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 07:01 AM and sunset is at 04:09 PM.

Days 1–3 Weather Summary

Mostly dry. Icy conditions (max 2°C on Sun morning, min -8°C on Mon night). Wind will be generally light.

Days 4–6 Weather Summary

Light rain (total 4mm), mostly falling on Wed night. Icy conditions (max 7°C on Wed afternoon, min -2°C on Thu afternoon). Wind will be generally light.

Days 7–9 Weather Summary

Mostly dry. Temperatures will be below freezing (max -1°C on Sat morning, min -7°C on Sat night). Wind will be generally light.

Days 10–12 Weather Summary

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

Sunday
7
Monday
8
Tuesday
9
Wednesday
10
Thursday
11
Friday
12
Saturday
13
Sunday
14
Monday
15
Tuesday
16
Wednesday
17
Thu
18
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
2:35PM2.10m
3:03AM1.57m
3:26PM2.03m
3:54AM1.55m
4:17PM1.94m
4:46AM1.54m
5:09PM1.83m
5:38AM1.54m
6:01PM1.72m
6:31AM1.54m
6:53PM1.61m
7:24AM1.55m
7:45PM1.51m
8:15AM1.58m
8:37PM1.44m
9:06AM1.60m
9:29PM1.38m
9:56AM1.63m
10:20PM1.35m
10:45AM1.67m
11:09PM1.35m
11:32AM1.71m
Low Tide
9:12AM0.02m
10:04PM-0.17m
10:06AM0.03m
10:55PM-0.12m
11:01AM0.06m
11:47PM-0.07m
11:58AM0.10m
00:40AM-0.02m
12:57PM0.13m
1:33AM0.02m
1:57PM0.15m
2:26AM0.07m
2:56PM0.15m
3:18AM0.10m
3:52PM0.13m
4:08AM0.13m
4:46PM0.10m
4:57AM0.15m
5:37PM0.08m
5:44AM0.17m
6:25PM0.06m
6:30AM0.20m
Wave
height (m) 
direction
period (s) 
part cloud
cloud
clear
clear
clear
clear
part cloud
cloud
rain showers
cloud
light rain
rain showers
clear
part cloud
cloud
part cloud
part cloud
clear
part cloud
clear
clear
clear
clear
part cloud
part cloud
cloud
cloud
cloud
cloud
part cloud
clear
clear
clear
part cloud
cloud
some clouds
cloudy
clear
clear
clear
clear
some clouds
cloudy
rain shwrs
cloudy
light rain
rain shwrs
clear
some clouds
cloudy
some clouds
some clouds
clear
some clouds
clear
clear
clear
clear
some clouds
some clouds
cloudy
cloudy
cloudy
cloudy
some clouds
clear
clear
clear
some clouds
cloudy
 km/h
10
WNW
5
SSE
20
W
20
NNW
15
NW
5
WNW
10
SW
10
SSW
20
SW
15
SSW
20
SW
20
WSW
15
WNW
10
WNW
5
SW
10
WNW
10
NNW
15
NW
10
NW
5
NNW
10
NW
15
NW
15
NW
10
W
10
W
5
NW
10
NNE
20
NNE
20
NNE
20
N
15
NW
15
NW
10
NW
5
SSW
10
S
 mm 
1
1
2
max°C
2
2
0
-6
-6
-8
-2
-1
2
6
7
5
1
0
-2
2
0
-4
-1
-2
-4
-3
-3
-5
-2
-1
-3
-3
-4
-4
1
0
-1
2
1
Moonrise
7:05
8:23
9:37
10:46
11:52
12:56
1:59
3:02
4:06
5:10
6:13
Moonset
10:02
10:39
11:08
11:32
11:52
12:11
12:29
12:48
1:09
1:35
2:05
2:44
Sunrise
7:01
7:01
7:01
7:03
7:03
7:05
7:05
7:07
7:07
7:07
7:09
7:09
Sunset
4:09
4:09
4:09
4:09
4:09
4:09
4:09
4:09
4:10
4:10
4:10
4:12
Today's sea temperature in Riverside, Merrimack River is
8.0° C
(Statistics for 07 Dec 1981-2005 – mean: 8.3 max: 10.2 min: 6.9°C)
Issued (local time): 12 am Sunday 07 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest