Plum Island surf break

Plum Island surfForecast / Massachusetts / USA

information circle48hr Weather and Surf, issued 7 am Saturday 21 Mar 2026 EDT
Forecast 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
3.4° C
(Which is normal for this time of year)

How big are the waves at Plum Island today?

The current surf forecast for Plum Island at 3PM is: 0.8m 8s primary swell from a Southeast direction and 0.5m 8s secondary swell from a East direction (forecast issued at 07:00am March 21). The wind direction is predicted to be cross-offshore.

Time (EDT) & DateWave HeightWave Period
Morning (21 Mar)3.5ft (1.0m)8s
Afternoon (21 Mar)2.5ft (0.8m)8s
Evening (21 Mar)2ft (0.6m)8s

Table - waves today at Plum Island. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent
Saturday
21
Sunday
22
Monday
23
Tue
24
5AM8AM11AM2PM5PM8PM11PM2AM5AM8AM11AM2PM5PM8PM11PM2AM5AM8AM11AM2PM5PM8PM11PM2AM
Rating
(10 max)
2
0
1
0
0
1
0
0
0
0
0
0
2
0
0
0
0
0
0
0
1
2
2
2
Swell
Height Map
Wave Height (m) & direction (?)
1.3
SSE
1.1
SE
0.9
SE
0.8
SE
0.7
SE
0.7
SE
0.6
SE
0.6
SE
0.6
SE
0.9
SE
1.2
SE
1.3
SE
1.4
SSE
1.3
SE
1.1
SE
0.9
SE
1.3
NE
1.9
NE
2.1
NE
2
NE
1.9
ENE
2.1
NE
1.7
ENE
1.5
ENE
Period(s) (?)888888888845667756777888
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1731471158064634043459155801191301158671269371395397478339247
Wind
(km/h)
10
NW
15
N
15
NNW
20
NW
20
NW
15
NW
10
NNE
5
ENE
10
SE
25
SE
25
SSE
20
S
10
NNW
25
N
30
N
35
NNE
30
NNE
30
NNE
25
NNE
20
NNE
15
NE
10
ENE
5
SSW
10
W
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
crosscross-
off
cross-
off
cross-
off
cross-
off
cross-
on
oncross-
on
cross-
on
cross-
on
crosscross-
off
crosscrosscross-
on
crosscrosscrosscross-
on
cross-
on
oncross-
off
off
High Tide
/ height (m)
2:07PM
2.65
2:25AM
2.87
2:55PM
2.58
3:13AM
2.86
3:45PM
2.46
Low Tide
/ height (m)
8:24AM
-0.29
8:36PM
-0.11
9:11AM
-0.29
9:22PM
-0.03
10:04AM
-0.23
10:13PM
0.09
Saturday
21
Sunday
22
Monday
23
Tue
24
Sunrise-6:45-------6:43-------6:41------
Sunset----6:55-------6:57-------6:58---
part cloud
cloud
clear
clear
part cloud
cloud
cloud
cloud
cloud
cloud
light rain
mod rain
mod rain
cloud
light snow
cloud
cloud
cloud
cloud
cloud
part cloud
part cloud
light snow
light snow
Rain (mm)
----------2106-----------
Temp. °C5368742222345211-1-101110-1
Feels °C (?)2-2121-1-2-2-3-5-4-12-4-7-8-10-9-8-6-4-3-3-5
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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.


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