Water Temperature of Stony Brook in Waltham, MA

Current Water Temperature

72.5°F

Measurement Time: Friday, August 22, 2025, 1:10 PM EDT

Temperature Locations

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Local Points of Interest

Cambridge Reservoir (Hobbs Brook Basin)

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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 / 51 meters

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 (2.0 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 (3.0 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

82°F
Partly cloudy
Conditions: Partly cloudy
Humidity: 34%
Feels Like: 81.1°F
Wind: ESE 6.9 mph
Wind Gusts: 8.4 mph
Pressure: 29.95 in
Precipitation: 0 in
Cloud Cover: 75%
Visibility: 9 mi
UV Index: 1.7

Five Day Weather Forecast

Sunny
Fri
H: 87°F
L: 55°F
Sunny
Sat
H: 90°F
L: 64°F
Sunny
Sun
H: 83°F
L: 66°F
Patchy rain nearby
Mon
H: 80°F
L: 62°F
Sunny
Tue
H: 78°F
L: 55°F

Air Quality

AQI: 1 - Good
PM2.5: 24.24 μg/m3
PM10: 24.42 μg/m3
Carbon Monoxide: 606.8 μg/m3
Nitrogen Dioxide: 53.47 μg/m3
Sulphur Dioxide: 6.85 μg/m3
Ozone: 89 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 12:47 AM
Sunset: 7:35 PM
Daylight: 13 hrs 35 mins
Moonrise: 5:03 AM
Moon Transit: 12:24 AM
Moonset: 7:31 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

2:04 AM - 4:34 AM
11:54 AM - 2:24 PM

Minor Periods

7:01 PM - 8:31 PM
4:33 AM - 6:03 AM

Action Rating: 4 out of 5

Coastal Flood Statement issued August 22 at 2:21AM EDT until August 23 at 2:00AM EDT by NWS Boston/Norton MA

Effective: Fri August 22, 2025, 2:21 AM
Expires: Fri August 22, 2025, 4:00 PM

* WHAT...Large breaking waves of 10 to 15 feet on ocean beaches. Some splashover on vulnerable coastal roads around high tide tonight through Friday night. * WHERE...Suffolk MA and Eastern Norfolk MA Counties. * WHEN...Through late tonight. * IMPACTS...Some water on low lying roads and property.

Do not drive through flooded roadways.


Coastal Flood Statement issued August 22 at 2:21AM EDT until August 23 at 2:00AM EDT by NWS Boston/Norton MA

Effective: Fri August 22, 2025, 2:21 AM
Expires: Fri August 22, 2025, 4:00 PM

* WHAT...Large breaking waves of 10 to 15 feet on ocean beaches. Some splashover on vulnerable coastal roads around high tide tonight through Friday night. * WHERE...Suffolk MA and Eastern Norfolk MA Counties. * WHEN...Through late tonight. * IMPACTS...Some water on low lying roads and property.

Do not drive through flooded roadways.


Coastal Flood Statement issued August 22 at 2:21AM EDT until August 23 at 2:00AM EDT by NWS Boston/Norton MA

Effective: Fri August 22, 2025, 2:21 AM
Expires: Fri August 22, 2025, 4:00 PM

* WHAT...Large breaking waves of 10 to 15 feet on ocean beaches. Some splashover on vulnerable coastal roads around high tide tonight through Friday night. * WHERE...Suffolk MA and Eastern Norfolk MA Counties. * WHEN...Through late tonight. * IMPACTS...Some water on low lying roads and property.

Do not drive through flooded roadways.


Coastal Flood Statement issued August 22 at 2:21AM EDT until August 23 at 2:00AM EDT by NWS Boston/Norton MA

Effective: Fri August 22, 2025, 2:21 AM
Expires: Fri August 22, 2025, 4:00 PM

* WHAT...Large breaking waves of 10 to 15 feet on ocean beaches. Some splashover on vulnerable coastal roads around high tide tonight through Friday night. * WHERE...Eastern Essex MA and Eastern Plymouth MA Counties. * WHEN...For the High Surf Advisory, until 8 PM EDT Saturday. For the Coastal Flood Statement, through late tonight. * IMPACTS...Roads remain passable. Shallow pockets of flooding less than one foot deep affect more vulnerable coastal roads along the North Shore from Salem and Gloucester to Newburyport. Rough surf will likely cause some splashover onto coastal roads around the time of high tide. Dangerous swimming and surfing conditions and localized beach erosion.

Do not drive through flooded roadways. Inexperienced swimmers should remain out of the water due to dangerous surf conditions.


High Surf Advisory issued August 22 at 2:21AM EDT until August 23 at 8:00PM EDT by NWS Boston/Norton MA

Effective: Fri August 22, 2025, 2:21 AM
Expires: Fri August 22, 2025, 4:00 PM

* WHAT...Large breaking waves of 10 to 15 feet on ocean beaches. Some splashover on vulnerable coastal roads around high tide tonight through Friday night. * WHERE...Eastern Essex MA and Eastern Plymouth MA Counties. * WHEN...For the High Surf Advisory, until 8 PM EDT Saturday. For the Coastal Flood Statement, through late tonight. * IMPACTS...Roads remain passable. Shallow pockets of flooding less than one foot deep affect more vulnerable coastal roads along the North Shore from Salem and Gloucester to Newburyport. Rough surf will likely cause some splashover onto coastal roads around the time of high tide. Dangerous swimming and surfing conditions and localized beach erosion.

Do not drive through flooded roadways. Inexperienced swimmers should remain out of the water due to dangerous surf conditions.
Friday, August 22, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 70.3°F
Average Humidity: 58%
Chance of Rain: 0%
Wind: 8.3 mph
UV Index: 2.1

Air Quality

AQI: 1 - Good
PM2.5: 11.62 μg/m3
PM10: 12.67 μg/m3
Carbon Monoxide: 359.86 μg/m3
Nitrogen Dioxide: 16.41 μg/m3
Sulphur Dioxide: 4.01 μg/m3
Ozone: 87 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 12:47 AM
Sunset: 7:35 PM
Daylight: 13 hrs 35 mins
Moonrise: 5:03 AM
Moon Transit: 12:24 AM
Moonset: 7:31 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

2:04 AM - 4:34 AM
11:54 AM - 2:24 PM

Minor Periods

7:01 PM - 8:31 PM
4:33 AM - 6:03 AM

Action Rating: 4 out of 5

Saturday, August 23, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 74.7°F
Average Humidity: 57%
Chance of Rain: 0%
Wind: 13.4 mph
UV Index: 1.6

Air Quality

AQI: 2 - Moderate
PM2.5: 21.46 μg/m3
PM10: 21.65 μg/m3
Carbon Monoxide: 462.8 μg/m3
Nitrogen Dioxide: 31.41 μg/m3
Sulphur Dioxide: 6.22 μg/m3
Ozone: 103.08 μg/m3

Astronomical

Sunrise: 6:01 AM
Sun Transit: 12:47 AM
Sunset: 7:33 PM
Daylight: 13 hrs 32 mins
Moonrise: 6:14 AM
Moon Transit: 1:10 PM
Moonset: 7:53 PM
Moon Phase: New
Moon Illumination: 1.4%

Best Times for Fishing or Hunting

Major Periods

2:52 AM - 5:22 AM
12:40 AM - 3:10 PM

Minor Periods

7:23 PM - 8:53 PM
5:44 AM - 7:14 AM

Action Rating: 5 out of 5

Sunday, August 24, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 73.9°F
Average Humidity: 69%
Chance of Rain: 0%
Wind: 12.1 mph
UV Index: 1.7

Air Quality

AQI: 1 - Good
PM2.5: 15.1 μg/m3
PM10: 17.23 μg/m3
Carbon Monoxide: 354.24 μg/m3
Nitrogen Dioxide: 16.32 μg/m3
Sulphur Dioxide: 4.97 μg/m3
Ozone: 101.6 μg/m3

Astronomical

Sunrise: 6:02 AM
Sun Transit: 12:47 AM
Sunset: 7:32 PM
Daylight: 13 hrs 29 mins
Moonrise: 7:22 AM
Moon Transit: 1:53 PM
Moonset: 8:12 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

3:36 AM - 6:06 AM
1:23 PM - 3:53 PM

Minor Periods

7:42 PM - 9:12 PM
6:52 AM - 8:22 AM

Action Rating: 5 out of 5

Monday, August 25, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 71.6°F
Average Humidity: 83%
Chance of Rain: 70%
Wind: 8.7 mph
UV Index: 1.4

Air Quality

AQI: 1 - Good
PM2.5: 13.73 μg/m3
PM10: 17.97 μg/m3
Carbon Monoxide: 308.65 μg/m3
Nitrogen Dioxide: 18.12 μg/m3
Sulphur Dioxide: 3.92 μg/m3
Ozone: 71.64 μg/m3

Astronomical

Sunrise: 6:03 AM
Sun Transit: 12:47 AM
Sunset: 7:30 PM
Daylight: 13 hrs 27 mins
Moonrise: 8:27 AM
Moon Transit: 2:34 PM
Moonset: 8:31 PM
Moon Phase: New
Moon Illumination: 1.9%

Best Times for Fishing or Hunting

Major Periods

4:17 AM - 6:47 AM
2:04 PM - 4:34 PM

Minor Periods

8:01 PM - 9:31 PM
7:57 AM - 9:27 AM

Action Rating: 3 out of 5

Tuesday, August 26, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 66.2°F
Average Humidity: 54%
Chance of Rain: 0%
Wind: 11.6 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 13.36 μg/m3
PM10: 14.5 μg/m3
Carbon Monoxide: 377.26 μg/m3
Nitrogen Dioxide: 24.99 μg/m3
Sulphur Dioxide: 4.71 μg/m3
Ozone: 66.31 μg/m3

Astronomical

Sunrise: 6:04 AM
Sun Transit: 12:46 AM
Sunset: 7:28 PM
Daylight: 13 hrs 24 mins
Moonrise: 9:30 AM
Moon Transit: 3:14 PM
Moonset: 8:49 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.1%

Best Times for Fishing or Hunting

Major Periods

4:58 AM - 7:28 AM
2:44 PM - 5:14 PM

Minor Periods

8:19 PM - 9:49 PM
9:00 AM - 10:30 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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