Green Harbor surfForecast / Massachusetts / USA

information circle48hr Weather and Surf, issued 1 pm Saturday 16 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
10.5° C
(Which is slightly warmer than usual)

How big are the waves at Green Harbor today?

The current surf forecast for Green Harbor at 9PM is: 0.6m 9s primary swell from a East direction and 0.6m 3s secondary swell from a South-southwest direction (forecast issued at 01:00pm May 16). The wind direction is predicted to be onshore.

Time (EDT) & DateWave HeightWave Period
Morning (16 May)3.5ft (1.0m)9s
Afternoon (16 May)2.5ft (0.8m)9s
Evening (16 May)2ft (0.6m)9s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 28°C on Sun afternoon, min 14°C on Mon morning). Winds decreasing (fresh winds from the SW on Sat night, light winds from the W by Sun afternoon).

Sat
16
Sunday
17
Monday
18
Tue
19
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
2 AM
5 AM
8 AM
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
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.9
ENE
9
0.8
ENE
9
0.7
E
9
0.7
E
9
0.6
E
9
0.5
E
8
0.5
E
8
0.4
E
8
0.4
ESE
8
0.3
E
8
0.3
ESE
8
0.4
SE
8
0.3
ESE
8
0.2
ESE
8
0.2
ESE
8
0.2
ESE
8
0.2
ESE
8
0.2
ESE
8
0.2
ESE
8
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
10
Wave Graph
Metric surfscale
Energy kJ
141
110
79
78
55
35
35
22
22
12
13
16
12
6
6
6
6
6
6
8
8
8
8
9
Wind (km/h)
15
SW
15
SW
25
SSW
25
SW
30
SW
30
SW
20
SW
15
WSW
15
W
10
W
10
NNW
15
WNW
15
NNE
10
ENE
10
E
15
E
10
E
15
ESE
20
SE
15
SSE
15
S
15
SW
15
SSW
15
SW
on
on
on
on
on
on
on
cross-on
cross-on
cross-on
cross-off
cross-on
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross-on
on
on
on
High Tide
11:34AM2.91m
11:45PM3.42m
12:24PM2.95m
00:35AM3.51m
1:15PM2.96m
1:27AM3.53m
Low Tide
5:30PM0.09m
6:11AM-0.37m
6:20PM0.04m
7:02AM-0.43m
7:11PM0.02m
7:54AM-0.42m
clear
clear
clear
clear
clear
part cloud
cloud
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
cloud
part cloud
clear
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>
7:57
7:58
7:59
8:00
Temp °C
18
23
22
18
15
16
15
18
23
28
27
26
22
17
15
14
14
15
17
15
14
16
17
19
15
19
17
13
9
10
11
16
22
27
25
23
19
14
12
10
10
11
12
11
12
14
16
18
Swell 1
Height (m)
Direction
Period (s)
0.9
ENE
9
0.8
ENE
9
0.7
E
9
0.7
E
9
0.6
E
9
0.5
E
8
0.5
E
8
0.4
E
8
0.4
ESE
8
0.3
E
8
0.3
ESE
8
0.3
ESE
8
0.3
ESE
8
0.2
ESE
8
0.2
ESE
8
0.2
ESE
8
0.2
NNE
4
0.2
NNE
4
0.2
NNE
4
0.2
ESE
9
0.2
ESE
3
0.2
ESE
4
0.2
SSE
3
0.2
ESE
10
Energy kJ
141
110
79
78
55
35
35
22
22
11
13
12
12
6
6
6
1
1
1
8
1
1
1
9
Swell 2
Height (m)
Direction
Period (s)
0.2
S
9
0.1
S
6
0.2
ESE
8
0.4
E
8
0.4
SSW
6
0.2
ESE
8
0.3
S
4
0.4
SE
8
0.3
S
7
0.3
S
7
0.3
NNE
4
0.2
ESE
8
0.2
ESE
8
0.2
ESE
8
0.1
NE
4
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.1
E
13
Energy kJ
6
1
7
22
13
7
4
16
10
9
3
6
6
6
1
8
8
8
3
Swell 3
Height (m)
Direction
Period (s)
0.3
E
8
0.3
E
8
0.2
S
6
0.1
S
8
0.1
S
8
0.2
N
3
0.2
S
7
0.2
S
7
0.2
S
7
0.1
E
13
0.1
NE
4
Energy kJ
12
12
3
1
1
1
4
4
4
3
1
Wind waves
Height (m)
Direction
Period (s)
0.4
SSW
3
0.6
S
3
0.6
SSW
3
0.7
SSW
3
0.6
SW
3
0.5
SW
3
0.2
WSW
3
0.4
NE
2
0.4
ENE
3
0.4
ENE
3
0.3
ESE
4
0.3
ESE
3
0.4
SE
3
0.4
SE
3
0.3
SSW
2
0.3
SW
2
0.3
SSW
2
Energy kJ
2
8
9
10
9
6
1
2
4
5
2
2
2
3
1
1
1
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)
2
2
6
959
543
85
81
43
57
57
94
98
72
72
85
275
276
515
106
106
515
151
106
95
Best forecast wave conditions in Massachusetts
Rating
(10 max)
2
2
1
1
1
1
1
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
4
2
2
3
3
4
4
4
4
4
2
4
2
4
3
4
4
1
1
2
2
3
4
4
Header Global
Rating
(10 max)
5
6
5
4
4
4
6
9
9
7
4
4
5
7
5
4
5
4
4
4
4
5
5
5
  • 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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