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

Current Water Temperature

48.4°F 9.1°C
Frigid Dangerously Cold
48.4°F
Frigid < 50°F
Cold 50°–60°
Cool 60°–70°
Comfortable 70°–80°
Warm 80°+

Severe hypothermia and cold water shock risk. Unprotected swimming causes rapid loss of dexterity in under 5 minutes.

Measurement Time: Monday, November 9, 2026, 5:45 PM EST

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

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

34.7°F
Clear
Conditions: Clear
Humidity: 83%
Feels Like: 29.3°F
Wind: WNW 6 mph
Wind Gusts: 14.9 mph
Pressure: 29.7 in
Precipitation: 0 in
Cloud Cover: 8%
Visibility: 6 mi
UV Index: 0

Weather Forecast

Overcast
Mon
H: 49°F
L: 34°F
Sunny
Tue
H: 46°F
L: 31°F
Patchy rain nearby
Wed
H: 44°F
L: 29°F

Air Quality

EPA Index 1 • Good

Air quality is satisfactory, and air pollution poses little or no risk.

PM2.5
2.6 μg/m³
Good
PM10
3.2 μg/m³
Good
Ozone (O3)
63 μg/m³
Photochemical
NO2
1.3 μg/m³
Nitrogen Dioxide
SO2
0.7 μg/m³
Sulfur Dioxide
CO
119 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 47m daylight
Sunrise 6:19 AM
Solar Noon 11:13 AM
Sunset 4:06 PM
Moon
New • 2%
Moonrise 6:55 AM
Transit 11:25 AM
Moonset 3:49 PM

Best Times for Fishing or Hunting

Major Periods

10:55 AM - 1:25 PM
11:20 PM - 1:50 AM

Minor Periods

6:25 AM - 7:55 AM
3:19 PM - 4:49 PM
Action Rating:
Very Good 4/5
Monday, November 9, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 41.3°F
Average Humidity: 83%
Chance of Rain: 25%
Wind: 10.1 mph
UV Index: 1.2

Astronomical

Sun
9h 47m daylight
Sunrise 6:19 AM
Solar Noon 11:13 AM
Sunset 4:06 PM
Moon
New • 2%
Moonrise 6:55 AM
Transit 11:25 AM
Moonset 3:49 PM

Best Times for Fishing or Hunting

Major Periods

10:55 AM - 1:25 PM
11:20 PM - 1:50 AM

Minor Periods

6:25 AM - 7:55 AM
3:19 PM - 4:49 PM
Action Rating:
Very Good 4/5
Tuesday, November 10, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 38.1°F
Average Humidity: 79%
Chance of Rain: 23%
Wind: 9.6 mph
UV Index: 1.7

Astronomical

Sun
9h 44m daylight
Sunrise 6:21 AM
Solar Noon 11:13 AM
Sunset 4:05 PM
Moon
New • 0%
Moonrise 8:02 AM
Transit 12:15 PM
Moonset 4:24 PM

Best Times for Fishing or Hunting

Major Periods

12:10 AM - 2:40 AM
11:45 AM - 2:15 PM

Minor Periods

7:32 AM - 9:02 AM
3:54 PM - 5:24 PM
Action Rating:
Very Good 4/5
Wednesday, November 11, 2026

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 38.7°F
Average Humidity: 81%
Chance of Rain: 60%
Wind: 11.4 mph
UV Index: 1

Astronomical

Sun
9h 42m daylight
Sunrise 6:22 AM
Solar Noon 11:13 AM
Sunset 4:04 PM
Moon
New • 2%
Moonrise 9:04 AM
Transit 1:06 PM
Moonset 5:07 PM

Best Times for Fishing or Hunting

Major Periods

12:10 AM - 2:40 AM
12:36 PM - 3:06 PM

Minor Periods

8:34 AM - 10:04 AM
4:37 PM - 6:07 PM
Action Rating:
Good Action 3/5
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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