Green Harbor surfForecast / Massachusetts / USA

information circle48hr Weather and Surf, issued 7 pm Sunday 24 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
12.5° C
(Which is 1.7°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 3AM is: 1.8m 7s primary swell from a Southeast direction and 1.3m 7s secondary swell from a East-southeast direction (forecast issued at 07:00pm May 24). An open ocean swell of 0.1m 8s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (EDT) & DateWave HeightWave Period
Morning (25 May)3.5ft (1.0m)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

Heavy rain (total 20mm), heaviest during Sun night. Warm (max 26°C on Wed afternoon, min 11°C on Sun night). Mainly fresh winds.

Sun
24
Monday
25
Tuesday
26
Wed
27
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
11 AM
2 PM
Rating
(10 max)
0
0
0
1
1
1
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)
0.1
E
18
0.1
E
18
1.5
ESE
6
1.8
SE
7
1.2
E
7
1
E
7
0.8
E
6
0.9
E
8
0.8
E
8
0.7
E
8
0.5
ESE
8
0.5
E
8
0.7
E
8
0.6
E
8
0.6
E
8
0.5
E
8
0.5
E
8
0.4
ESE
8
0.4
ESE
8
0.3
ESE
8
0.3
ESE
7
0.3
ESE
7
0.2
ESE
7
0.4
SSW
4
Wave Graph
Metric surfscale
Energy kJ
6
6
161
340
146
97
48
100
84
64
38
35
69
51
52
36
34
21
20
11
11
10
5
6
Wind (km/h)
30
E
30
ESE
25
SE
10
SSE
5
SSW
5
WNW
10
WSW
10
WNW
10
W
10
SW
10
WSW
10
NW
15
NNW
10
NNE
10
E
10
ESE
15
SSE
25
SSW
20
SW
20
SW
15
WSW
15
WSW
15
W
10
NW
cross-off
cross-off
cross-off
cross
glassy
glassy
cross-on
cross
cross-on
on
cross-on
cross
cross-off
cross-off
cross-off
cross-off
cross-on
on
on
on
on
cross-on
cross-on
cross
High Tide
7:06PM2.88m
7:30AM2.83m
8:05PM2.91m
8:33AM2.74m
9:00PM2.94m
9:31AM2.68m
Low Tide
1:13AM0.25m
1:40PM0.18m
2:16AM0.23m
2:35PM0.26m
3:15AM0.20m
light rain
mod rain
mod rain
light rain
light rain
light rain
light rain
light rain
cloud
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
cloud
cloud
<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>
8:04
8:05
8:06
8:07
5
6
6
1
1
2
2
2
Temp °C
10
11
11
13
14
14
14
13
16
18
18
17
14
14
15
20
22
19
17
17
17
20
24
26
4
5
7
12
14
14
13
12
16
18
18
16
12
13
14
19
19
16
14
14
15
18
23
25
Swell 1
Height (m)
Direction
Period (s)
0.1
E
18
0.1
E
13
1.4
ESE
7
1.2
E
7
1
E
7
0.8
E
6
0.9
E
8
0.8
E
8
0.7
E
8
0.5
ESE
8
0.5
E
8
0.7
E
8
0.6
E
8
0.6
E
8
0.5
E
8
0.5
E
8
0.4
ESE
8
0.4
ESE
8
0.3
ESE
8
0.3
ESE
7
0.3
ESE
7
0.2
ESE
7
0.2
ESE
7
Energy kJ
6
3
163
146
97
48
100
84
64
38
35
69
51
52
36
34
21
20
11
11
10
5
5
Swell 2
Height (m)
Direction
Period (s)
0.1
E
12
0.1
E
18
0.1
S
8
0.1
E
17
0.1
E
16
0.5
ESE
8
0.1
E
16
0.1
E
16
0.1
E
16
0.5
E
6
0.4
ENE
6
0.1
E
16
0.1
E
15
0.1
E
15
0.1
E
15
0.1
E
15
0.1
S
7
0.3
SSW
5
0.3
SSW
5
Energy kJ
3
6
1
6
5
38
5
5
5
20
11
5
4
4
4
4
1
4
4
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
15
0.1
E
15
0.1
SE
7
0.1
S
7
0.1
S
7
0.1
S
7
Energy kJ
5
5
1
1
5
5
5
5
4
2
1
1
1
Wind waves
Height (m)
Direction
Period (s)
1.1
ESE
5
1.4
ESE
6
1.5
ESE
6
1.8
SE
7
0.5
S
5
0.4
S
5
0.5
S
4
0.6
S
4
0.3
SSE
2
0.4
S
3
0.4
SW
3
0.4
SW
3
0.4
SW
2
0.2
WSW
2
0.4
SSW
4
Energy kJ
59
110
161
340
11
7
7
13
1
2
2
2
2
1
6
Nearest Offshore or Glassy
Rating
(10 max)
1
1
2
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
504
775
106
2
0
0
1
1
1
1
1
9
9
39
102
52
124
124
85
81
57
54
124
131
Best forecast wave conditions in Massachusetts
Rating
(10 max)
3
2
2
2
1
2
1
1
1
1
1
1
1
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
1
1
3
3
3
3
2
2
2
4
2
8
9
9
9
9
3
3
1
4
4
4
2
1
Header Global
Rating
(10 max)
5
5
4
4
4
4
4
4
4
4
5
8
9
9
9
9
5
6
6
7
7
7
6
7
  • 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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