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 — and sunset is at 04:06 PM.

Days 1–4 Weather Summary

Mostly dry. Icy conditions (max 5°C on Sun morning, min -7°C on Sun night). Wind will be generally light.

Days 5–7 Weather Summary

Light rain (total 3mm), mostly falling on Fri morning. Icy conditions (max 5°C on Fri morning, min -5°C on Tue night). Wind will be generally light.

Days 8–10 Weather Summary

Mostly dry. Freeze-thaw conditions (max 7°C on Fri afternoon, min -10°C on Fri night). Wind will be generally light.

Days 11–13 Weather Summary

Mostly dry. Freeze-thaw conditions (max 2°C on Mon afternoon, min -7°C on Tue night). Wind will be generally light.

Sat
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thu
1
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
11:45PM2.52m
11:40AM2.94m
00:22AM2.52m
12:16PM2.94m
00:57AM2.53m
12:54PM2.93m
1:35AM2.55m
1:34PM2.89m
2:15AM2.58m
2:19PM2.84m
2:59AM2.65m
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
Low Tide
5:31PM0.05m
5:26AM0.42m
6:06PM0.05m
6:04AM0.41m
6:42PM0.04m
6:42AM0.39m
7:18PM0.05m
7:23AM0.38m
7:58PM0.05m
8:09AM0.36m
8:41PM0.07m
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
Wave
height (m) 
direction
period (s) 
1.4
SSE
11
2
S
6
1.8
S
7
1.3
SSE
9
0.9
SE
10
0.7
SE
10
0.5
SE
9
0.4
SE
9
0.3
ESE
10
0.4
SE
10
0.9
ENE
4
0.7
ESE
5
0.6
ESE
5
0.5
ESE
6
0.8
S
4
1
S
5
0.6
ESE
10
1.1
S
4
1.2
S
6
1
N
4
0.9
SSE
11
0.5
SSE
10
0.3
SSE
9
0.6
S
3
0.8
S
4
0.9
SSE
5
0.8
SSE
5
0.8
SSE
6
1.2
NE
5
1.5
NE
5
1.6
SE
10
1.6
SE
11
1.1
SE
12
0.9
ESE
12
0.8
ESE
13
0.8
ESE
12
cloud
part cloud
clear
clear
clear
clear
clear
part cloud
cloud
cloud
cloud
part cloud
part cloud
part cloud
clear
part cloud
cloud
light rain
clear
clear
cloud
cloud
part cloud
cloud
cloud
cloud
part cloud
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
cloudy
some clouds
clear
clear
clear
clear
clear
some clouds
cloudy
cloudy
cloudy
some clouds
some clouds
some clouds
clear
some clouds
cloudy
light rain
clear
clear
cloudy
cloudy
some clouds
cloudy
cloudy
cloudy
some clouds
some clouds
clear
clear
clear
clear
clear
some clouds
some clouds
some clouds
 km/h
10
W
25
SW
25
WSW
25
WNW
20
NW
20
NW
10
NNW
5
W
5
NNW
10
NNE
15
NE
5
NNE
5
SSE
10
SW
10
SW
10
WSW
0
ENE
15
SSW
25
WNW
20
N
20
N
5
N
5
SSE
5
SSW
15
S
5
SE
10
NNW
15
N
20
N
20
NNE
15
N
10
N
10
N
5
NNW
5
NNW
5
NNE
 mm 
3
max°C
0
3
5
0
-2
-5
-5
-5
-3
-3
-3
-2
1
1
4
4
2
5
7
-4
-8
-7
-4
-1
2
2
2
2
-2
-3
-3
-6
-3
-2
-2
0
Moonrise
8:47
9:23
9:51
10:15
10:36
10:56
11:15
11:36
12:01
12:31
1:10
2:03
Moonset
4:19
5:21
6:29
7:38
8:48
9:57
11:08
12:20
1:36
2:56
4:18
5:39
Sunrise
7:11
7:11
7:11
7:11
7:11
7:13
7:13
7:13
7:13
7:13
7:13
7:13
Sunset
4:06
4:07
4:07
4:07
4:07
4:08
4:08
4:09
4:10
4:12
4:12
4:13
Today's sea temperature in Portland, Casco Bay is
6.0° C
(Statistics for 20 Dec 1981-2005 – mean: 6.1 max: 6.9 min: 4.5°C)
Issued (local time): 6 pm Saturday 20 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest