C

Average Day Air Temperature

8°C

Average Night Air Temperature

57 mm

Precipitation Amount per Month

12 days

Number of Rainy Days

16 hrs

Daylight
per Day

6 hrs

Sunshine
per Day

16 km/h

Average Wind Speed

81%

Average
humidity

Porthmadog lies within the Wales in United Kingdom. The average daytime temperature in Porthmadog in May is 15°C (59°F), while the nighttime average is 8°C (46°F). There are typically 12 rainy days during the month, with a total precipitation of 57 mm (2.2 inches). The daylight duration in May in Porthmadog is 16 hours, with an average of 6 hours of sunshine per day. The average wind speed in May is 16 km/h (10 mph), and the humidity level is around 81%.

The water temperature in Porthmadog in May ranges from 9°C to 12°C (48°F to 54°F). At the beginning of the month, the average temperature is around 10°C (50°F), shifting to 11°C (52°F) by mid-May and reaching 12°C (54°F) in the last ten days. Overall, the average sea temperature in Porthmadog for May is 11°C (52°F). Ideal conditions for a refreshing swim, though some may still find it a bit cool.

Sea Temperature in May in Nearby Cities

Frequently Asked Questions About Water Temperatures in May in Porthmadog

What is the sea temperature in Porthmadog in May?

The water temperature in the Celtic Sea in Porthmadog in May ranges from 9°C to 12°C (48°F to 54°F).

Is it possible to swim in the Celtic Sea in Porthmadog in May?

The average sea temperature in Porthmadog in May is 11°C (52°F), and the air temperature is 15°C (59°F), so ideal conditions for a refreshing swim, though some may still find it a bit cool.