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 07:07 AM and sunset is at 04:05 PM.

Days 1–3 Weather Summary

Moderate rain (total 13mm), heaviest on Fri afternoon. Icy conditions (max 12°C on Fri morning, min -3°C on Tue night). Winds increasing (calm on Wed night, near gales from the SSE by Fri morning).

Days 4–6 Weather Summary

Mostly dry. Icy conditions (max 5°C on Fri night, min -7°C on Mon afternoon). Winds decreasing (fresh winds from the WNW on Fri night, light winds from the WNW by Sat afternoon).

Days 7–9 Weather Summary

Mostly dry. Freeze-thaw conditions (max 1°C on Wed morning, min -9°C on Wed night). Wind will be generally light.

Days 10–12 Weather Summary

A dusting of snow on Thu night. Freezing level rising with drizzle on Thu night. Freeze-thaw conditions (max 3°C on Fri morning, min -9°C on Sat night). Mainly fresh winds.

Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sun
28
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
9:09AM2.82m
9:48PM2.48m
9:48AM2.86m
10:28PM2.49m
10:25AM2.88m
11:05PM2.50m
11:01AM2.90m
11:41PM2.50m
11:37AM2.91m
00:17AM2.50m
12:13PM2.91m
00:54AM2.51m
12:52PM2.89m
1:32AM2.54m
1:33PM2.87m
2:13AM2.58m
2:18PM2.83m
2:58AM2.65m
3:08PM2.77m
3:45AM2.73m
4:03PM2.71m
4:37AM2.83m
5:03PM2.66m
Low Tide
3:36PM0.14m
3:35AM0.45m
4:16PM0.10m
4:13AM0.44m
4:53PM0.08m
4:49AM0.43m
5:29PM0.07m
5:24AM0.42m
6:04PM0.06m
6:01AM0.41m
6:39PM0.06m
6:40AM0.40m
7:17PM0.06m
7:22AM0.38m
7:56PM0.06m
8:07AM0.36m
8:39PM0.07m
8:58AM0.32m
9:26PM0.09m
9:53AM0.27m
10:16PM0.11m
10:53AM0.19m
Wave
height (m) 
direction
period (s) 
2
S
7
1.7
S
7
0.9
SSE
8
0.4
SSE
9
1
S
4
1.5
SSE
6
2.5
SSE
7
4.5
SSE
10
2.5
SSE
11
1.7
SSE
11
1.4
SE
11
1
SE
10
1.5
S
6
1.2
SE
11
1.2
SE
10
0.8
ESE
10
0.8
ESE
10
0.7
ESE
10
0.3
ESE
10
0.3
ESE
10
0.8
SSW
5
0.3
SSW
5
0.7
N
3
0.6
N
4
0.4
NE
2
0.4
E
3
1.3
SSE
5
1.4
SE
7
1.3
SSE
8
1
SE
8
0.8
SE
8
0.9
WNW
4
0.9
W
4
1
W
4
1.3
WSW
5
part cloud
part cloud
clear
part cloud
clear
cloud
light rain
mod rain
part cloud
clear
part cloud
cloud
part cloud
clear
clear
clear
clear
clear
cloud
cloud
clear
part cloud
clear
clear
part cloud
cloud
light snow
clear
part cloud
clear
clear
clear
clear
clear
cloud
some clouds
some clouds
clear
some clouds
clear
cloudy
light rain
mod rain
some clouds
clear
some clouds
cloudy
some clouds
clear
clear
clear
clear
clear
cloudy
cloudy
clear
some clouds
clear
clear
some clouds
cloudy
light snow
clear
some clouds
clear
clear
clear
clear
clear
cloudy
 km/h
25
SW
25
WSW
10
WNW
10
SW
20
SSW
10
S
30
S
30
SSW
25
W
20
NW
15
W
15
SSW
20
SW
15
WSW
20
WNW
20
NW
20
NW
15
NW
5
W
10
SW
10
WNW
5
WNW
25
NNW
15
NNW
10
ENE
10
ESE
25
SSE
20
W
25
WNW
20
NW
25
WNW
25
WNW
25
W
25
W
30
W
 mm 
4
9
1
max°C
4
6
4
3
4
10
12
12
5
-1
-1
1
4
3
2
-4
-5
-7
-5
-2
-2
1
-3
-7
-6
-1
2
3
1
-2
-6
-6
-8
-6
-7
Moonrise
5:10
6:13
7:12
8:04
8:47
9:23
9:51
10:15
10:36
10:56
11:15
11:36
Moonset
1:58
2:36
3:23
4:19
5:22
6:29
7:38
8:48
9:57
11:08
12:20
Sunrise
7:07
7:09
7:09
7:09
7:11
7:11
7:11
7:11
7:11
7:13
7:13
7:13
Sunset
4:05
4:05
4:06
4:06
4:07
4:07
4:07
4:07
4:08
4:08
4:09
4:10
Today's sea temperature in Portland is
6.4° C
(Statistics for 17 Dec 1981-2005 – mean: 6.4 max: 7.7 min: 5.0°C)
Issued (local time): 12 am Wednesday 17 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest