Water Temperature of Stony Brook in Weston, MA

Current Water Temperature

47.8°F 8.8°C
Frigid Dangerously Cold
47.8°F
Frigid < 50°F
Cold 50°–60°
Cool 60°–70°
Comfortable 70°–80°
Warm 80°+

Severe hypothermia and cold water shock risk. Unprotected swimming causes rapid loss of dexterity in under 5 minutes.

Measurement Time: Friday, November 13, 2026, 12:10 AM EST

Temperature Locations

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Local Points of Interest

South Quarry Pond; Stony Brook Reservoir; Waltham, MA

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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

38.7°F
Light Drizzle
Conditions: Light Drizzle
Humidity: 93%
Feels Like: 31.1°F
Wind: NNE 11 mph
Wind Gusts: 24.4 mph
Pressure: 29.58 in
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 8 mi
UV Index: 0

Five-Day Weather Forecast

Dense Drizzle
Fri
H: 45°F
L: 35°F
Moderate Drizzle
Sat
H: 42°F
L: 32°F
Overcast
Sun
H: 47°F
L: 37°F
Sunny
Mon
H: 50°F
L: 37°F
Sunny
Tue
H: 56°F
L: 37°F

Air Quality

EPA Index 1 • Good

Air quality is satisfactory, and air pollution poses little or no risk.

PM2.5
2.6 μg/m³
Good
PM10
2.9 μg/m³
Good
Ozone (O3)
56 μg/m³
Photochemical
NO2
8.4 μg/m³
Nitrogen Dioxide
SO2
0.6 μg/m³
Sulfur Dioxide
CO
153 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 51m daylight
Sunrise 6:34 AM
Solar Noon 11:29 AM
Sunset 4:25 PM
Moon
Waxing Crescent • 13%
Moonrise 10:47 AM
Transit 3:05 PM
Moonset 7:27 PM

Best Times for Fishing or Hunting

Major Periods

2:10 AM - 4:40 AM
2:35 PM - 5:05 PM

Minor Periods

10:17 AM - 11:47 AM
6:57 PM - 8:27 PM
Action Rating:
Fair Action 2/5
Friday, November 13, 2026

Weather Forecast

Conditions: Dense Drizzle
Average Temperature: 38.7°F
Average Humidity: 89%
Chance of Rain: 97%
Wind: 11.9 mph
UV Index: 2.2

Air Quality

EPA Index 1 • Good
PM2.5
5.7 μg/m³
Good
PM10
5.9 μg/m³
Good
Ozone (O3)
47.2 μg/m³
Photochemical
NO2
17.1 μg/m³
Nitrogen Dioxide
SO2
0.9 μg/m³
Sulfur Dioxide
CO
183.5 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 51m daylight
Sunrise 6:34 AM
Solar Noon 11:29 AM
Sunset 4:25 PM
Moon
Waxing Crescent • 13%
Moonrise 10:47 AM
Transit 3:05 PM
Moonset 7:27 PM

Best Times for Fishing or Hunting

Major Periods

2:10 AM - 4:40 AM
2:35 PM - 5:05 PM

Minor Periods

10:17 AM - 11:47 AM
6:57 PM - 8:27 PM
Action Rating:
Fair Action 2/5
Saturday, November 14, 2026

Weather Forecast

Conditions: Moderate Drizzle
Average Temperature: 37.4°F
Average Humidity: 81%
Chance of Rain: 22%
Wind: 9.1 mph
UV Index: 3

Air Quality

EPA Index 1 • Good
PM2.5
4.5 μg/m³
Good
PM10
4.5 μg/m³
Good
Ozone (O3)
35.8 μg/m³
Photochemical
NO2
17.9 μg/m³
Nitrogen Dioxide
SO2
1.1 μg/m³
Sulfur Dioxide
CO
147.3 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 49m daylight
Sunrise 6:35 AM
Solar Noon 11:29 AM
Sunset 4:24 PM
Moon
Waxing Crescent • 21%
Moonrise 11:24 AM
Transit 3:54 PM
Moonset 8:30 PM

Best Times for Fishing or Hunting

Major Periods

2:59 AM - 5:29 AM
3:24 PM - 5:54 PM

Minor Periods

10:54 AM - 12:24 PM
8:00 PM - 9:30 PM
Action Rating:
Fair Action 2/5
Sunday, November 15, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 41°F
Average Humidity: 62%
Chance of Rain: 0%
Wind: 12.4 mph
UV Index: 3

Air Quality

EPA Index 1 • Good
PM2.5
2.2 μg/m³
Good
PM10
2.3 μg/m³
Good
Ozone (O3)
48.1 μg/m³
Photochemical
NO2
12.6 μg/m³
Nitrogen Dioxide
SO2
0.9 μg/m³
Sulfur Dioxide
CO
134.7 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 47m daylight
Sunrise 6:36 AM
Solar Noon 11:29 AM
Sunset 4:23 PM
Moon
Waxing Crescent • 31%
Moonrise 11:55 AM
Transit 4:40 PM
Moonset 9:33 PM

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

11:25 AM - 12:55 PM
9:03 PM - 10:33 PM
Action Rating:
Very Good 4/5
Monday, November 16, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 42.3°F
Average Humidity: 59%
Chance of Rain: 0%
Wind: 9.5 mph
UV Index: 2.9

Air Quality

EPA Index 1 • Good
PM2.5
4.2 μg/m³
Good
PM10
4.3 μg/m³
Good
Ozone (O3)
44.3 μg/m³
Photochemical
NO2
21.7 μg/m³
Nitrogen Dioxide
SO2
0.8 μg/m³
Sulfur Dioxide
CO
161.5 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 45m daylight
Sunrise 6:38 AM
Solar Noon 11:29 AM
Sunset 4:22 PM
Moon
First Quarter • 42%
Moonrise 12:21 PM
Transit 5:25 PM
Moonset 10:38 PM

Best Times for Fishing or Hunting

Major Periods

4:33 AM - 7:03 AM
4:55 PM - 7:25 PM

Minor Periods

11:51 AM - 1:21 PM
10:08 PM - 11:38 PM
Action Rating:
Good Action 3/5
Tuesday, November 17, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 45°F
Average Humidity: 54%
Chance of Rain: 0%
Wind: 7.1 mph
UV Index: 2.9

Air Quality

EPA Index 1 • Good
PM2.5
7.8 μg/m³
Good
PM10
8 μg/m³
Good
Ozone (O3)
36.8 μg/m³
Photochemical
NO2
29.1 μg/m³
Nitrogen Dioxide
SO2
1.4 μg/m³
Sulfur Dioxide
CO
233.9 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 43m daylight
Sunrise 6:39 AM
Solar Noon 11:30 AM
Sunset 4:22 PM
Moon
First Quarter • 54%
Moonrise 12:44 PM
Transit 6:08 PM
Moonset 11:42 PM

Best Times for Fishing or Hunting

Major Periods

5:16 AM - 7:46 AM
5:38 PM - 8:08 PM

Minor Periods

12:14 PM - 1:44 PM
11:12 PM - 12:42 AM
Action Rating:
Fair Action 2/5
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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