Water Temperature of Cambridge Reservoir Tributary 3 in Waltham, MA

Current Water Temperature

67.3°F

Measurement Time: Saturday, July 18, 2026, 4:40 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
Mist
Mist
69.1°F
76.4°F
90%
SSW 13 mph
21 mph
72.1°F
68.8°F
0.08 in
75%
2 mi
1004 mbar
0

Five Day Weather Forecast

Smoky haze
Sat
H: 91°F
L: 58°F
Sunny
Sun
H: 80°F
L: 61°F
Sunny
Mon
H: 85°F
L: 57°F
Sunny
Tue
H: 80°F
L: 61°F
Light rain shower
Wed
H: 83°F
L: 65°F

Air Quality

AQI: 1 - Good
PM2.5: 37.7 μg/m3
PM10: 38.6 μg/m3
Carbon Monoxide: 144 μg/m3
Nitrogen Dioxide: 7.9 μg/m3
Sulphur Dioxide: 1.1 μg/m3
Ozone: 103 μg/m3

Astronomical

Sunrise: 5:24 AM
Sun Transit: 12:51 AM
Sunset: 8:18 PM
Daylight: 14 hrs 55 mins
Moonrise: 10:22 AM
Moon Transit: 4:37 PM
Moonset: 10:42 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

6:20 AM - 8:50 AM
4:07 PM - 6:37 PM

Minor Periods

10:12 PM - 11:42 PM
9:52 AM - 11:22 AM

Action Rating: 2 out of 5

Small Craft Advisory issued July 18 at 1:36AM EDT until July 19 at 12:00PM EDT by NWS Boston/Norton MA

Effective: Sat July 18, 2026, 1:36 AM
Expires: Sat July 18, 2026, 8:00 PM

* WHAT...Southwest winds 10 to 20 kt with gusts up to 30 kt and waves 2 to 4 feet expected. * WHERE...In Massachusetts coastal waters, Boston Harbor. In Rhode Island coastal waters, Narragansett Bay. * WHEN...From 11 AM this morning to noon EDT Sunday. * 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 18 at 12:41PM EDT until July 19 at 12:00PM EDT by NWS Boston/Norton MA

Effective: Sat July 18, 2026, 12:41 PM
Expires: Sun July 19, 2026, 11:00 AM

* WHAT...Southwest winds 10 to 20 kt with gusts up to 30 kt and waves 2 to 4 feet. * WHERE...In Massachusetts coastal waters, Boston Harbor. In Rhode Island coastal waters, Narragansett Bay. * WHEN...Until noon EDT Sunday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Saturday, July 18, 2026

Weather Forecast

Smoky haze
90.5°F
57.6°F
72.1°F
68%
0.21 in
63%
0%
14.3 mph
4.3


Air Quality

AQI: 2 - Moderate
PM2.5: 36.7 μg/m3
PM10: 37.91 μg/m3
Carbon Monoxide: 191.38 μg/m3
Nitrogen Dioxide: 18.49 μg/m3
Sulphur Dioxide: 1.24 μg/m3
Ozone: 89.21 μg/m3

Astronomical

Sunrise: 5:24 AM
Sun Transit: 12:51 AM
Sunset: 8:18 PM
Daylight: 14 hrs 55 mins
Moonrise: 10:22 AM
Moon Transit: 4:37 PM
Moonset: 10:42 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

6:20 AM - 8:50 AM
4:07 PM - 6:37 PM

Minor Periods

10:12 PM - 11:42 PM
9:52 AM - 11:22 AM

Action Rating: 2 out of 5

Sunday, July 19, 2026

Weather Forecast

Sunny
80°F
61.4°F
71°F
58%
0 in
4%
0%
13.2 mph
7.6


Air Quality

AQI: 1 - Good
PM2.5: 4.92 μg/m3
PM10: 4.97 μg/m3
Carbon Monoxide: 162.67 μg/m3
Nitrogen Dioxide: 4.75 μg/m3
Sulphur Dioxide: 0.68 μg/m3
Ozone: 89.08 μg/m3

Astronomical

Sunrise: 5:25 AM
Sun Transit: 12:51 AM
Sunset: 8:18 PM
Daylight: 14 hrs 53 mins
Moonrise: 11:31 AM
Moon Transit: 5:21 PM
Moonset: 11:02 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.6%

Best Times for Fishing or Hunting

Major Periods

7:04 AM - 9:34 AM
4:51 PM - 7:21 PM

Minor Periods

12:00 AM - 12:00 AM
11:01 AM - 12:31 AM

Action Rating: 2 out of 5

Monday, July 20, 2026

Weather Forecast

Sunny
85.3°F
56.5°F
70.7°F
45%
0 in
1%
0%
10.1 mph
7.9


Air Quality

AQI: 1 - Good
PM2.5: 6.13 μg/m3
PM10: 6.42 μg/m3
Carbon Monoxide: 136.83 μg/m3
Nitrogen Dioxide: 8.74 μg/m3
Sulphur Dioxide: 0.58 μg/m3
Ozone: 75.92 μg/m3

Astronomical

Sunrise: 5:26 AM
Sun Transit: 12:51 AM
Sunset: 8:17 PM
Daylight: 14 hrs 51 mins
Moonrise: 12:38 AM
Moon Transit: 6:05 PM
Moonset: 12:02 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

7:47 AM - 10:17 AM
5:35 PM - 8:05 PM

Minor Periods

12:08 AM - 1:38 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Tuesday, July 21, 2026

Weather Forecast

Sunny
80.2°F
61.1°F
69.9°F
67%
0.4 in
71%
0%
12.5 mph
6.3


Air Quality

AQI: 1 - Good
PM2.5: 9.6 μg/m3
PM10: 11.86 μg/m3
Carbon Monoxide: 173.04 μg/m3
Nitrogen Dioxide: 7.8 μg/m3
Sulphur Dioxide: 0.83 μg/m3
Ozone: 88.5 μg/m3

Astronomical

Sunrise: 5:27 AM
Sun Transit: 12:51 AM
Sunset: 8:16 PM
Daylight: 14 hrs 49 mins
Moonrise: 1:44 PM
Moon Transit: 6:49 PM
Moonset: 12:23 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

8:31 AM - 11:01 AM
6:19 PM - 8:49 PM

Minor Periods

1:14 PM - 2:44 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, July 22, 2026

Weather Forecast

Light rain shower
82.5°F
65.2°F
73.9°F
79%
0.35 in
79%
0%
11 mph
4.7


Air Quality

AQI: 1 - Good
PM2.5: 2.29 μg/m3
PM10: 2.58 μg/m3
Carbon Monoxide: 165.67 μg/m3
Nitrogen Dioxide: 7.12 μg/m3
Sulphur Dioxide: 0.56 μg/m3
Ozone: 74 μg/m3

Astronomical

Sunrise: 5:27 AM
Sun Transit: 12:51 AM
Sunset: 8:15 PM
Daylight: 14 hrs 48 mins
Moonrise: 2:49 PM
Moon Transit: 7:34 PM
Moonset: 12:46 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

9:16 AM - 11:46 AM
7:04 PM - 9:34 PM

Minor Periods

2:19 PM - 3:49 PM
12:00 AM - 12:00 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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