Surf Forecasts:
How big are the waves at Plum Island today (18 Aug):
- Afternoon surf: Afternoon surf (18 Aug, local time) - 1.5ft (0.4m), 9s period with SE swell.
- Evening surf: Evening surf (18 Aug, local time) - 2.5ft (0.8m), 8s period with SE swell.
The current surf forecast for Plum Island at 10PM is: 0.7m 8s primary swell from a Southeast direction and 0.3m 4s secondary swell from a East direction (forecast issued at 07:00pm August 18). The wind direction is predicted to be cross-shore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Aug) | - | - |
| Afternoon (18 Aug) | 1.5ft (0.4m) | 9s |
| Evening (18 Aug) | 2.5ft (0.8m) | 8s |
Table - waves today at Plum Island. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 27°C on Wed night, min 18°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Tue 18 | Wednesday 19 | Thursday 20 | |||||||||||||||||
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) | SE 9 | SE 8 | SE 8 | SE 8 | SE 7 | SE 7 | SE 7 | SE 7 | SE 7 | SSE 6 | SE 6 | SSE 6 | SE 6 | SE 8 | SE 8 | SE 7 | ESE 7 | ESE 7 | SE 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 62 | 82 | 63 | 57 | 39 | 38 | 37 | 36 | 52 | 88 | 60 | 46 | 39 | 69 | 45 | 44 | 36 | 37 | 27 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross | glassy | glassy | glassy | glassy | cross-on | glassy | cross-off | off | cross-off | off | off | off | off | cross-off | cross-off | cross-off |
High Tide | 4:42PM2.40m | 5:10AM2.14m | 5:30PM2.31m | 6:04AM2.00m | 6:23PM2.24m | ||||||||||||||
Low Tide | 11:43PM0.12m | 11:59AM0.30m | 00:40AM0.21m | 12:55PM0.42m | |||||||||||||||
 |  |  | | |  | | | | |  | | |  | | | | | | |
 | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — |
 | 7:40 | — | — | — | — | — | — | — | 7:38 | — | — | — | — | — | — | — | 7:37 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 20 | 20 | 20 | 19 | 20 | 23 | 25 | 26 | 27 | 24 | 23 | 22 | 22 | 24 | 24 | 20 | 21 | 21 |
Feels °C | 22 | 22 | 22 | 22 | 21 | 23 | 25 | 25 | 27 | 27 | 24 | 22 | 22 | 22 | 25 | 22 | 18 | 20 | 19 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 8 | SE 8 | SE 8 | SE 7 | SE 7 | SE 7 | SE 7 | SE 7 | SE 6 | SE 6 | SSE 6 | SE 6 | SE 8 | SE 8 | SE 7 | ESE 7 | ESE 7 | SE 7 |
| kJ | 62 | 82 | 63 | 57 | 39 | 38 | 37 | 36 | 35 | 46 | 60 | 46 | 39 | 69 | 45 | 44 | 36 | 37 | 27 |
Swell 2 Height (m) Direction Period (s) | SE 4 | E 4 | — | SE 9 | SE 9 | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 9 | ESE 8 | SE 8 | — | — | — | SE 9 | SE 9 | E 8 |
| kJ | 5 | 3 | — | 20 | 12 | 13 | 19 | 18 | 11 | 18 | 12 | 7 | 18 | — | — | — | 3 | 3 | 12 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | E 16 | E 16 | SW 3 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 | 5 | 2 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SE 7 | SSE 6 | SSE 6 | SW 3 | WSW 3 | WSW 2 | WSW 2 | — | SW 3 | SW 3 | NNW 2 |
| kJ | — | — | — | — | — | — | — | — | 52 | 88 | 56 | 1 | 1 | 1 | 1 | — | 2 | 2 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 166 | 166 | 4 | 0 | 4 | 4 | 4 | 211 | 0 | 0 | 0 | 9 | 13 | 0 | 4 | 4 | 4 | 4 | 4 |
Best forecast wave conditions in Massachusetts | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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 Plum Island 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.
Nearest