Water Temperature of Stony Brook in Waltham, MA

Current Water Temperature

77.5°F

Measurement Time: Tuesday, July 14, 2026, 9:10 PM EDT

Temperature Locations

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Local Points of Interest

Cambridge Reservoir (Hobbs Brook Basin)

Stony Brook

Station Name: HOBBS BK BELOW CAMBRIDGE RES NR KENDALL GREEN, MA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 167 feet

Nearest Address:
Winter St
Waltham, MA 02451
Middlesex County

GPS Coordinates: 42.3981512, -71.2733903

Nearby Water Temperatures

Stony Brook, Weston, MA (1.2 mi)
Cambridge Reservoir, Lincoln, MA (1.6 mi)
Cambridge Reservoir Tributary 3, Waltham, MA (1.7 mi)
Stony Brook Tributary, Waltham, MA (1.8 mi)
Stony Brook Tributary, Weston, MA (1.9 mi)
Stony Brook, Weston, MA (2 mi)
Hobbs Brook, Lincoln, MA (2.7 mi)
Cambridge Reservoir Tributary 1, Lexington, MA (2.7 mi)
Cambridge Reservoir Tributary 2, Lexington, MA (2.7 mi)
Stony Brook Reservoir Tributary, Weston, MA (3 mi)
Shawsheen River, Bedford, MA (4.8 mi)
Fresh Pond, Cambridge, MA (6.6 mi)
Nashua River, Clinton, MA (20.1 mi)
Gates Brook, West Boylston, MA (25.7 mi)
Stillwater River, Sterling, MA (26.4 mi)

Weather for Waltham, Massachusetts

Current Weather

78.1°F
Clear
Clear
81.8°F
79.4°F
76%
W 8.9 mph
16.5 mph
76.1°F
68.2°F
0 in
0%
9 mi
1008 mbar
0

Five Day Weather Forecast

Sunny
Wed
H: 95°F
L: 71°F
Sunny
Thu
H: 91°F
L: 67°F
Sunny
Fri
H: 85°F
L: 60°F
Partly Cloudy
Sat
H: 74°F
L: 64°F
Patchy rain nearby
Sun
H: 80°F
L: 62°F

Air Quality

AQI: 1 - Good
PM2.5: 9.7 μg/m3
PM10: 10 μg/m3
Carbon Monoxide: 146 μg/m3
Nitrogen Dioxide: 6.5 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 97 μg/m3

Astronomical

Sunrise: 5:21 AM
Sun Transit: 12:51 AM
Sunset: 8:20 PM
Daylight: 14 hrs 59 mins
Moonrise: 6:35 AM
Moon Transit: 2:10 PM
Moonset: 9:31 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

3:47 AM - 6:17 AM
1:40 PM - 4:10 PM

Minor Periods

9:01 PM - 10:31 PM
6:05 AM - 7:35 AM

Action Rating: 3 out of 5

Small Craft Advisory issued July 14 at 3:56PM EDT until July 14 at 11:00PM EDT by NWS Boston/Norton MA

Effective: Tue July 14, 2026, 3:56 PM
Expires: Tue July 14, 2026, 11:00 PM

* WHAT...Southwest winds around 15 kt with gusts up to 25 kt and waves around 2 feet expected. * WHERE...Boston Harbor. * WHEN...Until 11 PM EDT this evening. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Wednesday, July 15, 2026

Weather Forecast

Sunny
94.6°F
71.1°F
82.1°F
53%
0 in
2%
0%
15.7 mph
6.5


Air Quality

AQI: 1 - Good
PM2.5: 9.81 μg/m3
PM10: 10.08 μg/m3
Carbon Monoxide: 142.46 μg/m3
Nitrogen Dioxide: 4.82 μg/m3
Sulphur Dioxide: 0.94 μg/m3
Ozone: 100.71 μg/m3

Astronomical

Sunrise: 5:21 AM
Sun Transit: 12:51 AM
Sunset: 8:20 PM
Daylight: 14 hrs 59 mins
Moonrise: 6:35 AM
Moon Transit: 2:10 PM
Moonset: 9:31 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

3:47 AM - 6:17 AM
1:40 PM - 4:10 PM

Minor Periods

9:01 PM - 10:31 PM
6:05 AM - 7:35 AM

Action Rating: 3 out of 5

Thursday, July 16, 2026

Weather Forecast

Sunny
91.1°F
66.5°F
78.9°F
41%
0.01 in
36%
0%
14.5 mph
8.3


Air Quality

AQI: 1 - Good
PM2.5: 9.55 μg/m3
PM10: 9.73 μg/m3
Carbon Monoxide: 163.67 μg/m3
Nitrogen Dioxide: 7.67 μg/m3
Sulphur Dioxide: 0.68 μg/m3
Ozone: 84.71 μg/m3

Astronomical

Sunrise: 5:22 AM
Sun Transit: 12:51 AM
Sunset: 8:20 PM
Daylight: 14 hrs 58 mins
Moonrise: 7:55 AM
Moon Transit: 3:03 PM
Moonset: 9:58 PM
Moon Phase: New
Moon Illumination: 2.4%

Best Times for Fishing or Hunting

Major Periods

4:43 AM - 7:13 AM
2:33 PM - 5:03 PM

Minor Periods

9:28 PM - 10:58 PM
7:25 AM - 8:55 AM

Action Rating: 3 out of 5

Friday, July 17, 2026

Weather Forecast

Sunny
84.6°F
60.2°F
72°F
45%
0 in
1%
0%
10.5 mph
8.4


Air Quality

AQI: 1 - Good
PM2.5: 3.99 μg/m3
PM10: 4.1 μg/m3
Carbon Monoxide: 128.5 μg/m3
Nitrogen Dioxide: 6.01 μg/m3
Sulphur Dioxide: 0.55 μg/m3
Ozone: 79.54 μg/m3

Astronomical

Sunrise: 5:23 AM
Sun Transit: 12:51 AM
Sunset: 8:19 PM
Daylight: 14 hrs 56 mins
Moonrise: 9:10 AM
Moon Transit: 3:52 PM
Moonset: 10:21 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.0%

Best Times for Fishing or Hunting

Major Periods

5:33 AM - 8:03 AM
3:22 PM - 5:52 PM

Minor Periods

9:51 PM - 11:21 PM
8:40 AM - 10:10 AM

Action Rating: 3 out of 5

Saturday, July 18, 2026

Weather Forecast

Partly Cloudy
74.4°F
63.6°F
66.7°F
72%
0.04 in
57%
0%
9.6 mph
4.3


Air Quality

AQI: 1 - Good
PM2.5: 8.27 μg/m3
PM10: 9.61 μg/m3
Carbon Monoxide: 172.29 μg/m3
Nitrogen Dioxide: 10.08 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 79.96 μg/m3

Astronomical

Sunrise: 5:24 AM
Sun Transit: 12:51 AM
Sunset: 8:18 PM
Daylight: 14 hrs 54 mins
Moonrise: 10:22 AM
Moon Transit: 4:38 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
4:08 PM - 6:38 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

Patchy rain nearby
80°F
62°F
70.2°F
80%
0 in
23%
0%
5.6 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 2.2 μg/m3
PM10: 2.26 μg/m3
Carbon Monoxide: 247.22 μg/m3
Nitrogen Dioxide: 7.96 μg/m3
Sulphur Dioxide: 0.94 μg/m3
Ozone: 84.89 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

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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