Portland, Casco Bay Sea Conditions and Tide Table

Portland, Casco Bay 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 07:13 AM and sunset is at 04:08 PM.

Days 1–3 Weather Summary

Mostly dry. Icy conditions (max 1°C on Sun afternoon, min -12°C on Fri morning). Wind will be generally light.

Days 4–6 Weather Summary

A dusting of snow giving way to moderate rain (total 13mm) heaviest on Mon afternoon. Icy conditions (max 4°C on Mon morning, min -7°C on Tue night). Winds increasing (calm on Mon afternoon, fresh winds from the W by Tue afternoon).

Days 7–9 Weather Summary

A dusting of new snow. Temperatures will be below freezing (max 0°C on Thu morning, min -16°C on Fri night). Wind will be generally light.

Days 10–12 Weather Summary

A light covering of new snow, mostly falling on Tue afternoon. Temperatures will be below freezing (max -1°C on Mon afternoon, min -11°C on Sun morning). Wind will be generally light.

Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thursday
1
Friday
2
Saturday
3
Sunday
4
Monday
5
Tuesday
6
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
3:09PM2.78m
3:46AM2.73m
4:04PM2.72m
4:37AM2.83m
5:02PM2.67m
5:31AM2.94m
6:05PM2.65m
6:29AM3.06m
7:11PM2.67m
7:29AM3.18m
8:13PM2.70m
8:26AM3.27m
9:13PM2.78m
9:23AM3.37m
10:10PM2.86m
10:19AM3.43m
11:05PM2.91m
11:14AM3.44m
11:58PM2.95m
12:07PM3.39m
00:49AM2.95m
12:59PM3.27m
1:38AM2.92m
Low Tide
9:00AM0.33m
9:28PM0.09m
9:55AM0.27m
10:18PM0.12m
10:53AM0.20m
11:10PM0.14m
11:54AM0.09m
00:07AM0.15m
12:58PM-0.03m
1:08AM0.12m
2:00PM-0.18m
2:06AM0.10m
2:58PM-0.29m
3:04AM0.03m
3:54PM-0.39m
4:01AM-0.03m
4:50PM-0.45m
4:56AM-0.07m
5:42PM-0.46m
5:51AM-0.08m
6:33PM-0.41m
6:43AM-0.05m
7:21PM-0.30m
Wave
height (m) 
direction
period (s) 
0.7
E
11
0.4
ESE
10
0.4
ESE
10
0.6
ESE
12
0.5
E
12
0.4
ESE
12
0.3
ESE
12
0.2
ESE
12
0.2
E
11
0.5
S
4
1
SSE
5
1.4
SSE
6
1.8
SSW
7
1.5
SSW
7
1.4
SW
6
1.2
SW
6
1.3
SW
6
1
SW
5
1.2
S
6
1.4
S
6
1.1
S
7
0.5
S
9
0.3
SSE
10
0.5
SSE
9
0.4
SSE
8
0.3
SSE
7
0.3
SE
7
0.3
ESE
11
0.3
ESE
10
0.3
ESE
9
0.4
ESE
9
0.3
ESE
12
0.3
ESE
11
0.4
ESE
12
0.5
ESE
12
1.3
ENE
5
clear
part cloud
cloud
cloud
clear
clear
clear
part cloud
cloud
light snow
mod rain
rain showers
part cloud
part cloud
part cloud
clear
part cloud
part cloud
light snow
cloud
snow showers
part cloud
part cloud
clear
clear
clear
clear
clear
cloud
cloud
part cloud
clear
cloud
cloud
light snow
light snow
clear
some clouds
cloudy
cloudy
clear
clear
clear
some clouds
cloudy
light snow
mod rain
rain shwrs
some clouds
some clouds
some clouds
clear
some clouds
some clouds
light snow
cloudy
snow shwrs
some clouds
some clouds
clear
clear
clear
clear
clear
cloudy
cloudy
some clouds
clear
cloudy
cloudy
light snow
light snow
 km/h
15
NNW
5
NNE
10
NNE
10
N
5
NNW
10
WNW
10
NW
5
WSW
0
E
10
NE
10
WSW
30
W
30
WSW
30
W
30
W
25
W
30
W
20
SW
15
SSW
10
SW
20
WNW
10
NNW
10
NNW
10
N
10
NNW
5
NW
5
NNW
0
NW
0
SW
5
NNW
5
N
0
WNW
5
WNW
5
NNE
10
NNE
20
NNE
 mm 
4
8
1
max°C
-9
-8
-10
-7
-5
-5
0
1
-1
4
4
3
-2
-4
-7
-3
-3
-2
0
0
-6
-10
-10
-13
-11
-9
-9
-8
-5
-5
-2
-1
-2
-1
-2
-1
Moonrise
10:56
11:15
11:36
12:01
12:31
1:10
2:03
3:10
4:27
5:48
7:07
8:22
Moonset
11:08
12:20
1:36
2:56
4:18
5:39
6:50
7:48
8:32
9:04
9:30
Sunrise
7:13
7:13
7:13
7:13
7:13
7:13
7:13
7:13
7:13
7:13
7:13
7:13
Sunset
4:08
4:09
4:10
4:12
4:12
4:13
4:14
4:15
4:15
4:16
4:17
4:19
Today's sea temperature in Portland, Casco Bay is
5.5° C
(Statistics for 26 Dec 1981-2005 – mean: 5.7 max: 6.8 min: 3.9°C)
Issued (local time): 6 am Friday 26 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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