Portland Water Temperature

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Portland is a city close to Gulf of Maine. August is the month with the warmest water temperature at 63.5°F / 17.5°C. The coolest month is March with an avg. water temperature of 37.2°F / 2.9°C. October is the sunniest at 0in / 0mm and January the wettest month with 1.7in / 43.1mm. The average air temperature is around 69.3°F / 20.7°C, July is the hottest month in a year. January is the coolest with 24.1°F / -4.4°C average air temperature. Warm-summer humid continental climate would be the climate here. June, July, August, September would be the best time to visit.

Portland Summary

Description	Value
Current water temperature	/
Warmest Month Water Temperature:	August with 63.5°F / 17.5°C
Coldest Month Water Temperature:	March with 37.2°F / 2.9°C
Warmest Month Air Temperature:	July with 69.3°F / 20.7°C
Coldest Month Air Temperature:	January with 24.1°F / -4.4°C
Wettest Month:	January with 1.7in / 43.1mm
Driest Month:	October with 0in / 0mm
Highest Humidity	June with 76%
Lowest Humidity	April with 67.6%
Best Time to Visit:	June, July, August, September
Climate Classification	Warm-summer humid continental climate

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Portland water temperature by month

°F

Gulf of Maine water temperature by month

	Max. Water Temperature (°F)	ø. Water Temperature (°F)	Min. Water Temperature (°F)
January	42.6	40.8	38.8
February	38.7	37.8	37.2
March	38.5	37.4	36.9
April	44.1	40.8	38.5
May	51.3	47.5	44.1
June	58.6	55	51.3
July	63.5	61.3	58.1
August	64.2	63.3	61.9
September	62.6	60.1	57.6
October	57.4	54.1	50.7
November	50.9	48.7	46.8
December	46.8	44.6	42.6

°C

Gulf of Maine water temperature by month

	Max. Water Temperature (°C)	ø. Water Temperature (°C)	Min. Water Temperature (°C)
January	5.9	4.9	3.8
February	3.7	3.2	2.9
March	3.6	3	2.7
April	6.7	4.9	3.6
May	10.7	8.6	6.7
June	14.8	12.8	10.7
July	17.5	16.3	14.5
August	17.9	17.4	16.6
September	17	15.6	14.2
October	14.1	12.3	10.4
November	10.5	9.3	8.2
December	8.2	7	5.9

The hottest water temperature typically reached in August with around 63.5°F / 17.5°C. The coldest in March with an average water temperature of 37.2°F / 2.9°C.

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Portland 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. 18	Broken clouds	45 °F 41°F	7 °C 5°C	0mph (1km/h) south	0in (0mm) 0 %	90%
Nov. 19	Broken clouds	53 °F 38°F	12 °C 3°C	1mph (2km/h) east-northeast	0in (0mm) 10 %	86%
Nov. 20	Light shower rain	53 °F 44°F	12 °C 7°C	1mph (2km/h) south-southeast	0in (5mm) 70 %	95%
Nov. 21	Overcast clouds	52 °F 41°F	11 °C 5°C	1mph (1km/h) south-southeast	0in (0mm) 0 %	97%
Nov. 22	Light shower rain	55 °F 45°F	13 °C 7°C	2mph (3km/h) south-southwest	0in (4mm) 70 %	94%
Nov. 23	Light rain	54 °F 45°F	12 °C 7°C	2mph (3km/h) south	0in (9mm) 80 %	96%
Nov. 24	Broken clouds	52 °F 47°F	11 °C 8°C	2mph (3km/h) south-southwest	0in (1mm) 25 %	83%

+9-day forecast

Date	Weather	Max. F Min. F	Max. C Min. C	Windspeed Windir.	Precip. Rainrisk	Rel. Humidity
Nov. 25	Broken clouds	49 °F 44°F	9 °C 7°C	1mph (2km/h) south-southeast	0in (0mm) 0 %	79%
Nov. 26	Broken clouds	47 °F 41°F	8 °C 5°C	2mph (3km/h) southeast	0in (0mm) 0 %	77%
Nov. 27	Overcast clouds	47 °F 41°F	8 °C 5°C	2mph (4km/h) southeast	0in (0mm) 0 %	75%
Nov. 28	Overcast clouds	45 °F 41°F	7 °C 5°C	2mph (4km/h) southeast	0in (0mm) 0 %	77%
Nov. 29	Few clouds	48 °F 38°F	9 °C 3°C	0mph (0km/h) east-southeast	0in (0mm) 0 %	39%
Nov. 30	Scattered clouds	49 °F 39°F	10 °C 4°C	0mph (1km/h) east-northeast	0in (0mm) 0 %	54%
Dec. 01	Broken clouds	47 °F 38°F	8 °C 3°C	0mph (1km/h) north-northeast	-0in (-0mm) 0 %	78%
Dec. 02	Overcast clouds	52 °F 42°F	11 °C 6°C	0mph (0km/h) south-southeast	0in (0mm) 20 %	68%
Dec. 03	Moderate rain	51 °F 45°F	11 °C 7°C	1mph (1km/h) east	0in (12mm) 85 %	88%

Portland weather by month / climate table

°F

	Max. Temperature °F	ø. Temperature °F	Min. Temperature (°F)	Precip. (in)	Rainy Days (d)	Rel. Humidity (%)
January	35.8	24.1	12.6	1.7	1	69.8%
February	36	26.1	15.3	1.5	0	67.7%
March	45.7	32.7	21.6	0.1	1	67.8%
April	55	43.2	32.4	0.6	3	67.6%
May	66.2	53.1	42.1	0.6	1	73%
June	74.1	62.1	52	0.4	1	76%
July	77.2	69.3	62.2	0.4	0	75.3%
August	76.5	68.9	61.7	0.6	0	76%
September	73.4	63	54.9	0.2	0	75.9%
October	62.4	51.6	41	0	0	73.2%
November	54.9	41.7	32.7	0.3	0	71.5%
December	43	32	22.5	1.5	1	70.1%

°C

	Max. Temperature °C	ø. Temperature °C	Min. Temperature (°C)	Precip. (mm)	Rainy Days (d)	Rel. Humidity (%)
January	2.1	-4.4	-10.8	43.1	1	69.8%
February	2.2	-3.3	-9.3	36.9	0	67.7%
March	7.6	0.4	-5.8	3.8	1	67.8%
April	12.8	6.2	0.2	16.2	3	67.6%
May	19	11.7	5.6	16.4	1	73%
June	23.4	16.7	11.1	9.1	1	76%
July	25.1	20.7	16.8	9	0	75.3%
August	24.7	20.5	16.5	16.4	0	76%
September	23	17.2	12.7	5.6	0	75.9%
October	16.9	10.9	5	0	0	73.2%
November	12.7	5.4	0.4	8	0	71.5%
December	6.1	-0	-5.3	38.3	1	70.1%

October is the month with the lowest rain of 0in / 0mm and January with the highest precipitation in a year with 1.7in / 43.1mm. The avg. temperature is around 69.3°F / 20.7°C, July is the month with the highest temperature. January is the coolest with 24.1°F / -4.4°C average temperature.

Activities & POI in Portland

Type of Activity	List
Beach	East End Beach
Attraction	Portland Discovery Land and Sea Tours, East End Beach, Portland Observatory
Golf Course	South Portland Golf Course, Portland Country Club

Gulf of Maine