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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 7 pm 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 12AM is: 0.4m 7s primary swell from a East direction and 0.2m 4s secondary swell from a North-northeast direction, 0.4m 3s secondary swell from a South-southwest direction (forecast issued at 07:00pm May 12). The wind direction is predicted to be onshore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 May) | 1ft (0.3m) | 7s |
| Afternoon (13 May) | 2.5ft (0.7m) | 4s |
| Evening (13 May) | 2.5ft (0.7m) | 4s |
Table - waves today at Green Harbor. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 15mm), heaviest on Thu afternoon. Very mild (max 16°C on Wed afternoon, min 8°C on Fri afternoon). Winds decreasing (fresh winds from the S on Wed afternoon, calm by Thu night). | ||||||||||||||||||||||||
Tue 12 | Wednesday 13 | Thursday 14 | Fri 15 | |||||||||||||||||||||
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 | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | S 4 | S 4 | S 4 | S 4 | S 4 | SSE 5 | E 10 | E 10 | E 10 | ESE 6 | E 6 | E 7 | E 7 | E 7 | E 10 | E 10 | E 10 | |
27 | 25 | 15 | 15 | 8 | 9 | 10 | 12 | 18 | 13 | 9 | 9 | 15 | 8 | 8 | 8 | 170 | 101 | 91 | 73 | 74 | 148 | 371 | 384 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross-on | cross-on | cross-on | glassy | off | off | off | off | |
High Tide | 8:34PM2.73m | 9:00AM2.70m | 9:22PM2.92m | 9:53AM2.77m | 10:09PM3.11m | 10:43AM2.85m | ||||||||||||||||||
Low Tide | 2:18PM0.34m | 2:47AM0.30m | 3:07PM0.29m | 3:39AM0.10m | 3:54PM0.22m | 4:30AM-0.09m | ||||||||||||||||||
 |  |  | | | | |  | |  | | | | |  | |  |  | | | | | | | |
 | — | — | — | — | 5:24 | — | — | — | — | — | — | — | 5:22 | — | — | — | — | — | — | — | 5:22 | — | — | — |
 | 7:52 | — | — | — | — | — | — | — | 7:53 | — | — | — | — | — | — | — | 7:54 | — | — | — | — | — | — | 7:55 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 6 | 5 | — | — | — | — | 1 | 1 | |
Temp °C | 13 | 12 | 10 | 10 | 9 | 10 | 13 | 16 | 15 | 14 | 14 | 14 | 13 | 14 | 14 | 13 | 13 | 12 | 12 | 11 | 10 | 10 | 9 | 8 |
8 | 7 | 5 | 5 | 5 | 6 | 8 | 8 | 8 | 8 | 9 | 10 | 9 | 10 | 10 | 9 | 12 | 10 | 11 | 10 | 8 | 7 | 6 | 3 | |
Swell 1 Height (m) Direction Period (s) | 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 10 | E 6 | ESE 6 | E 6 | E 7 | E 7 | E 7 | E 10 | E 10 | E 10 |
 kJ | 27 | 25 | 15 | 15 | 8 | 9 | 10 | 9 | 4 | 4 | 4 | 4 | 4 | 8 | 8 | 7 | 77 | 101 | 91 | 73 | 74 | 148 | 371 | 384 |
Swell 2 Height (m) Direction Period (s) | NE 4 | NE 4 | NNE 4 | E 11 | ESE 7 | ESE 7 | ESE 7 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | — | — | E 10 | E 10 | E 11 | S 8 | ESE 9 | E 10 | ENE 7 | S 10 | S 10 |
| kJ | 4 | 3 | 2 | 9 | 5 | 5 | 5 | 8 | 8 | 8 | 8 | 8 | 8 | — | — | 8 | 2 | 2 | 33 | 29 | 67 | 58 | 2 | 7 |
Swell 3 Height (m) Direction Period (s) | E 11 | E 11 | E 11 | NE 4 | E 10 | E 10 | E 10 | SE 7 | SE 7 | E 7 | E 7 | — | — | — | — | — | — | — | SE 8 | S 9 | S 8 | S 11 | — | — |
| kJ | 9 | 9 | 9 | 1 | 8 | 8 | 8 | 2 | 2 | 1 | 1 | — | — | — | — | — | — | — | 16 | 2 | 5 | 9 | — | — |
Wind waves Height (m) Direction Period (s) | — | S 3 | SSW 3 | SW 3 | SW 2 | SW 2 | SSW 3 | S 4 | S 4 | S 4 | S 4 | S 4 | SSE 5 | SE 5 | ESE 5 | ESE 5 | ESE 6 | SSE 4 | — | — | — | — | — | — |
| kJ | — | 2 | 3 | 1 | 1 | 1 | 2 | 12 | 18 | 13 | 9 | 9 | 15 | 26 | 38 | 36 | 170 | 6 | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 43 | 81 | 43 | 57 | 54 | 54 | 1225 | 1225 | 1225 | 959 | 396 | 525 | 358 | 381 | 341 | 102 | 2 | 1 | 2 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Massachusetts | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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