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Plum Island Surf Forecast
/ Massachusetts (29 breaks) / Massachusetts (28 breaks) /
Surf Forecasts:
Plum Island surfForecast / Massachusetts / USA
48hr Weather and Surf, issued 7 am Thursday 21 May 2026 EDTForecast update in hr min s Forecast update imminent
Plum Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Plum Island sea temperature is
11.1° C
(Which is 1.2°C warmer than normal for this time of year)How big are the waves at Plum Island today?
The current surf forecast for Plum Island at 10AM is: 0.4m 9s primary swell from a Southeast direction and 0.1m 14s secondary swell from a East direction, 0.6m 4s secondary swell from a Northeast direction (forecast issued at 07:00am May 21). The wind direction is predicted to be onshore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 1.5ft (0.4m) | 9s |
| Afternoon (21 May) | 2ft (0.6m) | 5s |
| Evening (21 May) | 1ft (0.3m) | 9s |
Table - waves today at Plum Island. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Very mild (max 15°C on Thu afternoon, min 11°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 21 | Friday 22 | Saturday 23 | Sun 24 | |||||||||||||||||||||
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 | 2 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SE 9 | SE 9 | SE 9 | NE 5 | ENE 5 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | ESE 9 | SE 9 | |
29 | 28 | 28 | 20 | 17 | 12 | 12 | 13 | 13 | 13 | 13 | 14 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 9 | 14 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-on | on | cross-on | glassy | cross | glassy | cross-on | cross | cross-on | on | cross-on | cross | cross | cross-off | off | glassy | cross | cross-on | on | cross-on | cross | cross | on | |
High Tide | 3:37AM2.87m | 4:21PM2.42m | 4:37AM2.73m | 5:24PM2.38m | 5:40AM2.57m | 6:29PM2.36m | ||||||||||||||||||
Low Tide | 10:41AM-0.17m | 10:58PM0.24m | 11:43AM-0.06m | 00:05AM0.28m | 12:44PM0.03m | 1:12AM0.28m | ||||||||||||||||||
 |  |  | | | | |  | |  | | | | | | | | | | | | | | | |
 | 5:15 | — | — | — | — | — | — | — | 5:13 | — | — | — | — | — | — | — | 5:13 | — | — | — | — | — | — | 5:11 |
 | — | — | — | — | — | 8:04 | — | — | — | — | — | — | — | 8:05 | — | — | — | — | — | — | — | 8:06 | — | 8:07 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 16 | 13 | 12 | 14 | 15 | 15 | 14 | 12 | 11 | 11 | 13 | 14 | 13 | 13 | 14 | 13 | 13 | 13 | 14 | 15 | 14 | 14 | 13 | 13 |
13 | 9 | 9 | 11 | 13 | 12 | 12 | 7 | 7 | 7 | 9 | 9 | 7 | 8 | 10 | 9 | 10 | 10 | 10 | 11 | 10 | 10 | 9 | 10 | |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | NE 5 | ENE 5 | NE 4 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | NE 4 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | ESE 9 | SE 9 |
 kJ | 29 | 28 | 28 | 20 | 17 | 5 | 12 | 13 | 13 | 13 | 13 | 2 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 9 | 14 |
Swell 2 Height (m) Direction Period (s) | E 14 | E 14 | E 14 | SE 9 | SE 9 | SE 9 | ENE 4 | SE 6 | SE 5 | SE 5 | SE 5 | SE 9 | NE 4 | — | SE 13 | SSE 3 | SSE 2 | — | E 13 | E 13 | — | — | — | E 12 |
| kJ | 4 | 4 | 4 | 12 | 12 | 12 | 1 | 1 | 1 | 1 | 1 | 14 | 2 | — | 7 | 1 | 1 | — | 4 | 3 | — | — | — | 3 |
Swell 3 Height (m) Direction Period (s) | E 15 | — | E 15 | E 14 | E 14 | E 15 | SE 6 | — | E 14 | E 13 | E 13 | E 13 | SE 13 | SE 13 | — | SE 13 | E 13 | E 13 | — | — | — | — | — | SE 12 |
| kJ | 4 | — | 4 | 4 | 4 | 4 | 1 | — | 4 | 3 | 3 | 3 | 7 | 7 | — | 7 | 4 | 4 | — | — | — | — | — | 6 |
Wind waves Height (m) Direction Period (s) | NNW 3 | NNE 4 | NE 4 | SE 6 | SE 6 | SSE 6 | — | ENE 4 | NE 3 | NE 3 | NE 4 | — | — | SSE 2 | S 3 | — | — | — | — | — | — | — | SSE 2 | SE 3 |
| kJ | 3 | 10 | 16 | 1 | 1 | 3 | — | 1 | 3 | 5 | 4 | — | — | 1 | 1 | — | — | — | — | — | — | — | 1 | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 54 | 152 | 166 | 170 | 169 | 170 | 319 | 507 | 626 | 319 | 627 | 627 | 863 | 880 | 872 | 885 | 885 | 772 | 772 | 895 | 897 | 772 | 483 | 1276 |
Best forecast wave conditions in Massachusetts | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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