Gerrish Island, Portsmouth Harbor Sea Conditions and Tide Table

Gerrish Island, Portsmouth Harbor 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 06:46 AM and sunset is at 06:53 PM.

Days 1–3 Weather Summary

A dusting of new snow. Icy conditions (max 9°C on Wed afternoon, min -7°C on Thu night). Winds increasing (light winds from the WSW on Tue night, strong winds from the WNW by Thu afternoon).

Days 4–6 Weather Summary

A dusting of snow. Milder later with heavy rain (total 45mm) on Sat night. Icy conditions (max 9°C on Sat afternoon, min -7°C on Fri morning). Winds increasing (calm on Fri night, strong winds from the SSE by Sat afternoon).

Days 7–9 Weather Summary

Some drizzle, heaviest during Wed morning. Freeze-thaw conditions (max 10°C on Wed night, min -4°C on Mon morning). Wind will be generally light.

Days 10–12 Weather Summary

Light rain (total 6mm) at first, then becoming colder with a dusting of snow on Sat afternoon. Freeze-thaw conditions (max 15°C on Thu afternoon, min -5°C on Sat night). Winds increasing (calm on Fri afternoon, strong winds from the N by Sat night).

Tuesday
19
Wednesday
20
Thursday
21
Friday
22
Saturday
23
Sunday
24
Monday
25
Tuesday
26
Wednesday
27
Thursday
28
Friday
29
Saturday
30
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
7:38AM2.54m
8:30PM2.29m
8:42AM2.55m
9:25PM2.35m
9:36AM2.60m
10:12PM2.44m
10:23AM2.65m
10:52PM2.52m
11:04AM2.69m
11:27PM2.59m
11:41AM2.70m
11:58PM2.65m
12:15PM2.68m
00:28AM2.69m
12:48PM2.65m
00:57AM2.72m
1:21PM2.59m
1:28AM2.73m
1:56PM2.52m
2:01AM2.72m
2:33PM2.44m
2:39AM2.71m
3:16PM2.36m
3:22AM2.68m
Low Tide
2:10PM0.26m
2:23AM0.51m
3:08PM0.23m
3:20AM0.43m
3:57PM0.20m
4:08AM0.34m
4:39PM0.16m
4:51AM0.24m
5:15PM0.15m
5:28AM0.17m
5:48PM0.15m
6:03AM0.12m
6:18PM0.16m
6:36AM0.09m
6:47PM0.20m
7:09AM0.08m
7:17PM0.24m
7:43AM0.09m
7:50PM0.29m
8:20AM0.11m
8:27PM0.35m
9:02AM0.15m
9:08PM0.42m
Wave
height (m) 
direction
period (s) 
0.6
WNW
3
0.4
ESE
8
0.3
ESE
8
0.4
ESE
9
0.4
SE
8
0.8
WSW
3
0.9
W
4
0.9
WNW
4
0.9
WNW
4
0.4
WNW
3
0.2
ESE
10
0.5
S
4
1.1
SE
5
2.5
SE
7
1.8
SE
9
1.3
SE
10
1.2
SE
11
1.1
SE
11
1.5
SE
10
1.4
SE
10
1.7
ESE
10
1.9
ESE
10
1.8
ESE
10
1.6
ESE
10
1.3
ESE
9
1.2
ESE
9
1
ESE
9
0.9
SE
9
0.9
SE
9
0.8
ESE
9
0.7
ESE
9
0.7
ESE
9
0.8
ESE
9
0.9
SE
6
1.6
NNE
5
1.6
NE
8
clear
cloud
cloud
part cloud
part cloud
snow showers
clear
part cloud
clear
clear
clear
part cloud
light snow
heavy rain
rain showers
clear
clear
clear
part cloud
part cloud
clear
part cloud
part cloud
cloud
light rain
cloud
cloud
cloud
cloud
clear
clear
clear
rain showers
light rain
light snow
part cloud
clear
cloudy
cloudy
some clouds
some clouds
snow shwrs
clear
some clouds
clear
clear
clear
some clouds
light snow
heavy rain
rain shwrs
clear
clear
clear
some clouds
some clouds
clear
some clouds
some clouds
cloudy
light rain
cloudy
cloudy
cloudy
cloudy
clear
clear
clear
rain shwrs
light rain
light snow
some clouds
 km/h
25
WNW
20
WNW
15
SW
15
SW
15
WSW
35
W
40
W
35
WNW
35
WNW
25
WNW
10
WNW
15
SSW
30
SE
45
SSE
35
WNW
25
NW
20
NW
15
NNE
25
NE
20
ENE
15
NE
15
ENE
10
E
10
E
5
NE
5
SSE
10
SW
15
WSW
15
WNW
20
WNW
10
NW
15
SSE
15
S
10
SSW
45
N
30
NNW
 mm 
4
14
27
1.0
5
1.0
max°C
3
6
3
6
9
5
-1
1
-2
-3
5
4
3
9
8
-2
1
-2
-3
-2
-1
0
0
2
2
5
10
13
15
11
6
9
6
7
2
0
Moonrise
1:15
2:21
3:26
4:30
5:32
6:34
7:36
8:39
9:43
10:51
11:59
Moonset
4:32
5:06
5:32
5:54
6:13
6:31
6:48
7:05
7:24
7:45
8:12
8:45
Sunrise
6:46
6:45
6:43
6:41
6:39
6:37
6:35
6:33
6:31
6:30
6:28
6:26
Sunset
6:53
6:54
6:55
6:58
6:59
7:00
7:00
7:01
7:02
7:05
7:06
7:07
Today's sea temperature in Gerrish Island, Portsmouth Harbor is 5.1 °C (Statistics for 19 Mar 1981-2005 – mean: 3.2 max: 4.5 min: 1.9°C)
Nearest