Surf Forecasts:
Green Harbor surf forecast from 11 Oct 2026:
- Most powerful swell: Sunday 18 Oct, 2PM (local time) - 4.5ft (1.4m), 6s period, N swell with 148 kJ wave energy.
Best Forecast Surf Conditions for Green Harbor this week:
The most powerful waves expected at Green Harbor in the next 16 days are 1.4m 6s and forecast to arrive on Sunday (Oct 18) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Sunday (Oct 18) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Sun 18th Oct) | 4.5ft (1.4m) 6s |
Table - best surf conditions forecast for Green Harbor over the next 16 days.
Short Range ForecastModerate rain (total 11mm), heaviest on Sun night. Very mild (max 18°C on Tue night, min 11°C on Sun night). Winds increasing (calm on Mon night, fresh winds from the SW by Tue night). | Days 4-6 Weather SummaryModerate rain (total 13mm), heaviest on Fri night. Warm (max 26°C on Wed afternoon, min 10°C on Fri morning). Winds increasing (light winds from the E on Thu night, fresh winds from the SSE by Fri afternoon). | ||||||||||||||||||||
Sunday 11 | Monday 12 | Tuesday 13 | Wednesday 14 | Thursday 15 | Friday 16 | Saturday 17 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | E 8 | E 8 | E 8 | ESE 11 | E 7 | E 7 | ENE 6 | ENE 7 | E 7 | E 8 | E 8 | E 7 | E 7 | E 7 | NE 5 | NE 6 | SE 5 | ESE 7 | ESE 8 | ESE 8 | ESE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 5 | 5 | 5 | 23 | 36 | 47 | 145 | 129 | 79 | 55 | 29 | 9 | 8 | 8 | 21 | 46 | 92 | 35 | 21 | 21 | 6 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | off | cross-off | glassy | off | cross | cross-on | on | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-off |
High Tide | 12:25PM3.12m | 00:54AM2.88m | 1:04PM3.08m | 1:35AM2.78m | 1:43PM3.00m | 2:16AM2.66m | 2:23PM2.91m | 2:58AM2.55m | 3:06PM2.81m | 3:43AM2.44m | 3:53PM2.71m | 4:33AM2.35m | 4:44PM2.62m | ||||||||
Low Tide | 6:39PM-0.08m | 6:51AM0.19m | 7:20PM-0.03m | 7:30AM0.29m | 8:01PM0.04m | 8:10AM0.40m | 8:44PM0.14m | 8:53AM0.50m | 9:29PM0.25m | 9:38AM0.60m | 10:17PM0.36m | 10:28AM0.68m | 11:10PM0.44m | ||||||||
 |  |  | |  |  | | |  | | | | | | |  | | | | | | |
 | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — |
 | — | 6:07 | — | — | 6:06 | — | — | 6:04 | — | — | 6:02 | — | — | 6:00 | — | — | 6:00 | — | — | 5:58 | — |
mm | — | — | 10 | — | — | — | — | — | 1 | — | — | — | — | — | — | 3 | 2 | 8 | — | — | 6 |
Temp °C | 13 | 14 | 13 | 13 | 17 | 16 | 13 | 15 | 18 | 22 | 26 | 21 | 12 | 13 | 12 | 11 | 15 | 19 | 12 | 13 | 10 |
Feels °C | 10 | 10 | 12 | 11 | 17 | 16 | 11 | 12 | 14 | 20 | 24 | 20 | 5 | 9 | 10 | 6 | 9 | 15 | 8 | 8 | 5 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 5 | E 7 | ESE 9 | ENE 6 | ENE 7 | E 7 | E 8 | E 8 | E 7 | E 7 | E 7 | NE 5 | NE 6 | NE 7 | ESE 7 | ESE 8 | ESE 8 | ESE 8 |
| kJ | 5 | 5 | 5 | 11 | 36 | 8 | 145 | 129 | 79 | 55 | 29 | 9 | 8 | 8 | 21 | 46 | 16 | 35 | 21 | 21 | 6 |
Swell 2 Height (m) Direction Period (s) | — | — | — | ESE 11 | ESE 10 | SSW 8 | S 8 | — | NE 6 | SE 7 | SSW 5 | — | E 8 | E 15 | E 10 | E 8 | E 14 | NE 5 | SSW 6 | — | SSW 7 |
| kJ | — | — | — | 23 | 19 | 7 | 5 | — | 6 | 2 | 5 | — | 1 | 4 | 7 | 6 | 4 | 1 | 8 | — | 5 |
Swell 3 Height (m) Direction Period (s) | — | — | — | SE 8 | SSW 9 | — | SE 8 | — | SE 8 | — | SSE 7 | S 5 | E 15 | E 10 | E 7 | E 14 | — | — | — | — | — |
| kJ | — | — | — | 2 | 16 | — | 3 | — | 2 | — | 5 | 2 | 4 | 2 | 1 | 4 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | SE 3 | ESE 4 | — | — | E 7 | — | ESE 6 | S 3 | WSW 3 | WNW 3 | NW 3 | N 4 | NE 4 | — | SE 4 | SE 5 | WSW 2 | SW 4 | SW 2 | NW 4 |
| kJ | — | 2 | 10 | — | — | 47 | — | 69 | 8 | 3 | 3 | 1 | 10 | 16 | — | 6 | 92 | 1 | 4 | 1 | 41 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 734 | 543 | 83 | 73 | 2 | 106 | 738 | 888 | 832 | 15 | 57 | 127 | 515 | 832 | 1205 | 794 | 333 | 15 | 56 | 57 | 515 |
Best forecast wave conditions in Massachusetts | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Green Harbor surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Green Harbor Surf forecast
The above surf forecast table for Green Harbor provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Green Harbor can be found by selecting the local surf guide option on the grey menu. Our Green Harbor surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Green Harbor) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Green Harbor may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Green Harbor is 5 km (3 miles) from Duxbury. If you plan a vacation in Massachusetts, look for hotels and other accommodation in Duxbury. Duxbury has rooms for a wide range of budgets as well as car hire and transport links.
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