Water Temperature of the Gulf of Maine in Portland, ME

Current Water Temperature

61.3°F

Measurement Time: Thursday, September 18, 2025, 9:18 AM EDT

Today's Tides

 Low: September 18, 3:02 AM, 0.28 ft
High: September 18, 9:16 AM, 8.77 ft
 Low: September 18, 3:14 PM, 0.96 ft
High: September 18, 9:32 PM, 9.91 ft

Temperature Locations

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Local Points of Interest

Fore River; Portland Harbor; Port of Portland; Bug Light Park; Fort Allen Park

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Gulf of Maine

Station Name: Portland
Data Source: NOAA Tides and Currents

Elevation Above Sea Level: 26 feet / 8 meters

Sensor Depth: -8.1 feet / -2.5 meters

Nearest Address:
98 Ocean Gateway Pier
Portland, ME 04101
Cumberland County

GPS Coordinates: 43.65806, -70.24417

Nearby Water Temperatures

Gulf of Maine, Cape Elizabeth, ME (10.6 mi)
Gulf of Maine, Monhegan, ME (44.6 mi)
Piscataqua River, Kittery, ME (47.1 mi)
Sheepscot River, Whitefield, ME (50.7 mi)
Gulf of Maine, Gloucester, NH (59.4 mi)
Wild River, Gilead, ME (62.4 mi)
Ducktrap River, Lincolnville, ME (74.9 mi)
Atlantic Ocean, Scituate, MA (93.0 mi)
Shawsheen River, Bedford, MA (97.3 mi)
Cambridge Reservoir Tributary 2, Lexington, MA (98.8 mi)
Cambridge Reservoir Tributary 1, Lexington, MA (98.9 mi)
Hobbs Brook, Lincoln, MA (99.0 mi)
Fresh Pond, Cambridge, MA (99.1 mi)
Cambridge Reservoir Tributary 3, Waltham, MA (99.7 mi)
Cambridge Reservoir, Lincoln, MA (99.9 mi)

Weather for Portland, Maine

Current Weather

64°F
Partly cloudy
Conditions: Partly cloudy
Humidity: 75%
Feels Like: 64°F
Wind: WSW 2.9 mph
Wind Gusts: 3.8 mph
Pressure: 29.97 in
Precipitation: 0 in
Cloud Cover: 50%
Visibility: 9 mi
UV Index: 0.9

Five Day Weather Forecast

Partly Cloudy
Thu
H: 70°F
L: 60°F
Sunny
Fri
H: 69°F
L: 57°F
Sunny
Sat
H: 66°F
L: 49°F
Sunny
Sun
H: 62°F
L: 49°F
Sunny
Mon
H: 66°F
L: 51°F

Air Quality

AQI: 1 - Good
PM2.5: 19.24 μg/m3
PM10: 26.09 μg/m3
Carbon Monoxide: 296 μg/m3
Nitrogen Dioxide: 4.44 μg/m3
Sulphur Dioxide: 2.96 μg/m3
Ozone: 102 μg/m3

Astronomical

Sunrise: 6:24 AM
Sun Transit: 12:34 AM
Sunset: 6:45 PM
Daylight: 12 hrs 21 mins
Moonrise: 2:43 AM
Moon Transit: 10:15 AM
Moonset: 5:34 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

12:04 AM - 2:34 AM
9:45 AM - 12:15 AM

Minor Periods

5:04 PM - 6:34 PM
2:13 AM - 3:43 AM

Action Rating: 3 out of 5

Thursday, September 18, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 62.6°F
Average Humidity: 93%
Chance of Rain: 0%
Wind: 9.2 mph
UV Index: 1.2

Air Quality

AQI: 2 - Moderate
PM2.5: 18.12 μg/m3
PM10: 24.52 μg/m3
Carbon Monoxide: 353.79 μg/m3
Nitrogen Dioxide: 11.1 μg/m3
Sulphur Dioxide: 2.08 μg/m3
Ozone: 72.92 μg/m3

Astronomical

Sunrise: 6:24 AM
Sun Transit: 12:34 AM
Sunset: 6:45 PM
Daylight: 12 hrs 21 mins
Moonrise: 2:43 AM
Moon Transit: 10:15 AM
Moonset: 5:34 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

12:04 AM - 2:34 AM
9:45 AM - 12:15 AM

Minor Periods

5:04 PM - 6:34 PM
2:13 AM - 3:43 AM

Action Rating: 3 out of 5

Friday, September 19, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 63.9°F
Average Humidity: 65%
Chance of Rain: 0%
Wind: 11.4 mph
UV Index: 1

Air Quality

AQI: 1 - Good
PM2.5: 8.41 μg/m3
PM10: 9.21 μg/m3
Carbon Monoxide: 340.92 μg/m3
Nitrogen Dioxide: 8.84 μg/m3
Sulphur Dioxide: 1.78 μg/m3
Ozone: 72.6 μg/m3

Astronomical

Sunrise: 6:25 AM
Sun Transit: 12:34 AM
Sunset: 6:44 PM
Daylight: 12 hrs 18 mins
Moonrise: 3:54 AM
Moon Transit: 11:01 AM
Moonset: 5:55 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.8%

Best Times for Fishing or Hunting

Major Periods

12:52 AM - 3:22 AM
10:31 AM - 1:01 PM

Minor Periods

5:25 PM - 6:55 PM
3:24 AM - 4:54 AM

Action Rating: 3 out of 5

Saturday, September 20, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 56.7°F
Average Humidity: 56%
Chance of Rain: 0%
Wind: 10.7 mph
UV Index: 1.3

Air Quality

AQI: 1 - Good
PM2.5: 2.84 μg/m3
PM10: 3.04 μg/m3
Carbon Monoxide: 270.69 μg/m3
Nitrogen Dioxide: 5.74 μg/m3
Sulphur Dioxide: 1.51 μg/m3
Ozone: 67.88 μg/m3

Astronomical

Sunrise: 6:27 AM
Sun Transit: 12:34 AM
Sunset: 6:42 PM
Daylight: 12 hrs 15 mins
Moonrise: 5:03 AM
Moon Transit: 11:45 AM
Moonset: 6:14 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

1:36 AM - 4:06 AM
11:15 AM - 1:45 PM

Minor Periods

5:44 PM - 7:14 PM
4:33 AM - 6:03 AM

Action Rating: 3 out of 5

Sunday, September 21, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 56.4°F
Average Humidity: 58%
Chance of Rain: 0%
Wind: 9.6 mph
UV Index: 1.2

Air Quality

AQI: 1 - Good
PM2.5: 9.17 μg/m3
PM10: 10.49 μg/m3
Carbon Monoxide: 303.18 μg/m3
Nitrogen Dioxide: 13.89 μg/m3
Sulphur Dioxide: 2.95 μg/m3
Ozone: 70.08 μg/m3

Astronomical

Sunrise: 6:28 AM
Sun Transit: 12:33 AM
Sunset: 6:40 PM
Daylight: 12 hrs 12 mins
Moonrise: 6:10 AM
Moon Transit: 12:26 AM
Moonset: 6:32 PM
Moon Phase: New
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

2:18 AM - 4:48 AM
11:56 AM - 2:26 PM

Minor Periods

6:02 PM - 7:32 PM
5:40 AM - 7:10 AM

Action Rating: 3 out of 5

Monday, September 22, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 58.5°F
Average Humidity: 68%
Chance of Rain: 0%
Wind: 12.1 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 6.56 μg/m3
PM10: 8.33 μg/m3
Carbon Monoxide: 311.08 μg/m3
Nitrogen Dioxide: 13.68 μg/m3
Sulphur Dioxide: 2.79 μg/m3
Ozone: 55.38 μg/m3

Astronomical

Sunrise: 6:29 AM
Sun Transit: 12:33 AM
Sunset: 6:38 PM
Daylight: 12 hrs 9 mins
Moonrise: 7:14 AM
Moon Transit: 1:07 PM
Moonset: 6:49 PM
Moon Phase: New
Moon Illumination: 2.9%

Best Times for Fishing or Hunting

Major Periods

2:59 AM - 5:29 AM
12:37 AM - 3:07 PM

Minor Periods

6:19 PM - 7:49 PM
6:44 AM - 8:14 AM

Action Rating: 5 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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