Water Temperature of the Cal-Sag Channel in Blue Island, IL

Current Water Temperature

32.0°F

Measurement Time: Wednesday, July 29, 2026, 5:27 AM CDT

Temperature Locations

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Local Points of Interest

Calumet-Saganashkee Channel; Little Calumet River

Cal-Sag Channel

Station Name: CALUMET SAG CHANNEL AT BLUE ISLAND, IL
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 597 feet

Nearest Address:
13198 Division St
Blue Island, IL 60406
Cook County

GPS Coordinates: 41.65281186, -87.670326

Nearby Water Temperatures

Grand Calumet River, Chicago, IL (5.6 mi)
Grand Calumet River, Hammond, IN (9.1 mi)
Indiana Harbor Canal, East Chicago, IN (10.4 mi)
Hart Ditch, Munster, IN (11.7 mi)
Chicago River, Chicago, IL (12.8 mi)
Plum Creek, Dyer, IN (13 mi)
Little Calumet River, Gary, IN (15.1 mi)
Lake Michigan, Chicago, IL (17.4 mi)
Chicago Sanitary and Ship Canal, Romeoville, IL (20.1 mi)
Deep River, Lake Station, IN (20.3 mi)
Des Plaines River, Lockport, IL (21.8 mi)
Des Plaines River, Joliet, IL (22.8 mi)
Des Plaines River, Rockdale, IL (24.9 mi)
Des Plaines River, Channahon, IL (32.6 mi)
Lake Michigan, Wilmette, IL (33.3 mi)

Weather for Blue Island, Illinois

Current Weather

73.4°F
Partly cloudy
Partly cloudy
77°F
76.6°F
61%
NNE 8.9 mph
10.3 mph
72.5°F
63.2°F
0 in
25%
10 mi
994 mbar
4.8

Five Day Weather Forecast

Sunny
Wed
H: 79°F
L: 62°F
Sunny
Thu
H: 87°F
L: 64°F
Sunny
Fri
H: 73°F
L: 64°F
Patchy rain nearby
Sat
H: 73°F
L: 64°F
Patchy rain nearby
Sun
H: 74°F
L: 63°F

Air Quality

AQI: 1 - Good
PM2.5: 4.2 μg/m3
PM10: 4.3 μg/m3
Carbon Monoxide: 123 μg/m3
Nitrogen Dioxide: 4.7 μg/m3
Sulphur Dioxide: 2.1 μg/m3
Ozone: 67 μg/m3

Astronomical

Sunrise: 5:42 AM
Sun Transit: 12:57 AM
Sunset: 8:12 PM
Daylight: 14 hrs 30 mins
Moonrise: 8:31 PM
Moon Transit: 12:42 AM
Moonset: 5:29 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:12 AM - 2:42 AM
12:55 AM - 3:25 PM

Minor Periods

8:01 PM - 9:31 PM
4:59 AM - 6:29 AM

Action Rating: 4 out of 5

Small Craft Advisory issued July 28 at 9:42PM CDT until July 29 at 7:00AM CDT by NWS Chicago IL

Effective: Tue July 28, 2026, 9:42 PM
Expires: Wed July 29, 2026, 5:45 AM

* WHAT...North winds to 25 kt and significant waves to 7 ft occasionally to 9 ft. * WHERE...Illinois and Indiana nearshore from Winthrop Harbor IL to Michigan City IN. * WHEN...Until 7 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.


Small Craft Advisory issued July 29 at 1:58AM CDT until July 29 at 7:00AM CDT by NWS Chicago IL

Effective: Wed July 29, 2026, 1:58 AM
Expires: Wed July 29, 2026, 7:00 AM

* WHAT...Significant waves to 7 ft occasionally to 9 ft. * WHERE...Illinois and Indiana nearshore from Winthrop Harbor IL to Michigan City IN. * WHEN...Until 7 AM CDT this morning. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.


Small Craft Advisory issued July 29 at 6:54AM CDT until July 29 at 7:00AM CDT by NWS Chicago IL

Effective: Wed July 29, 2026, 6:54 AM
Expires: Wed July 29, 2026, 8:00 AM

Waves are no longer hazardous to smaller boats.
Wednesday, July 29, 2026

Weather Forecast

Sunny
79.3°F
61.7°F
70.1°F
74%
0 in
7%
0%
9.2 mph
8.7


Air Quality

AQI: 1 - Good
PM2.5: 5.11 μg/m3
PM10: 5.2 μg/m3
Carbon Monoxide: 131.83 μg/m3
Nitrogen Dioxide: 8.39 μg/m3
Sulphur Dioxide: 1.78 μg/m3
Ozone: 64.88 μg/m3

Astronomical

Sunrise: 5:42 AM
Sun Transit: 12:57 AM
Sunset: 8:12 PM
Daylight: 14 hrs 30 mins
Moonrise: 8:31 PM
Moon Transit: 12:42 AM
Moonset: 5:29 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:12 AM - 2:42 AM
12:55 AM - 3:25 PM

Minor Periods

8:01 PM - 9:31 PM
4:59 AM - 6:29 AM

Action Rating: 4 out of 5

Thursday, July 30, 2026

Weather Forecast

Sunny
86.6°F
63.9°F
75.2°F
50%
0 in
2%
0%
7.6 mph
7.7


Air Quality

AQI: 1 - Good
PM2.5: 15.1 μg/m3
PM10: 15.32 μg/m3
Carbon Monoxide: 216.75 μg/m3
Nitrogen Dioxide: 24.08 μg/m3
Sulphur Dioxide: 3.65 μg/m3
Ozone: 74.38 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 12:57 AM
Sunset: 8:11 PM
Daylight: 14 hrs 28 mins
Moonrise: 8:55 PM
Moon Transit: 1:28 AM
Moonset: 6:36 AM
Moon Phase: Full
Moon Illumination: 97.1%

Best Times for Fishing or Hunting

Major Periods

12:58 AM - 3:28 AM
1:40 PM - 4:10 PM

Minor Periods

8:25 PM - 9:55 PM
6:06 AM - 7:36 AM

Action Rating: 5 out of 5

Friday, July 31, 2026

Weather Forecast

Sunny
72.7°F
64°F
68.6°F
83%
0.22 in
77%
0%
10.1 mph
2.6


Air Quality

AQI: 1 - Good
PM2.5: 9.63 μg/m3
PM10: 9.83 μg/m3
Carbon Monoxide: 175.04 μg/m3
Nitrogen Dioxide: 18.43 μg/m3
Sulphur Dioxide: 4.18 μg/m3
Ozone: 71.67 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 12:57 AM
Sunset: 8:10 PM
Daylight: 14 hrs 25 mins
Moonrise: 9:17 PM
Moon Transit: 2:13 AM
Moonset: 7:41 AM
Moon Phase: Full
Moon Illumination: 92.0%

Best Times for Fishing or Hunting

Major Periods

1:43 AM - 4:13 AM
2:24 PM - 4:54 PM

Minor Periods

8:47 PM - 10:17 PM
7:11 AM - 8:41 AM

Action Rating: 3 out of 5

Saturday, August 1, 2026

Weather Forecast

Patchy rain nearby
72.6°F
64.3°F
66.5°F
89%
0.53 in
88%
0%
10.7 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 8.97 μg/m3
PM10: 9.21 μg/m3
Carbon Monoxide: 164.99 μg/m3
Nitrogen Dioxide: 13.23 μg/m3
Sulphur Dioxide: 3.27 μg/m3
Ozone: 80.83 μg/m3

Astronomical

Sunrise: 5:45 AM
Sun Transit: 12:57 AM
Sunset: 8:08 PM
Daylight: 14 hrs 23 mins
Moonrise: 9:37 PM
Moon Transit: 2:56 AM
Moonset: 8:47 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.9%

Best Times for Fishing or Hunting

Major Periods

2:26 AM - 4:56 AM
3:07 PM - 5:37 PM

Minor Periods

9:07 PM - 10:37 PM
8:17 AM - 9:47 AM

Action Rating: 2 out of 5

Sunday, August 2, 2026

Weather Forecast

Patchy rain nearby
73.6°F
63.3°F
67.7°F
81%
0.01 in
29%
0%
10.7 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 8.1 μg/m3
PM10: 8.23 μg/m3
Carbon Monoxide: 250.5 μg/m3
Nitrogen Dioxide: 6.78 μg/m3
Sulphur Dioxide: 1.76 μg/m3
Ozone: 81.5 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 12:56 AM
Sunset: 8:07 PM
Daylight: 14 hrs 21 mins
Moonrise: 9:58 PM
Moon Transit: 3:39 AM
Moonset: 9:53 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

3:09 AM - 5:39 AM
5:20 PM - 7:50 PM

Minor Periods

9:28 PM - 10:58 PM
9:23 AM - 10:53 AM

Action Rating: 4 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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