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 06:09 AM and sunset is at 06:23 PM.

Days 1–3 Weather Summary

Light rain (total 8mm), mostly falling on Fri afternoon. Cool air temperatures (max 11°C on Fri morning, min 7°C on Sun night). Winds decreasing (fresh winds from the E on Fri morning, calm by Sun afternoon).

Days 4–6 Weather Summary

Some drizzle, heaviest during Wed night. Cool air temperatures (max 12°C on Tue afternoon, min 7°C on Mon morning). Wind will be generally light.

Days 7–9 Weather Summary

Heavy rain (total 24mm), heaviest during Thu night. Very mild (max 10°C on Thu morning, min 7°C on Fri night). Winds increasing (moderate winds from the W on Thu morning, strong winds from the S by Sat morning).

Days 10–12 Weather Summary

Light rain (total 3mm), mostly falling on Sun morning. Very mild (max 11°C on Mon night, min 7°C on Sun night). Winds decreasing (strong winds from the WSW on Mon night, light winds from the SW by Tue night).

Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
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
10:30AM1.49m
10:51PM1.53m
11:15AM1.32m
11:43PM1.38m
8:21AM0.87m
12:23PM1.17m
8:48PM0.97m
8:33AM0.80m
1:52PM1.11m
9:03PM0.89m
4:56PM1.22m
4:51AM1.43m
5:39PM1.49m
5:42AM1.70m
6:13PM1.74m
6:19AM1.94m
6:45PM1.96m
6:54AM2.14m
1:01PM0.09m
7:18PM2.12m
7:31AM2.25m
2:01PM0.10m
7:53PM2.20m
8:08AM2.26m
2:47PM0.15m
8:30PM2.19m
8:47AM2.18m
3:56PM0.25m
9:07PM2.10m
Low Tide
4:05PM0.42m
4:32AM0.50m
4:41PM0.54m
5:18AM0.62m
9:07AM0.86m
5:30PM0.70m
9:39PM0.96m
6:41AM0.74m
7:09PM0.82m
11:21AM0.52m
11:39PM0.64m
12:02PM0.34m
00:17AM0.49m
12:39PM0.20m
00:53AM0.37m
1:18PM0.11m
11:50PM0.29m
12:13PM0.09m
00:10AM0.18m
12:32PM0.04m
00:42AM0.12m
1:03PM0.05m
1:19AM0.12m
1:41PM0.12m
2:03AM0.17m
Wave
height (m) 
direction
period (s) 
1.1
ESE
5
1.2
ESE
6
1.2
SE
6
1
SW
10
1
SW
10
0.6
SW
9
0.4
SW
8
0.3
SW
6
0.3
N
2
0.3
NE
2
0.1
SW
9
0.1
SW
8
0.3
WNW
2
0.2
WSW
7
0.2
WSW
13
0.2
WSW
12
0.2
WSW
12
0.5
SW
3
0.6
SW
4
1
SW
5
2.2
SW
7
1.4
SW
7
1
SW
8
1
SW
7
1.1
SW
5
2.2
SW
7
2.5
SW
8
2.4
SW
10
1.9
SW
16
1.5
SW
15
1.1
SW
9
0.9
SW
8
1.6
SW
6
1.1
SW
7
0.9
SW
7
0.8
SW
17
cloud
light rain
rain showers
part cloud
part cloud
part cloud
cloud
light rain
rain showers
part cloud
clear
part cloud
cloud
part cloud
clear
clear
part cloud
rain showers
part cloud
cloud
heavy rain
cloud
part cloud
clear
light rain
rain showers
light rain
rain showers
part cloud
clear
part cloud
cloud
rain showers
part cloud
part cloud
part cloud
cloudy
light rain
rain shwrs
some clouds
some clouds
some clouds
cloudy
light rain
rain shwrs
some clouds
clear
some clouds
cloudy
some clouds
clear
clear
some clouds
rain shwrs
some clouds
cloudy
heavy rain
cloudy
some clouds
clear
light rain
rain shwrs
light rain
rain shwrs
some clouds
clear
some clouds
cloudy
rain shwrs
some clouds
some clouds
some clouds
 km/h
30
E
25
ESE
20
SE
15
ESE
15
ESE
5
NE
10
ENE
0
WNW
15
NNE
20
NNE
10
NW
10
NW
20
WNW
10
WNW
10
N
5
W
20
WSW
20
SW
20
W
35
SW
40
SW
25
NW
25
NW
20
W
35
SSW
30
W
40
WSW
30
NW
30
WNW
35
NW
30
WNW
30
WSW
45
WSW
20
W
25
SW
15
S
 mm 
3
1.0
3
1.0
1.0
16
2.0
2.0
4
1.0
2.0
max°C
11
11
11
11
11
10
10
10
10
9
11
10
9
12
10
9
9
9
10
10
10
9
10
7
9
9
8
9
10
8
10
9
11
11
11
10
Moonrise
1:44
2:46
3:37
4:15
4:42
5:03
5:20
5:34
5:48
7:03
7:21
7:43
Moonset
8:37
9:25
10:29
11:45
1:09
2:36
4:04
5:32
7:02
9:34
11:08
Sunrise
6:09
6:07
6:05
6:03
6:01
5:58
5:56
5:54
5:52
6:50
5:48
5:46
Sunset
6:23
6:24
6:27
6:29
6:30
6:31
6:32
6:35
6:37
7:37
6:39
6:42
Today's sea temperature in Portland is 8.5 °C (Statistics for 21 Mar 1981-2005 – mean: 9.3 max: 10.6 min: 7.3°C)
Issued (local time): 11 am Friday 21 Mar 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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