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Surf Forecasts:

Green Harbor surfForecast / Massachusetts / USA

information circle48hr Weather and Surf, issued 7 pm Tuesday 17 Mar 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
3.0° C
 (Which is slightly cooler than normal)

How big are the waves at Green Harbor today?

The current surf forecast for Green Harbor at 12AM is: 0.9m 11s primary swell from a East direction and 1.0m 5s secondary swell from a Northwest direction (forecast issued at 07:00pm March 17). An open ocean swell of 0.4m 11s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (EDT) & DateWave HeightWave Period
Morning (18 Mar)--
Afternoon (18 Mar)3.5ft (1.1m)11s
Evening (18 Mar)3.5ft (1.0m)11s

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

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 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
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.1
E
1
E
0.9
E
0.8
E
0.8
E
0.7
E
0.7
E
0.6
E
0.6
E
0.6
E
0.6
E
0.6
E
0.6
E
0.6
E
0.5
E
0.5
E
0.5
E
0.4
ESE
0.4
ESE
0.4
ESE
0.4
ESE
0.4
ESE
0.4
ESE
0.5
E
Period(s) (?)111111111110101010101010999999999999
Wave
Graph
(?)Metric surfscale
Energy kJ (?)2892481981511431041007371706765636143424126262525252637
Wind
(km/h)
25
WNW
35
WNW
30
WNW
25
WNW
25
WNW
20
WNW
20
WNW
10
NNW
10
ESE
15
S
10
S
10
S
5
SSE
10
SE
15
SE
20
SE
20
S
20
S
15
SSW
15
SW
15
SW
15
SW
10
WSW
15
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		crosscrosscross-
on		cross-
on		cross-
on		crosscross-
off		cross-
off		cross-
on		cross-
on		cross-
on		crosscrosscrosscrosscross-
on		cross-
on		ononononcross-
on		cross-
on
High Tide
/ height (m)
11:23PM
2.72
11:40AM
2.93
12:02AM
2.89
12:23PM
2.99
12:42AM
3.05
1:06PM
3.02
Low Tide
/ height (m)
5:11PM
0.13
5:26AM
0.13
5:51PM
0.04
6:10AM
-0.03
6:31PM
-0.02
6:54AM
-0.17
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Sunrise-----6:50-------6:48-------6:46--
Sunset6:50-------6:52-------6:52-------
cloud
clear
clear
clear
clear
clear
cloud
cloud
cloud
clear
clear
clear
part cloud
cloud
part cloud
part cloud
cloud
cloud
cloud
part cloud
part cloud
part cloud
clear
clear
Rain (mm)
------------------------
Temp. °C51-2-3-4-4-3-1-1-1-1-1-101331000158
Feels °C (?)-3-9-11-12-12-11-11-6-7-8-6-6-5-5-5-4-4-5-6-6-6-513
  • 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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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.

View detailed surf forecast for Green Harbor at:
surf-forecast.com

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