Green Harbor surfForecast / Massachusetts / USA

information circle48hr Weather and Surf, issued 1 pm 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 9PM is: 1.3m 10s primary swell from a East direction and 0.1m 12s secondary swell from a Southeast direction (forecast issued at 01:00pm April 30). The wind direction is predicted to be glassy.

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

Moderate rain (total 16mm), heaviest on Sat night. Very mild (max 13°C on Fri afternoon, min 7°C on Thu night). Winds increasing (calm on Thu afternoon, fresh winds from the NNW by Sun morning).

Thu
30
Friday
1
Saturday
2
Sun
3
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
1
1
1
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
0
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>
<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)
1.4
E
10
1.4
E
10
1.3
E
10
1.3
E
10
1.3
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
0.8
E
9
0.8
E
9
0.8
E
9
0.8
E
9
0.8
E
9
0.8
E
9
0.9
E
9
0.8
E
9
0.8
E
9
Wave Graph
Metric surfscale
Energy kJ
384
377
326
319
319
267
257
211
168
164
157
157
125
122
122
94
94
96
99
99
101
127
99
94
Wind (km/h)
10
NW
5
NW
5
NNW
5
NNW
10
WNW
10
W
15
NW
15
NW
15
NNW
5
NE
15
ESE
15
SSE
10
SW
15
SW
10
SW
10
SW
10
SSW
15
SSW
20
SSW
15
SSW
10
S
5
SE
5
NNE
20
NNW
cross
glassy
glassy
cross-off
cross
cross-on
cross
cross
cross-off
off
cross-off
cross-on
on
on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross
cross-off
cross-off
High Tide
11:32AM2.76m
11:43PM2.98m
12:13PM2.70m
00:20AM2.96m
12:51PM2.64m
00:55AM2.92m
Low Tide
5:27PM0.29m
5:58AM0.07m
6:05PM0.35m
6:36AM0.09m
6:42PM0.42m
7:14AM0.12m
cloud
cloud
cloud
cloud
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
cloud
light rain
light rain
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:39
5:37
5:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:39
7:40
7:42
7:43
3
5
5
Temp °C
9
10
10
10
10
8
7
8
11
13
13
13
12
11
10
10
12
13
12
10
8
8
8
7
7
9
9
8
8
5
3
3
6
10
9
9
8
7
6
7
9
9
7
6
5
6
6
2
Swell 1
Height (m)
Direction
Period (s)
1.4
E
10
1.4
E
10
1.3
E
10
1.3
E
10
1.3
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
0.8
E
9
0.8
E
9
0.8
E
9
0.8
E
9
0.8
E
9
0.8
E
9
0.9
E
9
0.8
E
9
0.8
E
9
Energy kJ
384
377
326
319
319
267
257
211
168
164
157
157
125
122
122
94
94
96
99
99
101
127
99
94
Swell 2
Height (m)
Direction
Period (s)
0.1
SE
12
0.1
S
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
0.1
S
12
0.3
NNW
3
0.2
NNW
3
0.1
SW
4
0.2
S
3
Energy kJ
6
3
6
6
3
3
3
3
3
2
1
1
1
Swell 3
Height (m)
Direction
Period (s)
0.1
S
12
0.1
S
12
Energy kJ
3
3
Wind waves
Height (m)
Direction
Period (s)
0.3
NW
2
0.2
NNW
3
0.2
N
3
0.3
SE
2
0.4
SW
4
0.4
SW
4
0.2
SSW
2
0.1
SW
4
0.3
SSW
4
0.4
SSW
2
0.5
S
3
0.3
S
3
0.4
S
4
Energy kJ
1
1
1
1
4
4
1
1
3
2
4
1
4
Nearest Offshore or Glassy
Rating
(10 max)
2
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)
1
0
0
0
1
1
1
32
0
0
0
2
1
1
1
1
1
6
15
6
1
6
49
55
Best forecast wave conditions in Massachusetts
Rating
(10 max)
3
3
3
3
2
2
2
1
1
1
1
1
1
1
2
1
2
1
1
1
1
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
3
3
3
3
3
2
2
2
2
2
2
1
1
2
3
1
3
3
1
1
1
3
4
4
Header Global
Rating
(10 max)
5
6
6
6
7
7
5
6
5
5
5
9
7
5
5
4
4
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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