Water Temperature of the Gulf of Maine in Portland, ME

Current Water Temperature

48.0°F

Measurement Time: Sunday, May 10, 2026, 12:12 PM EDT

Today's Tides

 High: May 10, 5:43 AM, 8.7 ft
Low: May 10, 12:06 PM, 1.1 ft
 High: May 10, 6:30 PM, 8.3 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

55°F
Overcast
Overcast
53.4°F
53.5°F
89%
S 6.5 mph
10.4 mph
51.7°F
51.2°F
0 in
100%
9 mi
1013 mbar
3.8

Five Day Weather Forecast

Patchy rain nearby
Sun
H: 58°F
L: 46°F
Partly Cloudy
Mon
H: 56°F
L: 46°F
Sunny
Tue
H: 55°F
L: 42°F
Patchy rain nearby
Wed
H: 55°F
L: 44°F
Moderate rain
Thu
H: 55°F
L: 48°F

Air Quality

AQI: 1 - Good
PM2.5: 11.95 μg/m3
PM10: 13.55 μg/m3
Carbon Monoxide: 170.85 μg/m3
Nitrogen Dioxide: 4.75 μg/m3
Sulphur Dioxide: 1.75 μg/m3
Ozone: 103 μg/m3

Astronomical

Sunrise: 5:21 AM
Sun Transit: 12:37 AM
Sunset: 7:54 PM
Daylight: 14 hrs 33 mins
Moonrise: 2:13 AM
Moon Transit: 7:24 AM
Moonset: 12:46 AM
Moon Phase: Last Quarter
Moon Illumination: 26.2%

Best Times for Fishing or Hunting

Major Periods

6:54 AM - 9:24 AM
12:00 AM - 12:00 AM

Minor Periods

12:16 AM - 1:46 PM
1:43 AM - 3:13 AM

Action Rating: 2 out of 5

Special Weather Statement issued May 10 at 2:36AM EDT by NWS Gray ME

Effective: Sun May 10, 2026, 2:36 AM
Expires: Sun May 10, 2026, 11:00 AM

* The warm air temperatures today into the middle 60s to near 70 degrees may cause people to underestimate the dangers of the cold water temperatures, which are currently only in the upper 40s across Sebago Lake and Lake Winnipesaukee, and in the upper 40s in the regions smaller lakes and rivers. * The cold water temperatures can quickly cause hypothermia to anyone immersed in the water. According to the US Coast Guard, when the water temperatures are below 50 degrees, the chance of immediate incapacitation due to cold shock is extremely high. Anyone on small boats, canoes, or kayaks should plan accordingly if recreating and use extreme caution to avoid this threat. Paddle smart from the start and always wear your life jacket! * Strong winds are also expected with gusts up to 25 mph from the southwest. If boating on large bodies of water, these strong winds can increase the likelihood of overturning your boat, canoe, or kayak due to increased wave heights.


Sunday, May 10, 2026

Weather Forecast

Patchy rain nearby
58.1°F
45.7°F
50.5°F
94%
0.13 in
70%
0%
13.2 mph
5.4


Air Quality

AQI: 1 - Good
PM2.5: 7.66 μg/m3
PM10: 8.95 μg/m3
Carbon Monoxide: 152.05 μg/m3
Nitrogen Dioxide: 5.51 μg/m3
Sulphur Dioxide: 1.89 μg/m3
Ozone: 98.08 μg/m3

Astronomical

Sunrise: 5:21 AM
Sun Transit: 12:37 AM
Sunset: 7:54 PM
Daylight: 14 hrs 33 mins
Moonrise: 2:13 AM
Moon Transit: 7:24 AM
Moonset: 12:46 AM
Moon Phase: Last Quarter
Moon Illumination: 26.2%

Best Times for Fishing or Hunting

Major Periods

6:54 AM - 9:24 AM
12:00 AM - 12:00 AM

Minor Periods

12:16 AM - 1:46 PM
1:43 AM - 3:13 AM

Action Rating: 2 out of 5

Monday, May 11, 2026

Weather Forecast

Partly Cloudy
56.4°F
46°F
50.9°F
66%
0 in
0%
0%
9.4 mph
2


Air Quality

AQI: 1 - Good
PM2.5: 5.13 μg/m3
PM10: 5.51 μg/m3
Carbon Monoxide: 174.81 μg/m3
Nitrogen Dioxide: 4.86 μg/m3
Sulphur Dioxide: 1.5 μg/m3
Ozone: 78.48 μg/m3

Astronomical

Sunrise: 5:20 AM
Sun Transit: 12:37 AM
Sunset: 7:55 PM
Daylight: 14 hrs 35 mins
Moonrise: 2:34 AM
Moon Transit: 8:09 AM
Moonset: 1:55 PM
Moon Phase: Last Quarter
Moon Illumination: 16.9%

Best Times for Fishing or Hunting

Major Periods

7:39 AM - 10:09 AM
12:00 AM - 12:00 AM

Minor Periods

1:25 PM - 2:55 PM
2:04 AM - 3:34 AM

Action Rating: 2 out of 5

Tuesday, May 12, 2026

Weather Forecast

Sunny
55°F
42.2°F
49.4°F
56%
0 in
0%
0%
9.6 mph
1.1


Air Quality

AQI: 1 - Good
PM2.5: 2.44 μg/m3
PM10: 2.56 μg/m3
Carbon Monoxide: 163.57 μg/m3
Nitrogen Dioxide: 3.65 μg/m3
Sulphur Dioxide: 1.49 μg/m3
Ozone: 70.04 μg/m3

Astronomical

Sunrise: 5:19 AM
Sun Transit: 12:37 AM
Sunset: 7:56 PM
Daylight: 14 hrs 37 mins
Moonrise: 2:54 AM
Moon Transit: 8:53 AM
Moonset: 3:07 PM
Moon Phase: Waning Crescent
Moon Illumination: 9.3%

Best Times for Fishing or Hunting

Major Periods

8:23 AM - 10:53 AM
9:11 PM - 11:41 PM

Minor Periods

2:37 PM - 4:07 PM
2:24 AM - 3:54 AM

Action Rating: 2 out of 5

Wednesday, May 13, 2026

Weather Forecast

Patchy rain nearby
55.2°F
44.2°F
49.5°F
66%
0.01 in
89%
0%
23 mph
2


Air Quality

AQI: 1 - Good
PM2.5: 6.8 μg/m3
PM10: 7.79 μg/m3
Carbon Monoxide: 148.56 μg/m3
Nitrogen Dioxide: 6.24 μg/m3
Sulphur Dioxide: 1.66 μg/m3
Ozone: 66.72 μg/m3

Astronomical

Sunrise: 5:18 AM
Sun Transit: 12:37 AM
Sunset: 7:57 PM
Daylight: 14 hrs 40 mins
Moonrise: 3:14 AM
Moon Transit: 12:00 AM
Moonset: 4:21 PM
Moon Phase: Waning Crescent
Moon Illumination: 3.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

3:51 PM - 5:21 PM
2:44 AM - 4:14 AM

Action Rating: 2 out of 5

Thursday, May 14, 2026

Weather Forecast

Moderate rain
54.6°F
48.4°F
49.9°F
95%
0.78 in
83%
0%
18.6 mph
2


Air Quality

AQI: 1 - Good
PM2.5: 5.93 μg/m3
PM10: 8.19 μg/m3
Carbon Monoxide: 135.95 μg/m3
Nitrogen Dioxide: 3 μg/m3
Sulphur Dioxide: 1.48 μg/m3
Ozone: 85.54 μg/m3

Astronomical

Sunrise: 5:17 AM
Sun Transit: 12:37 AM
Sunset: 7:58 PM
Daylight: 14 hrs 42 mins
Moonrise: 3:36 AM
Moon Transit: 10:29 AM
Moonset: 5:39 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

12:18 AM - 2:48 AM
9:59 AM - 12:29 AM

Minor Periods

5:09 PM - 6:39 PM
3:06 AM - 4:36 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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