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

Current Water Temperature

34.2°F

Measurement Time: Sunday, March 22, 2026, 5:45 AM 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

28°F
Sunny
Sunny
26.1°F
30.5°F
50%
NE 2.2 mph
6.7 mph
29.6°F
17.6°F
0 in
0%
6 mi
1017 mbar
1.7

Five Day Weather Forecast

Moderate or heavy snow showers
Sun
H: 33°F
L: 23°F
Light freezing rain
Mon
H: 35°F
L: 24°F
Cloudy
Tue
H: 41°F
L: 24°F
Partly Cloudy
Wed
H: 43°F
L: 30°F
Moderate rain
Thu
H: 40°F
L: 30°F

Air Quality

AQI: 1 - Good
PM2.5: 3.04 μg/m3
PM10: 4.04 μg/m3
Carbon Monoxide: 188.84 μg/m3
Nitrogen Dioxide: 1.84 μg/m3
Sulphur Dioxide: 1.34 μg/m3
Ozone: 97 μg/m3

Astronomical

Sunrise: 6:29 AM
Sun Transit: 12:00 AM
Sunset: 6:45 PM
Daylight: 12 hrs 16 mins
Moonrise: 7:50 AM
Moon Transit: 3:42 PM
Moonset: 11:50 PM
Moon Phase: Waxing Crescent
Moon Illumination: 14.9%

Best Times for Fishing or Hunting

Major Periods

5:52 AM - 8:22 AM
3:12 PM - 5:42 PM

Minor Periods

12:00 AM - 12:00 AM
7:20 AM - 8:50 AM

Action Rating: 2 out of 5

Winter Weather Advisory issued March 22 at 1:26AM EDT until March 23 at 4:00AM EDT by NWS Caribou ME

Effective: Sun March 22, 2026, 1:26 AM
Expires: Sun March 22, 2026, 4:00 PM

* WHAT...Snow expected. Total snow accumulations between 3 and 6 inches. * WHERE...Portions of Central Highlands, Coastal DownEast, Far Eastern, Interior DownEast, and Penobscot Valley Maine * WHEN...From 8 AM this morning to 4 AM EDT Monday. * IMPACTS...Plan on slippery road conditions.

A Winter Weather Advisory for snow means periods of snow will cause primarily travel difficulties. Expect snow covered roads and limited visibilities, and use caution while driving. The latest road conditions for Maine can be obtained by going to newengland511.org.


Winter Weather Advisory issued March 22 at 2:45AM EDT until March 23 at 4:00AM EDT by NWS Caribou ME

Effective: Sun March 22, 2026, 2:45 AM
Expires: Sun March 22, 2026, 2:45 PM

* WHAT...Snow expected. Total snow accumulations between 3 and 6 inches. * WHERE...Portions of Central Highlands, Coastal DownEast, Far Eastern, Interior DownEast, and Penobscot Valley Maine * WHEN...From 8 AM this morning to 4 AM EDT Monday. * IMPACTS...Plan on slippery road conditions.

A Winter Weather Advisory for snow means periods of snow will cause primarily travel difficulties. Expect snow covered roads and limited visibilities, and use caution while driving. The latest road conditions for Maine can be obtained by going to newengland511.org.
Sunday, March 22, 2026

Weather Forecast

Moderate or heavy snow showers
33.1°F
23°F
28.1°F
79%
0.3 in
80%
46%
10.7 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 3.94 μg/m3
PM10: 4.88 μg/m3
Carbon Monoxide: 196.12 μg/m3
Nitrogen Dioxide: 2.49 μg/m3
Sulphur Dioxide: 1.67 μg/m3
Ozone: 95.8 μg/m3

Astronomical

Sunrise: 6:29 AM
Sun Transit: 12:00 AM
Sunset: 6:45 PM
Daylight: 12 hrs 16 mins
Moonrise: 7:50 AM
Moon Transit: 3:42 PM
Moonset: 11:50 PM
Moon Phase: Waxing Crescent
Moon Illumination: 14.9%

Best Times for Fishing or Hunting

Major Periods

5:52 AM - 8:22 AM
3:12 PM - 5:42 PM

Minor Periods

12:00 AM - 12:00 AM
7:20 AM - 8:50 AM

Action Rating: 2 out of 5

Monday, March 23, 2026

Weather Forecast

Light freezing rain
35.4°F
24.4°F
29.3°F
67%
0.01 in
76%
4%
13.2 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 3.48 μg/m3
PM10: 4.37 μg/m3
Carbon Monoxide: 172.92 μg/m3
Nitrogen Dioxide: 2.54 μg/m3
Sulphur Dioxide: 1.83 μg/m3
Ozone: 97.84 μg/m3

Astronomical

Sunrise: 6:27 AM
Sun Transit: 12:00 AM
Sunset: 6:46 PM
Daylight: 12 hrs 19 mins
Moonrise: 8:27 AM
Moon Transit: 4:42 PM
Moonset: 12:50 AM
Moon Phase: Waxing Crescent
Moon Illumination: 23.8%

Best Times for Fishing or Hunting

Major Periods

6:51 AM - 9:21 AM
4:12 PM - 6:42 PM

Minor Periods

7:57 AM - 9:27 AM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Tuesday, March 24, 2026

Weather Forecast

Cloudy
41.4°F
23.7°F
31.8°F
45%
0 in
0%
0%
10.3 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 3.95 μg/m3
PM10: 5.4 μg/m3
Carbon Monoxide: 171.12 μg/m3
Nitrogen Dioxide: 1.8 μg/m3
Sulphur Dioxide: 1.28 μg/m3
Ozone: 96.08 μg/m3

Astronomical

Sunrise: 6:25 AM
Sun Transit: 12:00 AM
Sunset: 6:47 PM
Daylight: 12 hrs 22 mins
Moonrise: 9:15 AM
Moon Transit: 5:45 PM
Moonset: 1:09 AM
Moon Phase: Waxing Crescent
Moon Illumination: 34.0%

Best Times for Fishing or Hunting

Major Periods

7:53 AM - 10:23 AM
5:15 PM - 7:45 PM

Minor Periods

8:45 AM - 10:15 AM
12:39 AM - 2:09 AM

Action Rating: 2 out of 5

Wednesday, March 25, 2026

Weather Forecast

Partly Cloudy
42.8°F
29.8°F
34.6°F
58%
0 in
0%
0%
15 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 3.51 μg/m3
PM10: 4.46 μg/m3
Carbon Monoxide: 176 μg/m3
Nitrogen Dioxide: 2.63 μg/m3
Sulphur Dioxide: 1.42 μg/m3
Ozone: 99.2 μg/m3

Astronomical

Sunrise: 6:23 AM
Sun Transit: 12:00 AM
Sunset: 6:48 PM
Daylight: 12 hrs 25 mins
Moonrise: 10:17 AM
Moon Transit: 6:47 PM
Moonset: 2:18 AM
Moon Phase: First Quarter
Moon Illumination: 45.1%

Best Times for Fishing or Hunting

Major Periods

8:56 AM - 11:26 AM
6:17 PM - 8:47 PM

Minor Periods

9:47 AM - 11:17 AM
1:48 AM - 3:18 AM

Action Rating: 2 out of 5

Thursday, March 26, 2026

Weather Forecast

Moderate rain
40.1°F
30.3°F
35.8°F
98%
0.45 in
82%
20%
11 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 1.94 μg/m3
PM10: 2.38 μg/m3
Carbon Monoxide: 170.07 μg/m3
Nitrogen Dioxide: 2.01 μg/m3
Sulphur Dioxide: 1.32 μg/m3
Ozone: 95.08 μg/m3

Astronomical

Sunrise: 6:21 AM
Sun Transit: 12:00 AM
Sunset: 6:50 PM
Daylight: 12 hrs 29 mins
Moonrise: 11:29 AM
Moon Transit: 7:47 PM
Moonset: 3:12 AM
Moon Phase: First Quarter
Moon Illumination: 56.4%

Best Times for Fishing or Hunting

Major Periods

9:57 AM - 12:27 AM
7:17 PM - 9:47 PM

Minor Periods

10:59 AM - 12:29 AM
2:42 AM - 4:12 AM

Action Rating: 3 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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