Porthmadog Water Temperature

Porthmadog is a town close to Irish Sea. temperate oceanic climate with warm summer would be the climate here. August is the month with the highest water temperature at 59.9°F / 15.5°C. The month with the lowest is March with an average water temperature of 45.1°F / 7.3°C. The avg. air temperature is around 58.8°F / 14.9°C, July is the month with the highest temperature. February is the coolest with 39.6°F / 4.2°C average air temperature. March is the month with the min. precipitation of 1.5in / 38.7mm and December with the max. precipitation in a year with 6.3in / 160.7mm. June, July, August, September would be the best time to visit this place.

Porthmadog Summary

Description Value
Current water temperature 8 °C / 46.4 °F
Warmest Month Water Temperature: August with 15.5°C / 59.9°F
Coldest Month Water Temperature: March with 7.3°C / 45.1°F
Warmest Month Air Temperature: July with 14.9°C / 58.8°F
Coldest Month Air Temperature: February with 4.2°C / 39.6°F
Wettest Month: December with 160.7mm / 6.3in
Driest Month: March with 38.7mm / 1.5in
Highest Humidity December with 89%
Lowest Humidity May with 79.4%
Best Time to Visit: June, July, August, September
Climate Classification temperate oceanic climate with warm summer

Porthmadog water temperature by month

Irish Sea water temperature by month

Max. Water

Temperature (°C)

ø. Water

Temperature (°C)

Min. Water

Temperature (°C)

January

9.2 8.5 7.9

February

7.9 7.6 7.3

March

7.6 7.3 7.1

April

9.1 8.3 7.6

May

11.2 10 9.1

June

13.4 12.3 11.2

July

15 14.3 13.4

August

15.8 15.5 15

September

15.8 15.5 15

October

15.1 14.3 13.3

November

13.3 12.2 11

December

11 10.1 9.2

Irish Sea water temperature by month

Max. Water

Temperature (°F)

ø. Water

Temperature (°F)

Min. Water

Temperature (°F)

January

48.6 47.3 46.2

February

46.2 45.7 45.1

March

45.7 45.1 44.8

April

48.4 46.9 45.7

May

52.2 50 48.4

June

56.1 54.1 52.2

July

59 57.7 56.1

August

60.4 59.9 59

September

60.4 59.9 59

October

59.2 57.7 55.9

November

55.9 54 51.8

December

51.8 50.2 48.6
The warmest water temperature are in August with around 59.9°F / 15.5°C. The coldest in March with an average water temperature of 45.1°F / 7.3°C.

Porthmadog weather today & 14-day weather forecast

Date
Weather
Max. F
Min. F
Max. C
Min. C
Windspeed
Windir.
Precip.
Rainrisk
Rel. Humidity
Apr. 14
Scattered clouds
53 °F
38°F
12 °C
4°C
1mph (2km/h)
east-southeast
0in (0mm)
15 %
62%
Apr. 15
Broken clouds
51 °F
39°F
11 °C
4°C
2mph (2km/h)
southeast
0in (0mm)
20 %
68%
Apr. 16
Scattered clouds
51 °F
38°F
11 °C
3°C
2mph (2km/h)
south-southeast
0in (0mm)
0 %
61%
Apr. 17
Overcast clouds
48 °F
36°F
9 °C
2°C
2mph (3km/h)
south-southeast
0in (0mm)
0 %
72%
Apr. 18
Overcast clouds
47 °F
41°F
8 °C
5°C
4mph (7km/h)
south
0in (1mm)
45 %
87%
Apr. 19
Light rain
49 °F
45°F
10 °C
7°C
4mph (6km/h)
south
0in (10mm)
90 %
96%
Apr. 20
Scattered clouds
51 °F
38°F
11 °C
3°C
3mph (5km/h)
east-northeast
0in (2mm)
60 %
75%
Date
Weather
Max. F
Min. F
Max. C
Min. C
Windspeed
Windir.
Precip.
Rainrisk
Rel. Humidity
Apr. 21
Overcast clouds
55 °F
37°F
13 °C
3°C
1mph (2km/h)
south-southeast
0in (0mm)
0 %
74%
Apr. 22
Broken clouds
63 °F
41°F
17 °C
5°C
1mph (2km/h)
south
0in (0mm)
0 %
75%
Apr. 23
Few clouds
55 °F
42°F
13 °C
6°C
1mph (1km/h)
east-northeast
0in (0mm)
0 %
70%
Apr. 24
Few clouds
52 °F
39°F
11 °C
4°C
2mph (3km/h)
east-northeast
0in (0mm)
0 %
62%
Apr. 25
Broken clouds
48 °F
42°F
9 °C
5°C
2mph (3km/h)
east-northeast
0in (0mm)
20 %
71%
Apr. 26
Overcast clouds
48 °F
37°F
9 °C
3°C
2mph (4km/h)
east-northeast
0in (0mm)
0 %
72%
Apr. 27
Few clouds
58 °F
38°F
14 °C
4°C
2mph (3km/h)
northeast
0in (0mm)
0 %
78%
Apr. 28
Overcast clouds
50 °F
40°F
10 °C
4°C
2mph (4km/h)
northwest
0in (0mm)
25 %
86%
Apr. 29
Overcast clouds
51 °F
42°F
11 °C
6°C
3mph (4km/h)
west-northwest
0in (0mm)
10 %
79%

Porthmadog weather by month / climate table

Max.

Temperature

°C

ø.

Temperature

°C

Min.

Temperature

(°C)

Precip.

(mm)

Rainy Days

(d)

Rel. Humidity

(%)

January

7 4.4 1.4 135.4 17 88.6%

February

7.1 4.2 1.1 100.6 10 85.7%

March

9.7 5.3 0.4 39.7 7 83.1%

April

13.2 7.7 2.8 40.5 6 79.6%

May

15 10.6 5.5 45.3 10 79.4%

June

18.3 13.3 8.9 38.7 7 80.2%

July

18.9 14.9 11.1 50.6 16 82.1%

August

18.4 14.6 11 125.4 19 84.7%

September

17.2 13 8.9 59.1 11 84.4%

October

14.8 10.3 6.4 120 0 85.7%

November

11.2 7.2 3 145.5 17 88.3%

December

8.1 5.1 1.5 160.7 17 89%

Max.

Temperature

°F

ø.

Temperature

°F

Min.

Temperature

(°F)

Precip.

(in)

Rainy Days

(d)

Rel. Humidity

(%)

January

44.6 39.9 34.5 5.3 17 88.6%

February

44.8 39.6 34 4 10 85.7%

March

49.5 41.5 32.7 1.6 7 83.1%

April

55.8 45.9 37 1.6 6 79.6%

May

59 51.1 41.9 1.8 10 79.4%

June

64.9 55.9 48 1.5 7 80.2%

July

66 58.8 52 2 16 82.1%

August

65.1 58.3 51.8 4.9 19 84.7%

September

63 55.4 48 2.3 11 84.4%

October

58.6 50.5 43.5 4.7 0 85.7%

November

52.2 45 37.4 5.7 17 88.3%

December

46.6 41.2 34.7 6.3 17 89%
The warmest avg. temperature is around 58.8°F / 14.9°C, July is the month with the highest temperature. February is the coolest with 39.6°F / 4.2°C average air temperature. March is the month with the min. precipitation of 1.5in / 38.7mm and December with the max. precipitation in a year with 6.3in / 160.7mm.

Activities & POI in Porthmadog

Type of Activity List
Marina for Sailing, Boat adventures, fishing Porthmadoc Harbour
Golf Course Putting green
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