Porthmadog Water Temperature

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

Porthmadog 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 4.2°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

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Porthmadog 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	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

°F

Irish Sea water temperature by month

	Max. Water Temperature (°F)	ø. Water Temperature (°F)	Min. Water Temperature (°F)
January	48.6	47.3	46.2
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

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.

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Porthmadog 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
Nov. 23	Mix snow/rain	57 °F 39°F	14 °C 4°C	6mph (9km/h) south	2in (41mm) 95 %	85%
Nov. 24	Heavy rain	53 °F 51°F	12 °C 11°C	7mph (11km/h) south-southwest	1in (16mm) 90 %	80%
Nov. 25	Light rain	47 °F 44°F	8 °C 7°C	4mph (6km/h) west-southwest	0in (8mm) 80 %	76%
Nov. 26	Few clouds	43 °F 36°F	6 °C 2°C	1mph (2km/h) southwest	0in (0mm) 10 %	84%
Nov. 27	Scattered clouds	42 °F 33°F	5 °C 0°C	1mph (2km/h) east	0in (0mm) 0 %	89%
Nov. 28	Few clouds	40 °F 33°F	5 °C 1°C	1mph (2km/h) east-southeast	0in (0mm) 20 %	85%
Nov. 29	Few clouds	41 °F 33°F	5 °C 1°C	2mph (3km/h) southeast	0in (0mm) 0 %	88%

+9-day forecast

Date	Weather	Max. F Min. F	Max. C Min. C	Windspeed Windir.	Precip. Rainrisk	Rel. Humidity
Nov. 30	Broken clouds	42 °F 35°F	6 °C 2°C	2mph (3km/h) southeast	0in (0mm) 0 %	78%
Dec. 01	Few clouds	39 °F 32°F	4 °C -0°C	2mph (3km/h) east-southeast	0in (0mm) 0 %	91%
Dec. 02	Overcast clouds	39 °F 32°F	4 °C 0°C	1mph (2km/h) east-southeast	0in (0mm) 0 %	87%
Dec. 03	Overcast clouds	39 °F 33°F	4 °C 0°C	1mph (1km/h) east-southeast	0in (0mm) 0 %	81%
Dec. 04	Overcast clouds	39 °F 36°F	4 °C 2°C	1mph (2km/h) east-northeast	0in (0mm) 0 %	82%
Dec. 05	Broken clouds	41 °F 33°F	5 °C 1°C	2mph (3km/h) northeast	0in (0mm) 0 %	84%
Dec. 06	Overcast clouds	40 °F 34°F	5 °C 1°C	2mph (3km/h) northeast	0in (0mm) 0 %	87%
Dec. 07	Broken clouds	41 °F 39°F	5 °C 4°C	2mph (3km/h) east-northeast	0in (0mm) 20 %	86%
Dec. 08	Broken clouds	42 °F 39°F	6 °C 4°C	2mph (3km/h) east-northeast	0in (0mm) 20 %	78%

Porthmadog weather by month / climate table

°C

	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%

°F

	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 hottest 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 temperature. March is the month with the lowest precipitation of 1.5in / 38.7mm and December with the maximum 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

Irish Sea