Green Harbor Surf Break

Lat Long: 42.08° N 70.64° W

Green Harbor 48 hour detailed Surf Forecast

Issued: 7 am 20 Aug 2026 (local time)

Forecast update in  hr  min

Today's Green Harbor sea temperature is
19.2° C
1.3° 

Green Harbor surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Green Harbor today (20 Aug):

  • Morning surf: Morning surf (20 Aug, local time) - 1ft (0.3m), 8s period with ESE swell.
  • Afternoon surf: Afternoon surf (20 Aug, local time) - 1ft (0.3m), 8s period with E swell.
  • Evening surf: Evening surf (20 Aug, local time) - 1.5ft (0.4m), 8s period with E swell.

The current surf forecast for Green Harbor at 11AM is: 0.3m 8s primary swell from a East-southeast direction (forecast issued at 07:00am August 20). An open ocean swell of 0.1m 6s is not directed at the surf break. The wind direction is predicted to be glassy.

Time (EDT) & DateWave HeightWave Period
Morning (20 Aug)1ft (0.3m)8s
Afternoon (20 Aug)1ft (0.3m)8s
Evening (20 Aug)1.5ft (0.4m)8s

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


Short Range Forecast

Moderate rain (total 17mm), heaviest on Sat night. Warm (max 27°C on Thu afternoon, min 18°C on Thu night). Wind will be generally light.

Thursday
20
Friday
21
Saturday
22
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)
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 Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.2
E
8
0.3
ESE
8
0.3
ESE
8
0.3
ESE
8
0.3
E
7
0.3
E
8
0.4
E
8
0.3
E
7
0.3
E
7
0.3
E
7
0.4
E
8
0.4
E
8
0.4
E
8
0.4
E
8
0.4
E
8
0.4
E
8
0.4
E
8
0.3
E
8
0.3
E
8
0.9
ENE
5
0.9
ENE
5
0.8
ENE
5
0.6
E
5
Wave Graph
Metric surfscale
Energy kJ
5
13
12
11
10
10
19
9
8
9
23
22
22
21
21
20
20
11
10
37
50
31
19
Wind (km/h)
10
WSW
10
W
5
ENE
15
E
5
SE
15
N
25
NNW
20
N
10
NNE
10
NNW
20
NNE
20
NE
15
NE
15
E
10
E
10
ENE
15
NE
20
ENE
15
E
20
ENE
20
NE
20
NNE
15
NNW
Wind State
on
cross-on
glassy
cross-off
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
off
off
off
cross-off
cross-off
off
off
cross-off
cross-off
off
off
off
cross-off
High Tide
5:47AM2.45m
6:06PM2.72m
6:45AM2.33m
7:03PM2.65m
7:46AM2.28m
8:02PM2.64m
Low Tide
11:44AM0.52m
00:28AM0.39m
12:40PM0.62m
1:28AM0.45m
1:37PM0.67m
clear
clear
clear
part cloud
cloud
cloud
cloud
light rain
light rain
part cloud
clear
clear
part cloud
cloud
clear
clear
clear
part cloud
cloud
light rain
light rain
mod rain
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:54
5:56
5:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:36
7:34
7:32
 mm
1
2
2
5
6
Temp °C
22
22
26
27
27
25
21
18
18
19
20
20
20
20
20
20
19
19
20
18
18
19
19
Feels °C
23
22
27
26
28
24
17
15
18
18
18
17
19
19
19
20
18
18
19
16
17
18
19
  • 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
How to use the Wavefinder 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Green Harbor surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


Nearest locationNearest