Plum Island Surf Break

Lat Long: 42.80° N 70.81° W

Plum Island 48 hour detailed Surf Forecast

Issued: 1 pm 23 Sep 2026 (local time)

Forecast update in  hr  min

Today's Plum Island sea temperature is
16.4°C
0.0° 

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 (23 Sep):

  • Morning surf: Morning surf (23 Sep, local time) - 5.5ft (1.7m), 7s period with E swell.
  • Afternoon surf: Afternoon surf (23 Sep, local time) - 6ft (1.9m), 8s period with E swell.
  • Evening surf: Evening surf (23 Sep, local time) - 6ft (1.9m), 8s period with ESE swell.

The current surf forecast for Plum Island at 6PM is: 1.9m 8s primary swell from a East-southeast direction (forecast issued at 01:00pm September 23). The wind direction is predicted to be onshore.

Time (EDT) & DateWave HeightWave Period
Morning (23 Sep)5.5ft (1.7m)7s
Afternoon (23 Sep)6ft (1.9m)8s
Evening (23 Sep)6ft (1.9m)8s

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


Short Range Forecast

Heavy rain (total 21mm), heaviest during Fri night. Very mild (max 16°C on Fri afternoon, min 10°C on Thu morning). Winds increasing (light winds from the ENE on Thu night, strong winds from the NNE by Fri night).

Wed
23
Thursday
24
Friday
25
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
1
2
1
2
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)
1.8
E
7
1.9
E
7
1.9
ESE
8
1.9
ESE
8
1.9
ESE
8
1.9
ESE
9
1.8
ESE
9
2.1
E
9
2.3
ESE
10
2.4
ESE
10
2.4
ESE
10
2.3
ESE
11
2.3
ESE
11
2.4
ESE
11
2.5
ESE
11
2.5
ESE
12
2.5
ESE
12
3
ESE
12
3.5
E
12
4
E
12
4.5
E
11
Wave Graph
Metric surfscale
Energy kJ
294
392
461
497
522
560
549
792
959
1130
1249
1253
1300
1459
1684
1733
1863
2807
3291
3744
4687
Wind (km/h)
30
NE
25
ENE
20
ENE
15
ENE
20
NE
20
NE
20
NNE
25
NNE
25
NE
25
NE
20
ENE
15
ENE
15
NE
25
NNE
25
NNE
30
NNE
30
NNE
30
NE
35
NE
30
ENE
35
NE
Wind State
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
9:57AM2.18m
10:11PM2.42m
10:38AM2.32m
10:54PM2.50m
11:17AM2.46m
Low Tide
4:42PM0.37m
5:10AM0.20m
5:23PM0.24m
5:47AM0.12m
6:02PM0.11m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:31
6:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:38
6:37
6:36
 mm
2
Temp °C
13
13
13
13
13
12
11
10
12
12
13
13
13
12
12
11
14
15
16
15
13
Feels °C
8
8
9
10
9
8
7
5
7
7
9
10
10
7
7
5
8
9
9
9
7
  • 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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