Surf Forecasts:
Plum Island surf forecast from 20 Sep 2026:
- Best quality surf: Sunday 20 Sep, 11PM (local time) - 3ft (0.9m), 4s period, SE swell with cross-offshore winds.
- Most powerful swell: Friday 25 Sep, 2PM (local time) - 13ft (4.0m), 10s period, ENE swell with 3,448 kJ wave energy.
- Next surfable swell (1★+): Sunday 20 Sep, 11PM (local time) - 3ft (0.9m), 4s period with SE swell.
Best Forecast Surf Conditions for Plum Island this week:
The surf forecast for Plum Island over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 20) at 11PM. The primary swell is predicted to be 0.9m and 4s period with a secondary swell of 0.6m and 4s. Another secondary swell of 0.6m and 5s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Plum Island in the next 16 days are 4.0m 10s and forecast to arrive on Friday (Sep 25) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sun 20th Sep) | 3ft (0.9m) 4s |
| Best Surf | 11PM (Sun 20th Sep) | 3ft (0.9m) 4s |
| Most Powerful | 2PM (Fri 25th Sep) | 13ft (4.0m) 10s |
Table - best surf conditions forecast for Plum Island over the next 16 days.
Short Range ForecastModerate rain (total 16mm), heaviest on Sun night. Very mild (max 16°C on Mon afternoon, min 11°C on Sun night). Mainly fresh winds. | Days 4-6 Weather SummaryModerate rain (total 17mm), heaviest on Fri night. Very mild (max 14°C on Thu night, min 10°C on Fri afternoon). Mainly strong winds. | ||||||||||||||||||||
Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | |||||||||||||||
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) | ESE 11 | SE 11 | SE 5 | NE 5 | NE 5 | SE 9 | ENE 6 | ENE 6 | E 6 | E 7 | E 8 | ESE 10 | E 11 | E 11 | E 11 | E 11 | ENE 10 | ENE 10 | NE 9 | NE 8 | NE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 23 | 29 | 22 | 70 | 72 | 28 | 161 | 144 | 154 | 569 | 783 | 1354 | 2595 | 3037 | 2981 | 2062 | 3330 | 2936 | 1588 | 931 | 600 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 7:35PM2.21m | 8:18AM1.96m | 8:32PM2.26m | 9:12AM2.06m | 9:25PM2.34m | 9:57AM2.18m | 10:11PM2.42m | 10:38AM2.32m | 10:54PM2.50m | 11:17AM2.46m | 11:35PM2.56m | 11:55AM2.59m | 00:16AM2.60m | ||||||||
Low Tide | 2:14PM0.62m | 2:55AM0.39m | 3:08PM0.58m | 3:45AM0.34m | 3:57PM0.49m | 4:30AM0.27m | 4:42PM0.37m | 5:10AM0.20m | 5:23PM0.24m | 5:47AM0.12m | 6:02PM0.11m | 6:22AM0.05m | 6:41PM-0.02m | ||||||||
 |  |  |  | |  | |  | | | | | | |  | | |  |  |  | | |
 | 6:26 | — | — | 6:28 | — | — | 6:28 | — | — | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — | 6:33 | — | — |
 | — | 6:45 | — | — | 6:43 | — | — | 6:40 | — | — | 6:38 | — | — | 6:37 | — | — | 6:36 | — | — | 6:34 | — |
mm | — | 4 | 12 | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | 3 | 10 | 18 | 6 | — |
Temp °C | 14 | 14 | 15 | 14 | 16 | 16 | 11 | 11 | 13 | 13 | 12 | 13 | 12 | 13 | 14 | 12 | 10 | 11 | 12 | 15 | 15 |
Feels °C | 12 | 12 | 14 | 9 | 12 | 12 | 6 | 5 | 7 | 6 | 5 | 8 | 5 | 6 | 7 | 4 | 2 | 4 | 6 | 9 | 7 |
Swell 1 Height (m) Direction Period (s) | SE 7 | SE 11 | SE 5 | SE 10 | NE 5 | SE 9 | SE 8 | SE 8 | E 13 | E 13 | — | — | — | — | ESE 11 | E 11 | E 10 | E 10 | SE 9 | E 9 | SSE 8 |
| kJ | 14 | 29 | 22 | 16 | 38 | 27 | 23 | 28 | 4 | 3 | — | — | — | — | 2252 | 2062 | 1854 | 970 | 99 | 26 | 6 |
Swell 2 Height (m) Direction Period (s) | ESE 11 | E 9 | ESE 8 | ESE 8 | SE 9 | E 16 | E 14 | E 14 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 23 | 6 | 14 | 12 | 14 | 5 | 4 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | SE 8 | SE 8 | ESE 10 | ESE 5 | ESE 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 3 | 3 | 11 | 2 | 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 3 | SSE 4 | — | NE 5 | NE 5 | ENE 4 | ENE 6 | ENE 6 | E 6 | E 7 | E 8 | ESE 10 | E 11 | E 11 | E 11 | NE 7 | ENE 10 | ENE 10 | NE 9 | NE 8 | NE 8 |
| kJ | 5 | 18 | — | 70 | 72 | 28 | 161 | 144 | 154 | 569 | 783 | 1354 | 2595 | 3037 | 2981 | 612 | 3330 | 2936 | 1588 | 931 | 600 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 926 | 118 | 499 | 507 | 551 | 551 | 633 | 922 | 920 | 2724 | 628 | 1034 | 926 | 863 | 1174 | 1037 | 512 | 512 | 512 | 1895 |
Best forecast wave conditions in Massachusetts | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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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 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.
Information about the Plum Island Surf forecast
The above surf forecast table for Plum Island provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Plum Island can be found by selecting the local surf guide option on the grey menu. Our Plum Island 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 (Plum Island) 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 Plum Island 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.
Plum Island is 6 km (4 miles) from Newburyport. If you plan a vacation in Massachusetts, look for hotels and other accommodation in Newburyport. Newburyport has rooms for a wide range of budgets as well as car hire and transport links.
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