Portland Sea Conditions and Tide Table

Portland 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 07:01 AM and sunset is at 06:39 PM.

Days 1–3 Weather Summary

Some drizzle, heaviest during Thu morning. Icy conditions (max 20°C on Tue afternoon, min -2°C on Thu night). Wind will be generally light.

Days 4–6 Weather Summary

A moderate fall of snow, heaviest on Fri night. Icy conditions (max 9°C on Sun night, min -2°C on Fri morning). Winds increasing (calm on Sat night, fresh winds from the S by Sun night).

Days 7–9 Weather Summary

Light rain (total 5mm), mostly falling on Mon morning. Freeze-thaw conditions (max 12°C on Mon afternoon, min -7°C on Wed morning). Winds decreasing (fresh winds from the S on Mon morning, calm by Wed night).

Days 10–12 Weather Summary

Mostly dry. Freeze-thaw conditions (max 7°C on Fri afternoon, min -2°C on Thu morning). Wind will be generally light.

Tuesday
10
Wednesday
11
Thursday
12
Friday
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Wed
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
High Tide
5:04PM2.30m
5:14AM2.56m
6:02PM2.21m
6:13AM2.51m
7:05PM2.18m
7:15AM2.51m
8:06PM2.22m
8:15AM2.58m
9:00PM2.33m
9:08AM2.69m
9:46PM2.48m
9:55AM2.82m
10:26PM2.65m
10:38AM2.94m
11:04PM2.84m
11:20AM3.04m
11:41PM3.01m
12:01PM3.11m
00:19AM3.16m
12:44PM3.12m
1:00AM3.26m
1:29PM3.08m
1:43AM3.30m
2:17PM2.98m
2:31AM3.27m
3:10PM2.85m
3:23AM3.18m
4:09PM2.70m
Low Tide
10:50AM0.36m
10:56PM0.61m
11:47AM0.46m
11:53PM0.68m
12:50PM0.50m
00:54AM0.70m
1:52PM0.48m
1:56AM0.65m
2:47PM0.39m
2:51AM0.53m
3:34PM0.27m
3:40AM0.37m
4:14PM0.14m
4:24AM0.19m
4:53PM0.01m
5:06AM0.01m
5:30PM-0.09m
5:48AM-0.16m
6:08PM-0.16m
6:31AM-0.28m
6:48PM-0.18m
7:16AM-0.35m
7:31PM-0.14m
8:04AM-0.34m
8:17PM-0.06m
8:55AM-0.27m
9:08PM0.07m
9:53AM-0.15m
Wave
height (m) 
direction
period (s) 
0.8
SE
8
0.9
SE
8
0.9
SSE
6
1.2
E
5
0.8
E
6
1.8
SSE
6
1.7
SSE
8
1.3
SSE
8
0.9
SSE
8
0.7
SSE
8
0.9
SSE
8
1.6
SSE
6
1.6
SSE
7
1.1
SE
8
0.7
SSE
9
0.5
SE
7
1.1
SSE
4
2.1
SSE
7
3
SSE
8
3.5
SSE
9
2.3
SSE
10
1.7
SSE
10
1.6
SSE
10
1.4
SSE
10
1.2
SE
10
1.1
SE
9
0.9
SE
9
1.1
SE
8
1.4
S
5
1.4
S
6
1.5
S
5
1.3
S
6
1.1
SSE
6
0.9
ESE
10
0.9
ESE
10
0.8
ESE
9
0.6
ESE
9
0.5
ESE
9
0.7
ESE
8
1.1
NE
5
0.6
ESE
8
0.4
SE
8
0.3
SE
8
0.4
SE
8
0.4
SSE
3
1.3
SSE
5
1.6
SSE
7
clear
clear
part cloud
cloud
cloud
part cloud
rain showers
cloud
part cloud
clear
part cloud
mod snow
snow showers
part cloud
cloud
cloud
light snow
cloud
light rain
cloud
light rain
cloud
part cloud
part cloud
clear
cloud
clear
part cloud
part cloud
part cloud
cloud
cloud
part cloud
part cloud
cloud
part cloud
part cloud
part cloud
cloud
cloud
part cloud
part cloud
cloud
light snow
light snow
light rain
mod rain
clear
clear
some clouds
cloudy
cloudy
some clouds
rain shwrs
cloudy
some clouds
clear
some clouds
mod snow
snow shwrs
some clouds
cloudy
cloudy
light snow
cloudy
light rain
cloudy
light rain
cloudy
some clouds
some clouds
clear
cloudy
clear
some clouds
some clouds
some clouds
cloudy
cloudy
some clouds
some clouds
cloudy
some clouds
some clouds
some clouds
cloudy
cloudy
some clouds
some clouds
cloudy
light snow
light snow
light rain
mod rain
 km/h
10
SW
15
SW
10
NE
15
ENE
5
ENE
15
SSW
30
WSW
20
WNW
10
W
10
W
20
S
20
SE
20
NW
5
NNE
5
N
15
SE
20
SSE
25
S
35
S
30
S
15
WNW
15
W
20
WNW
15
WNW
20
WNW
20
WNW
10
SW
15
SSW
25
S
20
SSW
25
SSW
20
SW
15
W
10
WNW
10
NW
10
ENE
10
SSE
10
SE
20
N
15
NNE
5
NNW
10
NE
0
WSW
15
SSW
15
SSE
20
S
15
SW
 mm 
1
3
2
1
7
max°C
15
20
17
3
2
13
14
5
0
1
3
2
2
4
1
0
2
9
11
12
9
1
1
-3
-5
-1
-1
1
2
2
1
7
5
4
7
3
3
6
4
-3
1
-1
-1
0
0
2
5
Moonrise
1:40
2:40
3:32
4:17
4:53
5:23
5:48
6:10
6:30
6:51
7:12
7:37
8:07
8:45
9:35
10:37
Moonset
10:04
10:49
11:43
12:45
1:52
3:03
4:15
5:27
6:41
7:56
9:14
10:34
11:55
1:13
2:21
Sunrise
7:01
7:01
6:58
6:56
6:54
6:54
6:52
6:50
6:48
6:46
6:45
6:43
6:41
6:39
6:37
6:35
Sunset
6:39
6:40
6:42
6:44
6:45
6:45
6:46
6:49
6:50
6:51
6:52
6:52
6:54
6:55
6:57
6:58
Today's sea temperature in Portland is
1.6° C
(Statistics for 10 Mar 1981-2005 – mean: 2.9 max: 4.1 min: 1.4°C)
Issued (local time): 1 am Tuesday 10 Mar 2026
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest