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 07:11 AM and sunset is at 04:13 PM.

Days 1–3 Weather Summary

A light covering of new snow, mostly falling on Tue night. Icy conditions (max 2°C on Tue morning, min -12°C on Thu night). Winds increasing (calm on Tue morning, fresh winds from the NNW by Thu afternoon).

Days 4–6 Weather Summary

A dusting of snow turning to light rain (total 8mm) on Sun night. Icy conditions (max 5°C on Sun night, min -11°C on Fri morning). Winds increasing (calm on Sat afternoon, fresh winds from the WNW by Sun night).

Days 7–9 Weather Summary

Mostly dry. Temperatures will be below freezing (max -2°C on Tue afternoon, min -8°C on Mon night). Winds decreasing (fresh winds from the W on Mon night, light winds from the WNW by Wed night).

Days 10–12 Weather Summary

Mostly dry. Freeze-thaw conditions (max 6°C on Sun morning, min -4°C on Thu morning). Wind will be generally light.

Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thursday
1
Friday
2
Saturday
3
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
Wave Height Map
High Tide
Low Tide
Wave
height (m) 
direction
period (s) 
0.2
E
10
0.3
E
10
0.5
SE
5
0.9
N
4
2
ENE
8
1.6
E
9
1.3
E
9
1.1
E
9
1.4
E
10
1.1
NE
7
0.9
E
10
0.9
ENE
5
1.1
E
12
0.9
E
12
0.8
E
12
0.6
E
12
0.5
E
12
0.9
SE
7
1
NW
4
0.8
W
4
0.8
W
4
0.8
W
4
0.9
WNW
4
0.8
WNW
4
0.6
NW
3
0.4
NW
3
0.2
E
10
0.3
E
12
0.6
SW
3
0.5
W
3
0.4
W
3
0.2
E
10
0.4
NE
4
0.3
E
10
0.4
SE
4
0.7
S
4
cloud
light snow
light snow
snow showers
cloud
cloud
cloud
clear
clear
clear
part cloud
cloud
part cloud
clear
clear
part cloud
light snow
rain showers
part cloud
part cloud
part cloud
cloud
clear
clear
clear
part cloud
clear
part cloud
cloud
cloud
cloud
clear
part cloud
clear
part cloud
part cloud
cloudy
light snow
light snow
snow shwrs
cloudy
cloudy
cloudy
clear
clear
clear
some clouds
cloudy
some clouds
clear
clear
some clouds
light snow
rain shwrs
some clouds
some clouds
some clouds
cloudy
clear
clear
clear
some clouds
clear
some clouds
cloudy
cloudy
cloudy
clear
some clouds
clear
some clouds
some clouds
 km/h
5
SSE
10
S
10
WSW
30
NNW
25
NNE
10
WSW
20
WSW
30
NW
30
NW
15
NW
10
N
15
N
15
N
5
NW
10
W
5
WSW
10
SSW
15
SW
35
WNW
35
W
30
W
30
W
35
W
25
WNW
25
NW
20
WNW
10
WNW
15
WSW
25
WSW
25
W
15
W
10
NE
5
N
10
SSW
15
SSW
20
SSW
 mm 
8
max°C
2
1
2
1
0
-1
1
2
-7
-7
-6
-7
-6
-5
-5
-1
0
5
-3
-4
-5
-3
-2
-4
-3
-3
-6
0
0
1
3
2
1
3
5
5
Moonrise
9:51
10:16
10:38
10:58
11:18
11:40
12:05
12:36
1:16
2:09
3:16
4:33
Moonset
7:43
8:52
10:00
11:10
12:21
1:36
2:55
4:17
5:37
6:48
7:46
Sunrise
7:11
7:11
7:11
7:11
7:11
7:13
7:13
7:13
7:13
7:13
7:13
7:13
Sunset
4:13
4:13
4:14
4:15
4:15
4:15
4:16
4:17
4:17
4:19
4:20
4:21
Today's sea temperature in Merrimack River Entrance is
6.9° C
(Statistics for 23 Dec 1981-2005 – mean: 6.5 max: 8.1 min: 5.2°C)
Issued (local time): 12 pm Tuesday 23 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest