Riverside, Merrimack River Sea Conditions and Tide Table

Riverside, Merrimack River 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 07:09 AM and sunset is at 04:12 PM.

Days 1–3 Weather Summary

Moderate rain (total 15mm), heaviest on Fri morning. Icy conditions (max 15°C on Fri morning, min -3°C on Fri night). Winds decreasing (fresh winds from the S on Fri morning, calm by Sat afternoon).

Days 4–6 Weather Summary

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

Days 7–9 Weather Summary

Moderate rain (total 11mm), heaviest on Thu night. Freeze-thaw conditions (max 12°C on Fri morning, min -8°C on Wed night). Wind will be generally light.

Days 10–12 Weather Summary

A dusting of new snow. Freeze-thaw conditions (max 6°C on Mon morning, min -4°C on Mon night). Wind will be generally light.

Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
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
11:32AM1.71m
11:57PM1.36m
12:18PM1.75m
00:43AM1.38m
1:03PM1.79m
1:28AM1.41m
1:48PM1.82m
2:13AM1.44m
2:33PM1.84m
2:59AM1.47m
3:18PM1.85m
3:46AM1.50m
4:06PM1.84m
4:35AM1.55m
4:55PM1.82m
5:25AM1.60m
5:45PM1.77m
6:15AM1.66m
6:38PM1.72m
7:08AM1.73m
7:31PM1.65m
8:01AM1.80m
8:26PM1.58m
Low Tide
7:12PM0.05m
7:14AM0.21m
7:57PM0.05m
7:57AM0.23m
8:41PM0.05m
8:38AM0.24m
9:23PM0.05m
9:19AM0.24m
10:05PM0.06m
9:58AM0.25m
10:47PM0.07m
10:39AM0.25m
11:29PM0.08m
11:25AM0.24m
00:12AM0.09m
12:19PM0.23m
00:59AM0.10m
1:21PM0.20m
1:49AM0.11m
2:24PM0.15m
2:42AM0.12m
3:26PM0.09m
3:35AM0.11m
Wave
height (m) 
direction
period (s) 
clear
clear
part cloud
mod rain
rain showers
clear
clear
part cloud
cloud
clear
clear
clear
clear
clear
part cloud
cloud
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
heavy rain
part cloud
part cloud
part cloud
cloud
cloud
part cloud
cloud
cloud
snow showers
part cloud
part cloud
clear
clear
clear
some clouds
mod rain
rain shwrs
clear
clear
some clouds
cloudy
clear
clear
clear
clear
clear
some clouds
cloudy
some clouds
clear
clear
clear
some clouds
some clouds
some clouds
heavy rain
some clouds
some clouds
some clouds
cloudy
cloudy
some clouds
cloudy
cloudy
snow shwrs
some clouds
some clouds
clear
 km/h
10
S
10
SSW
5
SSE
30
SSE
15
W
30
W
20
WNW
5
SW
20
SSW
20
WSW
20
WNW
20
WNW
25
NW
20
NW
10
WSW
15
SSW
20
WSW
20
WNW
25
NW
20
NW
5
WNW
10
SW
10
SW
10
SSW
25
SW
25
W
15
NW
10
NNW
5
E
5
WNW
0
SSE
5
SE
5
SSE
5
WNW
10
NW
15
NW
 mm 
10
5
11
max°C
4
4
13
15
8
0
2
2
4
4
1
-1
-5
-5
-4
0
0
3
-5
-6
-7
0
1
6
12
11
5
3
2
2
3
3
2
6
5
-1
Moonrise
6:13
7:11
8:03
8:47
9:23
9:52
10:17
10:39
10:59
11:19
11:41
12:06
Moonset
2:44
3:30
4:26
5:29
6:36
7:44
8:53
10:01
11:11
12:23
1:37
Sunrise
7:09
7:09
7:09
7:11
7:11
7:11
7:11
7:13
7:13
7:13
7:13
7:13
Sunset
4:12
4:12
4:12
4:13
4:13
4:14
4:15
4:15
4:15
4:16
4:16
4:17
Today's sea temperature in Riverside, Merrimack River is
6.7° C
(Statistics for 18 Dec 1981-2005 – mean: 7.2 max: 9.4 min: 5.5°C)
Issued (local time): 12 pm Thursday 18 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest