Seavey Island, Portsmouth Harbor Sea Conditions and Tide Table

Seavey 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 08:21 PM.

Days 1–4 Weather Summary

Light rain (total 3mm), mostly falling on Mon night. Very warm air temperatures (max 30°C on Tue afternoon, min 19°C on Sun night). Wind will be generally light.

Days 5–7 Weather Summary

Light rain (total 4mm), mostly falling on Thu night. Very warm air temperatures (max 33°C on Fri afternoon, min 18°C on Fri night). Wind will be generally light.

Days 8–10 Weather Summary

Moderate rain (total 10mm), heaviest on Sun afternoon. Warm (max 26°C on Sun morning, min 18°C on Sat night). Wind will be generally light.

Days 11–13 Weather Summary

Light rain (total 3mm), mostly falling on Thu night. Warm (max 34°C on Thu afternoon, min 17°C on Tue night). Wind will be generally light.

Sun
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
Wednesday
23
Thursday
24
Fri
25
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
Wave Height Map
High Tide
2:02PM2.42m
2:08AM2.78m
2:43PM2.50m
2:53AM2.75m
3:27PM2.56m
3:42AM2.69m
4:17PM2.62m
4:38AM2.59m
5:11PM2.67m
5:39AM2.49m
6:09PM2.71m
6:43AM2.40m
7:09PM2.76m
7:51AM2.36m
8:12PM2.81m
8:58AM2.35m
9:14PM2.87m
10:00AM2.39m
10:11PM2.93m
10:56AM2.44m
11:06PM2.96m
11:49AM2.48m
11:58PM2.96m
Low Tide
7:54PM0.27m
8:30AM-0.03m
8:40PM0.22m
9:14AM-0.02m
9:32PM0.18m
10:01AM0.02m
10:28PM0.15m
10:53AM0.08m
11:28PM0.12m
11:47AM0.15m
00:29AM0.10m
12:43PM0.22m
1:34AM0.06m
1:44PM0.27m
2:41AM0.01m
2:48PM0.28m
3:44AM-0.06m
3:49PM0.25m
4:41AM-0.12m
4:45PM0.20m
5:34AM-0.16m
5:37PM0.17m
6:22AM-0.16m
Wave
height (m) 
direction
period (s) 
0.8
SE
4.0
0.7
SE
5.0
0.5
SE
4.0
0.7
SE
4.0
0.5
SE
5.0
0.4
SE
6.0
0.7
SE
4.0
0.5
SE
6.0
0.4
SE
6.0
0.7
SSE
3.0
0.5
SE
4.0
0.4
ESE
17.0
0.4
SSE
4.0
0.5
SE
4.0
0.4
SE
16.0
0.3
ESE
16.0
0.5
NE
4.0
0.4
ESE
9.0
0.4
ESE
10.0
0.4
ESE
10.0
0.4
ESE
9.0
0.5
SE
3.0
0.5
SE
5.0
0.4
SE
7.0
0.4
SE
8.0
0.4
SE
7.0
0.4
SE
7.0
0.4
SE
8.0
0.4
SE
8.0
0.4
SE
8.0
0.5
SE
3.0
0.6
SE
4.0
0.5
SE
6.0
0.6
SE
4.0
0.6
SE
6.0
0.4
ESE
7.0
clear
clear
part cloud
light rain
light rain
clear
clear
clear
clear
clear
part cloud
part cloud
thunderstorm
thunderstorm
clear
part cloud
part cloud
clear
part cloud
clear
rain showers
thunderstorm
thunderstorm
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
rain showers
rain showers
clear
clear
some clouds
light rain
light rain
clear
clear
clear
clear
clear
some clouds
some clouds
risk tstorm
risk tstorm
clear
some clouds
some clouds
clear
some clouds
clear
rain shwrs
risk tstorm
risk tstorm
some clouds
clear
clear
clear
clear
clear
clear
clear
clear
some clouds
some clouds
rain shwrs
rain shwrs
 km/h
20
SSE
10
S
15
S
10
S
10
WSW
10
SSE
20
SSE
10
SW
10
SSE
20
SSE
10
SSW
15
S
10
SSW
15
SW
15
WNW
10
NW
10
N
10
E
15
SE
5
S
15
S
15
SSW
5
NNW
5
ENE
15
SE
10
N
10
E
15
SE
5
SW
10
SSE
15
SSE
10
SW
15
SW
10
WSW
10
WNW
5
NE
 mm 
1
2
1
3
1
5
4
1
1
max°C
21
21
26
24
24
27
30
27
28
30
26
31
28
28
30
33
26
21
21
20
26
26
25
24
25
23
21
22
20
23
24
21
30
34
30
27
Moonrise
10:18
10:40
11:00
11:21
11:44
12:11
12:45
1:28
2:24
3:32
4:47
6:03
Moonset
8:00
9:13
10:26
11:39
12:53
2:11
3:30
4:49
6:03
7:06
7:56
8:34
9:04
Sunrise
5:15
5:16
5:16
5:18
5:18
5:20
5:20
5:22
5:22
5:22
5:24
5:24
Sunset
8:21
8:21
8:20
8:19
8:19
8:17
8:16
8:15
8:15
8:15
8:14
8:13
Today's sea temperature in Seavey Island, Portsmouth Harbor is 18.4 °C (Statistics for 13 Jul 1981-2005 – mean: 17.8 max: 19.2 min: 16.0°C)
Issued (local time): 1 pm Sunday 13 Jul 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest