Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
Green Harbor surfForecast / Massachusetts / USA
48hr Weather and Surf, issued 12 pm Monday 29 Dec 2025 ESTForecast 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
5.6° C
(Which is slightly cooler than normal)How big are the waves at Green Harbor today?
The current surf forecast for Green Harbor at 4PM is: 0.2m 10s primary swell from a East-northeast direction and 0.3m 5s secondary swell from a Southeast direction, 0.4m 3s secondary swell from a South-southwest direction (forecast issued at 12:00pm December 29). The wind direction is predicted to be onshore.
| Time (EST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (29 Dec) | 2.5ft (0.7m) | 4s |
| Afternoon (29 Dec) | 0.5ft (0.2m) | 10s |
| Evening (29 Dec) | 3ft (0.9m) | 4s |
Table - waves today at Green Harbor. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 29 | Tuesday 30 | Wednesday 31 | Thursday 01 | |||||||||||||||||||||
| 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 4 | 10 | 10 | 3 | 4 | 4 | 4 | 4 | 4 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 15 | 11 | 13 | 13 | 4 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 12 | 11 | 10 | 10 | 23 | 35 | 45 | 46 | 50 | 54 | 50 | 50 | 38 | 46 | 28 | 19 | 9 | 5 | 5 | 5 | 13 | 17 | 16 | 30 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | on | on | on | on | on | on | cross- on |
High Tide / height (m) | 6:32PM 2.59 | 6:56AM 3.02 | 7:34PM 2.60 | 7:53AM 3.15 | 8:33PM 2.63 | |||||||||||||||||||
Low Tide / height (m) | 12:21PM 0.10 | 12:36AM 0.21 | 1:21PM -0.03 | 1:32AM 0.19 | 2:20PM -0.16 | 2:28AM 0.17 | ||||||||||||||||||
Monday 29 | Tuesday 30 | Wednesday 31 | Thursday 01 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | - | 7:09 | - | - | - | - | - | - | - | 7:09 | - | - | - | - | - | - | - |
| Sunset | - | - | 4:17 | - | - | - | - | - | - | - | 4:19 | - | - | - | - | - | - | - | 4:20 | - | - | - | - | - |
 | |  |  |  |  | |  |  | |  | | | | | | | | | | | | | | |
Rain (mm) | 1 | 1 | 6 | 3 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 8 | 9 | 8 | 6 | 1 | -2 | -3 | -4 | -3 | -3 | -3 | -4 | -4 | -3 | -3 | -3 | -2 | 0 | 0 | -1 | -1 | -1 | -1 | -1 |
| Feels °C (?) | 4 | 4 | 4 | -1 | -9 | -13 | -14 | -15 | -14 | -14 | -13 | -15 | -14 | -13 | -12 | -12 | -10 | -8 | -8 | -8 | -9 | -8 | -7 | -10 |
- 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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