Caernarfon Water Temperature

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Caernarfon is a town close to Irish Sea. August is the month with the hottest water temperature at 59.9°F / 15.5°C. The coldest month is March with an ø water temperature of 45.1°F / 7.3°C. March is the month with the lowest precipitation of 1.1in / 27.4mm and December with the highest precipitation in a year with 6.3in / 158.9mm. 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. June, July, August, September would be the best time to visit. temperate oceanic climate with warm summer would be the climate here.

Caernarfon Summary

Description	Value
Current water temperature	/
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

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Caernarfon water temperature by month

°C

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

°F

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 highest water temperature will be reached in August with around 59.9°F / 15.5°C. The lowest in March with an average water temperature of 45.1°F / 7.3°C.

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Caernarfon weather today & 14-day weather forecast

7-day weather forecast
+9-day forecast

7-day weather forecast

Date	Weather	Max. F Min. F	Max. C Min. C	Windspeed Windir.	Precip. Rainrisk	Rel. Humidity
Apr. 01	Scattered clouds	60 °F 44°F	16 °C 7°C	2mph (3km/h) east	0in (0mm) 0 %	48%
Apr. 02	Clear Sky	60 °F 41°F	16 °C 5°C	2mph (4km/h) east-northeast	0in (0mm) 0 %	57%
Apr. 03	Broken clouds	64 °F 45°F	18 °C 7°C	3mph (6km/h) east-northeast	0in (0mm) 20 %	61%
Apr. 04	Broken clouds	66 °F 53°F	19 °C 11°C	3mph (4km/h) east	0in (1mm) 30 %	56%
Apr. 05	Clear Sky	60 °F 49°F	16 °C 9°C	3mph (5km/h) east-southeast	0in (0mm) 0 %	36%
Apr. 06	Clear Sky	57 °F 44°F	14 °C 7°C	2mph (4km/h) east-southeast	0in (0mm) 0 %	37%
Apr. 07	Clear Sky	51 °F 46°F	10 °C 8°C	1mph (2km/h) south-southwest	0in (0mm) 0 %	79%

+9-day forecast

Date	Weather	Max. F Min. F	Max. C Min. C	Windspeed Windir.	Precip. Rainrisk	Rel. Humidity
Apr. 08	Few clouds	52 °F 47°F	11 °C 8°C	1mph (2km/h) east	0in (0mm) 0 %	74%
Apr. 09	Few clouds	53 °F 46°F	12 °C 8°C	1mph (2km/h) southeast	0in (0mm) 0 %	72%
Apr. 10	Scattered clouds	54 °F 47°F	12 °C 9°C	2mph (3km/h) southwest	0in (0mm) 0 %	73%
Apr. 11	Few clouds	50 °F 46°F	10 °C 8°C	2mph (3km/h) west	0in (0mm) 0 %	80%
Apr. 12	Broken clouds	54 °F 47°F	12 °C 8°C	1mph (2km/h) east	0in (0mm) 0 %	76%
Apr. 13	Broken clouds	52 °F 48°F	11 °C 9°C	1mph (2km/h) east-southeast	0in (1mm) 30 %	85%
Apr. 14	Light rain	52 °F 47°F	11 °C 8°C	2mph (3km/h) southeast	0in (8mm) 80 %	84%
Apr. 15	Moderate rain	50 °F 42°F	10 °C 6°C	4mph (6km/h) southwest	1in (13mm) 85 %	78%
Apr. 16	Light shower rain	55 °F 44°F	13 °C 6°C	3mph (5km/h) east	0in (5mm) 70 %	76%

Caernarfon weather by month / climate table

°C

	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%

°F

	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%

March is the driest at 1.1in / 27.4mm and December the wettest month with 6.3in / 158.9mm. With an average temperature of 58.8°F / 14.9°C, July is the warmest month in a year. February is the coldest with 40.6°F / 4.8°C average temperature.

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

Irish Sea