Green Harbor surfForecast / Massachusetts / USA

information circle48hr Weather and Surf, issued 1 am Sunday 17 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
10.2° C
(Which is slightly warmer than usual)

How big are the waves at Green Harbor today?

The current surf forecast for Green Harbor at 7AM is: 0.5m 8s primary swell from a East direction and 0.4m 8s secondary swell from a East direction, 0.2m 3s secondary swell from a West-southwest direction (forecast issued at 01:00am May 17). The wind direction is predicted to be onshore.

Time (EDT) & DateWave HeightWave Period
Morning (17 May)1.5ft (0.4m)8s
Afternoon (17 May)1ft (0.3m)8s
Evening (17 May)2.5ft (0.7m)5s

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 7mm), mostly falling on Mon night. Warm (max 32°C on Tue afternoon, min 14°C on Mon morning). Wind will be generally light.

Sunday
17
Monday
18
Tuesday
19
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
0
0
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)
0.5
E
8
0.5
E
8
0.4
E
8
0.4
E
8
0.3
ESE
8
0.4
ESE
8
0.7
SSW
5
0.3
ESE
8
0.2
ESE
8
0.2
ESE
8
0.4
NE
4
0.4
NE
4
0.4
NE
4
0.4
NE
4
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
10
0.2
ESE
10
0.2
ESE
10
0.7
S
3
0.6
SSW
4
0.2
ESE
10
Wave Graph
Metric surfscale
Energy kJ
35
35
22
21
13
25
19
12
6
6
6
6
6
6
8
8
8
8
9
9
9
11
10
9
Wind (km/h)
25
SW
20
SW
15
WSW
15
W
15
W
15
NW
10
W
15
N
15
ENE
15
ENE
15
E
15
ESE
20
E
20
SSE
15
SSE
15
SSW
15
SSW
15
SSW
20
SW
20
SW
20
SW
25
SSW
25
SW
25
SW
on
on
on
cross-on
cross-on
cross
cross-on
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross
cross-on
cross-on
on
on
on
on
on
on
on
on
High Tide
11:45PM3.42m
12:24PM2.95m
00:35AM3.51m
1:15PM2.96m
1:27AM3.53m
2:08PM2.95m
Low Tide
6:11AM-0.37m
6:20PM0.04m
7:02AM-0.43m
7:11PM0.02m
7:54AM-0.42m
8:04PM0.03m
part cloud
light rain
clear
clear
clear
clear
clear
cloud
clear
part cloud
clear
clear
clear
clear
clear
rain showers
rain showers
rain showers
part cloud
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:20
5:18
5:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:58
7:59
8:00
1
1
5
1
Temp °C
15
15
18
24
28
28
25
22
17
15
14
15
17
18
15
16
16
17
19
28
32
30
23
21
10
12
17
22
25
25
24
20
14
11
10
11
12
14
12
14
14
16
18
27
29
27
20
18
Swell 1
Height (m)
Direction
Period (s)
0.5
E
8
0.5
E
8
0.4
E
8
0.4
E
8
0.3
ESE
8
0.3
ESE
8
0.3
E
8
0.3
ESE
8
0.2
ESE
8
0.2
ESE
8
0.4
NE
4
0.4
NE
4
0.4
NE
4
0.4
NE
4
0.3
NE
4
0.4
SE
4
0.2
ESE
4
0.2
ESE
4
0.2
ESE
4
0.2
ESE
10
0.2
ESE
10
0.2
ESE
10
0.2
E
10
0.2
ESE
10
Energy kJ
35
35
22
21
13
13
11
12
6
6
3
4
4
4
3
3
1
1
1
9
9
9
7
9
Swell 2
Height (m)
Direction
Period (s)
0.1
SE
5
0.2
ESE
8
0.4
E
8
0.3
S
6
0.3
E
8
0.4
ESE
8
0.2
NNW
3
0.2
NNW
3
0.3
S
7
0.3
S
7
0.2
ESE
8
0.2
ESE
8
0.2
ESE
8
0.2
ESE
8
0.2
ESE
9
0.1
NE
4
0.2
ESE
9
0.2
ESE
9
0.2
ESE
10
0.1
SE
4
0.1
E
13
0.1
E
16
0.1
E
16
0.1
E
16
Energy kJ
1
7
21
7
12
25
1
1
10
9
6
6
6
6
8
1
8
8
9
1
3
5
5
5
Swell 3
Height (m)
Direction
Period (s)
0.2
ENE
8
0.3
E
8
0.1
S
8
0.1
S
8
0.1
SE
5
0.2
NNW
3
0.2
S
7
0.2
S
7
0.2
S
7
0.1
E
13
0.2
ESE
9
0.1
NE
4
0.1
NE
4
0.1
E
13
0.1
E
13
Energy kJ
7
12
1
1
1
1
4
4
4
3
8
1
1
3
3
Wind waves
Height (m)
Direction
Period (s)
0.6
SSW
3
0.4
SW
3
0.2
WSW
3
0.7
SSW
5
0.3
NNE
3
0.4
NE
3
0.3
ESE
3
0.3
ESE
3
0.3
ESE
3
0.4
SE
3
0.4
SE
3
0.2
SSW
2
0.2
SSW
2
0.3
SW
2
0.4
SSW
3
0.7
S
3
0.6
SSW
4
0.6
SSW
3
Energy kJ
8
3
1
19
1
3
2
2
2
2
4
1
1
1
2
11
10
8
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)
6
81
2
57
54
95
57
72
72
83
272
276
515
515
515
515
525
131
131
337
1225
131
81
333
Best forecast wave conditions in Massachusetts
Rating
(10 max)
1
1
1
1
1
1
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
4
2
4
4
2
1
4
4
7
4
4
4
1
1
2
1
3
4
4
4
3
1
2
3
Header Global
Rating
(10 max)
5
4
4
8
6
4
4
5
7
4
4
5
4
5
5
4
4
4
4
5
5
5
4
4
  • 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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