Water Temperature of Cambridge Reservoir in Lincoln, MA

Current Water Temperature

61.5°F

Measurement Time: Tuesday, May 19, 2026, 2:40 AM EDT

Temperature Locations

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Local Points of Interest

Hobbs Brook Basin

Cambridge Reservoir

Station Name: HOBBS BRK AT TRAPELO RD AT LINCOLN, MA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 167 feet

Nearest Address:
Trapelo Rd
Lincoln, MA 01773
Middlesex County

GPS Coordinates: 42.42166667, -71.2711111

Nearby Water Temperatures

Cambridge Reservoir Tributary 3, Waltham, MA (0.7 mi)
Hobbs Brook, Lincoln, MA (1 mi)
Cambridge Reservoir Tributary 1, Lexington, MA (1.1 mi)
Cambridge Reservoir Tributary 2, Lexington, MA (1.1 mi)
Stony Brook, Waltham, MA (1.6 mi)
Stony Brook, Weston, MA (2.7 mi)
Shawsheen River, Bedford, MA (3.1 mi)
Stony Brook Tributary, Waltham, MA (3.4 mi)
Stony Brook Tributary, Weston, MA (3.5 mi)
Stony Brook, Weston, MA (3.6 mi)
Stony Brook Reservoir Tributary, Weston, MA (4.6 mi)
Fresh Pond, Cambridge, MA (6.9 mi)
Nashua River, Clinton, MA (20.1 mi)
Gates Brook, West Boylston, MA (26 mi)
Stillwater River, Sterling, MA (26.5 mi)

Weather for Lincoln, Massachusetts

Current Weather

72°F
Sunny
Sunny
76.4°F
76.6°F
76%
SW 7.2 mph
11.9 mph
74.5°F
62.3°F
0 in
0%
9 mi
1017 mbar
0.5

Five Day Weather Forecast

Patchy rain nearby
Tue
H: 99°F
L: 63°F
Sunny
Wed
H: 91°F
L: 61°F
Sunny
Thu
H: 68°F
L: 50°F
Sunny
Fri
H: 70°F
L: 43°F
Sunny
Sat
H: 65°F
L: 49°F

Air Quality

AQI: 1 - Good
PM2.5: 13.75 μg/m3
PM10: 15.95 μg/m3
Carbon Monoxide: 207.85 μg/m3
Nitrogen Dioxide: 5.25 μg/m3
Sulphur Dioxide: 2.35 μg/m3
Ozone: 152 μg/m3

Astronomical

Sunrise: 5:19 AM
Sun Transit: 12:41 AM
Sunset: 8:04 PM
Daylight: 14 hrs 45 mins
Moonrise: 7:30 AM
Moon Transit: 3:44 PM
Moonset: 11:52 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.4%

Best Times for Fishing or Hunting

Major Periods

5:18 AM - 7:48 AM
3:14 PM - 5:44 PM

Minor Periods

12:00 AM - 12:00 AM
7:00 AM - 8:30 AM

Action Rating: 3 out of 5

Heat Advisory issued May 18 at 12:57PM EDT until May 20 at 8:00PM EDT by NWS Boston/Norton MA

Effective: Mon May 18, 2026, 12:57 PM
Expires: Tue May 19, 2026, 7:00 AM

* WHAT...Heat index values up to 96 expected. * WHERE...Much of Southern New England, except for the eastern slopes of the Berkshires, the Rhode Island and Massachusetts South Coast, Cape Cod and the Islands. * WHEN...From 11 AM Tuesday to 8 PM EDT Wednesday. * IMPACTS...Hot temperatures, a moderate degree of humidity with little relief Tuesday night may cause heat illnesses. * ADDITIONAL DETAILS...This is the first multi-day period of hot temperatures. Those not yet accustomed to hot temperatures with a moderate degree of humidity should take appropriate heat-related precautions.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives, neighbors and pets. 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 May 19 at 1:59AM EDT until May 20 at 8:00PM EDT by NWS Boston/Norton MA

Effective: Tue May 19, 2026, 1:59 AM
Expires: Tue May 19, 2026, 5:00 PM

* WHAT...Heat index values up to 96 expected. * WHERE...Much of Southern New England, except for the eastern slopes of the Berkshires, the Rhode Island and Massachusetts South Coast, Cape Cod and the Islands. * WHEN...From 11 AM this morning to 8 PM EDT Wednesday. * IMPACTS...Hot temperatures, a moderate degree of humidity with little relief Tuesday night 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.


Air Quality Alert issued May 18 at 11:21PM EDT by NWS Boston/Norton MA

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Mon May 18, 2026, 11:21 PM
Expires: Tue May 19, 2026, 11:15 PM

The Massachusetts Department of Environmental Protection has issued an Air Quality Alert for Ground Level Ozone, from 11 AM to 11 PM EDT Tuesday. An Air Quality Alert day means that Ground Level Ozone concentrations within the region may approach or exceed levels that are Unhealthy for Sensitive Groups. Air is unhealthy for sensitive children and adults, such as those with asthma, lung or heart disease, and older adults. Sensitive children and adults should limit prolonged outdoor activity. For additional information, please visit the Massachusetts Department of Environmental Protection website at: https://mass.gov/dep/massair/forecast


Air Quality Alert issued May 18 at 3:50PM EDT by NWS Gray ME

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Mon May 18, 2026, 3:50 PM
Expires: Tue May 19, 2026, 10:00 PM

The New Hampshire Department of Environmental Services has issued an Air Quality Alert for ozone in from 10 AM to 10 PM EDT Tuesday. Ozone levels in Rockingham County are expected to rise into the Unhealthy for Sensitive Groups range. The New Hampshire Department of Environmental Services is predicting unhealthy air quality for sensitive individuals in the above- mentioned counties. Sensitive individuals include children and older adults; anyone with lung disease such as asthma, emphysema, and bronchitis; and people who are active outdoors. Even healthy individuals may experience mild health effects and should consider limiting strenuous or prolonged outdoor activities. For additional information, please visit the New Hampshire Department of Environmental Prediction website at, https://www4.des.state.nh.us/airdata/


Air Quality Alert issued May 18 at 11:21PM EDT by NWS Boston/Norton MA

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Mon May 18, 2026, 11:21 PM
Expires: Tue May 19, 2026, 11:15 PM

The Rhode Island Department of Environmental Management has issued an Air Quality Alert Day for Ground Level Ozone, from 11 AM to 11 PM EDT Tuesday. An Air Quality Alert day means that Ground Level Ozone concentrations within the region may approach or exceed unhealthy standards. For additional information, please visit the Rhode Island Department of Environmental Management website at: https://dem.ri.gov/environmental-protection-bureau/air- resources/air-quality-forecast


Tuesday, May 19, 2026

Weather Forecast

Patchy rain nearby
99.3°F
63.1°F
78.8°F
65%
0.02 in
76%
0%
13 mph
8.5


Air Quality

AQI: 1 - Good
PM2.5: 13.6 μg/m3
PM10: 16.08 μg/m3
Carbon Monoxide: 193.93 μg/m3
Nitrogen Dioxide: 9.05 μg/m3
Sulphur Dioxide: 2.3 μg/m3
Ozone: 117.08 μg/m3

Astronomical

Sunrise: 5:19 AM
Sun Transit: 12:41 AM
Sunset: 8:04 PM
Daylight: 14 hrs 45 mins
Moonrise: 7:30 AM
Moon Transit: 3:44 PM
Moonset: 11:52 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.4%

Best Times for Fishing or Hunting

Major Periods

5:18 AM - 7:48 AM
3:14 PM - 5:44 PM

Minor Periods

12:00 AM - 12:00 AM
7:00 AM - 8:30 AM

Action Rating: 3 out of 5

Wednesday, May 20, 2026

Weather Forecast

Sunny
90.5°F
61.2°F
75.4°F
64%
0 in
0%
0%
15.7 mph
8.7


Air Quality

AQI: 1 - Good
PM2.5: 9.35 μg/m3
PM10: 10.84 μg/m3
Carbon Monoxide: 185.21 μg/m3
Nitrogen Dioxide: 9.49 μg/m3
Sulphur Dioxide: 1.96 μg/m3
Ozone: 97.6 μg/m3

Astronomical

Sunrise: 5:18 AM
Sun Transit: 12:41 AM
Sunset: 8:05 PM
Daylight: 14 hrs 47 mins
Moonrise: 8:47 AM
Moon Transit: 4:47 PM
Moonset: 12:52 AM
Moon Phase: Waxing Crescent
Moon Illumination: 14.4%

Best Times for Fishing or Hunting

Major Periods

6:22 AM - 8:52 AM
4:17 PM - 6:47 PM

Minor Periods

8:17 AM - 9:47 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, May 21, 2026

Weather Forecast

Sunny
67.6°F
49.7°F
58.6°F
38%
0 in
0%
0%
11 mph
1.5


Air Quality

AQI: 1 - Good
PM2.5: 3.4 μg/m3
PM10: 3.68 μg/m3
Carbon Monoxide: 136.47 μg/m3
Nitrogen Dioxide: 6.24 μg/m3
Sulphur Dioxide: 1.54 μg/m3
Ozone: 80.52 μg/m3

Astronomical

Sunrise: 5:18 AM
Sun Transit: 12:41 AM
Sunset: 8:06 PM
Daylight: 14 hrs 49 mins
Moonrise: 10:06 AM
Moon Transit: 5:43 PM
Moonset: 12:34 AM
Moon Phase: Waxing Crescent
Moon Illumination: 23.2%

Best Times for Fishing or Hunting

Major Periods

7:21 AM - 9:51 AM
5:13 PM - 7:43 PM

Minor Periods

9:36 AM - 11:06 AM
12:04 AM - 1:34 AM

Action Rating: 3 out of 5

Friday, May 22, 2026

Weather Forecast

Sunny
70°F
42.6°F
56.9°F
43%
0 in
0%
0%
9.4 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 5.89 μg/m3
PM10: 6.37 μg/m3
Carbon Monoxide: 159.6 μg/m3
Nitrogen Dioxide: 9.59 μg/m3
Sulphur Dioxide: 1.94 μg/m3
Ozone: 78.76 μg/m3

Astronomical

Sunrise: 5:17 AM
Sun Transit: 12:41 AM
Sunset: 8:07 PM
Daylight: 14 hrs 50 mins
Moonrise: 11:22 AM
Moon Transit: 6:34 PM
Moonset: 1:07 AM
Moon Phase: Waxing Crescent
Moon Illumination: 33.4%

Best Times for Fishing or Hunting

Major Periods

8:14 AM - 10:44 AM
6:04 PM - 8:34 PM

Minor Periods

10:52 AM - 12:22 AM
12:37 AM - 2:07 AM

Action Rating: 3 out of 5

Saturday, May 23, 2026

Weather Forecast

Sunny
64.5°F
49.1°F
56.4°F
56%
0 in
0%
0%
10.5 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 9.22 μg/m3
PM10: 11.07 μg/m3
Carbon Monoxide: 179.93 μg/m3
Nitrogen Dioxide: 15.43 μg/m3
Sulphur Dioxide: 1.78 μg/m3
Ozone: 61.15 μg/m3

Astronomical

Sunrise: 5:16 AM
Sun Transit: 12:41 AM
Sunset: 8:08 PM
Daylight: 14 hrs 52 mins
Moonrise: 12:34 AM
Moon Transit: 7:20 PM
Moonset: 1:32 AM
Moon Phase: First Quarter
Moon Illumination: 44.4%

Best Times for Fishing or Hunting

Major Periods

9:02 AM - 11:32 AM
6:50 PM - 9:20 PM

Minor Periods

12:04 AM - 1:34 PM
1:02 AM - 2:32 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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