Water Temperature of the Gulf of Maine in Portland, ME

Current Water Temperature

52.3°F

Measurement Time: Sunday, May 31, 2026, 2:12 AM EDT

Today's Tides

Low: May 31, 6:05 AM, 0.2 ft
 High: May 31, 12:18 PM, 8.5 ft
Low: May 31, 6:02 PM, 1.5 ft

Temperature Locations

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Local Points of Interest

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

Gulf of Maine

Station Name: Portland
Data Source: NOAA Tides and Currents

Elevation Above Sea Level: 26 feet

Sensor Depth: -8 feet

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 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 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

44.7°F
Clear
Clear
41.8°F
44.7°F
82%
NW 5.6 mph
10.8 mph
41.8°F
39.4°F
0 in
0%
6 mi
1016 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Sun
H: 63°F
L: 44°F
Patchy rain nearby
Mon
H: 57°F
L: 48°F
Sunny
Tue
H: 63°F
L: 48°F
Sunny
Wed
H: 67°F
L: 52°F
Sunny
Thu
H: 65°F
L: 54°F

Air Quality

AQI: 1 - Good
PM2.5: 3.95 μg/m3
PM10: 4.05 μg/m3
Carbon Monoxide: 109.85 μg/m3
Nitrogen Dioxide: 8.75 μg/m3
Sulphur Dioxide: 1.55 μg/m3
Ozone: 46 μg/m3

Astronomical

Sunrise: 5:03 AM
Sun Transit: 12:38 AM
Sunset: 8:15 PM
Daylight: 15 hrs 12 mins
Moonrise: 9:10 PM
Moon Transit: 12:26 AM
Moonset: 4:39 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:05 PM - 5:35 PM

Minor Periods

8:40 PM - 10:10 PM
4:09 AM - 5:39 AM

Action Rating: 4 out of 5

Frost Advisory issued May 30 at 2:10PM EDT until May 31 at 7:00AM EDT by NWS Gray ME

Effective: Sat May 30, 2026, 2:10 PM
Expires: Sun May 31, 2026, 2:15 AM

* WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...In Maine, Central Somerset, Interior Cumberland Highlands, Northern Franklin, Northern Oxford, and Southern Oxford Counties. In New Hampshire, Northern Carroll, Northern Coos, Northern Grafton, and Southern Coos Counties. * WHEN...From 10 PM this evening to 7 AM EDT Sunday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.


Frost Advisory issued May 30 at 8:02PM EDT until May 31 at 7:00AM EDT by NWS Gray ME

Effective: Sat May 30, 2026, 8:02 PM
Expires: Sun May 31, 2026, 7:00 AM

* WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...In Maine, Central Somerset, Interior Cumberland Highlands, Northern Franklin, Northern Oxford, and Southern Oxford Counties. In New Hampshire, Northern Carroll, Northern Coos, Northern Grafton, and Southern Coos Counties. * WHEN...Until 7 AM EDT Sunday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.
Sunday, May 31, 2026

Weather Forecast

Patchy rain nearby
63°F
43.5°F
50.7°F
80%
0.09 in
92%
0%
6 mph
5.6


Air Quality

AQI: 1 - Good
PM2.5: 4.79 μg/m3
PM10: 5.8 μg/m3
Carbon Monoxide: 113.71 μg/m3
Nitrogen Dioxide: 4.88 μg/m3
Sulphur Dioxide: 1.4 μg/m3
Ozone: 65.42 μg/m3

Astronomical

Sunrise: 5:03 AM
Sun Transit: 12:38 AM
Sunset: 8:15 PM
Daylight: 15 hrs 12 mins
Moonrise: 9:10 PM
Moon Transit: 12:26 AM
Moonset: 4:39 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:05 PM - 5:35 PM

Minor Periods

8:40 PM - 10:10 PM
4:09 AM - 5:39 AM

Action Rating: 4 out of 5

Monday, June 1, 2026

Weather Forecast

Patchy rain nearby
56.8°F
48.3°F
51.1°F
79%
0.07 in
89%
0%
11 mph
6.4


Air Quality

AQI: 1 - Good
PM2.5: 6.92 μg/m3
PM10: 7.84 μg/m3
Carbon Monoxide: 133.25 μg/m3
Nitrogen Dioxide: 5.8 μg/m3
Sulphur Dioxide: 0.57 μg/m3
Ozone: 68.5 μg/m3

Astronomical

Sunrise: 5:02 AM
Sun Transit: 12:38 AM
Sunset: 8:16 PM
Daylight: 15 hrs 14 mins
Moonrise: 10:03 PM
Moon Transit: 1:17 AM
Moonset: 5:23 AM
Moon Phase: Full
Moon Illumination: 96.8%

Best Times for Fishing or Hunting

Major Periods

12:47 AM - 3:17 AM
3:56 PM - 6:26 PM

Minor Periods

9:33 PM - 11:03 PM
4:53 AM - 6:23 AM

Action Rating: 4 out of 5

Tuesday, June 2, 2026

Weather Forecast

Sunny
62.8°F
47.8°F
55.9°F
70%
0 in
0%
0%
8.9 mph
6.6


Air Quality

AQI: 1 - Good
PM2.5: 5.74 μg/m3
PM10: 7.33 μg/m3
Carbon Monoxide: 149.14 μg/m3
Nitrogen Dioxide: 4.39 μg/m3
Sulphur Dioxide: 0.56 μg/m3
Ozone: 72.08 μg/m3

Astronomical

Sunrise: 5:02 AM
Sun Transit: 12:39 AM
Sunset: 8:17 PM
Daylight: 15 hrs 15 mins
Moonrise: 10:47 PM
Moon Transit: 2:08 AM
Moonset: 6:17 AM
Moon Phase: Full
Moon Illumination: 91.7%

Best Times for Fishing or Hunting

Major Periods

1:38 AM - 4:08 AM
4:48 PM - 7:18 PM

Minor Periods

10:17 PM - 11:47 PM
5:47 AM - 7:17 AM

Action Rating: 3 out of 5

Wednesday, June 3, 2026

Weather Forecast

Sunny
67.2°F
52.3°F
60.1°F
59%
0 in
0%
0%
10.7 mph
7.6


Air Quality

AQI: 1 - Good
PM2.5: 6.7 μg/m3
PM10: 8.96 μg/m3
Carbon Monoxide: 150.58 μg/m3
Nitrogen Dioxide: 2.61 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 81.29 μg/m3

Astronomical

Sunrise: 5:01 AM
Sun Transit: 12:39 AM
Sunset: 8:18 PM
Daylight: 15 hrs 16 mins
Moonrise: 11:22 PM
Moon Transit: 3:00 AM
Moonset: 7:16 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.4%

Best Times for Fishing or Hunting

Major Periods

2:30 AM - 5:00 AM
5:37 PM - 8:07 PM

Minor Periods

12:00 AM - 12:00 AM
6:46 AM - 8:16 AM

Action Rating: 4 out of 5

Thursday, June 4, 2026

Weather Forecast

Sunny
65.2°F
54.2°F
59.1°F
69%
0 in
0%
0%
11.9 mph
1.6


Air Quality

AQI: 1 - Good
PM2.5: 8.07 μg/m3
PM10: 8.9 μg/m3
Carbon Monoxide: 198.33 μg/m3
Nitrogen Dioxide: 8.03 μg/m3
Sulphur Dioxide: 0.76 μg/m3
Ozone: 62.22 μg/m3

Astronomical

Sunrise: 5:01 AM
Sun Transit: 12:39 AM
Sunset: 8:18 PM
Daylight: 15 hrs 17 mins
Moonrise: 12:22 AM
Moon Transit: 3:48 AM
Moonset: 8:21 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.3%

Best Times for Fishing or Hunting

Major Periods

3:18 AM - 5:48 AM
6:25 PM - 8:55 PM

Minor Periods

7:51 AM - 9:21 AM
12:00 AM - 12:00 AM

Action Rating: 2 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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