Caernarfon Water Temperature

Caernarfon 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 40.6°F / 4.8°C average air temperature. March is the month with the min. precipitation of 1.1in / 27.4mm and December with the max. precipitation in a year with 6.3in / 158.9mm. If you plan to visit this place, the month June, July, August, September would be the best time.

Caernarfon 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 4.8°C / 40.6°F
Wettest Month: December with 158.9mm / 6.3in
Driest Month: March with 27.4mm / 1.1in
Highest Humidity December with 85.1%
Lowest Humidity May with 78.9%
Best Time to Visit: June, July, August, September
Climate Classification temperate oceanic climate with warm summer

Caernarfon 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 8

February

8 7.6 7.4

March

7.7 7.3 7.1

April

9 8.3 7.6

May

11.2 10 9

June

13.4 12.3 11.2

July

15.1 14.3 13.4

August

15.7 15.4 15

September

15.7 15.4 14.9

October

15 14.2 13.3

November

13.3 12.2 11.1

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 46.4

February

46.4 45.7 45.3

March

45.9 45.1 44.8

April

48.2 46.9 45.7

May

52.2 50 48.2

June

56.1 54.1 52.2

July

59.2 57.7 56.1

August

60.3 59.7 59

September

60.3 59.7 58.8

October

59 57.6 55.9

November

55.9 54 52

December

51.8 50.2 48.6
The hottest water temperature typically reached 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.

Caernarfon weather today & 14-day weather forecast

Date
Weather
Max. F
Min. F
Max. C
Min. C
Windspeed
Windir.
Precip.
Rainrisk
Rel. Humidity
Jan. 26
Light shower rain
47 °F
39°F
9 °C
4°C
4mph (7km/h)
south
0in (3mm)
75 %
88%
Jan. 27
Light shower rain
48 °F
45°F
9 °C
7°C
1mph (2km/h)
south-southeast
0in (5mm)
85 %
89%
Jan. 28
Heavy rain
50 °F
47°F
10 °C
8°C
3mph (5km/h)
south
1in (21mm)
95 %
88%
Jan. 29
Light shower rain
46 °F
42°F
8 °C
5°C
3mph (5km/h)
south
0in (3mm)
75 %
92%
Jan. 30
Overcast clouds
39 °F
32°F
4 °C
-0°C
4mph (6km/h)
east
0in (0mm)
0 %
76%
Jan. 31
Light rain
49 °F
32°F
9 °C
0°C
2mph (3km/h)
south-southeast
0in (5mm)
85 %
82%
Feb. 01
Heavy rain
47 °F
45°F
9 °C
7°C
5mph (7km/h)
south-southwest
1in (27mm)
95 %
94%
Date
Weather
Max. F
Min. F
Max. C
Min. C
Windspeed
Windir.
Precip.
Rainrisk
Rel. Humidity
Feb. 02
Light shower rain
43 °F
38°F
6 °C
4°C
4mph (7km/h)
southwest
0in (4mm)
80 %
84%
Feb. 03
Heavy rain
42 °F
37°F
6 °C
3°C
4mph (6km/h)
south
1in (23mm)
95 %
88%
Feb. 04
Scattered clouds
47 °F
35°F
8 °C
2°C
4mph (6km/h)
southwest
0in (1mm)
55 %
83%
Feb. 05
Heavy rain
39 °F
39°F
4 °C
4°C
8mph (12km/h)
southwest
1in (20mm)
95 %
85%
Feb. 06
Overcast clouds
36 °F
34°F
2 °C
1°C
2mph (3km/h)
southwest
0in (2mm)
60 %
88%
Feb. 07
Light rain
37 °F
35°F
3 °C
2°C
5mph (7km/h)
west-southwest
0in (5mm)
85 %
91%
Feb. 08
Overcast clouds
41 °F
33°F
5 °C
0°C
4mph (6km/h)
west
0in (1mm)
55 %
79%
Feb. 09
Broken clouds
41 °F
35°F
5 °C
2°C
2mph (3km/h)
south
0in (2mm)
65 %
89%
Feb. 10
Overcast clouds
42 °F
36°F
6 °C
2°C
1mph (2km/h)
south-southwest
0in (1mm)
50 %
91%

Caernarfon weather by month / climate table

Max.

Temperature

°C

ø.

Temperature

°C

Min.

Temperature

(°C)

Precip.

(mm)

Rainy Days

(d)

Rel. Humidity

(%)

January

7.5 5 2 132.4 17 84.9%

February

7.4 4.8 2.1 92.4 13 82.8%

March

9.4 5.7 1.3 27.4 9 81.6%

April

12.5 7.8 3.5 53.5 6 79.2%

May

14.3 10.6 6 29.1 12 78.9%

June

17.7 13.2 9.2 37.1 8 79.7%

July

18.3 14.9 11.4 51.7 16 81%

August

18 14.7 11.6 125.5 18 83.1%

September

16.9 13.4 9.7 68.6 14 82.3%

October

14.7 10.8 7.4 126.7 0 82.7%

November

11.3 7.8 4.1 143.7 19 84.5%

December

8.6 5.7 2.5 158.9 17 85.1%

Max.

Temperature

°F

ø.

Temperature

°F

Min.

Temperature

(°F)

Precip.

(in)

Rainy Days

(d)

Rel. Humidity

(%)

January

45.5 41 35.6 5.2 17 84.9%

February

45.3 40.6 35.8 3.6 13 82.8%

March

48.9 42.3 34.3 1.1 9 81.6%

April

54.5 46 38.3 2.1 6 79.2%

May

57.7 51.1 42.8 1.1 12 78.9%

June

63.9 55.8 48.6 1.5 8 79.7%

July

64.9 58.8 52.5 2 16 81%

August

64.4 58.5 52.9 4.9 18 83.1%

September

62.4 56.1 49.5 2.7 14 82.3%

October

58.5 51.4 45.3 5 0 82.7%

November

52.3 46 39.4 5.7 19 84.5%

December

47.5 42.3 36.5 6.3 17 85.1%
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 40.6°F / 4.8°C average air temperature. March is the month with the min. precipitation of 1.1in / 27.4mm and December with the max. precipitation in a year with 6.3in / 158.9mm.

Activities & POI in Caernarfon

Type of Activity List
Marina for Sailing, Boat adventures, fishing Caernarfon Marina
Attraction Castell Caernarfon
Caravan Site Coed Helen Caravan Park
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