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

Current Water Temperature

36.1°F

Measurement Time: Monday, March 9, 2026, 8:45 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

53.8°F
Sunny
Sunny
50.4°F
55.8°F
43%
S 11.2 mph
14.3 mph
54.7°F
41.1°F
0 in
0%
6 mi
1013 mbar
2.8

Five Day Weather Forecast

Sunny
Mon
H: 60°F
L: 30°F
Fog
Tue
H: 43°F
L: 34°F
Moderate or heavy snow showers
Wed
H: 34°F
L: 28°F
Moderate rain
Thu
H: 45°F
L: 31°F
Patchy moderate snow
Fri
H: 36°F
L: 20°F

Air Quality

AQI: 1 - Good
PM2.5: 11.24 μg/m3
PM10: 15.44 μg/m3
Carbon Monoxide: 192.84 μg/m3
Nitrogen Dioxide: 4.94 μg/m3
Sulphur Dioxide: 2.24 μg/m3
Ozone: 89 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 12:39 AM
Sunset: 6:28 PM
Daylight: 11 hrs 35 mins
Moonrise: 12:31 AM
Moon Transit: 4:53 AM
Moonset: 9:09 AM
Moon Phase: Waning Gibbous
Moon Illumination: 58.5%

Best Times for Fishing or Hunting

Major Periods

4:23 AM - 6:53 AM
7:55 PM - 10:25 PM

Minor Periods

8:39 AM - 10:09 AM
12:01 AM - 1:31 AM

Action Rating: 3 out of 5

special weather statement in effect

Service Notice – February 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2026, changes are expected to include... 1) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard is tentatively set for Spring 2026 deployment. Data changes will appear in CAP following this deployment and 2) other minor improvements and corrections. For more information on these changes: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/ | Notification de service – février 2026: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2026, il y aura des changements incluant... 1) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique devrait être déployée provisoirement au printemps 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement et 2) d’autres améliorations et corrections mineures. Pour plus d’informations sur ces changements: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/

Effective: Mon March 9, 2026, 3:35 AM
Expires: Mon March 9, 2026, 7:35 PM

A combination of snow, ice pellets, freezing rain, and rain is expected. Time Span: Wednesday afternoon until Thursday afternoon Potential freezing rain duration: 10 to 18 hours. Potential freezing rain amounts: 5 to 15 mm, possibly higher. Remarks: A low pressure system is expected to bring a variety of wintry precipitation that will likely affect the region on Wednesday into Thursday. There still remains some uncertainty in the exact track of this system but the potential is increasing for a prolonged period of freezing rain with significant ice accumulations. A transition to rain is expected through Thursday morning. Accumulations of ice may create slippery and hazardous travel or walking conditions. Ice buildup on trees and utility infrastructure may cause damage or outages. Plan ahead in case schools or scheduled activities are cancelled. Consider adjusting travel plans to avoid the most adverse conditions. ### Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to NBstorm@ec.gc.ca or post reports on X using #NBStorm.


special weather statement in effect

Service Notice – February 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2026, changes are expected to include... 1) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard is tentatively set for Spring 2026 deployment. Data changes will appear in CAP following this deployment and 2) other minor improvements and corrections. For more information on these changes: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/ | Notification de service – février 2026: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2026, il y aura des changements incluant... 1) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique devrait être déployée provisoirement au printemps 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement et 2) d’autres améliorations et corrections mineures. Pour plus d’informations sur ces changements: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/

Effective: Mon March 9, 2026, 9:55 AM
Expires: Tue March 10, 2026, 1:55 AM

A combination of snow, ice pellets, freezing rain, and rain is expected. Time Span: Wednesday afternoon until Thursday afternoon Potential freezing rain duration: 10 to 18 hours. Potential freezing rain amounts: 5 to 15 mm, possibly higher. Remarks: A low pressure system is expected to bring a variety of wintry precipitation that will likely affect the region on Wednesday into Thursday. There still remains some uncertainty in the exact track of this system but the potential is increasing for a prolonged period of freezing rain with significant ice accumulations. A transition to rain is expected through Thursday morning. Accumulations of ice may create slippery and hazardous travel or walking conditions. Ice buildup on trees and utility infrastructure may cause damage or outages. Plan ahead in case schools or scheduled activities are cancelled. Consider adjusting travel plans to avoid the most adverse conditions. ### Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to NBstorm@ec.gc.ca or post reports on X using #NBStorm.


Monday, March 9, 2026

Weather Forecast

Sunny
60.4°F
30.4°F
43.5°F
67%
0 in
0%
0%
13.9 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 5.16 μg/m3
PM10: 6.54 μg/m3
Carbon Monoxide: 196.24 μg/m3
Nitrogen Dioxide: 4.42 μg/m3
Sulphur Dioxide: 1.88 μg/m3
Ozone: 80.4 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 12:39 AM
Sunset: 6:28 PM
Daylight: 11 hrs 35 mins
Moonrise: 12:31 AM
Moon Transit: 4:53 AM
Moonset: 9:09 AM
Moon Phase: Waning Gibbous
Moon Illumination: 58.5%

Best Times for Fishing or Hunting

Major Periods

4:23 AM - 6:53 AM
7:55 PM - 10:25 PM

Minor Periods

8:39 AM - 10:09 AM
12:01 AM - 1:31 AM

Action Rating: 3 out of 5

Tuesday, March 10, 2026

Weather Forecast

Fog
43.2°F
33.7°F
38.3°F
97%
0 in
0%
0%
7.4 mph
0.8


Air Quality

AQI: 1 - Good
PM2.5: 8.73 μg/m3
PM10: 10.42 μg/m3
Carbon Monoxide: 188 μg/m3
Nitrogen Dioxide: 6.04 μg/m3
Sulphur Dioxide: 3.6 μg/m3
Ozone: 83.6 μg/m3

Astronomical

Sunrise: 6:51 AM
Sun Transit: 12:39 AM
Sunset: 6:29 PM
Daylight: 11 hrs 38 mins
Moonrise: 1:36 AM
Moon Transit: 5:42 AM
Moonset: 9:44 AM
Moon Phase: Last Quarter
Moon Illumination: 47.2%

Best Times for Fishing or Hunting

Major Periods

5:12 AM - 7:42 AM
8:45 PM - 11:15 PM

Minor Periods

9:14 AM - 10:44 AM
1:06 AM - 2:36 AM

Action Rating: 2 out of 5

Wednesday, March 11, 2026

Weather Forecast

Moderate or heavy snow showers
33.5°F
27.7°F
31°F
91%
0.85 in
82%
34%
11.4 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 4.1 μg/m3
PM10: 4.98 μg/m3
Carbon Monoxide: 170.64 μg/m3
Nitrogen Dioxide: 3.78 μg/m3
Sulphur Dioxide: 1.78 μg/m3
Ozone: 83.88 μg/m3

Astronomical

Sunrise: 6:49 AM
Sun Transit: 12:39 AM
Sunset: 6:30 PM
Daylight: 11 hrs 41 mins
Moonrise: 2:37 AM
Moon Transit: 6:33 AM
Moonset: 10:29 AM
Moon Phase: Last Quarter
Moon Illumination: 36.0%

Best Times for Fishing or Hunting

Major Periods

6:03 AM - 8:33 AM
12:00 AM - 12:00 AM

Minor Periods

9:59 AM - 11:29 AM
2:07 AM - 3:37 AM

Action Rating: 2 out of 5

Thursday, March 12, 2026

Weather Forecast

Moderate rain
45.3°F
30.8°F
38.9°F
91%
0.45 in
88%
15%
11.9 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 5.73 μg/m3
PM10: 7.62 μg/m3
Carbon Monoxide: 133.64 μg/m3
Nitrogen Dioxide: 1.54 μg/m3
Sulphur Dioxide: 1.02 μg/m3
Ozone: 81.6 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 12:38 AM
Sunset: 6:32 PM
Daylight: 11 hrs 44 mins
Moonrise: 3:29 AM
Moon Transit: 7:25 AM
Moonset: 11:23 AM
Moon Phase: Last Quarter
Moon Illumination: 25.6%

Best Times for Fishing or Hunting

Major Periods

6:55 AM - 9:25 AM
12:00 AM - 12:00 AM

Minor Periods

10:53 AM - 12:23 AM
2:59 AM - 4:29 AM

Action Rating: 3 out of 5

Friday, March 13, 2026

Weather Forecast

Patchy moderate snow
35.9°F
20.2°F
28.4°F
58%
0.03 in
66%
27%
13.4 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 1.41 μg/m3
PM10: 1.54 μg/m3
Carbon Monoxide: 159.67 μg/m3
Nitrogen Dioxide: 2.21 μg/m3
Sulphur Dioxide: 1.41 μg/m3
Ozone: 74.77 μg/m3

Astronomical

Sunrise: 6:46 AM
Sun Transit: 12:38 AM
Sunset: 6:33 PM
Daylight: 11 hrs 47 mins
Moonrise: 4:13 AM
Moon Transit: 8:17 AM
Moonset: 12:26 AM
Moon Phase: Waning Crescent
Moon Illumination: 16.4%

Best Times for Fishing or Hunting

Major Periods

7:47 AM - 10:17 AM
12:00 AM - 12:00 AM

Minor Periods

11:56 AM - 1:26 PM
3:43 AM - 5:13 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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