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 — and sunset is at 08:07 PM.

Days 1–4 Weather Summary

Heavy rain (total 107mm), heaviest during Wed night. Warm air temperatures (max 25°C on Tue afternoon, min 17°C on Thu afternoon). Winds increasing (light winds from the SSE on Tue night, fresh winds from the NE by Wed night).

Days 5–7 Weather Summary

Mostly dry. Warm air temperatures (max 27°C on Sat afternoon, min 19°C on Sat night). Wind will be generally light.

Days 8–10 Weather Summary

Mostly dry. Warm (max 28°C on Mon afternoon, min 19°C on Tue morning). Wind will be generally light.

Days 11–13 Weather Summary

Mostly dry. Warm (max 28°C on Sat afternoon, min 18°C on Thu night). Wind will be generally light.

Days 14–17 Weather Summary

Mostly dry. Warm (max 25°C on Tue afternoon, min 18°C on Sun night). Wind will be generally light.

Tue
28
Wednesday
29
Thursday
30
Friday
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
Wednesday
12
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
night
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
Wave Height Map
High Tide
Low Tide
Wave
Height (m)
Direction
Period (s)
0.8
SE
4
0.7
ESE
8
0.8
ESE
4
1.1
ESE
5
1.8
ESE
6
1.5
E
6
1.6
ENE
6
1.4
ENE
6
0.8
E
6
0.6
E
6
0.4
ESE
7
0.4
SE
8
0.6
SE
4
0.4
SE
5
0.3
SE
7
0.4
SE
4
0.4
SE
5
0.3
SE
7
0.5
SSE
3
0.4
SE
7
0.8
NE
4
0.5
ENE
4
0.3
E
4
0.2
ESE
8
0.4
SE
4
0.3
ESE
8
0.2
ESE
8
0.4
SE
3
0.4
SE
3
0.3
ESE
8
0.7
SE
4
0.5
SE
4
0.3
E
9
0.4
E
9
0.3
E
9
0.4
E
9
0.4
E
9
0.3
E
8
0.3
E
8
0.4
E
9
0.3
E
8
0.2
E
8
0.4
SSE
3
0.2
E
8
0.2
E
8
0.2
ESE
8
0.3
ESE
7
rain showers
rain showers
cloud
mod rain
heavy rain
heavy rain
mod rain
light rain
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
clear
part cloud
clear
part cloud
clear
part cloud
clear
clear
clear
clear
part cloud
cloud
part cloud
part cloud
part cloud
rain shwrs
rain shwrs
cloudy
mod rain
heavy rain
heavy rain
mod rain
light rain
clear
clear
clear
clear
clear
clear
some clouds
clear
some clouds
some clouds
some clouds
some clouds
clear
clear
clear
clear
some clouds
some clouds
some clouds
clear
clear
some clouds
some clouds
some clouds
clear
some clouds
clear
some clouds
clear
some clouds
clear
clear
clear
clear
some clouds
cloudy
some clouds
some clouds
some clouds
km/h
20
SSE
10
SSE
15
ESE
25
ENE
20
E
25
NE
30
NNE
20
N
10
NE
10
SSE
10
SW
10
S
20
SSE
5
SSW
10
SE
15
SE
10
SW
10
SSW
15
S
10
NNW
20
NE
10
ESE
10
WNW
10
SSE
15
SSE
10
SW
10
S
20
SSE
10
SW
15
S
20
SSE
15
SSW
10
WSW
10
SW
10
N
10
ENE
15
SE
10
NNW
10
NE
15
SE
5
SW
10
SE
20
S
5
SW
5
E
10
E
5
NE
 mm
1
1
9
68
17
10
1
max °C
25
23
20
19
19
18
17
18
21
24
22
26
27
21
22
23
23
27
28
26
20
22
22
24
26
25
25
26
23
23
24
24
27
28
26
20
22
21
20
22
20
23
25
21
21
22
21
Moonrise
7:56
8:24
8:48
9:09
9:29
9:49
10:09
10:33
11:02
11:39
12:27
1:28
2:42
4:02
5:24
Moonset
5:15
6:22
7:29
8:35
9:43
10:51
12:02
1:16
2:33
3:50
5:01
6:01
6:49
7:26
7:55
Sunrise
5:31
5:31
5:33
5:33
5:35
5:35
5:37
5:37
5:39
5:39
5:41
5:41
5:43
5:43
5:45
Sunset
8:07
8:07
8:06
8:05
8:04
8:02
8:01
8:00
7:59
7:58
7:57
7:54
7:53
7:52
7:51
7:50
Today's sea temperature in Merrimack River Entrance is
17.0° C
(Statistics for 28 Jul 1981-2005 – mean: 19.2 max: 21.5 min: 17.2°C)
Issued (local time): 1 pm Tuesday 28 Jul 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest