Surf Forecasts:
How big are the waves at Green Harbor today (21 Aug):
- Morning surf: Morning surf (21 Aug, local time) - 1ft (0.3m), 8s period with E swell.
- Afternoon surf: Afternoon surf (21 Aug, local time) - 1.5ft (0.4m), 8s period with E swell.
- Evening surf: Evening surf (21 Aug, local time) - 1.5ft (0.4m), 8s period with E swell.
The current surf forecast for Green Harbor at 12PM is: 0.3m 8s primary swell from a East direction and 0.1m 15s secondary swell from a East direction (forecast issued at 07:00am August 21). An open ocean swell of 0.6m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Aug) | 1ft (0.3m) | 8s |
| Afternoon (21 Aug) | 1.5ft (0.4m) | 8s |
| Evening (21 Aug) | 1.5ft (0.4m) | 8s |
Table - waves today at Green Harbor. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 19mm), heaviest on Fri morning. Warm (max 25°C on Sun afternoon, min 18°C on Fri night). Wind will be generally light. | |||||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||||||||
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 |  |  |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | E 7 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 13 | E 13 | ENE 6 | E 6 | E 5 | E 5 | E 5 | E 5 | E 6 | E 7 | E 6 | E 12 | SE 5 | ESE 6 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 10 | 9 | 13 | 12 | 22 | 21 | 21 | 11 | 11 | 3 | 3 | 83 | 39 | 28 | 20 | 14 | 14 | 12 | 14 | 11 | 11 | 21 | 29 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-off | cross-off | off | off | cross-off | off | off | off | off | off | cross-off | cross | cross | cross-off | cross-off | off | cross-off | cross-off | cross-on | on | on |
High Tide | 6:45AM2.33m | 7:03PM2.65m | 7:46AM2.28m | 8:02PM2.64m | 8:45AM2.27m | 8:58PM2.66m | |||||||||||||||||
Low Tide | 12:40PM0.62m | 1:28AM0.45m | 1:37PM0.67m | 2:26AM0.46m | 2:33PM0.67m | ||||||||||||||||||
 |  | | | | | | | | | | |  |  |  | | | | |  | |  | | |
 | 5:56 | — | — | — | — | — | — | — | 5:56 | — | — | — | — | — | — | — | 5:58 | — | — | — | — | — | — |
 | — | — | — | — | 7:34 | — | — | — | — | — | — | — | 7:32 | — | — | — | — | — | — | — | 7:30 | — | — |
mm | 4 | 4 | 2 | 1 | 1 | 3 | 1 | 1 | 1 | 1 | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 19 | 19 | 19 | 19 | 18 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 22 | 25 | 23 | 22 |
Feels °C | 18 | 18 | 18 | 18 | 19 | 17 | 18 | 18 | 17 | 17 | 19 | 19 | 17 | 18 | 19 | 19 | 19 | 19 | 19 | 24 | 26 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | E 7 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 13 | E 13 | ENE 6 | E 6 | E 5 | E 5 | E 5 | E 5 | E 6 | E 7 | E 6 | E 5 | ENE 6 | ESE 6 |
| kJ | 10 | 9 | 13 | 12 | 22 | 21 | 21 | 11 | 11 | 3 | 3 | 83 | 39 | 28 | 20 | 14 | 14 | 9 | 14 | 9 | 7 | 13 | 29 |
Swell 2 Height (m) Direction Period (s) | E 9 | E 9 | E 15 | E 14 | E 14 | E 14 | E 14 | E 14 | E 13 | S 5 | E 13 | E 13 | E 13 | NE 4 | N 4 | N 4 | NNE 4 | NNE 4 | NNE 4 | NNE 4 | E 12 | E 12 | E 12 |
| kJ | 6 | 6 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 1 | 3 | 3 | 3 | 5 | 14 | 9 | 7 | 3 | 2 | 1 | 11 | 11 | 11 |
Swell 3 Height (m) Direction Period (s) | E 15 | E 15 | — | — | — | — | — | — | — | — | S 13 | E 13 | E 13 | E 13 | E 13 | E 8 | E 12 | E 12 | E 12 | E 12 | E 7 | — | E 6 |
| kJ | 4 | 4 | — | — | — | — | — | — | — | — | 3 | 3 | 3 | 3 | 13 | 4 | 12 | 12 | 11 | 11 | 4 | — | 1 |
Wind waves Height (m) Direction Period (s) | NE 3 | ENE 3 | E 4 | E 4 | E 4 | ENE 4 | ENE 4 | E 5 | E 5 | E 6 | E 6 | — | NNE 4 | N 4 | — | — | — | — | — | SSE 3 | SSE 2 | SE 5 | S 5 |
| kJ | 1 | 5 | 10 | 11 | 10 | 11 | 17 | 27 | 51 | 86 | 94 | — | 16 | 9 | — | — | — | — | — | 3 | 1 | 21 | 20 |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 94 | 94 | 515 | 888 | 888 | 108 | 94 | 94 | 106 | 272 | 976 | 56 | 39 | 39 | 15 | 43 | 81 | 81 | 832 | 358 | 359 | 6 | 6 |
Best forecast wave conditions in Massachusetts | |||||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||||
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