Plum Island Surf Break

Lat Long: 42.80° N 70.81° W

Plum Island 48 hour detailed Surf Forecast

Issued: 1 pm 11 Sep 2026 (local time)

Forecast update in  hr  min

Today's Plum Island sea temperature is
18.4°C
0.6° 

Plum Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Plum Island today (11 Sep):

  • Morning surf: Morning surf (11 Sep, local time) - 1ft (0.3m), 10s period with SE swell.
  • Afternoon surf: Afternoon surf (11 Sep, local time) - 1.5ft (0.4m), 10s period with SE swell.
  • Evening surf: Evening surf (11 Sep, local time) - 1ft (0.3m), 11s period with SE swell.

The current surf forecast for Plum Island at 5PM is: 0.3m 10s primary swell from a Southeast direction and 0.1m 5s secondary swell from a Northeast direction (forecast issued at 01:00pm September 11). The wind direction is predicted to be cross-offshore.

Time (EDT) & DateWave HeightWave Period
Morning (11 Sep)1ft (0.3m)10s
Afternoon (11 Sep)1.5ft (0.4m)10s
Evening (11 Sep)1ft (0.3m)11s

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


Short Range Forecast

Moderate rain (total 17mm), heaviest on Sun morning. Warm (max 24°C on Fri afternoon, min 14°C on Sat morning). Wind will be generally light.

Fri
11
Saturday
12
Sunday
13
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
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.3
SE
10
0.4
SE
10
0.3
SE
10
0.2
ESE
11
0.3
SE
11
0.3
SE
11
0.3
SE
11
0.2
ESE
10
0.2
ESE
10
0.2
ESE
10
0.2
ESE
10
0.9
SSE
4
0.9
SSE
4
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
9
0.4
SE
9
Wave Graph
Metric surfscale
Energy kJ
15
24
17
11
18
18
18
9
9
9
9
23
31
18
18
15
24
24
23
22
22
Wind (km/h)
20
WNW
15
NW
15
NW
10
NW
10
NNW
10
NE
5
N
5
N
10
ESE
15
SE
20
SE
15
SSE
15
SSW
10
SSW
10
SSW
10
S
20
SSE
15
SE
5
E
5
W
10
SW
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-on
glassy
cross
on
cross-on
cross-on
cross
cross-off
cross-off
cross-off
cross
cross
cross-on
glassy
glassy
cross-off
High Tide
12:30PM2.63m
00:50AM2.72m
1:14PM2.65m
1:36AM2.63m
1:55PM2.63m
Low Tide
7:06PM-0.14m
7:32AM-0.18m
7:54PM-0.17m
8:16AM-0.11m
8:41PM-0.15m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
cloud
cloud
part cloud
cloud
mod rain
light rain
light rain
cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:18
6:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:00
6:59
6:57
 mm
9
4
1
Temp °C
19
23
24
21
18
16
15
14
17
19
18
20
19
18
18
17
17
17
17
17
18
Feels °C
14
18
20
18
15
14
14
13
15
16
15
18
18
17
18
17
16
17
19
19
19
  • 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
How to use the Wavefinder 

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 locationNearest