South Yarmouth Sea Conditions and Tide Table

South Yarmouth 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 07:00 AM and sunset is at 04:10 PM.

Days 1–3 Weather Summary

Mostly dry. Icy conditions (max 8°C on Wed morning, min -6°C on Mon morning). Winds decreasing (strong winds from the SW on Wed morning, light winds from the WNW by Wed night).

Days 4–6 Weather Summary

Moderate rain (total 10mm), heaviest on Fri morning. Icy conditions (max 13°C on Fri morning, min -4°C on Fri night). Winds decreasing (near gales from the S on Fri morning, light winds from the SSW by Sat afternoon).

Days 7–9 Weather Summary

Moderate rain (total 14mm), heaviest on Tue morning. Freeze-thaw conditions (max 9°C on Sun morning, min -6°C on Tue night). Winds increasing (calm on Mon night, near gales from the W by Tue night).

Days 10–12 Weather Summary

Light rain (total 6mm), mostly falling on Sat morning. Freeze-thaw conditions (max 9°C on Sat morning, min -6°C on Wed morning). Winds increasing (calm on Fri morning, strong winds from the SSW by Sat morning).

Monday
15
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
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
9:30AM0.86m
10:04PM0.77m
10:16AM0.87m
10:53PM0.77m
10:59AM0.89m
11:38PM0.77m
11:40AM0.90m
00:20AM0.78m
12:20PM0.91m
1:00AM0.78m
12:59PM0.91m
1:39AM0.78m
1:38PM0.92m
2:18AM0.79m
2:17PM0.91m
2:58AM0.79m
2:58PM0.91m
3:38AM0.80m
3:41PM0.90m
4:21AM0.81m
4:27PM0.88m
5:05AM0.83m
5:17PM0.87m
5:53AM0.86m
Low Tide
3:51PM0.08m
3:55AM0.13m
4:39PM0.05m
4:40AM0.13m
5:23PM0.04m
5:22AM0.12m
6:04PM0.02m
6:04AM0.12m
6:44PM0.01m
6:44AM0.11m
7:23PM-0.00m
7:24AM0.11m
8:01PM-0.01m
8:05AM0.11m
8:41PM-0.01m
8:47AM0.10m
9:22PM-0.01m
9:31AM0.10m
10:04PM-0.01m
10:18AM0.09m
10:48PM-0.00m
11:08AM0.09m
11:35PM0.01m
Wave
height (m) 
direction
period (s) 
0.9
NW
4
0.9
WNW
4
0.7
W
4
0.6
W
4
0.6
WSW
3
1
SW
4
1.3
SSW
5
1.4
SW
5
1.1
W
4
0.3
S
9
0.5
S
3
1.3
S
5
2.1
S
6
1.5
SSE
11
1.9
SE
11
1.1
SE
11
0.6
SSE
10
0.9
SSW
4
1.7
SSW
6
1.1
SW
6
1.1
W
4
0.8
WNW
4
0.3
SE
9
0.2
E
12
1.1
SSE
4
1.4
SSW
5
1.6
W
5
1
WNW
4
0.6
W
3
0.5
W
3
0.5
W
3
0.9
WNW
4
0.6
NW
4
0.1
E
9
0.3
S
2
0.8
S
4
part cloud
clear
part cloud
clear
clear
part cloud
clear
part cloud
clear
clear
clear
part cloud
mod rain
rain showers
part cloud
part cloud
part cloud
part cloud
cloud
clear
clear
clear
cloud
cloud
mod rain
light rain
clear
clear
part cloud
clear
clear
clear
part cloud
clear
part cloud
light rain
some clouds
clear
some clouds
clear
clear
some clouds
clear
some clouds
clear
clear
clear
some clouds
mod rain
rain shwrs
some clouds
some clouds
some clouds
some clouds
cloudy
clear
clear
clear
cloudy
cloudy
mod rain
light rain
clear
clear
some clouds
clear
clear
clear
some clouds
clear
some clouds
light rain
 km/h
35
NW
30
WNW
25
W
20
W
20
WSW
30
SW
40
SW
40
SW
40
WNW
10
S
25
S
40
S
55
SSE
25
WSW
50
W
25
NW
10
SSW
30
SSW
45
SW
30
WSW
35
W
30
NW
15
NNW
10
SSE
35
SSE
40
SW
50
W
35
NW
20
W
15
W
25
WNW
30
WNW
25
NW
0
NE
15
S
25
S
 mm 
9
1
10
4
3
max°C
-4
-4
-2
-1
0
6
8
7
4
2
7
11
13
8
1
-2
0
7
9
6
4
-1
-1
1
7
9
4
-3
-1
-1
0
0
-3
-1
1
8
Moonrise
2:56
3:59
5:02
6:04
7:03
7:55
8:39
9:15
9:45
10:11
10:34
10:55
Moonset
1:08
1:35
2:06
2:45
3:32
4:27
5:29
6:36
7:43
8:51
9:59
11:07
Sunrise
7:00
7:01
7:01
7:01
7:03
7:03
7:03
7:03
7:05
7:05
7:05
7:05
Sunset
4:10
4:10
4:10
4:12
4:12
4:12
4:13
4:13
4:14
4:15
4:15
4:15
Today's sea temperature in South Yarmouth is
5.9° C
(Statistics for 15 Dec 1981-2005 – mean: 8.4 max: 10.5 min: 6.9°C)
Issued (local time): 6 am Monday 15 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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