Green Harbor surfForecast / Massachusetts / USA

information circle48hr Weather and Surf, issued 7 am Saturday 23 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
12.9° C
(Which is 2.2°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 11AM is: 0.1m 13s primary swell from a East direction and 0.1m 10s secondary swell from a East direction (forecast issued at 07:00am May 23). The wind direction is predicted to be cross-offshore.

Time (EDT) & DateWave HeightWave Period
Morning (23 May)0.5ft (0.1m)13s
Afternoon (23 May)0.5ft (0.1m)10s
Evening (23 May)0.5ft (0.1m)10s

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 30mm), heaviest during Sun night. Very mild (max 16°C on Mon night, min 7°C on Sun afternoon). Winds decreasing (fresh winds from the E on Sun afternoon, calm by Mon night).

Saturday
23
Sunday
24
Monday
25
Tue
26
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
2 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)
0.1
E
13
0.1
E
13
0.1
E
13
0.1
E
10
0.1
E
10
0.1
E
10
0.1
E
12
0.1
E
10
0.1
E
12
0.1
E
12
0.1
E
12
0.1
E
18
0.1
E
18
0.1
E
18
0.1
E
18
0.3
ESE
9
0.3
ESE
9
0.8
E
5
0.8
E
6
0.7
E
6
0.7
E
6
0.8
E
6
0.7
E
7
0.7
E
7
Wave Graph
Metric surfscale
Energy kJ
4
4
3
2
2
2
3
2
4
3
3
6
6
6
6
17
17
36
38
35
39
54
43
43
Wind (km/h)
5
NE
10
E
10
ESE
10
ESE
15
ESE
15
ESE
10
SE
15
ESE
15
ESE
20
SE
25
SE
30
ESE
30
E
30
E
25
ESE
15
E
10
NE
15
NNW
20
NNW
15
NW
5
NW
10
SE
10
SSW
5
WSW
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-off
cross-off
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross
cross-off
cross
cross-on
cross-on
High Tide
5:21AM3.09m
6:04PM2.85m
6:26AM2.94m
7:06PM2.88m
7:30AM2.83m
8:05PM2.91m
Low Tide
11:42AM-0.02m
00:08AM0.24m
12:42PM0.09m
1:13AM0.25m
1:40PM0.18m
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
light rain
light rain
mod rain
mod rain
mod rain
light rain
cloud
cloud
cloud
cloud
part cloud
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:15
5:13
5:13
5:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:02
8:04
8:05
8:06
2
5
7
8
7
1
Temp °C
15
15
15
15
15
14
12
12
11
11
8
7
9
10
10
12
12
11
11
11
14
16
16
15
12
11
11
11
11
10
8
8
7
6
2
1
3
4
5
10
11
8
8
9
13
15
15
15
Swell 1
Height (m)
Direction
Period (s)
0.2
ENE
4
0.2
ENE
4
0.1
E
10
0.1
E
10
0.1
E
10
0.1
E
10
0.1
E
10
0.1
E
10
0.1
SE
10
0.1
SE
9
0.1
E
9
0.1
E
9
0.1
E
18
0.1
E
18
0.3
ESE
9
0.3
ESE
9
0.8
E
5
0.8
E
6
0.7
E
6
0.7
E
6
0.8
E
6
0.7
E
7
0.7
E
7
Energy kJ
1
1
2
2
2
2
2
2
4
3
2
2
6
6
17
17
36
38
35
39
54
43
43
Swell 2
Height (m)
Direction
Period (s)
0.1
E
10
0.1
E
10
0.1
NE
4
0.1
E
12
0.1
E
12
0.1
E
18
0.1
S
9
0.4
ESE
9
0.4
ESE
9
0.4
ESE
9
0.4
ESE
8
0.3
ESE
8
0.3
ESE
8
0.3
ESE
8
Energy kJ
2
2
1
3
3
6
2
32
31
30
24
14
12
12
Swell 3
Height (m)
Direction
Period (s)
0.1
E
13
0.1
E
13
0.1
E
13
0.1
E
12
0.1
E
12
0.1
E
12
0.1
E
18
0.1
E
17
0.1
E
16
0.1
E
16
0.1
S
8
0.1
E
16
0.1
E
16
0.1
E
16
0.1
E
16
Energy kJ
4
4
3
3
3
3
6
6
5
5
1
5
5
5
5
Wind waves
Height (m)
Direction
Period (s)
0.2
ESE
2
0.4
SE
3
0.5
SE
4
0.6
ESE
4
0.8
ESE
5
0.9
ESE
5
1.3
ESE
5
1.4
ESE
6
1.2
ESE
6
1
E
6
0.3
NNE
3
Energy kJ
1
2
6
12
27
39
85
124
90
62
1
Nearest Offshore or Glassy
Rating
(10 max)
1
2
2
1
1
1
1
2
2
2
2
4
3
3
2
2
1
1
1
1
1
1
1
1
Distance (km)
208
794
794
775
124
106
106
718
718
718
504
395
395
276
83
73
49
9
32
1
9
2
2
2
Best forecast wave conditions in Massachusetts
Rating
(10 max)
2
2
1
1
1
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
2
2
2
2
1
2
2
3
3
3
3
4
3
3
3
2
3
2
2
2
2
4
4
5
Header Global
Rating
(10 max)
7
8
7
6
5
5
5
5
5
5
5
5
5
5
4
5
5
5
4
5
4
5
5
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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