Water Temperature of Stony Brook in Waltham, MA

Current Water Temperature

41.2°F

Measurement Time: Friday, January 9, 2026, 10:50 PM EST

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

46°F
Clear
Clear
41°F
41.2°F
76%
W 10.3 mph
17.6 mph
36.8°F
35°F
0 in
0%
9 mi
1017 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Sat
H: 41°F
L: 34°F
Moderate rain
Sun
H: 45°F
L: 32°F
Partly Cloudy
Mon
H: 32°F
L: 24°F
Partly Cloudy
Tue
H: 43°F
L: 30°F
Patchy rain nearby
Wed
H: 44°F
L: 38°F

Air Quality

PM2.5: 7.55 μg/m3
PM10: 7.75 μg/m3
Carbon Monoxide: 392.85 μg/m3
Nitrogen Dioxide: 24.25 μg/m3
Sulphur Dioxide: 4.35 μg/m3
Ozone: 32 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 11:52 AM
Sunset: 4:32 PM
Daylight: 9 hrs 19 mins
Moonrise: 12:48 AM
Moon Transit: 5:25 AM
Moonset: 10:53 AM
Moon Phase: Last Quarter
Moon Illumination: 46.5%

Best Times for Fishing or Hunting

Major Periods

4:55 AM - 7:25 AM
7:50 PM - 10:20 PM

Minor Periods

10:23 AM - 11:53 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Winter Weather Advisory issued January 10 at 12:58AM EST until January 11 at 10:00AM EST by NWS Boston/Norton MA

Effective: Sat January 10, 2026, 12:58 AM
Expires: Sat January 10, 2026, 4:00 PM

* WHAT...Freezing rain possible from late Saturday afternoon through Sunday morning. Areas with great risk of ice accumulation are across the higher elevations of the east slopes of the Berkshires, where one tenth to two tenths of ice accumulation is possible. Less ice accumulation, a few hundredths of an inch across the northern Worcester Hills. * WHERE...Northern Worcester MA, Northern Middlesex MA, Western Franklin MA, Western Hampden MA, and Western Hampshire MA Counties. * WHEN...From 5 PM this afternoon to 10 AM EST Sunday. * IMPACTS...Plan on slippery road conditions.

Slow down and use caution while traveling.


Winter Weather Advisory issued January 10 at 12:30AM EST until January 11 at 7:00PM EST by NWS Gray ME

Effective: Sat January 10, 2026, 12:30 AM
Expires: Sat January 10, 2026, 12:30 PM

* WHAT...Mixed precipitation expected. Total snow accumulations up to two inches, sleet accumulations around one quarter of an inch, and ice accumulations around one tenth of an inch. * WHERE...Portions of central, northern, and southern New Hampshire. * WHEN...From 7 PM this evening to 7 PM EST Sunday. * IMPACTS...A period of mixed precipitation is expected with air temperatures remaining below freezing. Expect slippery road conditions and avoid travel if possible. Even light snowfall amounts can accumulate on roads and cause dangerous driving conditions due to snow covered roads.

Slow down and use caution while traveling. The latest road conditions can be obtained by going to newengland511.org


Saturday, January 10, 2026

Weather Forecast

Patchy rain nearby
40.6°F
33.6°F
39.9°F
85%
0.12 in
89%
0%
13.9 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 9.54 μg/m3
PM10: 10.73 μg/m3
Carbon Monoxide: 340.69 μg/m3
Nitrogen Dioxide: 23.89 μg/m3
Sulphur Dioxide: 4.84 μg/m3
Ozone: 39.44 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 11:52 AM
Sunset: 4:32 PM
Daylight: 9 hrs 19 mins
Moonrise: 12:48 AM
Moon Transit: 5:25 AM
Moonset: 10:53 AM
Moon Phase: Last Quarter
Moon Illumination: 46.5%

Best Times for Fishing or Hunting

Major Periods

4:55 AM - 7:25 AM
7:50 PM - 10:20 PM

Minor Periods

10:23 AM - 11:53 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Sunday, January 11, 2026

Weather Forecast

Moderate rain
44.6°F
32.1°F
37.9°F
81%
0.26 in
89%
0%
11.9 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 11.64 μg/m3
PM10: 13.29 μg/m3
Carbon Monoxide: 259.29 μg/m3
Nitrogen Dioxide: 30.09 μg/m3
Sulphur Dioxide: 5.03 μg/m3
Ozone: 32.88 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 11:53 AM
Sunset: 4:33 PM
Daylight: 9 hrs 20 mins
Moonrise: 12:52 AM
Moon Transit: 6:07 AM
Moonset: 11:14 AM
Moon Phase: Last Quarter
Moon Illumination: 35.3%

Best Times for Fishing or Hunting

Major Periods

5:37 AM - 8:07 AM
8:33 PM - 11:03 PM

Minor Periods

10:44 AM - 12:14 AM
12:22 AM - 1:52 AM

Action Rating: 2 out of 5

Monday, January 12, 2026

Weather Forecast

Partly Cloudy
31.8°F
23.5°F
28.7°F
64%
0 in
0%
0%
15.4 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 3.47 μg/m3
PM10: 3.65 μg/m3
Carbon Monoxide: 183.45 μg/m3
Nitrogen Dioxide: 11.05 μg/m3
Sulphur Dioxide: 2.79 μg/m3
Ozone: 63.36 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 11:53 AM
Sunset: 4:35 PM
Daylight: 9 hrs 22 mins
Moonrise: 1:56 AM
Moon Transit: 6:50 AM
Moonset: 11:38 AM
Moon Phase: Last Quarter
Moon Illumination: 25.0%

Best Times for Fishing or Hunting

Major Periods

6:20 AM - 8:50 AM
9:18 PM - 11:48 PM

Minor Periods

11:08 AM - 12:38 AM
1:26 AM - 2:56 AM

Action Rating: 2 out of 5

Tuesday, January 13, 2026

Weather Forecast

Partly Cloudy
42.7°F
29.8°F
35°F
66%
0 in
0%
0%
10.5 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 8.78 μg/m3
PM10: 9.37 μg/m3
Carbon Monoxide: 239.83 μg/m3
Nitrogen Dioxide: 25.22 μg/m3
Sulphur Dioxide: 7.16 μg/m3
Ozone: 36.38 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 11:53 AM
Sunset: 4:36 PM
Daylight: 9 hrs 23 mins
Moonrise: 3:00 AM
Moon Transit: 7:36 AM
Moonset: 12:07 AM
Moon Phase: Waning Crescent
Moon Illumination: 15.9%

Best Times for Fishing or Hunting

Major Periods

7:06 AM - 9:36 AM
12:00 AM - 12:00 AM

Minor Periods

11:37 AM - 1:07 PM
2:30 AM - 4:00 AM

Action Rating: 3 out of 5

Wednesday, January 14, 2026

Weather Forecast

Patchy rain nearby
44.3°F
37.8°F
40.5°F
79%
0.07 in
63%
0%
14.1 mph
0


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 11:54 AM
Sunset: 4:37 PM
Daylight: 9 hrs 25 mins
Moonrise: 4:04 AM
Moon Transit: 8:25 AM
Moonset: 12:43 AM
Moon Phase: Waning Crescent
Moon Illumination: 8.5%

Best Times for Fishing or Hunting

Major Periods

7:55 AM - 10:25 AM
12:00 AM - 12:00 AM

Minor Periods

12:13 AM - 1:43 PM
3:34 AM - 5:04 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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