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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 Monday 18 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
10.4° C
(Which is slightly warmer than usual)How big are the waves at Green Harbor today?
The current surf forecast for Green Harbor at 10PM is: 0.2m 9s primary swell from a East-southeast direction and 0.3m 4s secondary swell from a Southeast direction, 0.4m 2s secondary swell from a Southwest direction (forecast issued at 07:00pm May 18). The wind direction is predicted to be cross-onshore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | - | - |
| Afternoon (18 May) | 0.5ft (0.2m) | 8s |
| Evening (18 May) | 0.5ft (0.2m) | 9s |
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 2mm), mostly falling on Wed afternoon. Warm (max 32°C on Wed afternoon, min 10°C on Thu afternoon). Mainly fresh winds. | ||||||||||||||||||||||||
Mon 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | S 4 | SSW 4 | ESE 10 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | E 10 | E 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 9 | NE 6 | |
6 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 13 | 11 | 9 | 9 | 8 | 9 | 9 | 9 | 7 | 7 | 9 | 8 | 8 | 8 | 7 | 46 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | on | on | on | on | on | on | cross-on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | cross-off | cross-off | off | cross-off | |
High Tide | 1:27AM3.53m | 2:08PM2.95m | 2:21AM3.48m | 3:04PM2.91m | 3:19AM3.38m | |||||||||||||||||||
Low Tide | 7:11PM0.02m | 7:54AM-0.42m | 8:04PM0.03m | 8:49AM-0.36m | 9:01PM0.08m | 9:45AM-0.26m | ||||||||||||||||||
 |  | | | | | | | |  | | | | | | |  | |  | | | |  | | |
 | — | — | — | — | 5:18 | — | — | — | — | — | — | — | 5:16 | — | — | — | — | — | — | — | 5:16 | — | — | — |
 | 7:59 | — | — | — | — | — | — | — | — | 8:00 | — | — | — | — | — | — | — | 8:00 | — | — | — | — | — | 8:01 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | |
Temp °C | 23 | 20 | 19 | 20 | 20 | 21 | 27 | 29 | 26 | 23 | 21 | 22 | 22 | 24 | 30 | 32 | 26 | 23 | 20 | 15 | 13 | 11 | 11 | 10 |
21 | 17 | 17 | 17 | 18 | 19 | 25 | 25 | 22 | 22 | 20 | 21 | 21 | 23 | 28 | 30 | 25 | 22 | 17 | 9 | 7 | 4 | 6 | 6 | |
Swell 1 Height (m) Direction Period (s) | ESE 8 | SE 4 | SE 4 | SE 4 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | E 10 | E 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 9 | NE 6 |
 kJ | 6 | 3 | 2 | 2 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 9 | 9 | 9 | 7 | 7 | 9 | 8 | 8 | 8 | 7 | 46 |
Swell 2 Height (m) Direction Period (s) | — | ESE 9 | ESE 9 | ESE 9 | SE 4 | SE 5 | E 13 | E 13 | E 16 | E 16 | E 16 | SE 5 | SE 5 | E 12 | E 12 | SE 5 | SE 5 | SE 5 | E 12 | E 14 | E 14 | E 15 | E 14 | E 9 |
| kJ | — | 8 | 8 | 8 | 1 | 1 | 3 | 3 | 5 | 5 | 5 | 1 | 1 | 3 | 3 | 1 | 1 | 1 | 3 | 4 | 4 | 4 | 4 | 7 |
Swell 3 Height (m) Direction Period (s) | S 7 | — | NE 4 | NE 4 | SE 5 | — | — | E 16 | — | — | — | E 16 | E 16 | E 12 | E 15 | E 12 | — | E 12 | E 15 | — | E 15 | E 15 | E 15 | E 14 |
| kJ | 1 | — | 1 | 1 | 1 | — | — | 5 | — | — | — | 5 | 5 | 3 | 5 | 3 | — | 3 | 4 | — | 4 | 4 | 4 | 4 |
Wind waves Height (m) Direction Period (s) | ESE 4 | SSW 2 | SW 2 | SW 3 | SW 3 | SW 3 | SSW 3 | S 3 | S 4 | SSW 4 | SW 3 | SW 3 | SW 3 | SW 3 | SW 3 | SW 3 | WSW 3 | WNW 4 | NW 4 | NW 4 | N 4 | N 4 | N 4 | — |
| kJ | 5 | 1 | 1 | 2 | 2 | 2 | 3 | 7 | 13 | 11 | 4 | 3 | 3 | 2 | 2 | 2 | 1 | 6 | 6 | 4 | 15 | 23 | 13 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 515 | 124 | 515 | 91 | 91 | 94 | 333 | 1225 | 94 | 43 | 81 | 81 | 85 | 333 | 337 | 124 | 131 | 77 | 58 | 125 | 106 | 109 | 85 | 515 |
Best forecast wave conditions in Massachusetts | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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