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 08:22 PM.

Days 1–4 Weather Summary

Moderate rain (total 11mm), heaviest on Tue night. Very warm air temperatures (max 32°C on Thu afternoon, min 14°C on Mon night). Wind will be generally light.

Days 5–7 Weather Summary

Light rain (total 9mm), mostly falling on Sat night. Warm air temperatures (max 28°C on Sat afternoon, min 18°C on Fri night). Winds decreasing (fresh winds from the WSW on Fri afternoon, calm by Sun morning).

Days 8–10 Weather Summary

Mostly dry. Warm (max 35°C on Wed afternoon, min 19°C on Sun night). Wind will be generally light.

Days 11–13 Weather Summary

Moderate rain (total 12mm), heaviest on Sat night. Warm (max 34°C on Sat afternoon, min 16°C on Fri night). Wind will be generally light.

Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Wednesday
25
Thursday
26
Friday
27
Sat
28
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) 
0.6
ESE
7.0
0.5
E
6.0
0.5
ESE
6.0
0.5
ESE
6.0
0.6
ESE
7.0
0.6
ESE
7.0
0.5
ESE
7.0
0.5
ESE
7.0
0.5
ESE
7.0
0.6
ESE
7.0
0.7
ESE
8.0
0.9
WSW
4.0
0.7
W
4.0
0.5
E
8.0
0.3
ESE
8.0
0.3
ESE
8.0
0.3
ESE
8.0
0.3
ESE
9.0
0.3
ESE
8.0
0.4
ESE
8.0
0.6
ESE
5.0
0.6
E
9.0
0.4
ESE
9.0
0.4
ESE
9.0
0.4
ESE
9.0
0.4
ESE
8.0
0.4
ESE
8.0
0.4
ESE
8.0
0.6
NE
4.0
0.5
ENE
4.0
0.3
ENE
4.0
0.3
ESE
9.0
0.3
ESE
12.0
0.3
ESE
12.0
0.4
ESE
4.0
0.5
SE
4.0
part cloud
cloud
cloud
mod rain
light rain
rain showers
rain showers
part cloud
clear
thunderstorm
part cloud
clear
part cloud
clear
clear
mod rain
rain showers
part cloud
clear
part cloud
part cloud
clear
clear
part cloud
clear
clear
clear
thunderstorm
rain showers
clear
part cloud
clear
part cloud
part cloud
clear
clear
some clouds
cloudy
cloudy
mod rain
light rain
rain shwrs
rain shwrs
some clouds
clear
risk tstorm
some clouds
clear
some clouds
clear
clear
mod rain
rain shwrs
some clouds
clear
some clouds
some clouds
clear
clear
some clouds
clear
clear
clear
risk tstorm
rain shwrs
clear
some clouds
clear
some clouds
some clouds
clear
clear
 km/h
5
SW
10
SSE
10
SE
10
S
10
SSW
10
WSW
10
SSW
10
SW
15
SSE
15
SSW
30
WSW
35
WSW
30
W
25
WNW
15
WNW
15
WSW
10
NE
10
E
5
WSW
15
SSE
15
SSE
15
SW
5
NNE
15
SSE
10
WNW
15
WNW
5
SSE
15
NNE
20
ENE
10
ESE
10
NE
10
ENE
15
ESE
10
S
15
SW
20
WSW
 mm 
7
1
2
1
1
7
1
5
3
max°C
15
15
17
17
20
24
24
27
32
27
23
21
20
23
28
25
19
21
20
25
27
28
32
32
30
33
35
32
21
22
21
18
18
19
29
34
Moonrise
12:13
12:35
12:55
1:17
1:42
2:12
2:51
3:40
4:43
5:55
7:12
8:27
Moonset
10:10
11:22
12:35
1:48
3:05
4:24
5:47
7:07
8:19
9:18
10:03
10:37
11:04
Sunrise
5:03
5:03
5:03
5:03
5:03
5:03
5:05
5:05
5:05
5:05
5:05
5:05
Sunset
8:22
8:23
8:23
8:23
8:23
8:24
8:24
8:24
8:24
8:24
8:24
8:24
8:24
Today's sea temperature in Merrimack River Entrance is 15.0 °C (Statistics for 16 Jun 1981-2005 – mean: 14.4 max: 16.4 min: 12.5°C)
Issued (local time): 7 pm Monday 16 Jun 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest