MEDIAN FLOW RATE · 30 DAY
55cfs 65.2% vs avg
Optimal band: 62–84 cfs
PERIOD HIGH
115cfs
PERIOD LOW
43cfs
RUNNABLE
27%
last 30 day in band
Precipitation History
Precipitation · YTD
DryDrier than normal
2026 to date
17.4in
-16% vs normal
17.45 in of precipitation so far this year, 16% below the 30-year normal of 20.73 in for this point in the season.
YTD Total
17.4in
This year so far
Normal to Date
20.7in
30-yr average
Typical Range
15.4–26.8in
10th–90th pct YTD
Departure
-16%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 3.25" · normal 3.42" (2.0–5.0)
Feb: 2.26" · normal 3.09" (1.7–4.4)
Mar: 4.17" · normal 4.32" (2.4–6.3)
Apr: 2.58" · normal 3.72" (2.0–6.0)
May: 2.83" · normal 3.02" (1.4–4.5)
Jun: 2.37" (so far)· normal 3.55" (1.4–6.5)
Jul: normal 3.06" (1.6–4.9)
Aug: normal 3.49" (1.6–5.7)
Sep: normal 3.50" (1.5–6.7)
Oct: normal 3.97" (1.3–6.4)
Nov: normal 3.44" (1.7–5.0)
Dec: normal 4.24" (2.4–6.6)
Baseline 1991–2020 · Source: Open-Meteo12:12 AM
Your History · CHARLES RIVER AT WALTHAM, MA
Track your history
Sign in to track your sessions at CHARLES RIVER AT WALTHAM, MA — best days, monthly trends, and time on the water.
Sign inSPONSORED
Weather Conditions
WEATHER CONDITIONS
TODAY
85°
59°
FRI
80°
66°
SAT
79°
62°
SUN
81°
59°
MON
86°
62°
TUE
90°
64°
WED
76°
62°
FISH INDEX
Temperature
Warm
Wind
Calm
Pressure
Stable
Moon Phase
Average
DAYLIGHT
SUNRISE
05:09 AM
SUNSET
08:25 PM
15H 16M OF DAYLIGHT20H 13M REMAINING
MOON PHASE
Waxing Gibbous
83% illuminated
Station Location
42.3723, -71.2337Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-06-26 00:12 UTC
Site #01104500·USGS
Create a free account to save favorites, set flow alerts, and track conditions