Plum Island Surf Break

Lat Long: 42.80° N 70.81° W

Plum Island 48 hour detailed Surf Forecast

Issued: 7 am 12 Sep 2026 (local time)

Forecast update in  hr  min

Today's Plum Island sea temperature is
18.2°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 (12 Sep):

  • Morning surf: Morning surf (12 Sep, local time) - 1ft (0.3m), 10s period with SE swell.
  • Afternoon surf: Afternoon surf (12 Sep, local time) - 0.5ft (0.2m), 10s period with ESE swell.
  • Evening surf: Evening surf (12 Sep, local time) - 3.5ft (1.0m), 4s period with SSE swell.

The current surf forecast for Plum Island at 2PM is: 0.2m 10s primary swell from a East-southeast direction (forecast issued at 07:00am September 12). The wind direction is predicted to be cross-onshore.

Time (EDT) & DateWave HeightWave Period
Morning (12 Sep)1ft (0.3m)10s
Afternoon (12 Sep)0.5ft (0.2m)10s
Evening (12 Sep)3.5ft (1.0m)4s

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


Short Range Forecast

Heavy rain (total 20mm), heaviest during Sun afternoon. Warm (max 21°C on Sat night, min 13°C on Mon night). Wind will be generally light.

Saturday
12
Sunday
13
Monday
14
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
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
1
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
Height Map
Wave
Height (m)
Direction
Period (s)
0.3
SE
11
0.3
SE
10
0.2
ESE
10
0.2
ESE
10
0.2
ESE
10
1
SSE
4
0.9
S
4
0.3
SE
10
0.3
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.6
SE
9
0.6
SE
8
0.8
ESE
8
0.7
SE
7
0.6
SE
7
0.6
ESE
7
Wave Graph
Metric surfscale
Energy kJ
18
14
9
9
9
34
31
16
15
25
24
24
31
31
22
21
29
50
51
72
56
42
36
Wind (km/h)
5
W
0
NW
10
SE
20
SE
20
SSE
20
S
15
SSW
10
SSW
10
SSW
10
SSW
5
S
10
ESE
10
ENE
5
W
10
SW
15
SW
25
NW
15
WNW
20
NNW
10
N
10
NNW
10
NNW
20
NNE
Wind State
glassy
glassy
cross-on
cross-on
cross-on
cross
cross-off
cross-off
cross-off
cross-off
cross
cross-on
on
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-off
cross-off
cross
High Tide
1:14PM2.65m
1:36AM2.63m
1:55PM2.63m
2:19AM2.50m
2:36PM2.56m
Low Tide
7:32AM-0.18m
7:54PM-0.17m
8:16AM-0.11m
8:41PM-0.15m
8:59AM0.00m
9:28PM-0.08m
clear
clear
clear
clear
clear
clear
part cloud
clear
cloud
cloud
light rain
heavy rain
cloud
cloud
clear
clear
cloud
light rain
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:18
6:20
6:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:59
6:57
6:54
 mm
4
11
5
Temp °C
16
15
19
20
19
21
18
18
18
18
18
18
18
18
19
19
19
17
20
21
21
18
16
Feels °C
15
15
17
16
15
18
16
17
17
18
19
19
19
20
20
20
16
16
16
19
18
15
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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