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 — and sunset is at 05:32 PM.

Days 1–4 Weather Summary

A light covering of new snow, mostly falling on Tue night. Icy conditions (max 8°C on Wed afternoon, min -6°C on Mon night). Wind will be generally light.

Days 5–7 Weather Summary

A light covering of new snow on Thu night turning to drizzle on Sat night. Icy conditions (max 9°C on Sat night, min -3°C on Fri morning). Winds decreasing (fresh winds from the NE on Thu night, light winds from the NW by Sun morning).

Days 8–10 Weather Summary

Light rain (total 4mm), mostly falling on Mon afternoon. Freeze-thaw conditions (max 16°C on Wed morning, min -2°C on Mon night). Winds increasing (calm on Sun afternoon, fresh winds from the W by Mon afternoon).

Days 11–13 Weather Summary

Drizzle on Thu afternoon followed by colder weather and a moderate fall of snow, heaviest on Fri afternoon. Freeze-thaw conditions (max 17°C on Thu morning, min -4°C on Fri morning). Winds decreasing (strong winds from the SSW on Thu morning, light winds from the SW by Sat morning).

Mon
2
Tuesday
3
Wednesday
4
Thursday
5
Friday
6
Saturday
7
Sunday
8
Monday
9
Tuesday
10
Wednesday
11
Thursday
12
Friday
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
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
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
Wave Height Map
High Tide
10:36PM2.81m
10:51AM3.02m
11:18PM2.87m
11:35AM2.98m
11:58PM2.88m
12:18PM2.88m
00:36AM2.86m
12:59PM2.76m
1:14AM2.80m
1:40PM2.61m
1:52AM2.71m
2:23PM2.45m
3:33AM2.61m
3:10PM2.30m
3:18AM2.51m
4:02PM2.17m
4:10AM2.43m
5:01PM2.09m
5:09AM2.38m
6:04PM2.07m
6:12AM2.38m
7:05PM2.12m
7:12AM2.45m
7:58PM2.23m
8:05AM2.55m
8:44PM2.37m
8:52AM2.68m
Low Tide
4:21PM-0.22m
4:35AM-0.11m
5:04PM-0.22m
5:21AM-0.15m
5:45PM-0.17m
6:05AM-0.14m
6:24PM-0.07m
6:46AM-0.09m
7:01PM0.05m
7:28AM-0.00m
7:39PM0.19m
8:11AM0.11m
8:19PM0.34m
8:57AM0.23m
9:03PM0.48m
9:47AM0.34m
9:52PM0.59m
10:44AM0.43m
10:49PM0.66m
11:46AM0.46m
11:51PM0.68m
12:48PM0.44m
00:53AM0.62m
1:42PM0.35m
1:48AM0.50m
2:29PM0.24m
2:37AM0.35m
3:10PM0.12m
Wave
height (m) 
direction
period (s) 
0.5
ESE
8
0.5
ESE
8
0.5
ESE
8
0.6
ESE
8
0.7
SE
5
0.7
SE
8
0.7
SE
8
0.6
SE
8
0.6
SE
8
0.5
SE
8
0.9
ENE
4
2.2
ENE
7
2
E
8
1.6
ESE
8
1.5
ESE
9
1.4
ESE
9
1.3
ESE
9
0.9
ESE
9
0.7
ESE
9
0.6
ESE
9
0.7
ESE
8
0.8
ESE
8
0.9
ESE
8
0.6
SE
8
0.3
SE
9
1.3
SSE
5
1.3
SSE
6
1.3
SSE
7
1.2
SSE
7
1.6
SSE
7
1.5
SSE
8
0.6
SSE
8
1
NE
5
1.4
ENE
6
1.6
E
7
1.8
ESE
8
1.5
ESE
8
1
ESE
8
0.7
ESE
8
0.9
ESE
7
0.9
E
4
1.6
ESE
6
1.6
E
8
1.3
E
8
1
ESE
8
0.7
ESE
8
0.6
ESE
8
part cloud
clear
part cloud
light snow
snow showers
clear
clear
part cloud
cloud
cloud
light snow
light snow
cloud
cloud
cloud
cloud
light rain
part cloud
part cloud
part cloud
clear
light rain
clear
clear
clear
part cloud
cloud
part cloud
cloud
part cloud
light rain
part cloud
cloud
light snow
mod snow
cloud
cloud
part cloud
cloud
cloud
light snow
light snow
light snow
light rain
cloud
part cloud
part cloud
some clouds
clear
some clouds
light snow
snow shwrs
clear
clear
some clouds
cloudy
cloudy
light snow
light snow
cloudy
cloudy
cloudy
cloudy
light rain
some clouds
some clouds
some clouds
clear
light rain
clear
clear
clear
some clouds
cloudy
some clouds
cloudy
some clouds
light rain
some clouds
cloudy
light snow
mod snow
cloudy
cloudy
some clouds
cloudy
cloudy
light snow
light snow
light snow
light rain
cloudy
some clouds
some clouds
 km/h
5
SW
10
SW
20
SSW
15
SSW
10
NW
10
NW
10
WNW
0
WNW
5
NNE
10
NNE
25
NE
35
NE
25
ENE
15
ESE
15
S
20
SSW
25
SW
15
WNW
5
SE
10
SSW
20
SW
20
SW
30
WNW
20
WNW
5
W
30
S
30
SSW
25
SW
30
SSW
40
SSW
35
WNW
10
NW
20
ENE
25
ENE
25
ENE
10
N
15
SSW
15
W
10
NNE
15
NE
20
ENE
25
E
10
ENE
10
SW
20
WNW
15
WNW
15
NNE
 mm 
1
4
1
4
max°C
-3
-4
-1
0
2
6
8
6
1
1
2
-3
-2
0
1
4
9
8
8
7
14
14
7
3
5
6
16
16
16
17
14
4
-3
-3
-1
0
5
9
1
1
1
1
1
12
5
5
3
Moonrise
4:51
6:02
7:10
8:17
9:24
10:30
12:36
1:40
2:39
3:31
4:16
4:53
5:23
5:48
6:11
Moonset
6:17
6:36
6:55
7:15
7:36
9:01
9:31
10:08
10:54
11:48
12:49
1:57
3:06
4:18
5:30
Sunrise
6:15
6:13
6:11
6:09
6:07
7:05
6:05
6:03
6:01
6:00
5:58
5:56
5:54
5:52
5:50
Sunset
5:32
5:34
5:35
5:37
5:37
5:38
6:39
5:40
5:43
5:44
5:45
5:45
5:47
5:49
5:50
5:51
Today's sea temperature in Gerrish Island, Portsmouth Harbor is
3.1° C
(Statistics for 02 Mar 1981-2005 – mean: 3.1 max: 4.2 min: 1.7°C)
Issued (local time): 6 pm Monday 02 Mar 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest