Water Temperature of the St. Croix River in Calais, ME

Current Water Temperature

63.3°F

Measurement Time: Sunday, May 24, 2026, 2:45 PM EDT

Temperature Locations

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Local Points of Interest

St. Stephen, NB

St. Croix River

Station Name: St. Croix River at Milltown, Maine
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 62 feet

Nearest Address:
531 North St
Calais, ME 04619
Washington County

GPS Coordinates: 45.17, -67.2966667

Nearby Water Temperatures

Lewy Lake, Princeton, ME (14.2 mi)
Grand Lake Stream, Grand Lake Stream, ME (23.5 mi)
Gulf of Maine, Eastport, ME (23.9 mi)
Narraguagus River, Cherryfield, ME (49.8 mi)
Penobscot River, Eddington, ME (72.4 mi)
Meduxnekeag River, Houlton, ME (74 mi)
Piscataquis River, Guilford, ME (98.3 mi)
Ducktrap River, Lincolnville, ME (104.2 mi)
Sheepscot River, Whitefield, ME (130.4 mi)
Gulf of Maine, Monhegan, ME (142.9 mi)
Allagash River, Allagash, ME (156.6 mi)
St. John River, Saint Francis, ME (157.1 mi)
Gulf of Maine, Portland, ME (179.1 mi)
Gulf of Maine, Cape Elizabeth, ME (180.7 mi)
Wild River, Gilead, ME (188.5 mi)

Weather for Calais, Maine

Current Weather

59.5°F
Sunny
Sunny
59.5°F
58.9°F
36%
S 6 mph
9.2 mph
58.1°F
41.4°F
0 in
0%
6 mi
1032 mbar
0.2

Five Day Weather Forecast

Sunny
Sun
H: 70°F
L: 38°F
Heavy rain
Mon
H: 53°F
L: 48°F
Patchy rain nearby
Tue
H: 76°F
L: 46°F
Patchy rain nearby
Wed
H: 73°F
L: 52°F
Patchy rain nearby
Thu
H: 59°F
L: 42°F

Air Quality

AQI: 1 - Good
PM2.5: 5.74 μg/m3
PM10: 8.14 μg/m3
Carbon Monoxide: 117.84 μg/m3
Nitrogen Dioxide: 2.14 μg/m3
Sulphur Dioxide: 1.74 μg/m3
Ozone: 66 μg/m3

Astronomical

Sunrise: 4:51 AM
Sun Transit: 12:26 AM
Sunset: 8:02 PM
Daylight: 15 hrs 11 mins
Moonrise: 1:24 PM
Moon Transit: 7:47 PM
Moonset: 1:40 AM
Moon Phase: First Quarter
Moon Illumination: 55.7%

Best Times for Fishing or Hunting

Major Periods

10:03 AM - 12:33 AM
7:17 PM - 9:47 PM

Minor Periods

12:54 AM - 2:24 PM
1:10 AM - 2:40 AM

Action Rating: 2 out of 5

Special Weather Statement issued May 24 at 5:55AM EDT by NWS Caribou ME

Effective: Sun May 24, 2026, 5:55 AM
Expires: Sun May 24, 2026, 8:00 PM

* The warm air temperatures this weekend in the mid 60s to low 70s may cause people to underestimate the dangers of the cold water temperatures which are currently only around 50 degrees on Moosehead Lake and in the middle to upper 50s on smaller lakes and rivers. * The cold water temperatures can quickly cause hypothermia to anyone immersed in the water. According to the Maine Warden Service, when the water temperature is below 60 degrees, the average submerged person could lose dexterity within minutes and be unable to accomplish simple tasks. Anyone on small boats, canoes or kayaks should plan accordingly if recreating this weekend and use extreme caution to avoid this threat. Paddle smart from the start and always wear your life jacket!


Special Weather Statement issued May 24 at 5:55AM EDT by NWS Caribou ME

Effective: Sun May 24, 2026, 5:55 AM
Expires: Sun May 24, 2026, 8:00 PM

* The warm air temperatures this weekend in the mid 60s to low 70s may cause people to underestimate the dangers of the cold water temperatures which are currently only around 50 degrees on Moosehead Lake and in the middle to upper 50s on smaller lakes and rivers. * The cold water temperatures can quickly cause hypothermia to anyone immersed in the water. According to the Maine Warden Service, when the water temperature is below 60 degrees, the average submerged person could lose dexterity within minutes and be unable to accomplish simple tasks. Anyone on small boats, canoes or kayaks should plan accordingly if recreating this weekend and use extreme caution to avoid this threat. Paddle smart from the start and always wear your life jacket!


Sunday, May 24, 2026

Weather Forecast

Sunny
69.6°F
38.3°F
54.3°F
52%
0 in
0%
0%
11.4 mph
7.3


Air Quality

AQI: 1 - Good
PM2.5: 5.52 μg/m3
PM10: 6.53 μg/m3
Carbon Monoxide: 120.08 μg/m3
Nitrogen Dioxide: 2.02 μg/m3
Sulphur Dioxide: 1.6 μg/m3
Ozone: 68.76 μg/m3

Astronomical

Sunrise: 4:51 AM
Sun Transit: 12:26 AM
Sunset: 8:02 PM
Daylight: 15 hrs 11 mins
Moonrise: 1:24 PM
Moon Transit: 7:47 PM
Moonset: 1:40 AM
Moon Phase: First Quarter
Moon Illumination: 55.7%

Best Times for Fishing or Hunting

Major Periods

10:03 AM - 12:33 AM
7:17 PM - 9:47 PM

Minor Periods

12:54 AM - 2:24 PM
1:10 AM - 2:40 AM

Action Rating: 2 out of 5

Monday, May 25, 2026

Weather Forecast

Heavy rain
53.2°F
48.2°F
50.4°F
94%
0.99 in
91%
0%
14.1 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 4.05 μg/m3
PM10: 5.61 μg/m3
Carbon Monoxide: 116.24 μg/m3
Nitrogen Dioxide: 2.08 μg/m3
Sulphur Dioxide: 1.56 μg/m3
Ozone: 67.08 μg/m3

Astronomical

Sunrise: 4:50 AM
Sun Transit: 12:26 AM
Sunset: 8:03 PM
Daylight: 15 hrs 13 mins
Moonrise: 2:33 PM
Moon Transit: 8:29 PM
Moonset: 1:58 AM
Moon Phase: First Quarter
Moon Illumination: 66.7%

Best Times for Fishing or Hunting

Major Periods

10:45 AM - 1:15 PM
7:59 PM - 10:29 PM

Minor Periods

2:03 PM - 3:33 PM
1:28 AM - 2:58 AM

Action Rating: 3 out of 5

Tuesday, May 26, 2026

Weather Forecast

Patchy rain nearby
75.6°F
46.4°F
61.2°F
72%
0.01 in
83%
0%
10.1 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 2.79 μg/m3
PM10: 3.06 μg/m3
Carbon Monoxide: 130.44 μg/m3
Nitrogen Dioxide: 2.06 μg/m3
Sulphur Dioxide: 1.52 μg/m3
Ozone: 71.28 μg/m3

Astronomical

Sunrise: 4:49 AM
Sun Transit: 12:26 AM
Sunset: 8:04 PM
Daylight: 15 hrs 15 mins
Moonrise: 3:39 PM
Moon Transit: 9:11 PM
Moonset: 2:15 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.9%

Best Times for Fishing or Hunting

Major Periods

11:27 AM - 1:57 PM
8:41 PM - 11:11 PM

Minor Periods

3:09 PM - 4:39 PM
1:45 AM - 3:15 AM

Action Rating: 2 out of 5

Wednesday, May 27, 2026

Weather Forecast

Patchy rain nearby
72.7°F
51.8°F
61°F
72%
0.01 in
85%
0%
12.5 mph
7.1


Air Quality

AQI: 1 - Good
PM2.5: 5.27 μg/m3
PM10: 5.76 μg/m3
Carbon Monoxide: 121.98 μg/m3
Nitrogen Dioxide: 2.66 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 74 μg/m3

Astronomical

Sunrise: 4:49 AM
Sun Transit: 12:26 AM
Sunset: 8:05 PM
Daylight: 15 hrs 17 mins
Moonrise: 4:46 PM
Moon Transit: 9:54 PM
Moonset: 2:33 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.7%

Best Times for Fishing or Hunting

Major Periods

12:09 AM - 2:39 PM
9:24 PM - 11:54 PM

Minor Periods

4:16 PM - 5:46 PM
2:03 AM - 3:33 AM

Action Rating: 2 out of 5

Thursday, May 28, 2026

Weather Forecast

Patchy rain nearby
58.7°F
42.3°F
50.1°F
84%
0.04 in
89%
0%
10.7 mph
5.1


Air Quality

AQI: 1 - Good
PM2.5: 1.55 μg/m3
PM10: 1.58 μg/m3
Carbon Monoxide: 132.31 μg/m3
Nitrogen Dioxide: 2.13 μg/m3
Sulphur Dioxide: 1.46 μg/m3
Ozone: 65.77 μg/m3

Astronomical

Sunrise: 4:48 AM
Sun Transit: 12:26 AM
Sunset: 8:06 PM
Daylight: 15 hrs 18 mins
Moonrise: 5:53 PM
Moon Transit: 10:38 PM
Moonset: 2:53 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.7%

Best Times for Fishing or Hunting

Major Periods

12:53 AM - 3:23 PM
12:00 AM - 12:00 AM

Minor Periods

5:23 PM - 6:53 PM
2:23 AM - 3:53 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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