Cambridge Reservoir

River in Massachusetts, read from 3 USGS gauges, draining about 1 square miles. Figures refresh every fifteen minutes.

Discharge

0.09 cfs

· 1h ago

Normal for today

0.2

cfs median, 14 yrs

Water temp

°F · 1h ago

Gage height

1.09

Below normal for the date50% of medianUSGS gauge 01104420

Thirty-day mean discharge · 0.0–2.9 cfsdashed line: today’s long-term median

Gauges on this water

Reading by reach

Station	Flow	Temp	Updated
CAMBRIDGE RES., UNNAMED TRIB 3, NR LEXINGTON, MA01104420	0.09 cfs	57°F	1h ago
CAMBRIDGE RES., UNNAMED TRIB 2, NR LEXINGTON, MA01104415	0.04 cfs	55°F	1h ago
CAMBRIDGE RES., UNNAMED TRIB 1, NR LEXINGTON, MA01104410	0.06 cfs	57°F	4022d ago

Reading the number

On this date the gauge has averaged 0.2 cfs over 14 years of record, with the middle half of years falling between 0.1 and 0.9 cfs. Today is below that band: lower, clearer and, in summer, warmer water than a typical October day here.

Regional hatch calendar

What is likely hatching near Cambridge Reservoir

Cambridge Reservoir does not have its own verified chart yet. This calendar is combined from the verified charts on Millers River (61 mi), West Branch Farmington River (96 mi), Saco River (108 mi). Treat it as regional timing, and file a report if you see something different here.

Month-by-month insect activity for Cambridge Reservoir
Insect	J	F	M	A	M	J	J	A	S	O	N	D
Blue-Winged Olive	January: absent	February: absent	March: active	April: peak	May: active	June: active	July: active	August: active	September: peak	October: peak	November: active	December: absent
Caddis	January: absent	February: absent	March: absent	April: active	May: peak	June: peak	July: active	August: active	September: peak	October: active	November: absent	December: absent
Hendrickson	January: absent	February: absent	March: absent	April: peak	May: peak	June: active	July: absent	August: absent	September: absent	October: absent	November: absent	December: absent
Light Cahill	January: absent	February: absent	March: absent	April: absent	May: absent	June: peak	July: active	August: active	September: active	October: absent	November: absent	December: absent
Terrestrials	January: absent	February: absent	March: absent	April: absent	May: absent	June: active	July: peak	August: peak	September: peak	October: active	November: absent	December: absent
Golden Stonefly	January: absent	February: absent	March: absent	April: absent	May: active	June: peak	July: active	August: absent	September: absent	October: absent	November: absent	December: absent
Sulphur	January: absent	February: absent	March: absent	April: absent	May: peak	June: peak	July: active	August: absent	September: absent	October: absent	November: absent	December: absent
Trico	January: absent	February: absent	March: absent	April: absent	May: absent	June: active	July: peak	August: peak	September: active	October: absent	November: absent	December: absent
Brown Drake	January: absent	February: absent	March: absent	April: absent	May: active	June: peak	July: active	August: absent	September: absent	October: absent	November: absent	December: absent
Gray Drake	January: absent	February: absent	March: absent	April: absent	May: active	June: peak	July: active	August: absent	September: absent	October: absent	November: absent	December: absent
Green Drake	January: absent	February: absent	March: absent	April: absent	May: absent	June: peak	July: absent	August: absent	September: absent	October: absent	November: absent	December: absent
Isonychia	January: absent	February: absent	March: absent	April: absent	May: absent	June: active	July: active	August: active	September: peak	October: active	November: absent	December: absent

PeakActiveAbsent

Reports

From anglers on Cambridge Reservoir

No reports filed here yet. The first one becomes the page’s local knowledge, stamped with the flow at the time. File a report.