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

Current Water Temperature

32.0°F

Measurement Time: Tuesday, July 21, 2026, 7:44 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

88.5°F
Partly cloudy
Partly cloudy
90.5°F
98.1°F
59%
WNW 12.5 mph
14.4 mph
93°F
67.2°F
0 in
50%
8 mi
1006 mbar
7.7

Five Day Weather Forecast

Sunny
Tue
H: 93°F
L: 70°F
Sunny
Wed
H: 74°F
L: 57°F
Sunny
Thu
H: 81°F
L: 59°F
Sunny
Fri
H: 81°F
L: 64°F
Sunny
Sat
H: 80°F
L: 62°F

Air Quality

AQI: 1 - Good
PM2.5: 7.7 μg/m3
PM10: 7.7 μg/m3
Carbon Monoxide: 136 μg/m3
Nitrogen Dioxide: 2.9 μg/m3
Sulphur Dioxide: 1.8 μg/m3
Ozone: 109 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 12:57 AM
Sunset: 8:19 PM
Daylight: 14 hrs 45 mins
Moonrise: 1:50 PM
Moon Transit: 6:56 PM
Moonset: 12:31 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

6:23 AM - 8:53 AM
6:26 PM - 8:56 PM

Minor Periods

1:20 PM - 2:50 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Beach Hazards Statement issued July 21 at 2:33AM CDT until July 23 at 7:00AM CDT by NWS Chicago IL

Effective: Tue July 21, 2026, 2:33 AM
Expires: Tue July 21, 2026, 10:45 AM

* WHAT...High wave action and dangerous currents at Lake Michigan beaches expected. * WHERE...Lake IN and Porter Counties. * WHEN...From this evening through Thursday morning. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers.

Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures.


Beach Hazards Statement issued July 21 at 9:48AM CDT until July 23 at 7:00AM CDT by NWS Chicago IL

Effective: Tue July 21, 2026, 9:48 AM
Expires: Tue July 21, 2026, 6:00 PM

* WHAT...High wave action and dangerous currents at Lake Michigan beaches expected. * WHERE...Lake IN and Porter Counties. * WHEN...From this evening through Thursday morning. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers.

Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures.


Small Craft Advisory issued July 21 at 2:29AM CDT until July 23 at 4:00AM CDT by NWS Chicago IL

Effective: Tue July 21, 2026, 2:29 AM
Expires: Tue July 21, 2026, 10:30 AM

* WHAT...West winds to 25 kt today becoming north winds to 25 kt this evening with significant waves to 10 ft occasionally to 13 ft on Wednesday expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...Until 4 AM CDT Thursday. * 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 21 at 9:47AM CDT until July 23 at 4:00AM CDT by NWS Chicago IL

Effective: Tue July 21, 2026, 9:47 AM
Expires: Tue July 21, 2026, 6:00 PM

* WHAT...West winds to 20 kt today becoming north winds to 25 kt this evening with significant waves to 10 ft occasionally to 13 ft on Wednesday expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...Until 4 AM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Tuesday, July 21, 2026

Weather Forecast

Sunny
93°F
69.6°F
79.6°F
65%
0 in
7%
0%
14.3 mph
8.2


Air Quality

AQI: 1 - Good
PM2.5: 5.51 μg/m3
PM10: 5.66 μg/m3
Carbon Monoxide: 153.21 μg/m3
Nitrogen Dioxide: 5.69 μg/m3
Sulphur Dioxide: 1.55 μg/m3
Ozone: 88.08 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 12:57 AM
Sunset: 8:19 PM
Daylight: 14 hrs 45 mins
Moonrise: 1:50 PM
Moon Transit: 6:56 PM
Moonset: 12:31 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

6:23 AM - 8:53 AM
6:26 PM - 8:56 PM

Minor Periods

1:20 PM - 2:50 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, July 22, 2026

Weather Forecast

Sunny
74.4°F
57°F
66.1°F
52%
0 in
4%
0%
11 mph
8.9


Air Quality

AQI: 1 - Good
PM2.5: 5.51 μg/m3
PM10: 5.68 μg/m3
Carbon Monoxide: 132.58 μg/m3
Nitrogen Dioxide: 5.32 μg/m3
Sulphur Dioxide: 1.61 μg/m3
Ozone: 84.25 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 12:57 AM
Sunset: 8:18 PM
Daylight: 14 hrs 43 mins
Moonrise: 2:56 PM
Moon Transit: 7:42 PM
Moonset: 12:55 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

7:08 AM - 9:38 AM
7:12 PM - 9:42 PM

Minor Periods

2:26 PM - 3:56 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, July 23, 2026

Weather Forecast

Sunny
80.5°F
58.7°F
69.8°F
51%
0 in
5%
0%
5.1 mph
9


Air Quality

AQI: 1 - Good
PM2.5: 7.85 μg/m3
PM10: 8.08 μg/m3
Carbon Monoxide: 139.33 μg/m3
Nitrogen Dioxide: 14.32 μg/m3
Sulphur Dioxide: 4.86 μg/m3
Ozone: 72 μg/m3

Astronomical

Sunrise: 5:36 AM
Sun Transit: 12:57 AM
Sunset: 8:18 PM
Daylight: 14 hrs 41 mins
Moonrise: 3:59 PM
Moon Transit: 8:30 PM
Moonset: 12:24 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

7:55 AM - 10:25 AM
8:00 PM - 10:30 PM

Minor Periods

3:29 PM - 4:59 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Friday, July 24, 2026

Weather Forecast

Sunny
81.2°F
63.5°F
72.4°F
52%
0 in
2%
0%
7.8 mph
8.8


Air Quality

AQI: 1 - Good
PM2.5: 7.61 μg/m3
PM10: 7.87 μg/m3
Carbon Monoxide: 170.92 μg/m3
Nitrogen Dioxide: 14.4 μg/m3
Sulphur Dioxide: 3.93 μg/m3
Ozone: 79.63 μg/m3

Astronomical

Sunrise: 5:37 AM
Sun Transit: 12:57 AM
Sunset: 8:17 PM
Daylight: 14 hrs 39 mins
Moonrise: 5:01 PM
Moon Transit: 9:20 PM
Moonset: 12:57 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

8:44 AM - 11:14 AM
8:50 PM - 11:20 PM

Minor Periods

4:31 PM - 6:01 PM
12:27 AM - 1:57 AM

Action Rating: 2 out of 5

Saturday, July 25, 2026

Weather Forecast

Sunny
79.9°F
62.4°F
70.9°F
76%
0 in
19%
0%
10.1 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 11.44 μg/m3
PM10: 11.68 μg/m3
Carbon Monoxide: 241.25 μg/m3
Nitrogen Dioxide: 28.05 μg/m3
Sulphur Dioxide: 5.9 μg/m3
Ozone: 46.75 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 12:57 AM
Sunset: 8:16 PM
Daylight: 14 hrs 38 mins
Moonrise: 5:57 PM
Moon Transit: 10:11 PM
Moonset: 1:37 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.2%

Best Times for Fishing or Hunting

Major Periods

9:35 AM - 12:05 AM
12:00 AM - 12:00 AM

Minor Periods

5:27 PM - 6:57 PM
1:07 AM - 2:37 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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