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Surf Forecasts:

Green Harbor surfForecast / Massachusetts / USA

information circle48hr Weather and Surf, issued 6 am Thursday 18 Dec 2025 EST
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
6.6° C
 (Which is 1.0°C colder than average for this time of year)

How big are the waves at Green Harbor today?

The current surf forecast for Green Harbor at 9AM is: 0.2m 10s primary swell from a East-southeast direction and 0.2m 3s secondary swell from a North direction (forecast issued at 06:00am December 18). The wind direction is predicted to be cross-onshore.

Time (EST) & DateWave HeightWave Period
Morning (18 Dec)0.5ft (0.2m)10s
Afternoon (18 Dec)0.5ft (0.2m)10s
Evening (18 Dec)2.5ft (0.8m)4s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table
Thursday
18
Friday
19
Saturday
20
Sun
21
4 AM7 AM10 AM1 PM4 PM7 PM10 PM1 AM4 AM7 AM10 AM1 PM4 PM7 PM10 PM1 AM4 AM7 AM10 AM1 PM4 PM7 PM10 PM1 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
See all maps
Wave Height (m) & direction (?)
0.2
ESE
0.2
ESE
0.2
ESE
0.2
E
0.2
E
0.6
SSE
0.9
SSE
0.9
SSE
0.9
SSE
1.2
SSE
1.8
SSE
2.5
SSE
1.6
ESE
1.3
ESE
1
E
0.9
ESE
0.9
ESE
0.9
E
0.8
E
0.7
E
0.6
E
0.5
E
0.5
E
0.5
E
Period(s) (?)99101010445656791010111112121111101010
Wave
Graph
(?)Metric surfscale
Energy kJ (?)999881028385378222038630722119420522017412585535145
Wind
(km/h)
10
W
10
WSW
10
S
20
S
20
S
20
S
25
S
30
S
30
S
40
S
65
S
65
S
25
SSW
35
WSW
45
W
40
WSW
40
W
35
WNW
30
WNW
20
W
10
SW
15
SSW
25
SSW
35
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		oncross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		oncross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		ononcross-
on		on
High Tide
/ height (m)
10:02AM
2.78
10:39PM
2.39
10:41AM
2.79
11:17PM
2.39
11:18AM
2.80
11:54PM
2.40
Low Tide
/ height (m)
3:44AM
0.53
4:24PM
0.20
4:25AM
0.53
5:03PM
0.18
5:03AM
0.52
5:41PM
0.16
Thursday
18
Friday
19
Saturday
20
Sun
21
Sunrise--7:05-------7:05-------7:05-----
Sunset----4:12-------4:12-------4:13---
clear
clear
clear
clear
clear
clear
part cloud
cloud
cloud
light rain
light rain
light rain
rain showers
light rain
snow showers
clear
part cloud
clear
clear
clear
part cloud
cloud
cloud
cloud
Rain (mm)
---------154111----------
Temp. °C43345681112131414106100-2-123224
Feels °C (?)0-1-1-2-112566224-3-10-11-11-11-10-5-2-4-5-4
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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