USGS · 01100000

MERRIMACK RIVER

USGS · 01100000LIVE

MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA

LOWELL, MA42.6459°N, -71.2984°W Updated 1 hr ago

FLOW RATE

4,620cfs

GAUGE HT

43.13ft

AIR TEMP

76°F

WIND

4mph SW

FISH INDEX

75SCORE / 100

GREAT · 4 OF 5

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 DAY

4,620cfs 9.8% vs avg

Optimal band: 4,012–5,428 cfs

PERIOD HIGH

5,310cfs

PERIOD LOW

4,620cfs

RUNNABLE

100%

last 1 day in band

Gauge Height

43.13ft

Precipitation History

Your History · MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA

Track your history

Sign in to track your sessions at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA — best days, monthly trends, and time on the water.

SPONSORED

Weather Conditions

WEATHER CONDITIONS

TODAY

98°

74°

FRI

98°

77°

SAT

96°

73°

SUN

89°

65°

MON

84°

62°

TUE

75°

56°

WED

81°

52°

TIME

THU

NOW

FRI

SAT

SUN

MON

TUE

TEMP

hourly forecast

92°

mild

92°

95°

96°

98°

97°

95°

92°

89°

86°

85°

83°

82°

80°

79°

78°

77°

82°

86°

88°

91°

93°

95°

97°

98°

97°

96°

95°

92°

90°

87°

84°

82°

80°

79°

77°

76°

80°

83°

86°

89°

92°

94°

95°

96°

95°

75°

78°

77°

76°

75°

74°

73°

72°

70°

68°

66°

65°

69°

74°

78°

81°

84°

86°

87°

89°

86°

82°

78°

73°

70°

69°

67°

66°

65°

64°

63°

62°

63°

67°

71°

75°

78°

80°

83°

84°

82°

80°

78°

75°

71°

70°

69°

68°

67°

66°

WIND

mph · gust · dir

9mph WNW

G 18 mph

G18

WNW

G19

WNW

G21

G19

WSW

G17

WSW

G22

WSW

G19

WSW

G19

WSW

G18

WSW

G13

WSW

G14

WSW

G13

WSW

G13

G14

G11

SSW

G11

G12

G11

G10

WSW

G13

G21

WNW

G16

WNW

G17

WNW

G18

WNW

G20

G19

G20

G24

G22

G20

G21

G20

G18

WSW

G24

G21

G15

WSW

G14

G16

G17

WSW

G17

WSW

G18

G17

G21

G17

WNW

G13

WNW

G12

WNW

G13

WNW

G15

WNW

G15

WNW

G15

WNW

G15

WNW

G16

WNW

G18

NNW

G15

NNW

WSW

G20

G22

G23

NNW

G22

G17

G15

G14

G15

NNW

G16

NNW

G13

NNW

G10

NNW

G12

G11

NNE

ESE

G11

G14

G15

SSE

G14

SSE

G11

SSW

G10

SSW

SSE

G10

SSE

G10

SSW

G10

G13

G15

G14

G13

SSW

G11

SSE

PRECIP

chance %

11%

26%

10%

30%

28%

33%

40%

29%

CLOUDS

cover %

clear

18%

22%

87%

100%

93%

100%

90%

88%

100%

14%

17%

19%

21%

32%

25%

100%

25%

100%

47%

100%

13%

79%

100%

78%

100%

11%

12%

57%

35%

22%

51%

11%

12%

13%

100%

68%

100%

PRESSURE

hPa · trend

1012

TemperatureWind / GustsPrecipitationCloud coverPressure

Nowscroll →

FISH INDEX

Temperature

Warm

Wind

Calm

Pressure

Stable

Moon Phase

Average

DAYLIGHT

SUNRISE

05:11 AM

SUNSET

08:26 PM

15H 15M OF DAYLIGHT9H 44M REMAINING

MOON PHASE

Waning Gibbous

94% illuminated

Station Location

42.6459, -71.2984

Loading map…

DATA · USGS · NOAA · NWSUPDATED 2026-07-02 10:42 UTC

Site #01100000·USGS

Create a free account to save favorites, set flow alerts, and track conditions