Caernarfon Water Temperature

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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	/
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 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.

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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
Sep. 07	Few clouds	72 °F 59°F	22 °C 15°C	2mph (3km/h) northeast	0in (0mm) 0 %	85%
Sep. 08	Moderate rain	62 °F 56°F	17 °C 13°C	2mph (4km/h) east-southeast	0in (11mm) 85 %	92%
Sep. 09	Overcast clouds	57 °F 53°F	14 °C 11°C	3mph (4km/h) northwest	0in (0mm) 10 %	75%
Sep. 10	Moderate rain	54 °F 46°F	12 °C 8°C	5mph (7km/h) west-northwest	1in (13mm) 85 %	78%
Sep. 11	Heavy rain	53 °F 45°F	12 °C 7°C	5mph (8km/h) northwest	1in (31mm) 95 %	83%
Sep. 12	Light shower rain	54 °F 47°F	12 °C 9°C	4mph (6km/h) west	0in (2mm) 45 %	70%
Sep. 13	Heavy rain	60 °F 53°F	15 °C 11°C	5mph (8km/h) southwest	1in (30mm) 95 %	87%

+9-day forecast

Date	Weather	Max. F Min. F	Max. C Min. C	Windspeed Windir.	Precip. Rainrisk	Rel. Humidity
Sep. 14	Heavy rain	61 °F 60°F	16 °C 15°C	4mph (7km/h) southwest	1in (21mm) 90 %	96%
Sep. 15	Broken clouds	60 °F 56°F	16 °C 13°C	5mph (8km/h) southwest	0in (1mm) 35 %	85%
Sep. 16	Heavy rain	62 °F 54°F	17 °C 12°C	4mph (7km/h) south-southwest	1in (31mm) 95 %	90%
Sep. 17	Light rain	58 °F 50°F	15 °C 10°C	4mph (7km/h) west	0in (9mm) 80 %	81%
Sep. 18	Few clouds	59 °F 51°F	15 °C 10°C	3mph (5km/h) south-southwest	0in (0mm) 15 %	80%
Sep. 19	Light shower rain	58 °F 52°F	15 °C 11°C	5mph (9km/h) west-southwest	0in (2mm) 45 %	76%
Sep. 20	Few clouds	58 °F 48°F	15 °C 9°C	4mph (7km/h) west	0in (1mm) 25 %	78%
Sep. 21	Light shower rain	60 °F 52°F	15 °C 11°C	2mph (3km/h) west	0in (2mm) 45 %	84%
Sep. 22	Broken clouds	63 °F 55°F	17 °C 13°C	3mph (6km/h) west-southwest	0in (0mm) 15 %	81%

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%

The hottest 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 temperature. March is the month with the lowest precipitation of 1.1in / 27.4mm and December with the maximum 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

Irish Sea