Plum Island Surf Break

Lat Long: 42.80° N 70.81° W

Plum Island 48 hour detailed Surf Forecast

Issued: 7 pm 17 Sep 2026 (local time)

Forecast update in  hr  min

Today's Plum Island sea temperature is
16.8°C
0.3° 

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 (17 Sep):

  • Afternoon surf: Afternoon surf (17 Sep, local time) - 1.5ft (0.5m), 7s period with E swell.
  • Evening surf: Evening surf (17 Sep, local time) - 1.5ft (0.5m), 7s period with E swell.

The current surf forecast for Plum Island at 10PM is: 0.5m 7s primary swell from a East direction and 0.2m 12s secondary swell from a East-southeast direction, 0.7m 4s secondary swell from a South-southeast direction (forecast issued at 07:00pm September 17). The wind direction is predicted to be cross-offshore.

Time (EDT) & DateWave HeightWave Period
Morning (17 Sep)--
Afternoon (17 Sep)1.5ft (0.5m)7s
Evening (17 Sep)1.5ft (0.5m)7s

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


Short Range Forecast

Light rain (total 9mm), mostly falling on Thu night. Warm (max 25°C on Fri afternoon, min 10°C on Sat morning). Wind will be generally light.

Thu
17
Friday
18
Saturday
19
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
1
1
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
Wave
Height (m)
Direction
Period (s)
0.5
E
7
0.5
E
7
0.5
E
7
0.5
E
7
0.5
E
7
0.5
E
7
0.5
ESE
7
0.4
ESE
7
0.4
ESE
7
0.4
ESE
7
0.4
ESE
7
1.6
NE
6
1.7
NNE
6
1.2
NE
5
1.1
NE
6
1.1
NE
6
0.4
ESE
8
0.4
ESE
8
0.4
ESE
8
Wave Graph
Metric surfscale
Energy kJ
26
25
24
26
27
26
27
15
18
18
19
154
202
85
72
86
23
23
23
Wind (km/h)
10
SE
5
S
15
SSW
10
WSW
5
NNW
10
NNW
10
NNE
5
NNW
20
NNW
20
NNW
10
N
20
NNE
20
NNE
20
N
15
NE
15
E
15
SE
15
SSE
10
S
Wind State
cross-on
cross
cross-off
cross-off
cross-off
cross-off
cross
cross-off
cross-off
cross-off
cross
cross
cross
cross
cross-on
on
cross-on
cross-on
cross
High Tide
4:46PM2.30m
5:23AM1.98m
5:38PM2.23m
6:18AM1.92m
6:35PM2.19m
Low Tide
00:03AM0.27m
12:17PM0.55m
1:01AM0.36m
1:15PM0.61m
cloud
light rain
light rain
light rain
light rain
clear
clear
clear
clear
part cloud
clear
clear
clear
part cloud
clear
part cloud
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:24
6:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:50
6:47
6:45
 mm
3
4
1
1
Temp °C
22
21
20
19
19
19
22
23
25
20
16
14
11
10
12
13
13
13
14
Feels °C
23
23
20
20
21
20
22
22
21
15
13
9
5
5
8
9
8
9
11
  • 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.


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