Green Harbor surfForecast / Massachusetts / USA

information circle48hr Weather and Surf, issued 1 am Monday 25 May 2026 EDT
Forecast update in hr  min  s Forecast update imminent
Green Harbor surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Green Harbor sea temperature is
12.4° C
(Which is 1.3°C warmer than normal for this time of year)

How big are the waves at Green Harbor today?

The current surf forecast for Green Harbor at 9AM is: 0.9m 7s primary swell from a East direction and 0.1m 16s secondary swell from a East direction, 0.4m 4s secondary swell from a South direction (forecast issued at 01:00am May 25). The wind direction is predicted to be glassy.

Time (EDT) & DateWave HeightWave Period
Morning (25 May)3ft (0.9m)7s
Afternoon (25 May)2.5ft (0.8m)8s
Evening (25 May)2.5ft (0.7m)8s

Table - waves today at Green Harbor. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Light rain (total 8mm), mostly falling on Wed night. Warm (max 27°C on Wed afternoon, min 13°C on Mon afternoon). Wind will be generally light.

Monday
25
Tuesday
26
Wednesday
27
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
Rating
(10 max)
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
1.2
ESE
7
1.1
E
7
1
E
7
0.9
E
7
0.8
E
8
0.7
E
8
0.7
E
8
0.7
E
8
0.7
E
8
0.7
E
8
0.6
E
8
0.6
E
9
0.5
E
8
0.5
E
8
0.4
ESE
8
0.4
ESE
8
0.3
ESE
8
0.3
ESE
7
0.2
ESE
7
0.2
ESE
7
0.2
ESE
7
0.4
SSW
4
0.1
E
14
0.1
E
14
Wave Graph
Metric surfscale
Energy kJ
135
131
103
83
82
64
64
64
63
66
52
55
36
33
21
20
11
10
5
5
4
6
4
4
Wind (km/h)
10
SE
0
SSW
5
NW
10
W
10
W
10
WNW
10
SW
10
WSW
10
NNW
10
NNW
10
N
5
E
10
S
20
SSW
20
SSW
20
SW
20
SW
15
SW
15
WSW
15
W
10
WNW
10
SSE
20
W
5
W
cross
glassy
glassy
cross-on
cross-on
cross
on
on
cross-off
cross-off
cross-off
cross-off
cross-on
on
on
on
on
on
on
cross-on
cross
cross
cross-on
glassy
High Tide
7:30AM2.83m
8:05PM2.91m
8:33AM2.74m
9:00PM2.94m
9:31AM2.68m
9:49PM2.96m
Low Tide
1:13AM0.25m
1:40PM0.18m
2:16AM0.23m
2:35PM0.26m
3:15AM0.20m
3:27PM0.33m
light rain
light rain
light rain
light rain
light rain
part cloud
clear
clear
part cloud
part cloud
clear
part cloud
clear
clear
clear
clear
clear
clear
cloud
cloud
cloud
cloud
light rain
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:13
5:11
5:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:05
8:06
8:07
1
1
1
1
2
3
1
Temp °C
12
14
14
14
13
17
19
19
17
15
15
18
20
21
18
17
16
16
18
25
27
24
20
19
11
15
15
13
12
17
19
19
16
14
14
18
18
18
15
14
13
13
15
23
27
24
18
20
Swell 1
Height (m)
Direction
Period (s)
1.2
ESE
7
1.1
E
7
1
E
7
0.9
E
7
0.8
E
8
0.7
E
8
0.7
E
8
0.7
E
8
0.7
E
8
0.7
E
8
0.6
E
8
0.6
E
9
0.5
E
8
0.5
E
8
0.4
ESE
8
0.4
ESE
8
0.3
ESE
8
0.3
ESE
7
0.2
ESE
7
0.2
ESE
7
0.2
ESE
7
0.2
ESE
7
0.2
ESE
6
0.1
SE
6
Energy kJ
135
131
103
83
82
64
64
64
63
66
52
55
36
33
21
20
11
10
5
5
4
4
4
2
Swell 2
Height (m)
Direction
Period (s)
0.1
S
8
0.1
E
17
0.1
E
16
0.1
E
16
0.1
E
16
0.1
E
16
0.1
E
16
0.1
E
16
0.2
E
7
0.1
E
16
0.1
E
15
0.1
E
15
0.1
E
15
0.1
S
6
0.1
S
7
0.2
S
4
0.1
S
8
0.2
SSW
4
Energy kJ
1
6
5
5
5
5
5
5
4
5
4
4
4
1
1
1
1
2
Swell 3
Height (m)
Direction
Period (s)
0.1
E
17
0.1
E
16
0.1
S
8
0.1
S
8
0.1
E
16
0.1
E
16
0.1
E
16
0.1
E
16
0.1
E
15
0.1
E
15
0.1
S
7
0.1
E
15
0.1
S
7
0.1
S
6
0.1
S
6
0.1
E
14
0.1
E
14
Energy kJ
5
5
1
1
5
5
5
5
5
4
1
4
1
1
1
4
4
Wind waves
Height (m)
Direction
Period (s)
0.8
S
8
0.4
S
5
0.4
S
4
0.5
S
4
0.5
SSW
4
0.3
S
2
0.4
SSW
3
0.3
SW
3
0.4
SW
2
0.3
WSW
2
0.2
WSW
2
0.4
SSW
4
Energy kJ
92
7
6
8
11
1
3
1
2
1
1
6
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
72
0
0
1
1
1
1
2
9
9
15
85
6
6
102
54
57
87
87
87
124
396
127
72
Best forecast wave conditions in Massachusetts
Rating
(10 max)
1
2
2
2
2
2
1
1
1
1
1
1
1
1
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
2
2
2
2
2
2
4
7
2
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
Header Global
Rating
(10 max)
4
5
5
4
4
4
4
5
5
9
9
9
9
6
7
9
6
8
9
9
9
6
6
9
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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