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 06:30 AM and sunset is at 07:05 PM.

Days 1–3 Weather Summary

Heavy rain (total 41mm), heaviest during Thu night. Low air temperatures (max 9°C on Fri afternoon, min 2°C on Fri night). Winds increasing (calm on Thu morning, fresh winds from the WNW by Fri night).

Days 4–6 Weather Summary

Light rain (total 2mm), mostly falling on Tue night. Cool air temperatures (max 11°C on Sun afternoon, min 3°C on Sun morning). Wind will be generally light.

Days 7–9 Weather Summary

Heavy rain (total 43mm), heaviest during Wed afternoon. Later becoming colder with a dusting of snow on Thu morning. Mild temperatures (max 5°C on Wed night, min 1°C on Thu morning). Mainly strong winds.

Days 10–12 Weather Summary

Mostly dry. Very mild (max 17°C on Mon afternoon, min 2°C on Sat morning). Wind will be generally light.

Thursday
28
Friday
29
Saturday
30
Sunday
31
Monday
1
Tuesday
2
Wednesday
3
Thursday
4
Friday
5
Saturday
6
Sunday
7
Monday
8
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
1:56PM2.52m
2:01AM2.72m
2:33PM2.44m
2:39AM2.71m
3:16PM2.36m
3:22AM2.68m
4:04PM2.29m
4:12AM2.65m
5:01PM2.25m
5:11AM2.63m
6:05PM2.26m
6:17AM2.66m
7:12PM2.35m
7:25AM2.73m
8:16PM2.51m
8:32AM2.86m
9:13PM2.72m
9:33AM2.99m
10:06PM2.94m
10:29AM3.10m
10:55PM3.14m
11:22AM3.16m
11:43PM3.27m
Low Tide
7:43AM0.09m
7:50PM0.29m
8:20AM0.11m
8:27PM0.35m
9:02AM0.15m
9:08PM0.42m
9:49AM0.20m
9:57PM0.48m
10:43AM0.23m
10:53PM0.51m
11:45AM0.23m
11:58PM0.50m
12:51PM0.19m
1:07AM0.40m
1:55PM0.08m
2:14AM0.23m
2:55PM-0.05m
3:16AM0.02m
3:49PM-0.19m
4:13AM-0.20m
4:40PM-0.29m
5:06AM-0.38m
5:28PM-0.33m
Wave
height (m) 
direction
period (s) 
1.2
ESE
10
1.2
ESE
10
1.2
ESE
10
1.2
SE
11
1.2
SE
11
1.2
ESE
10
1.1
SE
10
0.8
ESE
10
0.6
ESE
11
0.6
ESE
10
0.5
ESE
10
0.5
ESE
10
0.4
ESE
10
0.5
ESE
10
0.4
ESE
10
0.4
SE
10
0.4
ESE
9
0.5
ESE
9
1.5
ESE
5
2.2
ESE
7
2.4
ESE
9
1.7
ESE
9
1.5
ESE
10
1.1
ESE
10
1.6
NE
6
2
ENE
7
2.1
E
8
1.8
E
8
1.5
E
9
1.2
E
9
1
E
11
0.9
E
11
0.7
E
11
0.6
E
13
0.6
E
12
0.5
E
11
heavy rain
mod rain
heavy rain
cloud
cloud
part cloud
clear
clear
part cloud
cloud
part cloud
part cloud
clear
clear
clear
clear
cloud
light rain
light rain
heavy rain
light snow
light snow
light rain
light rain
light rain
light rain
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
heavy rain
mod rain
heavy rain
cloudy
cloudy
some clouds
clear
clear
some clouds
cloudy
some clouds
some clouds
clear
clear
clear
clear
cloudy
light rain
light rain
heavy rain
light snow
light snow
light rain
light rain
light rain
light rain
cloudy
some clouds
clear
clear
clear
clear
clear
clear
clear
clear
 km/h
5
SE
5
NE
15
NNW
20
NW
30
WNW
30
WNW
30
WNW
25
WNW
10
WNW
10
SSW
15
WNW
10
NNW
5
E
15
SSE
10
NNW
10
E
15
SSE
20
SSE
35
ESE
35
ENE
30
NNW
25
WSW
30
WNW
20
NNW
30
N
35
NNE
30
NNE
25
NNE
15
ENE
10
NNW
5
WSW
10
S
10
WNW
0
SSW
10
SSE
10
WSW
 mm 
11
9
21
2.0
5
16
13
2.0
3
2.0
1.0
1.0
max°C
8
7
7
7
9
6
5
9
6
6
11
8
6
6
6
5
5
5
3
3
5
2
3
3
3
4
3
3
7
6
7
13
13
11
17
17
Moonrise
10:51
11:59
1:07
2:10
3:05
3:50
4:26
4:56
5:21
5:44
6:07
Moonset
7:45
8:12
8:45
9:28
10:24
11:30
12:45
2:05
3:26
4:47
6:08
7:29
Sunrise
6:30
6:28
6:26
6:24
6:22
6:22
6:20
6:18
6:16
6:15
6:13
6:11
Sunset
7:05
7:06
7:07
7:07
7:08
7:09
7:12
7:13
7:14
7:15
7:15
7:16
Today's sea temperature in Gerrish Island, Portsmouth Harbor is 4.7 °C (Statistics for 28 Mar 1981-2005 – mean: 3.7 max: 4.9 min: 2.4°C)
Nearest