Water Temperature of Cambridge Reservoir Tributary 3 in Waltham, MA

Current Water Temperature

42.1°F

Measurement Time: Thursday, February 5, 2026, 4:30 PM EST

Temperature Locations

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Local Points of Interest

Hobbs Brook Basin

Cambridge Reservoir Tributary 3

Station Name: CAMBRIDGE RES., UNNAMED TRIB 3, NR LEXINGTON, MA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 197 feet

Nearest Address:
170 Data Dr
Waltham, MA 02451
Middlesex County

GPS Coordinates: 42.4198177, -71.2575565

Nearby Water Temperatures

Cambridge Reservoir, Lincoln, MA (0.7 mi)
Cambridge Reservoir Tributary 2, Lexington, MA (1.1 mi)
Cambridge Reservoir Tributary 1, Lexington, MA (1.2 mi)
Hobbs Brook, Lincoln, MA (1.3 mi)
Stony Brook, Waltham, MA (1.7 mi)
Stony Brook, Weston, MA (2.9 mi)
Stony Brook Tributary, Waltham, MA (3.3 mi)
Shawsheen River, Bedford, MA (3.3 mi)
Stony Brook Tributary, Weston, MA (3.5 mi)
Stony Brook, Weston, MA (3.6 mi)
Stony Brook Reservoir Tributary, Weston, MA (4.5 mi)
Fresh Pond, Cambridge, MA (6.2 mi)
Nashua River, Clinton, MA (20.8 mi)
Gates Brook, West Boylston, MA (26.7 mi)
Stillwater River, Sterling, MA (27.2 mi)

Weather for Waltham, Massachusetts

Current Weather

10°F
Clear
Clear
2.6°F
10.9°F
73%
NNW 4 mph
8.5 mph
5.9°F
-6.9°F
0 in
0%
9 mi
1014 mbar
0

Five Day Weather Forecast

Sunny
Thu
H: 31°F
L: 1°F
Patchy moderate snow
Fri
H: 28°F
L: 3°F
Moderate snow
Sat
H: 30°F
L: 6°F
Sunny
Sun
H: 16°F
L: -3°F
Sunny
Mon
H: 22°F
L: -6°F

Air Quality

AQI: 1 - Good
PM2.5: 12.25 μg/m3
PM10: 13.45 μg/m3
Carbon Monoxide: 236.85 μg/m3
Nitrogen Dioxide: 21.35 μg/m3
Sulphur Dioxide: 2.25 μg/m3
Ozone: 56 μg/m3

Astronomical

Sunrise: 6:54 AM
Sun Transit: 12:00 AM
Sunset: 5:04 PM
Daylight: 10 hrs 10 mins
Moonrise: 9:31 PM
Moon Transit: 2:36 AM
Moonset: 8:36 AM
Moon Phase: Waning Gibbous
Moon Illumination: 83.4%

Best Times for Fishing or Hunting

Major Periods

2:06 AM - 4:36 AM
5:02 PM - 7:32 PM

Minor Periods

9:01 PM - 10:31 PM
8:06 AM - 9:36 AM

Action Rating: 3 out of 5

Extreme Cold Watch issued February 5 at 12:13PM EST until February 8 at 1:00PM EST by NWS Boston/Norton MA

Effective: Thu February 5, 2026, 12:13 PM
Expires: Fri February 6, 2026, 5:00 AM

* WHAT...Dangerously cold wind chills as low as 25 to 30 below zero possible. * WHERE...All of western and central Massachusetts. * WHEN...From Saturday evening through Sunday afternoon. * IMPACTS...The dangerously cold wind chills as low as 25 to 30 below zero could cause frostbite on exposed skin in as little as 30 minutes.

Dress in layers including a hat, face mask, and gloves if you must go outside.
Thursday, February 5, 2026

Weather Forecast

Sunny
30.6°F
1°F
15.5°F
59%
0 in
0%
0%
6.9 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 13.39 μg/m3
PM10: 14.01 μg/m3
Carbon Monoxide: 263.21 μg/m3
Nitrogen Dioxide: 30.02 μg/m3
Sulphur Dioxide: 3.46 μg/m3
Ozone: 51.12 μg/m3

Astronomical

Sunrise: 6:54 AM
Sun Transit: 12:00 AM
Sunset: 5:04 PM
Daylight: 10 hrs 10 mins
Moonrise: 9:31 PM
Moon Transit: 2:36 AM
Moonset: 8:36 AM
Moon Phase: Waning Gibbous
Moon Illumination: 83.4%

Best Times for Fishing or Hunting

Major Periods

2:06 AM - 4:36 AM
5:02 PM - 7:32 PM

Minor Periods

9:01 PM - 10:31 PM
8:06 AM - 9:36 AM

Action Rating: 3 out of 5

Friday, February 6, 2026

Weather Forecast

Patchy moderate snow
28°F
3°F
17.6°F
75%
0.03 in
61%
21%
5.1 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 13.09 μg/m3
PM10: 14.11 μg/m3
Carbon Monoxide: 302.13 μg/m3
Nitrogen Dioxide: 32.24 μg/m3
Sulphur Dioxide: 3.58 μg/m3
Ozone: 48.36 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 12:00 AM
Sunset: 5:06 PM
Daylight: 10 hrs 12 mins
Moonrise: 10:37 PM
Moon Transit: 3:18 AM
Moonset: 8:56 AM
Moon Phase: Waning Gibbous
Moon Illumination: 74.1%

Best Times for Fishing or Hunting

Major Periods

2:48 AM - 5:18 AM
5:44 PM - 8:14 PM

Minor Periods

10:07 PM - 11:37 PM
8:26 AM - 9:56 AM

Action Rating: 2 out of 5

Saturday, February 7, 2026

Weather Forecast

Moderate snow
29.5°F
6.4°F
21.8°F
87%
0.46 in
75%
28%
15 mph
0.2


Air Quality

AQI: 2 - Moderate
PM2.5: 32.38 μg/m3
PM10: 33.4 μg/m3
Carbon Monoxide: 419.25 μg/m3
Nitrogen Dioxide: 52.05 μg/m3
Sulphur Dioxide: 5.91 μg/m3
Ozone: 26 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:00 AM
Sunset: 5:07 PM
Daylight: 10 hrs 15 mins
Moonrise: 11:42 PM
Moon Transit: 4:01 AM
Moonset: 9:16 AM
Moon Phase: Waning Gibbous
Moon Illumination: 63.7%

Best Times for Fishing or Hunting

Major Periods

3:31 AM - 6:01 AM
6:27 PM - 8:57 PM

Minor Periods

12:00 AM - 12:00 AM
8:46 AM - 10:16 AM

Action Rating: 2 out of 5

Sunday, February 8, 2026

Weather Forecast

Sunny
15.8°F
-2.9°F
5.9°F
59%
0 in
0%
0%
14.3 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 3.84 μg/m3
PM10: 4.05 μg/m3
Carbon Monoxide: 179.42 μg/m3
Nitrogen Dioxide: 8.99 μg/m3
Sulphur Dioxide: 2.32 μg/m3
Ozone: 64.4 μg/m3

Astronomical

Sunrise: 6:51 AM
Sun Transit: 12:00 AM
Sunset: 5:08 PM
Daylight: 10 hrs 17 mins
Moonrise: 12:42 AM
Moon Transit: 4:44 AM
Moonset: 9:39 AM
Moon Phase: Last Quarter
Moon Illumination: 52.5%

Best Times for Fishing or Hunting

Major Periods

4:14 AM - 6:44 AM
7:11 PM - 9:41 PM

Minor Periods

9:09 AM - 10:39 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Monday, February 9, 2026

Weather Forecast

Sunny
22.4°F
-6.1°F
7.6°F
81%
0 in
0%
0%
10.7 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 4.03 μg/m3
PM10: 4.28 μg/m3
Carbon Monoxide: 192.06 μg/m3
Nitrogen Dioxide: 11.73 μg/m3
Sulphur Dioxide: 2.14 μg/m3
Ozone: 61.31 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 12:00 AM
Sunset: 5:09 PM
Daylight: 10 hrs 20 mins
Moonrise: 12:47 AM
Moon Transit: 5:29 AM
Moonset: 10:06 AM
Moon Phase: Last Quarter
Moon Illumination: 41.2%

Best Times for Fishing or Hunting

Major Periods

4:59 AM - 7:29 AM
7:58 PM - 10:28 PM

Minor Periods

9:36 AM - 11:06 AM
12:17 AM - 1:47 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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