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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 pm Thursday 30 Apr 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
8.2° C
(Which is slightly warmer than usual)How big are the waves at Green Harbor today?
The current surf forecast for Green Harbor at 9PM is: 1.3m 10s primary swell from a East direction and 0.1m 12s secondary swell from a Southeast direction (forecast issued at 01:00pm April 30). The wind direction is predicted to be glassy.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 Apr) | 4.5ft (1.4m) | 10s |
| Afternoon (30 Apr) | 4.5ft (1.4m) | 10s |
| Evening (30 Apr) | 4.5ft (1.3m) | 10s |
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 16mm), heaviest on Sat night. Very mild (max 13°C on Fri afternoon, min 7°C on Thu night). Winds increasing (calm on Thu afternoon, fresh winds from the NNW by Sun morning). | ||||||||||||||||||||||||
Thu 30 | Friday 1 | Saturday 2 | Sun 3 | |||||||||||||||||||||
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 | 2 AM | 5 AM | 8 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | |
384 | 377 | 326 | 319 | 319 | 267 | 257 | 211 | 168 | 164 | 157 | 157 | 125 | 122 | 122 | 94 | 94 | 96 | 99 | 99 | 101 | 127 | 99 | 94 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | glassy | glassy | cross-off | cross | cross-on | cross | cross | cross-off | off | cross-off | cross-on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | |
High Tide | 11:32AM2.76m | 11:43PM2.98m | 12:13PM2.70m | 00:20AM2.96m | 12:51PM2.64m | 00:55AM2.92m | ||||||||||||||||||
Low Tide | 5:27PM0.29m | 5:58AM0.07m | 6:05PM0.35m | 6:36AM0.09m | 6:42PM0.42m | 7:14AM0.12m | ||||||||||||||||||
 | | |  |  | | |  | |  | |  | | | | | | | | | |  | |  | |
 | — | — | — | — | — | — | 5:39 | — | — | — | — | — | — | — | 5:37 | — | — | — | — | — | — | — | 5:35 | — |
 | — | — | 7:39 | — | — | — | — | — | — | — | 7:40 | — | — | — | — | — | — | — | 7:42 | — | — | — | — | 7:43 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 5 | 5 | |
Temp °C | 9 | 10 | 10 | 10 | 10 | 8 | 7 | 8 | 11 | 13 | 13 | 13 | 12 | 11 | 10 | 10 | 12 | 13 | 12 | 10 | 8 | 8 | 8 | 7 |
7 | 9 | 9 | 8 | 8 | 5 | 3 | 3 | 6 | 10 | 9 | 9 | 8 | 7 | 6 | 7 | 9 | 9 | 7 | 6 | 5 | 6 | 6 | 2 | |
Swell 1 Height (m) Direction Period (s) | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 |
 kJ | 384 | 377 | 326 | 319 | 319 | 267 | 257 | 211 | 168 | 164 | 157 | 157 | 125 | 122 | 122 | 94 | 94 | 96 | 99 | 99 | 101 | 127 | 99 | 94 |
Swell 2 Height (m) Direction Period (s) | SE 12 | S 12 | SE 12 | SE 12 | S 12 | S 12 | S 12 | S 12 | S 12 | NNW 3 | NNW 3 | — | — | — | SW 4 | — | — | — | — | — | — | — | S 3 | — |
| kJ | 6 | 3 | 6 | 6 | 3 | 3 | 3 | 3 | 3 | 2 | 1 | — | — | — | 1 | — | — | — | — | — | — | — | 1 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | S 12 | S 12 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 3 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | NW 2 | NNW 3 | N 3 | — | SE 2 | SW 4 | SW 4 | SSW 2 | SW 4 | SSW 4 | — | SSW 2 | S 3 | S 3 | S 4 | — | — |
| kJ | — | — | — | — | — | — | — | 1 | 1 | 1 | — | 1 | 4 | 4 | 1 | 1 | 3 | — | 2 | 4 | 1 | 4 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 32 | 0 | 0 | 0 | 2 | 1 | 1 | 1 | 1 | 1 | 6 | 15 | 6 | 1 | 6 | 49 | 55 |
Best forecast wave conditions in Massachusetts | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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