Water Temperature of Stony Brook in Weston, MA

Current Water Temperature

77.5°F

Measurement Time: Thursday, July 9, 2026, 12:10 PM EDT

Temperature Locations

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Local Points of Interest

South Quarry Pond; Stony Brook Reservoir; Waltham, MA

Stony Brook

Station Name: STONY BROOK AT RT 20 AT WALTHAM, MA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 105 feet

Nearest Address:
99 Sibley Rd
Weston, MA 02493
Middlesex County

GPS Coordinates: 42.368985, -71.2706123

Nearby Water Temperatures

Stony Brook Tributary, Waltham, MA (0.2 mi)
Stony Brook Tributary, Weston, MA (0.3 mi)
Stony Brook Reservoir Tributary, Weston, MA (1 mi)
Stony Brook, Weston, MA (1.5 mi)
Stony Brook, Waltham, MA (2 mi)
Cambridge Reservoir Tributary 3, Waltham, MA (3.6 mi)
Cambridge Reservoir, Lincoln, MA (3.6 mi)
Cambridge Reservoir Tributary 2, Lexington, MA (4.7 mi)
Hobbs Brook, Lincoln, MA (4.7 mi)
Cambridge Reservoir Tributary 1, Lexington, MA (4.7 mi)
Fresh Pond, Cambridge, MA (6.5 mi)
Shawsheen River, Bedford, MA (6.8 mi)
Nashua River, Clinton, MA (20.5 mi)
Gates Brook, West Boylston, MA (25.8 mi)
Stillwater River, Sterling, MA (26.7 mi)

Weather for Weston, Massachusetts

Current Weather

89.1°F
Partly cloudy
Partly cloudy
92.4°F
97.9°F
45%
SW 10.1 mph
12.4 mph
92.1°F
68.5°F
0 in
75%
9 mi
1008 mbar
2.4

Five Day Weather Forecast

Sunny
Thu
H: 94°F
L: 65°F
Patchy rain nearby
Fri
H: 86°F
L: 68°F
Partly Cloudy
Sat
H: 80°F
L: 61°F
Sunny
Sun
H: 80°F
L: 57°F
Sunny
Mon
H: 89°F
L: 57°F

Air Quality

AQI: 1 - Good
PM2.5: 8.3 μg/m3
PM10: 8.5 μg/m3
Carbon Monoxide: 163 μg/m3
Nitrogen Dioxide: 3.2 μg/m3
Sulphur Dioxide: 0.9 μg/m3
Ozone: 137 μg/m3

Astronomical

Sunrise: 5:17 AM
Sun Transit: 12:50 AM
Sunset: 8:24 PM
Daylight: 15 hrs 7 mins
Moonrise: 12:34 AM
Moon Transit: 7:55 AM
Moonset: 3:31 PM
Moon Phase: Last Quarter
Moon Illumination: 17.4%

Best Times for Fishing or Hunting

Major Periods

7:25 AM - 9:55 AM
12:00 AM - 12:00 AM

Minor Periods

3:01 PM - 4:31 PM
12:04 AM - 1:34 AM

Action Rating: 2 out of 5

Heat Advisory issued July 9 at 7:00AM EDT until July 9 at 8:00PM EDT by NWS Gray ME

Effective: Thu July 9, 2026, 7:00 AM
Expires: Thu July 9, 2026, 7:00 PM

* WHAT...Heat index values up to 98 expected. * WHERE...Eastern Hillsborough and Interior Rockingham Counties. * WHEN...From 11 AM this morning to 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.


Heat Advisory issued July 9 at 1:31PM EDT until July 9 at 8:00PM EDT by NWS Gray ME

Effective: Thu July 9, 2026, 1:31 PM
Expires: Thu July 9, 2026, 8:00 PM

* WHAT...Heat index values in the mid to upper 90s expected. * WHERE...Eastern Hillsborough and Interior Rockingham Counties. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.
Thursday, July 9, 2026

Weather Forecast

Sunny
93.9°F
64.9°F
79.6°F
67%
0 in
5%
0%
11.6 mph
8.7


Air Quality

AQI: 1 - Good
PM2.5: 8.62 μg/m3
PM10: 8.86 μg/m3
Carbon Monoxide: 173.33 μg/m3
Nitrogen Dioxide: 7.73 μg/m3
Sulphur Dioxide: 0.87 μg/m3
Ozone: 102.04 μg/m3

Astronomical

Sunrise: 5:17 AM
Sun Transit: 12:50 AM
Sunset: 8:24 PM
Daylight: 15 hrs 7 mins
Moonrise: 12:34 AM
Moon Transit: 7:55 AM
Moonset: 3:31 PM
Moon Phase: Last Quarter
Moon Illumination: 17.4%

Best Times for Fishing or Hunting

Major Periods

7:25 AM - 9:55 AM
12:00 AM - 12:00 AM

Minor Periods

3:01 PM - 4:31 PM
12:04 AM - 1:34 AM

Action Rating: 2 out of 5

Friday, July 10, 2026

Weather Forecast

Patchy rain nearby
85.7°F
67.7°F
74.9°F
80%
0.08 in
65%
0%
8.3 mph
8.5


Air Quality

AQI: 1 - Good
PM2.5: 9.19 μg/m3
PM10: 9.69 μg/m3
Carbon Monoxide: 178.38 μg/m3
Nitrogen Dioxide: 9.42 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 100.33 μg/m3

Astronomical

Sunrise: 5:18 AM
Sun Transit: 12:50 AM
Sunset: 8:23 PM
Daylight: 15 hrs 6 mins
Moonrise: 1:06 AM
Moon Transit: 8:52 AM
Moonset: 4:51 PM
Moon Phase: Waning Crescent
Moon Illumination: 9.7%

Best Times for Fishing or Hunting

Major Periods

8:22 AM - 10:52 AM
12:00 AM - 12:00 AM

Minor Periods

4:21 PM - 5:51 PM
12:36 AM - 2:06 AM

Action Rating: 2 out of 5

Saturday, July 11, 2026

Weather Forecast

Partly Cloudy
80.1°F
60.8°F
70°F
79%
0.03 in
48%
0%
9.6 mph
7.8


Air Quality

AQI: 1 - Good
PM2.5: 14.73 μg/m3
PM10: 15.27 μg/m3
Carbon Monoxide: 183.21 μg/m3
Nitrogen Dioxide: 13.38 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 84 μg/m3

Astronomical

Sunrise: 5:18 AM
Sun Transit: 12:50 AM
Sunset: 8:23 PM
Daylight: 15 hrs 4 mins
Moonrise: 1:49 AM
Moon Transit: 9:54 AM
Moonset: 6:09 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:24 AM - 11:54 AM

Minor Periods

5:39 PM - 7:09 PM
1:19 AM - 2:49 AM

Action Rating: 2 out of 5

Sunday, July 12, 2026

Weather Forecast

Sunny
79.5°F
56.9°F
67.8°F
61%
0 in
4%
0%
9.6 mph
7.4


Air Quality

AQI: 1 - Good
PM2.5: 13.95 μg/m3
PM10: 14.53 μg/m3
Carbon Monoxide: 170.8 μg/m3
Nitrogen Dioxide: 9.47 μg/m3
Sulphur Dioxide: 0.75 μg/m3
Ozone: 77.63 μg/m3

Astronomical

Sunrise: 5:19 AM
Sun Transit: 12:50 AM
Sunset: 8:22 PM
Daylight: 15 hrs 3 mins
Moonrise: 2:44 AM
Moon Transit: 11:00 AM
Moonset: 7:18 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.8%

Best Times for Fishing or Hunting

Major Periods

12:34 AM - 3:04 AM
10:30 AM - 1:00 PM

Minor Periods

6:48 PM - 8:18 PM
2:14 AM - 3:44 AM

Action Rating: 3 out of 5

Monday, July 13, 2026

Weather Forecast

Sunny
89.1°F
56.8°F
72.9°F
55%
0 in
3%
0%
11 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 8.77 μg/m3
PM10: 9.36 μg/m3
Carbon Monoxide: 211.78 μg/m3
Nitrogen Dioxide: 11.99 μg/m3
Sulphur Dioxide: 0.9 μg/m3
Ozone: 65.33 μg/m3

Astronomical

Sunrise: 5:20 AM
Sun Transit: 12:50 AM
Sunset: 8:22 PM
Daylight: 15 hrs 2 mins
Moonrise: 3:53 AM
Moon Transit: 12:07 AM
Moonset: 8:14 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

1:41 AM - 4:11 AM
11:37 AM - 2:07 PM

Minor Periods

7:44 PM - 9:14 PM
3:23 AM - 4:53 AM

Action Rating: 4 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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