Water Temperature of Cambridge Reservoir Tributary 3 in Waltham, MA

Current Water Temperature

64.4°F

Measurement Time: Monday, July 27, 2026, 5:40 PM EDT

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

69.1°F
Clear
Clear
58.5°F
69.1°F
68%
SSW 6 mph
11.9 mph
69.1°F
58°F
0 in
0%
6 mi
1008 mbar
0

Five Day Weather Forecast

Sunny
Mon
H: 89°F
L: 52°F
Sunny
Tue
H: 87°F
L: 64°F
Light rain shower
Wed
H: 75°F
L: 65°F
Light rain shower
Thu
H: 66°F
L: 63°F
Patchy rain nearby
Fri
H: 66°F
L: 63°F

Air Quality

AQI: 1 - Good
PM2.5: 11.7 μg/m3
PM10: 12.9 μg/m3
Carbon Monoxide: 190 μg/m3
Nitrogen Dioxide: 17.3 μg/m3
Sulphur Dioxide: 1 μg/m3
Ozone: 78 μg/m3

Astronomical

Sunrise: 5:32 AM
Sun Transit: 12:51 AM
Sunset: 8:10 PM
Daylight: 14 hrs 38 mins
Moonrise: 7:23 PM
Moon Transit: 11:45 PM
Moonset: 3:11 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

1:25 PM - 3:55 PM
12:00 AM - 12:00 AM

Minor Periods

6:53 PM - 8:23 PM
2:41 AM - 4:11 AM

Action Rating: 3 out of 5

Small Craft Advisory issued July 27 at 1:23PM EDT until July 29 at 8:00PM EDT by NWS Boston/Norton MA

Effective: Mon July 27, 2026, 1:23 PM
Expires: Tue July 28, 2026, 6:00 AM

* WHAT...East winds 10 to 20 kt with gusts up to 25 kt and waves around 2 feet expected. * WHERE...Boston Harbor. * WHEN...From 2 AM to 8 PM EDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Monday, July 27, 2026

Weather Forecast

Sunny
89.1°F
51.6°F
69.5°F
57%
0 in
3%
0%
9.4 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 12.62 μg/m3
PM10: 14.08 μg/m3
Carbon Monoxide: 180.17 μg/m3
Nitrogen Dioxide: 16.16 μg/m3
Sulphur Dioxide: 1.13 μg/m3
Ozone: 72.88 μg/m3

Astronomical

Sunrise: 5:32 AM
Sun Transit: 12:51 AM
Sunset: 8:10 PM
Daylight: 14 hrs 38 mins
Moonrise: 7:23 PM
Moon Transit: 11:45 PM
Moonset: 3:11 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

1:25 PM - 3:55 PM
12:00 AM - 12:00 AM

Minor Periods

6:53 PM - 8:23 PM
2:41 AM - 4:11 AM

Action Rating: 3 out of 5

Tuesday, July 28, 2026

Weather Forecast

Sunny
86.7°F
64°F
73.3°F
72%
0.07 in
57%
0%
14.1 mph
7.6


Air Quality

AQI: 1 - Good
PM2.5: 12.96 μg/m3
PM10: 15.76 μg/m3
Carbon Monoxide: 136.71 μg/m3
Nitrogen Dioxide: 6.93 μg/m3
Sulphur Dioxide: 0.99 μg/m3
Ozone: 101.83 μg/m3

Astronomical

Sunrise: 5:33 AM
Sun Transit: 12:51 AM
Sunset: 8:09 PM
Daylight: 14 hrs 36 mins
Moonrise: 7:58 PM
Moon Transit: 12:00 AM
Moonset: 4:13 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:15 PM - 4:45 PM

Minor Periods

7:28 PM - 8:58 PM
3:43 AM - 5:13 AM

Action Rating: 4 out of 5

Wednesday, July 29, 2026

Weather Forecast

Light rain shower
75.2°F
65.4°F
69.4°F
93%
0.71 in
92%
0%
9.2 mph
5.2


Air Quality

AQI: 1 - Good
PM2.5: 6.84 μg/m3
PM10: 7.9 μg/m3
Carbon Monoxide: 121.58 μg/m3
Nitrogen Dioxide: 7.91 μg/m3
Sulphur Dioxide: 0.83 μg/m3
Ozone: 92 μg/m3

Astronomical

Sunrise: 5:34 AM
Sun Transit: 12:51 AM
Sunset: 8:08 PM
Daylight: 14 hrs 34 mins
Moonrise: 8:26 PM
Moon Transit: 12:34 AM
Moonset: 5:18 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:04 AM - 2:34 AM
3:02 PM - 5:32 PM

Minor Periods

7:56 PM - 9:26 PM
4:48 AM - 6:18 AM

Action Rating: 4 out of 5

Thursday, July 30, 2026

Weather Forecast

Light rain shower
66.4°F
62.9°F
64.5°F
98%
0.33 in
93%
0%
10.1 mph
1.7


Air Quality

AQI: 1 - Good
PM2.5: 5.79 μg/m3
PM10: 5.98 μg/m3
Carbon Monoxide: 144.01 μg/m3
Nitrogen Dioxide: 13.67 μg/m3
Sulphur Dioxide: 0.85 μg/m3
Ozone: 67.83 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 12:51 AM
Sunset: 8:07 PM
Daylight: 14 hrs 32 mins
Moonrise: 8:50 PM
Moon Transit: 1:21 AM
Moonset: 6:25 AM
Moon Phase: Full
Moon Illumination: 97.1%

Best Times for Fishing or Hunting

Major Periods

12:51 AM - 3:21 AM
3:48 PM - 6:18 PM

Minor Periods

8:20 PM - 9:50 PM
5:55 AM - 7:25 AM

Action Rating: 5 out of 5

Friday, July 31, 2026

Weather Forecast

Patchy rain nearby
65.7°F
63.1°F
64.1°F
94%
0.02 in
67%
0%
6.7 mph
1.3


Air Quality

AQI: 1 - Good
PM2.5: 5.68 μg/m3
PM10: 5.9 μg/m3
Carbon Monoxide: 277.78 μg/m3
Nitrogen Dioxide: 14.07 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 51.44 μg/m3

Astronomical

Sunrise: 5:36 AM
Sun Transit: 12:51 AM
Sunset: 8:06 PM
Daylight: 14 hrs 30 mins
Moonrise: 9:11 PM
Moon Transit: 2:05 AM
Moonset: 7:31 AM
Moon Phase: Full
Moon Illumination: 92.0%

Best Times for Fishing or Hunting

Major Periods

1:35 AM - 4:05 AM
4:32 PM - 7:02 PM

Minor Periods

8:41 PM - 10:11 PM
7:01 AM - 8:31 AM

Action Rating: 3 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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