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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 21 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
12.5° C
(Which is 2.2°C warmer than normal for this time of year)How big are the waves at Green Harbor today?
The current surf forecast for Green Harbor at 9PM is: 0.6m 5s primary swell from a Northeast direction and 0.2m 9s secondary swell from a East direction (forecast issued at 01:00pm May 21). The wind direction is predicted to be cross-shore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 0.5ft (0.2m) | 9s |
| Afternoon (21 May) | 2ft (0.6m) | 5s |
| Evening (21 May) | 2ft (0.6m) | 5s |
Table - waves today at Green Harbor. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Very mild (max 14°C on Thu night, min 9°C on Sun morning). Wind will be generally light. | ||||||||||||||||||||||||
Thu 21 | Friday 22 | Saturday 23 | Sun 24 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
ESE 9 | NE 5 | NE 5 | NE 5 | NE 5 | E 9 | E 14 | E 11 | E 13 | E 13 | NE 4 | NE 4 | NE 4 | E 13 | E 10 | E 14 | E 13 | E 13 | E 10 | E 10 | E 12 | ESE 10 | E 12 | E 12 | |
8 | 17 | 25 | 17 | 8 | 7 | 4 | 3 | 3 | 3 | 12 | 9 | 4 | 4 | 2 | 4 | 4 | 3 | 2 | 2 | 3 | 9 | 3 | 3 | |
Wind (km/h) | ||||||||||||||||||||||||
off | cross-off | cross-off | cross-off | glassy | cross-off | off | off | off | off | cross-off | cross | cross-on | on | glassy | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | |
High Tide | 4:01PM2.88m | 4:19AM3.24m | 5:02PM2.85m | 5:21AM3.09m | 6:04PM2.85m | 6:26AM2.94m | ||||||||||||||||||
Low Tide | 9:45AM-0.26m | 10:00PM0.14m | 10:43AM-0.14m | 11:03PM0.20m | 11:42AM-0.02m | 00:08AM0.24m | ||||||||||||||||||
 | | | |  | |  |  | | | |  | | | | | | | | | | | | | |
 | — | — | — | — | — | — | 5:15 | — | — | — | — | — | — | — | 5:15 | — | — | — | — | — | — | — | 5:13 | — |
 | — | — | — | 8:01 | — | — | — | — | — | — | — | 8:01 | — | — | — | — | — | — | — | 8:02 | — | — | — | 8:04 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 13 | 13 | 13 | 12 | 14 | 13 | 11 | 11 | 11 | 11 | 12 | 12 | 13 | 12 | 11 | 12 | 12 | 13 | 14 | 13 | 13 | 12 | 11 | 11 |
9 | 9 | 9 | 9 | 12 | 10 | 5 | 5 | 6 | 6 | 8 | 7 | 8 | 8 | 8 | 8 | 8 | 9 | 10 | 9 | 9 | 9 | 8 | 6 | |
Swell 1 Height (m) Direction Period (s) | ESE 9 | NE 5 | NE 5 | NE 5 | NE 5 | NE 4 | SE 9 | SE 9 | E 10 | E 10 | NE 4 | NE 4 | NE 4 | ENE 4 | NE 4 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | ESE 10 | SE 7 | E 9 |
 kJ | 8 | 17 | 25 | 17 | 8 | 5 | 3 | 3 | 2 | 2 | 12 | 9 | 4 | 3 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 9 | 2 | 2 |
Swell 2 Height (m) Direction Period (s) | E 14 | ESE 9 | E 9 | E 9 | E 9 | E 9 | E 11 | E 11 | E 13 | E 13 | E 10 | E 10 | E 10 | E 10 | — | E 14 | E 13 | — | — | S 6 | S 7 | SE 4 | E 9 | E 12 |
| kJ | 4 | 8 | 7 | 7 | 7 | 7 | 2 | 2 | 3 | 3 | 2 | 2 | 2 | 2 | — | 4 | 4 | — | — | 1 | 1 | 1 | 2 | 3 |
Swell 3 Height (m) Direction Period (s) | E 15 | E 14 | E 15 | — | S 6 | S 6 | E 14 | — | E 13 | E 13 | E 13 | E 13 | E 13 | E 13 | E 10 | S 6 | S 6 | E 13 | — | E 10 | E 12 | — | E 12 | E 12 |
| kJ | 4 | 4 | 4 | — | 1 | 3 | 4 | — | 3 | 3 | 3 | 3 | 4 | 4 | 2 | 1 | 1 | 3 | — | 2 | 3 | — | 3 | 3 |
Wind waves Height (m) Direction Period (s) | NNE 4 | — | — | — | — | — | NE 4 | NE 4 | NE 4 | NE 4 | — | — | ESE 2 | ESE 3 | — | ENE 3 | E 3 | E 3 | — | — | — | ESE 2 | ESE 4 | ESE 3 |
| kJ | 11 | — | — | — | — | — | 6 | 14 | 16 | 18 | — | — | 1 | 1 | — | 1 | 1 | 1 | — | — | — | 1 | 1 | 4 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 95 | 106 | 275 | 184 | 272 | 281 | 649 | 649 | 832 | 872 | 2655 | 2655 | 878 | 775 | 745 | 718 | 718 | 1198 | 1198 | 124 | 106 | 718 | 611 | 501 |
Best forecast wave conditions in Massachusetts | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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