USGS · 01100000

MERRIMACK RIVER

USGS · 01100000LIVE

MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA

LOWELL, MA42.6459°N, -71.2984°W Updated 17 hr ago

FLOW RATE

2,632cfs

GAUGE HT

42.32ft

AIR TEMP

83°F

WIND

5mph NE

FISH INDEX

56SCORE / 100

GOOD · 3 OF 5

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 YEAR

2,632cfs 44.3% vs avg

Optimal band: 2,761–3,735 cfs

PERIOD HIGH

29,059cfs

PERIOD LOW

660cfs

RUNNABLE

16%

last 1 year in band

Gauge Height

42.32ft

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

85°

59°

MON

89°

61°

TUE

98°

68°

WED

92°

78°

THU

90°

61°

FRI

72°

56°

SAT

81°

53°

TIME

SUN

NOW

MON

TUE

WED

THU

FRI

TEMP

hourly forecast

83°

mild

83°

81°

79°

75°

72°

70°

69°

67°

66°

65°

64°

63°

62°

61°

67°

73°

78°

81°

84°

86°

88°

89°

88°

87°

82°

77°

75°

72°

71°

72°

71°

68°

72°

78°

83°

86°

88°

91°

95°

97°

98°

97°

95°

92°

89°

88°

87°

86°

85°

83°

84°

80°

78°

80°

83°

85°

88°

87°

89°

91°

92°

89°

85°

80°

78°

79°

78°

76°

73°

71°

69°

67°

70°

75°

80°

84°

87°

89°

90°

87°

70°

68°

67°

70°

66°

63°

61°

60°

59°

58°

57°

58°

61°

63°

66°

69°

71°

72°

WIND

mph · gust · dir

9mph SE

G 12 mph

G12

G14

G13

ESE

G14

ESE

G12

G13

SSE

G12

SSE

G11

SSE

G12

SSE

G10

SSE

G10

SSE

G17

SSW

G17

G15

G12

SSW

G12

G13

SSW

G13

SSW

G16

SSW

G18

G19

G17

SSW

G28

SSW

G28

SSW

G30

SSW

G29

SSW

G27

SSW

G22

SSW

G19

SSW

G20

SSW

G15

G13

G15

SSW

G22

WSW

G20

WSW

G20

WSW

G19

G21

WSW

G23

G24

G27

G28

G29

G31

G32

WNW

G31

WNW

G22

WNW

G20

WNW

G24

G28

G26

G21

WNW

G20

G16

G20

G21

WNW

G21

G20

G19

WNW

G14

G10

G23

G25

G19

WSW

G18

G14

WSW

G14

G13

G17

G19

G21

WSW

G21

G18

NNW

G14

NNE

ENE

SSE

NNW

G12

NNW

WNW

G11

WNW

G18

G22

G20

G17

G16

G15

NNW

G15

NNW

G15

NNW

PRECIP

chance %

10%

CLOUDS

cover %

33%

few

33%

27%

100%

45%

17%

23%

26%

22%

69%

100%

97%

12%

100%

78%

49%

55%

75%

72%

100%

86%

94%

100%

10%

100%

95%

100%

34%

100%

25%

11%

30%

PRESSURE

hPa · trend

1020

TemperatureWind / GustsPrecipitationCloud coverPressure

Nowscroll →

FISH INDEX

Temperature

Too Hot

Wind

Light

Pressure

Stable

Moon Phase

Average

DAYLIGHT

SUNRISE

05:18 AM

SUNSET

08:22 PM

15H 4M OF DAYLIGHT

MOON PHASE

Waning Crescent

5% illuminated

Station Location

42.6459, -71.2984

Loading map…

DATA · USGS · NOAA · NWSUPDATED 2026-07-12 00:00 UTC

Site #01100000·USGS

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