Merrimack River Entrance Sea Conditions and Tide Table

Merrimack River Entrance Sea Conditions table showing wave height, swell direction and period.

High and low tide times are also provided on the table along with the moon phase and forecast weather. Sunrise today is at 07:03 AM and sunset is at 06:44 PM.

Days 1–3 Weather Summary

Light rain (total 3mm) at first, then becoming colder with a dusting of snow on Thu night. Icy conditions (max 16°C on Wed night, min -2°C on Thu night). Mainly fresh winds.

Days 4–6 Weather Summary

Heavy rain (total 39mm), heaviest during Mon morning. Icy conditions (max 14°C on Mon afternoon, min -4°C on Sat night). Winds decreasing (strong winds from the W on Sat morning, light winds from the NW by Sun morning).

Days 7–9 Weather Summary

Mostly dry. Freeze-thaw conditions (max 3°C on Tue afternoon, min -5°C on Tue night). Wind will be generally light.

Days 10–12 Weather Summary

Some drizzle, heaviest during Sat morning. Freeze-thaw conditions (max 9°C on Sat afternoon, min -1°C on Fri morning). Winds decreasing (fresh winds from the SW on Sat morning, calm by Sun night).

Wednesday
11
Thursday
12
Friday
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Wednesday
25
Thu
26
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
Wave Height Map
High Tide
Low Tide
Wave
height (m) 
direction
period (s) 
1.1
ENE
5
1
ENE
6
1.1
E
6
0.9
SE
7
0.7
SW
5
0.9
NW
4
0.5
SE
10
0.6
SSE
5
1.2
SSE
6
1.3
WSW
4
1
W
4
0.5
WNW
3
0.2
ESE
10
0.2
ESE
4
1.3
SE
6
2.2
SE
8
2.3
SE
8
1.7
SE
10
1.2
ESE
10
1.1
SE
11
1.1
SE
10
0.9
ESE
10
0.7
ESE
10
0.8
ESE
10
0.7
ESE
9
0.7
ESE
9
0.7
ESE
9
0.8
ESE
8
1
ESE
8
1.1
ESE
10
1.2
E
10
0.9
E
10
0.7
E
9
0.7
NW
4
0.4
ESE
9
0.4
ESE
9
0.7
SE
4
0.6
SE
4
0.5
SE
5
0.4
ESE
6
0.9
SSE
4
1.3
S
5
1
SE
8
0.9
SSW
5
0.9
SSW
5
0.7
SSW
5
0.7
W
3
cloud
part cloud
cloud
light rain
light rain
snow showers
clear
cloud
rain showers
clear
clear
part cloud
cloud
cloud
light rain
heavy rain
heavy rain
rain showers
part cloud
part cloud
clear
clear
part cloud
cloud
cloud
part cloud
clear
clear
part cloud
part cloud
light rain
part cloud
clear
clear
clear
cloud
cloud
clear
clear
clear
clear
part cloud
light rain
part cloud
clear
part cloud
cloud
cloudy
some clouds
cloudy
light rain
light rain
snow shwrs
clear
cloudy
rain shwrs
clear
clear
some clouds
cloudy
cloudy
light rain
heavy rain
heavy rain
rain shwrs
some clouds
some clouds
clear
clear
some clouds
cloudy
cloudy
some clouds
clear
clear
some clouds
some clouds
light rain
some clouds
clear
clear
clear
cloudy
cloudy
clear
clear
clear
clear
some clouds
light rain
some clouds
clear
some clouds
cloudy
 km/h
25
ENE
10
ENE
25
SSW
25
W
25
WNW
25
WNW
15
WSW
20
SSW
25
SW
40
W
35
W
20
WNW
10
NW
15
SE
25
SE
35
S
40
S
30
W
25
W
25
WNW
25
W
25
WNW
10
WNW
15
S
15
SE
15
SE
5
SSW
15
SSW
20
S
25
SW
30
SW
25
WNW
25
WNW
25
NW
15
NNW
15
ESE
20
SSE
10
S
15
SW
15
SSW
25
S
35
SSW
20
WSW
30
W
30
W
25
W
30
W
 mm 
1
1
1
5
15
13
6
1
5
max°C
3
3
16
14
3
0
1
4
6
2
5
2
-1
1
6
13
14
14
-1
3
0
-3
1
1
0
1
1
2
5
5
6
9
6
4
8
5
2
14
13
20
24
17
8
6
1
-1
2
Moonrise
2:38
3:31
4:15
4:52
5:23
5:48
6:11
6:32
6:53
7:15
7:41
8:12
8:52
9:42
10:43
11:55
Moonset
10:55
11:49
12:51
1:58
3:08
4:19
5:30
6:43
7:57
9:14
10:34
11:54
1:11
2:19
3:15
Sunrise
7:03
7:01
6:58
6:56
6:56
6:54
6:52
6:50
6:48
6:47
6:45
6:43
6:41
6:39
6:37
6:35
Sunset
6:44
6:45
6:45
6:46
6:49
6:50
6:51
6:52
6:52
6:53
6:55
6:57
6:58
6:59
7:00
7:00
Today's sea temperature in Merrimack River Entrance is
2.8° C
(Statistics for 11 Mar 1981-2005 – mean: 3.2 max: 4.3 min: 1.4°C)
Issued (local time): 7 am Wednesday 11 Mar 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest