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 06:46 PM.

Days 1–4 Weather Summary

Heavy rain (total 25mm), heaviest during Mon morning. Cool air temperatures (max 11°C on Sun night, min 2°C on Wed morning). Winds decreasing (fresh winds from the S on Sun night, calm by Tue night).

Days 5–7 Weather Summary

Light rain (total 3mm), mostly falling on Thu night. Cool air temperatures (max 12°C on Sat afternoon, min 1°C on Fri night). Winds decreasing (fresh winds from the NNW on Fri morning, light winds from the W by Sat afternoon).

Days 8–10 Weather Summary

Moderate rain (total 17mm), heaviest on Tue morning. Mild temperatures (max 9°C on Sat night, min 3°C on Mon morning). Wind will be generally light.

Days 11–13 Weather Summary

Heavy rain (total 22mm), heaviest during Tue night. Very mild (max 11°C on Wed afternoon, min 2°C on Fri morning). Winds increasing (calm on Wed night, fresh winds from the NW by Fri afternoon).

Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Fri
28
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
PM
Wave Height Map
High Tide
1:39AM2.88m
2:03PM2.71m
2:10AM2.84m
2:39PM2.59m
2:44AM2.78m
3:19PM2.47m
3:23AM2.71m
4:04PM2.36m
4:09AM2.64m
4:56PM2.27m
5:01AM2.59m
5:52PM2.22m
5:59AM2.59m
6:54PM2.23m
7:03AM2.64m
7:57PM2.34m
8:08AM2.76m
8:53PM2.52m
9:05AM2.92m
9:42PM2.76m
9:57AM3.08m
10:28PM3.00m
10:47AM3.21m
Low Tide
7:28PM0.16m
7:51AM0.06m
8:00PM0.25m
8:27AM0.12m
8:33PM0.35m
9:06AM0.20m
9:12PM0.45m
9:49AM0.29m
9:55PM0.55m
10:39AM0.37m
10:46PM0.62m
11:34AM0.41m
11:41PM0.66m
12:34PM0.41m
00:42AM0.62m
1:37PM0.34m
1:47AM0.51m
2:35PM0.20m
2:48AM0.32m
3:26PM0.02m
3:42AM0.08m
4:13PM-0.14m
4:33AM-0.15m
4:59PM-0.28m
Wave
height (m) 
direction
period (s) 
2.1
SSE
7
2
SSE
8
1.9
SSE
8
1.6
SSE
9
1.4
SSE
10
1.4
SSE
10
1.3
SSE
10
1.2
SE
9
1.1
SE
9
1.2
SE
13
1.3
SE
12
1.6
SE
11
1.9
SE
10
1.7
ESE
10
1.4
SE
10
1.1
SE
10
0.7
ESE
9
0.7
ESE
9
0.5
ESE
9
0.5
ESE
9
0.4
ESE
9
0.4
ESE
9
0.6
E
10
0.7
ESE
10
1.1
ESE
5
1.8
SE
7
2
ESE
8
1.9
SE
8
1.4
ESE
8
1.3
SE
8
1.4
SE
9
1.2
SE
9
1.2
SE
9
1.4
SE
8
1.1
SE
9
1.2
SE
9
light rain
heavy rain
light rain
light rain
cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
cloud
light rain
light rain
part cloud
clear
clear
part cloud
cloud
part cloud
cloud
cloud
cloud
cloud
light rain
mod rain
light rain
heavy rain
part cloud
cloud
part cloud
part cloud
light rain
part cloud
cloud
part cloud
light rain
heavy rain
light rain
light rain
cloudy
some clouds
clear
clear
some clouds
some clouds
some clouds
cloudy
light rain
light rain
some clouds
clear
clear
some clouds
cloudy
some clouds
cloudy
cloudy
cloudy
cloudy
light rain
mod rain
light rain
heavy rain
some clouds
cloudy
some clouds
some clouds
light rain
some clouds
cloudy
some clouds
 km/h
30
S
15
S
10
S
15
NNW
15
NNW
5
N
5
NNE
10
ENE
10
SE
10
SSE
15
SSE
20
SSE
20
S
30
NNW
30
NNW
20
NNW
10
NNW
10
S
0
NNW
5
ENE
10
ESE
5
NE
10
ENE
15
ESE
15
SE
20
E
5
ESE
20
N
10
WSW
10
W
5
NNW
10
SSW
20
WSW
15
WSW
20
NW
25
NW
 mm 
4
16
1.0
4
2.0
1.0
5
7
5
21
1.0
max°C
11
10
9
8
6
11
9
5
4
3
5
7
9
2
5
3
8
12
9
8
9
7
3
3
3
4
6
6
8
11
8
6
10
6
5
5
Moonrise
9:28
10:33
11:38
12:44
1:47
2:45
3:36
4:17
4:51
5:19
5:43
6:05
Moonset
7:36
7:55
8:16
8:43
9:16
9:58
10:50
11:53
1:05
2:21
3:40
4:59
6:20
Sunrise
6:50
6:48
6:46
6:45
6:43
6:41
6:39
6:37
6:35
6:33
6:31
6:30
Sunset
6:46
6:49
6:50
6:51
6:52
6:52
6:54
6:55
6:57
6:58
6:59
7:00
7:01
Today's sea temperature in Portland, Casco Bay is 3.3 °C (Statistics for 16 Mar 1981-2005 – mean: 3.0 max: 4.2 min: 1.4°C)
Issued (local time): 7 pm Sunday 16 Mar 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest