Water Temperature of the Gulf of Maine in Portland, ME

Current Water Temperature

61.5°F

Measurement Time: Tuesday, June 30, 2026, 6:06 AM EDT

Today's Tides

Low: June 30, 6:22 AM, 0.4 ft
 High: June 30, 12:35 PM, 8.3 ft
Low: June 30, 6:16 PM, 1.6 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

61°F
Sunny
Sunny
61°F
61°F
90%
WSW 5.4 mph
11.3 mph
61°F
55.8°F
0 in
25%
9 mi
1020 mbar
0.2

Five Day Weather Forecast

Sunny
Tue
H: 75°F
L: 61°F
Sunny
Wed
H: 87°F
L: 71°F
Sunny
Thu
H: 88°F
L: 71°F
Sunny
Fri
H: 91°F
L: 66°F
Sunny
Sat
H: 86°F
L: 70°F

Air Quality

AQI: 1 - Good
PM2.5: 17.6 μg/m3
PM10: 18 μg/m3
Carbon Monoxide: 155 μg/m3
Nitrogen Dioxide: 5.7 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 53 μg/m3

Astronomical

Sunrise: 5:03 AM
Sun Transit: 12:44 AM
Sunset: 8:27 PM
Daylight: 15 hrs 24 mins
Moonrise: 9:24 PM
Moon Transit: 12:55 AM
Moonset: 5:09 AM
Moon Phase: Full
Moon Illumination: 98.6%

Best Times for Fishing or Hunting

Major Periods

12:25 AM - 2:55 AM
3:34 PM - 6:04 PM

Minor Periods

8:54 PM - 10:24 PM
4:39 AM - 6:09 AM

Action Rating: 5 out of 5

Extreme Heat Watch issued June 29 at 2:24PM EDT until July 3 at 8:00PM EDT by NWS Gray ME

Effective: Mon June 29, 2026, 2:24 PM
Expires: Tue June 30, 2026, 4:30 AM

* WHAT...Dangerously hot conditions with heat index values up to 110 possible. * WHERE...Portions of south central, southwest, and western Maine and central, northern, and southern New Hampshire. * WHEN...From Wednesday afternoon through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...Overnight low temperatures will only fall into the 70s, resulting in accumulated heat stress.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.


Extreme Heat Watch issued June 30 at 2:15AM EDT until July 3 at 8:00PM EDT by NWS Gray ME

Effective: Tue June 30, 2026, 2:15 AM
Expires: Tue June 30, 2026, 2:15 PM

* WHAT...Dangerously hot conditions with heat index values up to 110 possible. * WHERE...Portions of south central, southwest, and western Maine and central, northern, and southern New Hampshire. * WHEN...From Wednesday afternoon through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...Overnight low temperatures will only fall into the 70s, resulting in accumulated heat stress.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.
Tuesday, June 30, 2026

Weather Forecast

Sunny
74.9°F
60.6°F
68.7°F
78%
0 in
9%
0%
16.1 mph
7.8


Air Quality

AQI: 2 - Moderate
PM2.5: 16.02 μg/m3
PM10: 17.15 μg/m3
Carbon Monoxide: 151.46 μg/m3
Nitrogen Dioxide: 4.33 μg/m3
Sulphur Dioxide: 0.63 μg/m3
Ozone: 88.75 μg/m3

Astronomical

Sunrise: 5:03 AM
Sun Transit: 12:44 AM
Sunset: 8:27 PM
Daylight: 15 hrs 24 mins
Moonrise: 9:24 PM
Moon Transit: 12:55 AM
Moonset: 5:09 AM
Moon Phase: Full
Moon Illumination: 98.6%

Best Times for Fishing or Hunting

Major Periods

12:25 AM - 2:55 AM
3:34 PM - 6:04 PM

Minor Periods

8:54 PM - 10:24 PM
4:39 AM - 6:09 AM

Action Rating: 5 out of 5

Wednesday, July 1, 2026

Weather Forecast

Sunny
87.2°F
71.4°F
76.9°F
78%
0.32 in
71%
0%
14.3 mph
7.4


Air Quality

AQI: 1 - Good
PM2.5: 11.55 μg/m3
PM10: 12.69 μg/m3
Carbon Monoxide: 150.29 μg/m3
Nitrogen Dioxide: 3.69 μg/m3
Sulphur Dioxide: 0.85 μg/m3
Ozone: 106.88 μg/m3

Astronomical

Sunrise: 5:03 AM
Sun Transit: 12:44 AM
Sunset: 8:27 PM
Daylight: 15 hrs 23 mins
Moonrise: 9:55 PM
Moon Transit: 1:45 AM
Moonset: 6:13 AM
Moon Phase: Full
Moon Illumination: 94.7%

Best Times for Fishing or Hunting

Major Periods

1:15 AM - 3:45 AM
4:23 PM - 6:53 PM

Minor Periods

9:25 PM - 10:55 PM
5:43 AM - 7:13 AM

Action Rating: 3 out of 5

Thursday, July 2, 2026

Weather Forecast

Sunny
87.7°F
71.2°F
79.7°F
73%
0.05 in
57%
0%
8.1 mph
7.9


Air Quality

AQI: 1 - Good
PM2.5: 14.3 μg/m3
PM10: 16.89 μg/m3
Carbon Monoxide: 153.33 μg/m3
Nitrogen Dioxide: 2.49 μg/m3
Sulphur Dioxide: 0.89 μg/m3
Ozone: 99.96 μg/m3

Astronomical

Sunrise: 5:04 AM
Sun Transit: 12:45 AM
Sunset: 8:26 PM
Daylight: 15 hrs 23 mins
Moonrise: 10:21 PM
Moon Transit: 2:33 AM
Moonset: 7:19 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.5%

Best Times for Fishing or Hunting

Major Periods

2:03 AM - 4:33 AM
5:09 PM - 7:39 PM

Minor Periods

9:51 PM - 11:21 PM
6:49 AM - 8:19 AM

Action Rating: 2 out of 5

Friday, July 3, 2026

Weather Forecast

Sunny
91°F
66°F
76.9°F
69%
0 in
17%
0%
11 mph
8.5


Air Quality

AQI: 1 - Good
PM2.5: 8.49 μg/m3
PM10: 9.62 μg/m3
Carbon Monoxide: 166.4 μg/m3
Nitrogen Dioxide: 2.06 μg/m3
Sulphur Dioxide: 0.77 μg/m3
Ozone: 96.21 μg/m3

Astronomical

Sunrise: 5:04 AM
Sun Transit: 12:45 AM
Sunset: 8:26 PM
Daylight: 15 hrs 22 mins
Moonrise: 10:43 PM
Moon Transit: 3:19 AM
Moonset: 8:27 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.3%

Best Times for Fishing or Hunting

Major Periods

2:49 AM - 5:19 AM
5:54 PM - 8:24 PM

Minor Periods

10:13 PM - 11:43 PM
7:57 AM - 9:27 AM

Action Rating: 4 out of 5

Saturday, July 4, 2026

Weather Forecast

Sunny
86.4°F
70.4°F
77.5°F
62%
0.04 in
39%
0%
9.6 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 10.28 μg/m3
PM10: 10.96 μg/m3
Carbon Monoxide: 228.22 μg/m3
Nitrogen Dioxide: 6.09 μg/m3
Sulphur Dioxide: 0.46 μg/m3
Ozone: 55.78 μg/m3

Astronomical

Sunrise: 5:05 AM
Sun Transit: 12:45 AM
Sunset: 8:26 PM
Daylight: 15 hrs 21 mins
Moonrise: 11:02 PM
Moon Transit: 4:02 AM
Moonset: 9:33 AM
Moon Phase: Waning Gibbous
Moon Illumination: 70.6%

Best Times for Fishing or Hunting

Major Periods

3:32 AM - 6:02 AM
6:37 PM - 9:07 PM

Minor Periods

12:00 AM - 12:00 AM
9:03 AM - 10:33 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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