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 05:24 AM and sunset is at 07:52 PM.

Days 1–3 Weather Summary

Light rain (total 3mm), mostly falling on Sun afternoon. Cool air temperatures (max 18°C on Sun afternoon, min 7°C on Mon night). Wind will be generally light.

Days 4–6 Weather Summary

Moderate rain (total 14mm), heaviest on Wed night. Cool air temperatures (max 16°C on Wed afternoon, min 9°C on Wed morning). Winds decreasing (fresh winds from the S on Wed afternoon, calm by Thu night).

Days 7–9 Weather Summary

Heavy rain (total 21mm), heaviest during Sun night. Warm (max 22°C on Mon afternoon, min 11°C on Sat night). Wind will be generally light.

Days 10–12 Weather Summary

Mostly dry. Warm (max 30°C on Thu afternoon, min 14°C on Tue morning). Wind will be generally light.

Days 13–16 Weather Summary

Light rain (total 2mm), mostly falling on Fri morning. Warm (max 27°C on Fri morning, min 11°C on Sat night). Wind will be generally light.

Sunday
10
Monday
11
Tuesday
12
Wednesday
13
Thursday
14
Friday
15
Saturday
16
Sunday
17
Monday
18
Tuesday
19
Wednesday
20
Thursday
21
Friday
22
Saturday
23
Sunday
24
Mon
25
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
AM
PM
Wave Height Map
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High Tide
5:39AM2.50m
6:25PM2.39m
6:37AM2.51m
7:16PM2.51m
7:34AM2.55m
8:06PM2.68m
8:31AM2.62m
8:55PM2.86m
9:25AM2.71m
9:43PM3.05m
10:18AM2.79m
10:32PM3.21m
11:11AM2.84m
11:21PM3.32m
12:03PM2.87m
00:11AM3.37m
12:57PM2.85m
1:04AM3.35m
1:53PM2.81m
2:00AM3.27m
2:50PM2.76m
2:58AM3.15m
3:51PM2.71m
4:01AM3.00m
4:53PM2.68m
5:06AM2.85m
5:56PM2.67m
6:13AM2.73m
6:57PM2.69m
Low Tide
12:02PM0.35m
00:25AM0.53m
12:55PM0.31m
1:23AM0.41m
1:46PM0.25m
2:19AM0.24m
2:37PM0.16m
3:13AM0.04m
3:26PM0.08m
4:05AM-0.15m
4:15PM0.01m
4:56AM-0.31m
5:05PM-0.03m
5:48AM-0.41m
5:55PM-0.04m
6:40AM-0.45m
6:48PM-0.02m
7:35AM-0.42m
7:43PM0.05m
8:30AM-0.34m
8:42PM0.13m
9:29AM-0.23m
9:44PM0.21m
10:29AM-0.10m
10:50PM0.27m
11:31AM0.02m
11:58PM0.30m
12:32PM0.12m
Wave
Height (m)
Direction
Period (s)
0.7
SE
6
0.9
ESE
8
0.8
ESE
8
0.9
SE
8
0.8
ESE
8
0.9
ESE
8
0.8
ESE
8
0.7
ESE
8
0.6
ESE
7
0.5
ESE
7
1.3
SSE
5
1
SE
6
1.3
SE
6
1.1
SE
6
0.9
ESE
6
0.8
ESE
6
1.1
ESE
8
1.1
ESE
9
0.9
ESE
8
0.9
ESE
8
0.7
ESE
9
0.6
ESE
9
0.6
ESE
8
0.7
ESE
8
0.5
ESE
8
0.8
ESE
8
0.6
ESE
8
0.5
SE
8
0.5
SE
8
0.4
ESE
8
0.4
SE
8
0.6
ESE
8
0.6
ESE
8
0.5
SE
9
0.7
SE
5
0.7
SSE
6
0.6
SSE
6
0.7
NE
3
0.5
E
4
0.4
SE
9
0.6
SE
3
0.4
SE
9
0.2
ESE
9
0.6
SSE
3
0.3
ESE
17
0.2
ESE
17
0.3
ESE
16
part cloud
rain showers
light rain
part cloud
part cloud
clear
clear
part cloud
part cloud
cloud
cloud
light rain
mod rain
rain showers
rain showers
light rain
part cloud
part cloud
cloud
cloud
clear
part cloud
cloud
rain showers
part cloud
cloud
rain showers
clear
clear
clear
clear
part cloud
part cloud
clear
part cloud
part cloud
rain showers
rain showers
part cloud
clear
clear
clear
clear
clear
clear
part cloud
part cloud
some clouds
rain shwrs
light rain
some clouds
some clouds
clear
clear
some clouds
some clouds
cloudy
cloudy
light rain
mod rain
rain shwrs
rain shwrs
light rain
some clouds
some clouds
cloudy
cloudy
clear
some clouds
cloudy
rain shwrs
some clouds
cloudy
rain shwrs
clear
clear
clear
clear
some clouds
some clouds
clear
some clouds
some clouds
rain shwrs
rain shwrs
some clouds
clear
clear
clear
clear
clear
clear
some clouds
some clouds
km/h
10
S
10
WSW
15
W
10
WNW
10
WNW
10
NW
10
NW
15
WNW
5
N
15
S
30
S
20
S
20
S
20
SE
5
NNE
10
NNW
10
SW
15
WSW
10
SSW
10
W
10
NE
10
SE
15
ESE
10
SSW
10
S
20
SSW
20
W
5
NW
10
SSE
10
WNW
5
SSE
20
SSE
10
SW
20
SSW
20
SSW
20
SW
20
W
25
ENE
10
N
10
SE
15
SSE
10
NW
5
WSW
20
SSE
10
N
10
E
15
SE
2
1
5
6
1
1
1
11
10
1
1
max °C
16
18
17
13
16
14
12
15
15
13
16
12
12
15
12
10
16
16
13
16
16
11
12
15
21
22
18
17
17
16
19
20
19
25
30
25
27
24
16
15
16
14
15
17
17
15
14
Moonrise
2:13
2:35
2:55
3:16
3:38
4:05
4:38
5:21
6:16
7:25
8:42
10:01
11:18
12:30
1:39
2:45
Moonset
12:49
1:58
3:08
4:22
5:39
7:01
8:25
9:46
10:56
11:51
12:33
1:05
1:31
1:52
2:12
Sunrise
5:24
5:24
5:22
5:22
5:20
5:18
5:18
5:16
5:16
5:15
5:13
5:13
5:13
5:11
5:11
5:09
Sunset
7:52
7:53
7:54
7:55
7:57
7:59
8:00
8:00
8:01
8:02
8:04
8:05
8:06
8:07
8:07
8:08
Today's sea temperature in Gerrish Island, Portsmouth Harbor is
8.2° C
(Statistics for 10 May 1981-2005 – mean: 8.0 max: 9.8 min: 5.9°C)
Issued (local time): 7 am Sunday 10 May 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest