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 — and sunset is at —.

Days 1–4 Weather Summary

Mostly dry. Warm air temperatures (max 26°C on Sun afternoon, min 7°C on Thu night). Winds increasing (calm on Sat afternoon, fresh winds from the N by Sun afternoon).

Days 5–7 Weather Summary

Mostly dry. Warm air temperatures (max 25°C on Wed afternoon, min 7°C on Mon morning). Mainly fresh winds.

Days 8–10 Weather Summary

Heavy rain (total 21mm), heaviest during Sat morning. Warm (max 27°C on Thu afternoon, min 3°C on Sat morning). Mainly strong winds.

Days 11–13 Weather Summary

Light rain (total 3mm), mostly falling on Sat night. Very mild (max 17°C on Tue night, min 7°C on Sat night). Wind will be generally light.

Friday
5
Saturday
6
Sunday
7
Monday
8
Tuesday
9
Wednesday
10
Thursday
11
Friday
12
Saturday
13
Sunday
14
Monday
15
Tue
16
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
10:36PM0.40m
00:30AM0.41m
1:59AM0.41m
3:22AM0.38m
4:29AM0.34m
4:37AM0.29m
2:12AM0.26m
9:59AM0.24m
1:02AM0.25m
3:01PM0.23m
00:03AM0.26m
11:24PM0.28m
11:09PM0.30m
11:06PM0.31m
Low Tide
11:59AM-0.05m
1:05PM-0.04m
2:12PM-0.02m
3:19PM0.02m
4:25PM0.08m
5:17PM0.13m
7:23AM0.24m
5:55PM0.19m
7:52AM0.19m
5:41PM0.23m
8:34AM0.15m
9:07AM0.12m
9:36AM0.10m
10:04AM0.09m
Wave
height (m) 
direction
period (s) 
0.9
E
6
0.7
E
6
0.5
E
6
0.5
E
6
0.5
SE
6
0.4
ESE
6
0.4
SE
5
0.4
SE
5
0.4
ESE
5
1.2
NE
5
0.9
ENE
6
0.7
ENE
7
0.5
E
6
0.4
ENE
5
0.4
ENE
5
0.9
SSE
4
1
SSE
5
0.9
SSE
5
1.2
SSE
6
1.1
SSE
6
1.1
SSE
6
1
SSE
6
1.5
ENE
6
1.2
ENE
7
1.3
E
8
1.3
E
8
1.3
E
8
1.5
E
8
1.5
ESE
8
1.3
ESE
8
1.1
ESE
7
1
ESE
7
1
ESE
7
0.9
ESE
7
0.8
ESE
7
0.7
ESE
7
cloud
cloud
cloud
cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
clear
clear
part cloud
part cloud
part cloud
heavy rain
light rain
light rain
part cloud
cloud
cloud
cloud
cloud
part cloud
clear
part cloud
cloudy
cloudy
cloudy
cloudy
some clouds
some clouds
some clouds
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
some clouds
cloudy
clear
clear
some clouds
some clouds
some clouds
heavy rain
light rain
light rain
some clouds
cloudy
cloudy
cloudy
cloudy
some clouds
clear
some clouds
 km/h
20
NNE
15
NNE
10
N
10
NE
10
NNE
5
SE
5
SSW
10
W
25
NNW
30
N
20
NNE
15
NE
10
NE
10
ENE
15
SSE
20
S
25
SSW
15
S
20
S
25
SSW
25
S
10
SSW
40
NNE
30
NNE
20
NNE
20
N
25
N
20
NNE
20
NNE
15
NNE
15
NE
20
NNE
20
NNE
20
NNE
15
NE
15
E
 mm 
18
3
3
max°C
9
8
11
14
17
19
19
23
26
17
11
15
14
16
17
18
22
25
22
25
27
23
11
13
11
5
7
10
14
16
16
15
16
15
14
16
Moonrise
6:19
7:29
8:39
9:46
10:49
11:47
12:43
1:37
2:30
3:23
4:18
Moonset
8:01
9:07
10:04
10:50
11:29
12:02
12:32
1:00
1:28
1:57
2:27
3:02
Sunrise
7:05
7:05
7:07
7:07
7:07
7:09
7:09
7:09
7:11
7:11
7:11
7:13
Sunset
5:32
5:32
5:34
5:34
5:34
5:34
5:34
5:35
5:35
5:35
5:36
5:36
Today's sea temperature in Portland is
21.1° C
(Statistics for 04 Dec 1981-2005 – mean: 21.9 max: 23.3 min: 20.6°C)
Issued (local time): 11 pm Thursday 04 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest