Water Temperature of Stony Brook in Waltham, MA

Current Water Temperature

57.4°F

Measurement Time: Thursday, April 23, 2026, 10:50 AM 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

63°F
Sunny
Sunny
63°F
67.1°F
18%
NW 14.1 mph
16.2 mph
67.1°F
26.2°F
0 in
25%
9 mi
1010 mbar
4

Five Day Weather Forecast

Sunny
Thu
H: 68°F
L: 42°F
Sunny
Fri
H: 57°F
L: 37°F
Overcast
Sat
H: 51°F
L: 37°F
Sunny
Sun
H: 58°F
L: 38°F
Partly Cloudy
Mon
H: 62°F
L: 39°F

Air Quality

AQI: 2 - Moderate
PM2.5: 5.05 μg/m3
PM10: 5.55 μg/m3
Carbon Monoxide: 192.85 μg/m3
Nitrogen Dioxide: 20.65 μg/m3
Sulphur Dioxide: 2.95 μg/m3
Ozone: 82 μg/m3

Astronomical

Sunrise: 5:52 AM
Sun Transit: 12:43 AM
Sunset: 7:36 PM
Daylight: 13 hrs 44 mins
Moonrise: 11:04 AM
Moon Transit: 6:56 PM
Moonset: 1:59 AM
Moon Phase: First Quarter
Moon Illumination: 39.1%

Best Times for Fishing or Hunting

Major Periods

8:33 AM - 11:03 AM
6:26 PM - 8:56 PM

Minor Periods

10:34 AM - 12:04 AM
1:29 AM - 2:59 AM

Action Rating: 2 out of 5

Special Weather Statement issued April 23 at 9:06AM EDT by NWS Gray ME

Effective: Thu April 23, 2026, 9:06 AM
Expires: Thu April 23, 2026, 7:00 PM

A very dry air mass and breezy conditions will combine with dead and dry fuels such as grass, leaves, and twigs to create the potential for uncontrolled fire spread across southern New Hampshire today. This afternoon, relative humidity values will decrease to low levels between 20 to 25 percent. At the same time, northwest winds 15 to 20 mph with frequent gusts to 30 mph will continue to dry fuels and increase fire spread potential. Wind gusts are expected to diminish later this evening with increasing relative humidity values. Extra caution should be taken to prevent wildfires. Always consult with fire officials before engaging in any open burning activities and comply with all applicable laws and regulations. Never leave an open fire unattended and always extinguish campfires completely before leaving.


Thursday, April 23, 2026

Weather Forecast

Sunny
67.5°F
42.1°F
54°F
51%
0 in
0%
0%
14.8 mph
5.2


Air Quality

AQI: 1 - Good
PM2.5: 11.16 μg/m3
PM10: 12.98 μg/m3
Carbon Monoxide: 197.93 μg/m3
Nitrogen Dioxide: 12.91 μg/m3
Sulphur Dioxide: 3.23 μg/m3
Ozone: 82.72 μg/m3

Astronomical

Sunrise: 5:52 AM
Sun Transit: 12:43 AM
Sunset: 7:36 PM
Daylight: 13 hrs 44 mins
Moonrise: 11:04 AM
Moon Transit: 6:56 PM
Moonset: 1:59 AM
Moon Phase: First Quarter
Moon Illumination: 39.1%

Best Times for Fishing or Hunting

Major Periods

8:33 AM - 11:03 AM
6:26 PM - 8:56 PM

Minor Periods

10:34 AM - 12:04 AM
1:29 AM - 2:59 AM

Action Rating: 2 out of 5

Friday, April 24, 2026

Weather Forecast

Sunny
57.2°F
37.2°F
46°F
46%
0 in
0%
0%
9.8 mph
5.7


Air Quality

AQI: 1 - Good
PM2.5: 8.69 μg/m3
PM10: 9.39 μg/m3
Carbon Monoxide: 215.05 μg/m3
Nitrogen Dioxide: 25.75 μg/m3
Sulphur Dioxide: 3.51 μg/m3
Ozone: 65.84 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 12:43 AM
Sunset: 7:37 PM
Daylight: 13 hrs 47 mins
Moonrise: 12:20 AM
Moon Transit: 7:49 PM
Moonset: 2:36 AM
Moon Phase: First Quarter
Moon Illumination: 50.4%

Best Times for Fishing or Hunting

Major Periods

9:28 AM - 11:58 AM
7:19 PM - 9:49 PM

Minor Periods

11:50 AM - 1:20 PM
2:06 AM - 3:36 AM

Action Rating: 3 out of 5

Saturday, April 25, 2026

Weather Forecast

Overcast
50.6°F
36.5°F
44°F
58%
0 in
0%
0%
7.4 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 9.22 μg/m3
PM10: 10.15 μg/m3
Carbon Monoxide: 211.37 μg/m3
Nitrogen Dioxide: 24.65 μg/m3
Sulphur Dioxide: 3.64 μg/m3
Ozone: 58.96 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 12:43 AM
Sunset: 7:38 PM
Daylight: 13 hrs 50 mins
Moonrise: 1:32 PM
Moon Transit: 8:37 PM
Moonset: 3:05 AM
Moon Phase: First Quarter
Moon Illumination: 61.6%

Best Times for Fishing or Hunting

Major Periods

10:18 AM - 12:48 AM
8:07 PM - 10:37 PM

Minor Periods

1:02 PM - 2:32 PM
2:35 AM - 4:05 AM

Action Rating: 3 out of 5

Sunday, April 26, 2026

Weather Forecast

Sunny
58.1°F
38.1°F
47.3°F
59%
0 in
0%
0%
8.9 mph
6.2


Air Quality

AQI: 1 - Good
PM2.5: 7.59 μg/m3
PM10: 8.47 μg/m3
Carbon Monoxide: 227.96 μg/m3
Nitrogen Dioxide: 21.95 μg/m3
Sulphur Dioxide: 3.95 μg/m3
Ozone: 60.48 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 12:42 AM
Sunset: 7:39 PM
Daylight: 13 hrs 52 mins
Moonrise: 2:42 PM
Moon Transit: 9:22 PM
Moonset: 3:28 AM
Moon Phase: First Quarter
Moon Illumination: 72.3%

Best Times for Fishing or Hunting

Major Periods

11:04 AM - 1:34 PM
8:52 PM - 11:22 PM

Minor Periods

2:12 PM - 3:42 PM
2:58 AM - 4:28 AM

Action Rating: 2 out of 5

Monday, April 27, 2026

Weather Forecast

Partly Cloudy
61.9°F
38.6°F
49.9°F
61%
0 in
0%
0%
9.6 mph
0.6


Air Quality

AQI: 2 - Moderate
PM2.5: 24.17 μg/m3
PM10: 25.35 μg/m3
Carbon Monoxide: 423.77 μg/m3
Nitrogen Dioxide: 55 μg/m3
Sulphur Dioxide: 6.2 μg/m3
Ozone: 16.69 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 12:42 AM
Sunset: 7:40 PM
Daylight: 13 hrs 55 mins
Moonrise: 3:49 PM
Moon Transit: 10:04 PM
Moonset: 3:49 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 81.8%

Best Times for Fishing or Hunting

Major Periods

11:47 AM - 2:17 PM
12:00 AM - 12:00 AM

Minor Periods

3:19 PM - 4:49 PM
3:19 AM - 4:49 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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