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Green Harbor Surf Forecast
/ Massachusetts (29 breaks) / Massachusetts (28 breaks) /
Surf Forecasts:
Green Harbor surfForecast / Massachusetts / USA
48hr Weather and Surf, issued 1 am Tuesday 12 May 2026 EDTForecast 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
9.4° C
(Which is slightly warmer than usual)How big are the waves at Green Harbor today?
The current surf forecast for Green Harbor at 5AM is: 0.7m 8s primary swell from a East direction and 0.1m 15s secondary swell from a East direction (forecast issued at 01:00am May 12). An open ocean swell of 0.5m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 May) | 2.5ft (0.7m) | 8s |
| Afternoon (12 May) | 1.5ft (0.5m) | 8s |
| Evening (12 May) | 1.5ft (0.4m) | 7s |
Table - waves today at Green Harbor. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 5mm), mostly falling on Thu afternoon. Very mild (max 15°C on Wed afternoon, min 8°C on Tue morning). Winds decreasing (fresh winds from the SSW on Wed afternoon, calm by Thu night). | ||||||||||||||||||||||||
Tuesday 12 | Wednesday 13 | Thursday 14 | ||||||||||||||||||||||
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 | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
E 8 | E 8 | E 8 | E 8 | E 8 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 10 | S 4 | S 4 | S 4 | SSE 4 | SSE 5 | E 10 | E 6 | ESE 6 | E 6 | E 6 | E 6 | |
69 | 66 | 63 | 44 | 28 | 27 | 25 | 15 | 15 | 8 | 9 | 10 | 8 | 13 | 13 | 13 | 10 | 18 | 8 | 12 | 37 | 36 | 37 | 51 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | cross-off | glassy | |
High Tide | 8:05AM2.64m | 8:34PM2.73m | 9:00AM2.70m | 9:22PM2.92m | 9:53AM2.77m | 10:09PM3.11m | ||||||||||||||||||
Low Tide | 1:52AM0.47m | 2:18PM0.34m | 2:47AM0.30m | 3:07PM0.29m | 3:39AM0.10m | 3:54PM0.22m | ||||||||||||||||||
 | |  |  |  | | |  | | | | | | |  | | | | | |  | | | | |
 | — | 5:24 | — | — | — | — | — | — | — | 5:24 | — | — | — | — | — | — | — | 5:22 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:52 | — | — | — | — | — | — | — | 7:53 | — | — | — | — | — | — | — | 7:54 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 2 | — | — | |
Temp °C | 10 | 8 | 8 | 10 | 11 | 13 | 12 | 12 | 10 | 9 | 10 | 12 | 15 | 14 | 13 | 14 | 14 | 13 | 14 | 14 | 12 | 11 | 11 | 12 |
5 | 2 | 3 | 5 | 6 | 8 | 7 | 7 | 5 | 4 | 5 | 6 | 8 | 6 | 7 | 9 | 10 | 9 | 10 | 10 | 10 | 8 | 10 | 12 | |
Swell 1 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | E 8 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 10 | E 6 | ESE 6 | E 6 | E 6 | E 6 |
 kJ | 69 | 66 | 63 | 44 | 28 | 27 | 25 | 15 | 15 | 8 | 9 | 10 | 4 | 4 | 4 | 4 | 3 | 4 | 8 | 12 | 37 | 36 | 37 | 51 |
Swell 2 Height (m) Direction Period (s) | E 15 | E 15 | E 15 | E 11 | NNE 4 | NNE 4 | NE 5 | NE 5 | NNE 5 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | E 10 | E 10 | E 10 | E 10 | E 10 | — | E 10 | E 10 | E 10 | E 10 | E 10 |
| kJ | 4 | 4 | 4 | 10 | 7 | 8 | 5 | 3 | 2 | 5 | 5 | 5 | 5 | 8 | 8 | 8 | 8 | 8 | — | 8 | 8 | 8 | 2 | 2 |
Swell 3 Height (m) Direction Period (s) | — | E 15 | E 15 | — | E 11 | E 11 | E 11 | E 11 | E 11 | E 10 | E 10 | E 10 | E 10 | ESE 7 | E 7 | E 7 | — | — | — | — | E 10 | — | — | E 11 |
| kJ | — | 4 | 4 | — | 10 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 5 | 1 | 1 | — | — | — | — | 2 | — | — | 2 |
Wind waves Height (m) Direction Period (s) | — | N 3 | N 4 | N 4 | — | — | SSE 3 | SSW 3 | SW 3 | SW 2 | SW 3 | SSW 3 | S 3 | S 4 | S 4 | S 4 | SSE 4 | SSE 5 | SE 5 | SE 5 | SE 5 | ESE 6 | — | — |
| kJ | — | 5 | 7 | 9 | — | — | 2 | 3 | 1 | 1 | 2 | 3 | 8 | 13 | 13 | 13 | 10 | 18 | 30 | 23 | 43 | 50 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 6 | 2 | 1 | 32 | 32 | 55 | 43 | 43 | 85 | 81 | 54 | 54 | 54 | 85 | 1225 | 888 | 959 | 525 | 738 | 467 | 334 | 295 | 272 | 52 |
Best forecast wave conditions in Massachusetts | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Ocean Swells (m)- Wind Speed (km/h)
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