Water Temperature of Stony Brook in Weston, MA

Current Water Temperature

76.1°F

Measurement Time: Thursday, July 23, 2026, 12:40 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

79°F
Sunny
Sunny
77.9°F
82.2°F
31%
NW 4 mph
4.7 mph
84°F
50°F
0 in
0%
9 mi
1019 mbar
1.9

Five Day Weather Forecast

Sunny
Thu
H: 85°F
L: 59°F
Sunny
Fri
H: 85°F
L: 57°F
Sunny
Sat
H: 80°F
L: 57°F
Sunny
Sun
H: 80°F
L: 54°F
Sunny
Mon
H: 86°F
L: 55°F

Air Quality

AQI: 1 - Good
PM2.5: 6.2 μg/m3
PM10: 6.6 μg/m3
Carbon Monoxide: 125 μg/m3
Nitrogen Dioxide: 2.9 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 113 μg/m3

Astronomical

Sunrise: 5:29 AM
Sun Transit: 12:51 AM
Sunset: 8:14 PM
Daylight: 14 hrs 45 mins
Moonrise: 3:54 PM
Moon Transit: 8:22 PM
Moonset: 12:14 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

10:03 AM - 12:33 AM
7:52 PM - 10:22 PM

Minor Periods

3:24 PM - 4:54 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

High Surf Advisory issued July 23 at 2:40AM EDT until July 23 at 8:00PM EDT by NWS Boston/Norton MA

Effective: Thu July 23, 2026, 2:40 AM
Expires: Thu July 23, 2026, 8:00 PM

* WHAT...Large breaking waves of 4 to 7 feet in the surf zone and high risk of rip currents. * WHERE...Washington, Southern Bristol MA, Southern Plymouth MA, Barnstable MA, Dukes MA, Nantucket MA, and Newport RI Counties. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion.

Inexperienced swimmers should remain out of the water due to dangerous surf conditions.
Thursday, July 23, 2026

Weather Forecast

Sunny
85.3°F
58.5°F
70.3°F
57%
0 in
3%
0%
7.6 mph
8.1


Air Quality

AQI: 1 - Good
PM2.5: 5.3 μg/m3
PM10: 5.6 μg/m3
Carbon Monoxide: 150.46 μg/m3
Nitrogen Dioxide: 7.84 μg/m3
Sulphur Dioxide: 0.57 μg/m3
Ozone: 80.04 μg/m3

Astronomical

Sunrise: 5:29 AM
Sun Transit: 12:51 AM
Sunset: 8:14 PM
Daylight: 14 hrs 45 mins
Moonrise: 3:54 PM
Moon Transit: 8:22 PM
Moonset: 12:14 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

10:03 AM - 12:33 AM
7:52 PM - 10:22 PM

Minor Periods

3:24 PM - 4:54 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Friday, July 24, 2026

Weather Forecast

Sunny
85°F
56.5°F
70.4°F
53%
0 in
2%
0%
8.3 mph
7.8


Air Quality

AQI: 1 - Good
PM2.5: 9.84 μg/m3
PM10: 10.35 μg/m3
Carbon Monoxide: 226.33 μg/m3
Nitrogen Dioxide: 14.7 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 86.29 μg/m3

Astronomical

Sunrise: 5:30 AM
Sun Transit: 12:51 AM
Sunset: 8:13 PM
Daylight: 14 hrs 44 mins
Moonrise: 4:56 PM
Moon Transit: 9:12 PM
Moonset: 12:47 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

10:52 AM - 1:22 PM
8:42 PM - 11:12 PM

Minor Periods

4:26 PM - 5:56 PM
12:17 AM - 1:47 AM

Action Rating: 3 out of 5

Saturday, July 25, 2026

Weather Forecast

Sunny
79.9°F
56.6°F
67.5°F
53%
0 in
2%
0%
9.8 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 8.78 μg/m3
PM10: 9.71 μg/m3
Carbon Monoxide: 167.71 μg/m3
Nitrogen Dioxide: 10 μg/m3
Sulphur Dioxide: 0.74 μg/m3
Ozone: 89.38 μg/m3

Astronomical

Sunrise: 5:30 AM
Sun Transit: 12:51 AM
Sunset: 8:12 PM
Daylight: 14 hrs 42 mins
Moonrise: 5:52 PM
Moon Transit: 10:03 PM
Moonset: 1:27 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.2%

Best Times for Fishing or Hunting

Major Periods

11:43 AM - 2:13 PM
12:00 AM - 12:00 AM

Minor Periods

5:22 PM - 6:52 PM
12:57 AM - 2:27 AM

Action Rating: 2 out of 5

Sunday, July 26, 2026

Weather Forecast

Sunny
80°F
53.8°F
65.7°F
59%
0 in
5%
0%
8.3 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 11.43 μg/m3
PM10: 13.12 μg/m3
Carbon Monoxide: 178.39 μg/m3
Nitrogen Dioxide: 15.55 μg/m3
Sulphur Dioxide: 0.95 μg/m3
Ozone: 72.75 μg/m3

Astronomical

Sunrise: 5:31 AM
Sun Transit: 12:51 AM
Sunset: 8:11 PM
Daylight: 14 hrs 40 mins
Moonrise: 6:42 PM
Moon Transit: 10:55 PM
Moonset: 2:15 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.3%

Best Times for Fishing or Hunting

Major Periods

12:34 AM - 3:04 PM
12:00 AM - 12:00 AM

Minor Periods

6:12 PM - 7:42 PM
1:45 AM - 3:15 AM

Action Rating: 3 out of 5

Monday, July 27, 2026

Weather Forecast

Sunny
85.5°F
54.7°F
68.3°F
72%
0.07 in
57%
0%
7.8 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 10.08 μg/m3
PM10: 11.63 μg/m3
Carbon Monoxide: 192.22 μg/m3
Nitrogen Dioxide: 14.2 μg/m3
Sulphur Dioxide: 0.99 μg/m3
Ozone: 53.89 μg/m3

Astronomical

Sunrise: 5:32 AM
Sun Transit: 12:51 AM
Sunset: 8:10 PM
Daylight: 14 hrs 38 mins
Moonrise: 7:23 PM
Moon Transit: 11:45 PM
Moonset: 3:11 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

1:25 PM - 3:55 PM
12:00 AM - 12:00 AM

Minor Periods

6:53 PM - 8:23 PM
2:41 AM - 4:11 AM

Action Rating: 3 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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