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

Current Water Temperature

56.3°F

Measurement Time: Monday, October 13, 2025, 4:45 AM EDT

Temperature Locations

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Local Points of Interest

St. Stephen, NB

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St. Croix River

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

Elevation Above Sea Level: 62 feet / 19 meters

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 (74.0 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

43.7°F
Sunny
Conditions: Sunny
Humidity: 82%
Feels Like: 38.5°F
Wind: ENE 9.2 mph
Wind Gusts: 11.2 mph
Pressure: 30.25 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 0.6

Five Day Weather Forecast

Sunny
Mon
H: 62°F
L: 41°F
Heavy rain
Tue
H: 51°F
L: 48°F
Heavy rain
Wed
H: 57°F
L: 45°F
Patchy rain nearby
Thu
H: 43°F
L: 38°F
Patchy rain nearby
Fri
H: 56°F
L: 40°F

Air Quality

AQI: 1 - Good
PM2.5: 2.34 μg/m3
PM10: 3.04 μg/m3
Carbon Monoxide: 143.84 μg/m3
Nitrogen Dioxide: 2.34 μg/m3
Sulphur Dioxide: 2.14 μg/m3
Ozone: 73 μg/m3

Astronomical

Sunrise: 6:43 AM
Sun Transit: 12:15 AM
Sunset: 5:47 PM
Daylight: 11 hrs 4 mins
Moonrise: 11:00 PM
Moon Transit: 6:12 AM
Moonset: 2:30 PM
Moon Phase: Last Quarter
Moon Illumination: 51.1%

Best Times for Fishing or Hunting

Major Periods

5:42 AM - 8:12 AM
9:20 PM - 11:50 PM

Minor Periods

12:00 AM - 12:00 AM
2:00 PM - 3:30 PM

Action Rating: 2 out of 5

High Surf Advisory issued October 13 at 1:51AM EDT until October 14 at 8:00PM EDT by NWS Caribou ME

Effective: Mon October 13, 2025, 1:51 AM
Expires: Mon October 13, 2025, 5:00 PM

* WHAT....Nearshore waves 4 to 8 feet, with a wave period of 10 to 12 seconds. High rip current risk. * WHERE...Coastal Hancock and Coastal Washington Counties. * WHEN...From 8 AM this morning to 8 PM EDT Tuesday. * IMPACTS...Rip currents and sneaker waves will lead to dangerous beach conditions. Waves crashing against rocks can splash violently upward and wash onlookers out to sea. Some minor beach erosion is possible..

A High Surf Advisory Means That High Surf Will Affect Beaches In The Advisory area...producing rip currents and localized beach erosion. If you plan to be along the shoreline, keep your distance from the water, and never turn your back on the ocean.
Monday, October 13, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 50.2°F
Average Humidity: 66%
Chance of Rain: 0%
Wind: 9.2 mph
UV Index: 0.6

Air Quality

AQI: 1 - Good
PM2.5: 2.32 μg/m3
PM10: 2.71 μg/m3
Carbon Monoxide: 149.36 μg/m3
Nitrogen Dioxide: 3.07 μg/m3
Sulphur Dioxide: 2.16 μg/m3
Ozone: 66.76 μg/m3

Astronomical

Sunrise: 6:43 AM
Sun Transit: 12:15 AM
Sunset: 5:47 PM
Daylight: 11 hrs 4 mins
Moonrise: 11:00 PM
Moon Transit: 6:12 AM
Moonset: 2:30 PM
Moon Phase: Last Quarter
Moon Illumination: 51.1%

Best Times for Fishing or Hunting

Major Periods

5:42 AM - 8:12 AM
9:20 PM - 11:50 PM

Minor Periods

12:00 AM - 12:00 AM
2:00 PM - 3:30 PM

Action Rating: 2 out of 5

Tuesday, October 14, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 49.7°F
Average Humidity: 85%
Chance of Rain: 88%
Wind: 4 mph
UV Index: 0.7

Air Quality

AQI: 1 - Good
PM2.5: 3.01 μg/m3
PM10: 3.49 μg/m3
Carbon Monoxide: 165.44 μg/m3
Nitrogen Dioxide: 4.4 μg/m3
Sulphur Dioxide: 3.67 μg/m3
Ozone: 63.08 μg/m3

Astronomical

Sunrise: 6:44 AM
Sun Transit: 12:15 AM
Sunset: 5:45 PM
Daylight: 11 hrs 1 mins
Moonrise: 12:00 AM
Moon Transit: 7:09 AM
Moonset: 3:04 PM
Moon Phase: Last Quarter
Moon Illumination: 39.8%

Best Times for Fishing or Hunting

Major Periods

6:39 AM - 9:09 AM
12:00 AM - 12:00 AM

Minor Periods

2:34 PM - 4:04 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, October 15, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 49.5°F
Average Humidity: 76%
Chance of Rain: 84%
Wind: 13.2 mph
UV Index: 0.5

Air Quality

AQI: 1 - Good
PM2.5: 2.86 μg/m3
PM10: 2.96 μg/m3
Carbon Monoxide: 168.64 μg/m3
Nitrogen Dioxide: 3.72 μg/m3
Sulphur Dioxide: 2.66 μg/m3
Ozone: 56.08 μg/m3

Astronomical

Sunrise: 6:46 AM
Sun Transit: 12:14 AM
Sunset: 5:43 PM
Daylight: 10 hrs 58 mins
Moonrise: 12:16 AM
Moon Transit: 8:01 AM
Moonset: 3:31 PM
Moon Phase: Last Quarter
Moon Illumination: 29.1%

Best Times for Fishing or Hunting

Major Periods

7:31 AM - 10:01 AM
12:00 AM - 12:00 AM

Minor Periods

3:01 PM - 4:31 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, October 16, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 41°F
Average Humidity: 82%
Chance of Rain: 87%
Wind: 12.5 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 1.74 μg/m3
PM10: 1.8 μg/m3
Carbon Monoxide: 141.12 μg/m3
Nitrogen Dioxide: 2.05 μg/m3
Sulphur Dioxide: 1.4 μg/m3
Ozone: 63.24 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 12:14 AM
Sunset: 5:42 PM
Daylight: 10 hrs 55 mins
Moonrise: 1:29 AM
Moon Transit: 8:48 AM
Moonset: 3:52 PM
Moon Phase: Last Quarter
Moon Illumination: 19.4%

Best Times for Fishing or Hunting

Major Periods

8:18 AM - 10:48 AM
12:00 AM - 12:00 AM

Minor Periods

3:22 PM - 4:52 PM
12:59 AM - 2:29 AM

Action Rating: 2 out of 5

Friday, October 17, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 46.5°F
Average Humidity: 74%
Chance of Rain: 78%
Wind: 11.4 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 1.65 μg/m3
PM10: 1.74 μg/m3
Carbon Monoxide: 136.23 μg/m3
Nitrogen Dioxide: 2.13 μg/m3
Sulphur Dioxide: 1.37 μg/m3
Ozone: 59.08 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 12:14 AM
Sunset: 5:40 PM
Daylight: 10 hrs 52 mins
Moonrise: 2:40 AM
Moon Transit: 9:31 AM
Moonset: 4:10 PM
Moon Phase: Waning Crescent
Moon Illumination: 11.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:01 AM - 11:31 AM

Minor Periods

3:40 PM - 5:10 PM
2:10 AM - 3:40 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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