Green Harbor surfForecast / Massachusetts / USA

information circle48hr Weather and Surf, issued 1 am Thursday 30 Apr 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
8.2° C
(Which is slightly warmer than usual)

How big are the waves at Green Harbor today?

The current surf forecast for Green Harbor at 9AM is: 1.4m 10s primary swell from a East direction and 0.1m 12s secondary swell from a Southeast direction (forecast issued at 01:00am April 30). The wind direction is predicted to be cross-offshore.

Time (EDT) & DateWave HeightWave Period
Morning (30 Apr)4.5ft (1.4m)10s
Afternoon (30 Apr)4.5ft (1.4m)10s
Evening (30 Apr)4.5ft (1.3m)10s

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 4mm), mostly falling on Thu afternoon. Very mild (max 13°C on Fri afternoon, min 7°C on Thu night). Wind will be generally light.

Thursday
30
Friday
1
Saturday
2
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)
2
1
2
1
1
1
1
0
0
0
0
0
1
1
0
1
1
1
1
1
0
0
0
0
Swell
Height Map
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
Wave
Height (m)
Direction
Period (s)
1.5
E
10
1.5
E
10
1.4
E
10
1.4
E
10
1.4
E
10
1.3
E
10
1.3
E
10
1.2
E
10
1.2
E
10
1.2
E
10
1.1
E
9
1
E
9
1
E
9
1
E
9
1
E
9
0.9
E
9
0.9
E
9
0.9
E
9
0.9
E
9
0.9
E
9
0.8
E
8
0.8
E
8
0.8
E
9
0.8
E
9
Wave Graph
Metric surfscale
Energy kJ
458
467
400
384
377
326
319
268
262
257
211
168
164
160
157
125
122
122
122
119
92
92
99
101
Wind (km/h)
5
SE
5
WNW
10
N
5
N
5
NE
0
NE
5
NW
10
W
10
WNW
15
WNW
20
NW
15
NW
10
NNW
5
ESE
5
SSW
5
NNE
5
E
0
SSE
15
NNW
10
NNE
5
N
5
SE
10
SSE
10
SSW
glassy
cross-on
cross-off
cross-off
glassy
glassy
glassy
cross-on
cross-on
cross
cross
cross
cross-off
glassy
on
glassy
cross-off
glassy
cross-off
cross-off
cross-off
cross
cross
cross-on
High Tide
11:04PM2.99m
11:32AM2.76m
11:43PM2.98m
12:13PM2.70m
00:20AM2.96m
12:51PM2.64m
Low Tide
5:17AM0.08m
5:27PM0.29m
5:58AM0.07m
6:05PM0.35m
6:36AM0.09m
6:42PM0.42m
cloud
cloud
cloud
cloud
light rain
cloud
part cloud
cloud
clear
clear
clear
clear
part cloud
cloud
part cloud
clear
clear
part cloud
cloud
cloud
light rain
light rain
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:39
5:39
5:37
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:39
7:40
7:42
2
1
1
Temp °C
8
8
8
9
9
10
10
10
9
7
8
11
13
13
13
12
11
10
9
8
8
8
8
9
7
6
6
7
8
9
9
8
7
3
3
6
9
11
10
9
8
8
5
5
6
6
5
6
Swell 1
Height (m)
Direction
Period (s)
1.5
E
10
1.5
E
10
1.4
E
10
1.4
E
10
1.4
E
10
1.3
E
10
1.3
E
10
1.2
E
10
1.2
E
10
1.2
E
10
1.1
E
9
1
E
9
1
E
9
1
E
9
1
E
9
0.9
E
9
0.9
E
9
0.9
E
9
0.9
E
9
0.9
E
9
0.8
E
8
0.8
E
8
0.8
E
9
0.8
E
9
Energy kJ
458
467
400
384
377
326
319
268
262
257
211
168
164
160
157
125
122
122
122
119
92
92
99
101
Swell 2
Height (m)
Direction
Period (s)
0.1
SE
12
0.1
SE
12
0.1
SE
12
0.1
SE
12
0.1
SE
12
0.1
SE
12
0.1
SE
12
0.1
S
12
0.1
S
12
0.1
S
12
0.1
S
12
0.2
NNW
3
0.2
N
3
0.4
SW
4
0.2
SSW
4
0.4
SW
4
0.3
SW
5
0.2
SSW
5
0.2
N
3
0.2
N
3
0.2
N
3
Energy kJ
6
6
5
6
6
6
6
3
3
3
3
1
1
7
2
5
4
2
1
1
1
Swell 3
Height (m)
Direction
Period (s)
0.1
S
12
0.1
SW
4
0.1
SW
4
0.1
S
6
0.1
S
6
Energy kJ
3
1
1
1
1
Wind waves
Height (m)
Direction
Period (s)
0.3
NW
2
0.3
NNW
3
0.4
SW
4
0.2
SSW
4
0.1
SW
4
0.3
NNW
2
0.2
SSW
4
0.3
S
2
Energy kJ
1
1
4
2
1
1
2
1
Nearest Offshore or Glassy
Rating
(10 max)
2
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
0
1
0
0
0
0
0
1
1
1
49
32
0
0
1
0
0
0
0
0
6
6
2
1
Best forecast wave conditions in Massachusetts
Rating
(10 max)
3
3
3
3
3
3
2
2
2
2
2
1
1
1
1
1
1
1
1
2
1
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
3
3
3
3
3
3
3
3
2
2
2
2
2
2
2
2
1
1
1
3
1
1
1
2
Header Global
Rating
(10 max)
5
5
5
5
6
6
6
7
7
7
6
5
5
9
9
5
5
5
4
4
4
4
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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