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 06:58 PM.

Days 1–4 Weather Summary

Some drizzle, heaviest during Mon afternoon. Cool air temperatures (max 14°C on Tue afternoon, min 2°C on Mon night). Wind will be generally light.

Days 5–7 Weather Summary

Moderate rain (total 17mm), heaviest on Fri morning. Cool air temperatures (max 12°C on Sat afternoon, min 2°C on Fri afternoon). Winds decreasing (fresh winds from the NNW on Fri afternoon, calm by Sat night).

Days 8–10 Weather Summary

Heavy rain (total 27mm), heaviest during Mon night. Very mild (max 14°C on Tue afternoon, min 3°C on Mon morning). Wind will be generally light.

Days 11–13 Weather Summary

Some drizzle, heaviest during Wed afternoon. Freeze-thaw conditions (max 16°C on Sat afternoon, min 0°C on Wed night). Wind will be generally light.

Mon
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Sat
29
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
4:02PM0.59m
4:19AM0.70m
4:41PM0.56m
4:57AM0.69m
5:24PM0.52m
5:39AM0.66m
6:14PM0.49m
6:28AM0.65m
7:14PM0.47m
7:26AM0.64m
8:20PM0.47m
8:30AM0.64m
9:23PM0.50m
9:32AM0.66m
10:18PM0.55m
10:30AM0.69m
11:06PM0.62m
11:22AM0.73m
11:52PM0.71m
12:12PM0.77m
00:36AM0.79m
1:00PM0.79m
1:21AM0.86m
Low Tide
11:01AM0.04m
11:05PM0.08m
11:47AM0.06m
11:46PM0.12m
12:35PM0.09m
00:32AM0.16m
1:28PM0.11m
1:23AM0.19m
2:24PM0.12m
2:21AM0.21m
3:22PM0.12m
3:21AM0.21m
4:16PM0.10m
4:20AM0.18m
5:07PM0.07m
5:15AM0.12m
5:53PM0.03m
6:06AM0.06m
6:37PM-0.01m
6:56AM-0.01m
7:20PM-0.04m
7:44AM-0.07m
8:02PM-0.07m
8:33AM-0.12m
Wave
height (m) 
direction
period (s) 
light rain
part cloud
clear
clear
clear
clear
clear
part cloud
cloud
part cloud
light rain
mod rain
light rain
rain showers
part cloud
part cloud
part cloud
clear
part cloud
part cloud
light rain
light rain
mod rain
clear
part cloud
mod rain
mod rain
light rain
clear
clear
part cloud
part cloud
part cloud
clear
part cloud
part cloud
light rain
some clouds
clear
clear
clear
clear
clear
some clouds
cloudy
some clouds
light rain
mod rain
light rain
rain shwrs
some clouds
some clouds
some clouds
clear
some clouds
some clouds
light rain
light rain
mod rain
clear
some clouds
mod rain
mod rain
light rain
clear
clear
some clouds
some clouds
some clouds
clear
some clouds
some clouds
 km/h
20
NNW
20
NNW
15
N
10
N
0
S
5
SE
10
S
5
SE
15
SSE
15
SSE
20
SE
30
NNW
30
NNW
25
NW
15
NW
10
WNW
0
WNW
15
NW
15
NW
5
N
15
SE
20
SSE
10
SSW
15
WSW
10
W
10
N
15
NNW
15
WNW
5
W
10
WNW
15
W
5
W
10
W
15
S
15
SSW
20
SSW
 mm 
1.0
4
10
2.0
1.0
1.0
4
8
8
6
1.0
max°C
10
6
6
14
10
10
14
7
7
11
11
4
2
3
9
12
8
11
13
7
7
9
11
12
14
9
4
7
4
6
10
8
10
14
9
14
Moonrise
10:37
11:41
12:45
1:47
2:45
3:36
4:19
4:54
5:24
5:50
6:14
6:37
Moonset
8:09
8:32
9:00
9:34
10:17
11:10
12:13
1:23
2:38
3:54
5:11
6:29
7:49
Sunrise
6:58
6:56
6:54
6:52
6:50
6:48
6:47
6:46
6:43
6:41
6:41
6:39
Sunset
6:58
6:59
7:00
7:01
7:02
7:04
7:05
7:06
7:07
7:07
7:08
7:09
Today's sea temperature in Portland is 4.4 °C (Statistics for 17 Mar 1981-2005 – mean: 4.0 max: 6.0 min: 2.3°C)
Issued (local time): 1 pm Monday 17 Mar 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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