USGS · 01100000

MERRIMACK RIVER

USGS · 01100000LIVE

MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA

LOWELL, MA42.6459°N, -71.2984°W Updated 11 hr ago

FLOW RATE

4,681cfs

AIR TEMP

80°F

WIND

6mph WSW

FISH INDEX

56SCORE / 100

GOOD · 3 OF 5

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 YEAR

4,681cfs 44.6% vs avg

Optimal band: 2,648–3,582 cfs

PERIOD HIGH

29,059cfs

PERIOD LOW

660cfs

RUNNABLE

16%

last 1 year in band

Precipitation History

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Weather Conditions

WEATHER CONDITIONS

TODAY

98°

74°

FRI

98°

77°

SAT

90°

68°

SUN

88°

61°

MON

85°

62°

TUE

69°

58°

WED

67°

59°

TIME

THU

NOW

FRI

SAT

SUN

MON

TUE

TEMP

hourly forecast

96°

mild

96°

97°

98°

97°

95°

92°

89°

86°

84°

83°

82°

80°

79°

78°

77°

82°

86°

88°

91°

93°

95°

97°

98°

97°

96°

95°

92°

90°

87°

84°

83°

81°

79°

78°

77°

79°

82°

85°

88°

90°

85°

88°

81°

80°

83°

87°

81°

79°

75°

70°

68°

66°

65°

63°

62°

61°

62°

67°

72°

77°

80°

83°

85°

86°

87°

88°

87°

85°

79°

75°

73°

71°

70°

66°

64°

63°

62°

63°

67°

71°

75°

77°

83°

85°

83°

84°

85°

83°

81°

80°

78°

75°

71°

70°

69°

68°

67°

66°

WIND

mph · gust · dir

8mph WNW

G 16 mph

G16

WNW

G18

G17

G21

WSW

G20

WSW

G20

WSW

G20

WSW

G18

WSW

G20

WSW

G13

WSW

G13

G11

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

WSW

G17

WSW

G17

G18

G17

G21

G17

WNW

G13

WNW

G12

WNW

G13

WNW

G15

NNW

G15

NNW

G15

WNW

G16

G18

WNW

G15

NNW

G20

G22

G23

G22

G17

NNW

G15

NNW

G14

NNW

G15

NNW

G16

G13

G10

G12

NNW

G11

NNW

G11

ENE

G14

ESE

G15

SSE

G14

G11

SSW

WSW

G10

WSW

SSW

WSW

G10

ESE

G10

SSE

G13

G15

SSW

G15

SSW

G14

G13

SSW

G11

SSW

SSE

ESE

PRECIP

chance %

11%

26%

10%

30%

28%

33%

40%

29%

CLOUDS

cover %

clear

100%

18%

22%

87%

100%

93%

100%

81%

100%

97%

70%

11%

15%

58%

87%

77%

33%

100%

25%

14%

100%

87%

14%

10%

11%

12%

100%

98%

99%

94%

78%

84%

100%

98%

100%

91%

82%

100%

37%

100%

28%

100%

PRESSURE

hPa · trend

1011

TemperatureWind / GustsPrecipitationCloud coverPressure

Nowscroll →

FISH INDEX

Temperature

Too Hot

Wind

Light

Pressure

Stable

Moon Phase

Average

DAYLIGHT

SUNRISE

05:11 AM

SUNSET

08:26 PM

15H 15M OF DAYLIGHT8H 32M REMAINING

MOON PHASE

Waning Gibbous

93% illuminated

Station Location

42.6459, -71.2984

Loading map…

DATA · USGS · NOAA · NWSUPDATED 2026-07-02 11:54 UTC

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