Surf Forecasts:
How big are the waves at Green Harbor today (20 Sep):
- Morning surf: Morning surf (20 Sep, local time) - 0.5ft (0.2m), 11s period with E swell.
- Afternoon surf: Afternoon surf (20 Sep, local time) - 0.5ft (0.2m), 9s period with E swell.
- Evening surf: Evening surf (20 Sep, local time) - 1ft (0.3m), 9s period with E swell.
The current surf forecast for Green Harbor at 1PM is: 0.2m 9s primary swell from a East direction and 0.1m 4s secondary swell from a Northeast direction (forecast issued at 07:00am September 20). An open ocean swell of 0.3m 4s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Sep) | 0.5ft (0.2m) | 11s |
| Afternoon (20 Sep) | 0.5ft (0.2m) | 9s |
| Evening (20 Sep) | 1ft (0.3m) | 9s |
Table - waves today at Green Harbor. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 6mm), mostly falling on Sun night. Very mild (max 17°C on Sun night, min 12°C on Tue afternoon). Mainly fresh winds. | |||||||||||||||||||||||
Sunday 20 | Monday 21 | Tuesday 22 | |||||||||||||||||||||
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 11 | E 11 | E 11 | E 9 | E 9 | E 9 | SE 4 | E 8 | E 8 | E 8 | E 8 | E 8 | E 10 | E 10 | E 10 | E 16 | E 15 | ENE 6 | ENE 6 | ENE 7 | NE 7 | ENE 7 | ENE 6 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 9 | 9 | 9 | 6 | 15 | 15 | 18 | 12 | 12 | 5 | 5 | 5 | 2 | 3 | 2 | 5 | 4 | 179 | 239 | 269 | 286 | 237 | 209 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross | cross | cross-on | cross-on | cross-off | cross-off | cross-off | off | off | off | off | off | cross-off | off | off | off | off | off | off | off |
High Tide | 7:05AM2.25m | 7:22PM2.57m | 8:05AM2.27m | 8:20PM2.61m | 8:59AM2.35m | 9:13PM2.67m | |||||||||||||||||
Low Tide | 12:59PM0.73m | 1:46AM0.51m | 1:57PM0.69m | 2:41AM0.46m | 2:52PM0.61m | ||||||||||||||||||
 |  | |  | |  | | | | |  | | |  |  | | | | | | | | | |
 | 6:26 | — | — | — | — | — | — | — | 6:28 | — | — | — | — | — | — | — | 6:28 | — | — | — | — | — | — |
 | — | — | — | — | 6:44 | — | — | — | — | — | — | — | 6:42 | — | — | — | — | — | — | — | 6:39 | — | — |
mm | — | — | — | 1 | 1 | 1 | 1 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 16 | 15 | 16 | 16 | 17 | 15 | 13 | 14 | 14 | 14 | 15 | 16 | 16 | 16 | 14 | 13 | 13 | 12 | 12 | 12 | 13 |
Feels °C | 11 | 10 | 14 | 12 | 13 | 14 | 17 | 12 | 8 | 8 | 8 | 8 | 11 | 11 | 10 | 11 | 8 | 7 | 7 | 6 | 6 | 6 | 6 |
Swell 1 Height (m) Direction Period (s) | NE 5 | NE 5 | NE 5 | E 9 | E 9 | E 9 | ESE 4 | ESE 4 | ESE 4 | E 8 | E 8 | E 8 | E 10 | E 10 | E 10 | E 10 | E 10 | E 15 | E 14 | E 14 | E 14 | E 14 | E 13 |
| kJ | 6 | 4 | 3 | 6 | 15 | 15 | 7 | 7 | 4 | 5 | 5 | 5 | 2 | 2 | 2 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 |
Swell 2 Height (m) Direction Period (s) | E 7 | E 8 | E 7 | NE 4 | E 11 | E 11 | E 8 | E 8 | E 8 | ESE 4 | E 10 | E 10 | — | SE 8 | — | E 16 | E 15 | — | — | — | — | — | — |
| kJ | 4 | 5 | 4 | 1 | 2 | 2 | 13 | 12 | 12 | 2 | 2 | 2 | — | 3 | — | 5 | 4 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | E 11 | E 11 | E 11 | E 7 | NE 4 | — | — | S 10 | E 11 | E 10 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 9 | 9 | 9 | 1 | 1 | — | — | 2 | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | ESE 3 | ESE 3 | ESE 4 | SE 4 | ESE 4 | SE 4 | — | N 3 | N 4 | NNE 5 | NNE 6 | NE 6 | NE 6 | NE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | NE 7 | ENE 7 | ENE 6 |
| kJ | — | 1 | 2 | 3 | 6 | 10 | 18 | — | 5 | 50 | 107 | 156 | 159 | 92 | 69 | 74 | 111 | 179 | 239 | 269 | 286 | 237 | 209 |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 959 | 959 | 85 | 959 | 1820 | 341 | 43 | 54 | 275 | 131 | 524 | 524 | 524 | 526 | 647 | 647 | 526 | 515 | 515 | 655 | 3370 | 2632 | 878 |
Best forecast wave conditions in Massachusetts | |||||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||||
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