Plum Island Surf Break

Lat Long: 42.80° N 70.81° W

Plum Island 48 hour detailed Surf Forecast

Issued: 7 pm 19 Aug 2026 (local time)

Forecast update in  hr  min

Today's Plum Island sea temperature is
19.3° C
0.2° 

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 (20 Aug):

  • Afternoon surf: Afternoon surf (20 Aug, local time) - 2ft (0.6m), 7s period with SE swell.
  • Evening surf: Evening surf (20 Aug, local time) - 2.5ft (0.7m), 6s period with SE swell.

The current surf forecast for Plum Island at 12AM is: 0.8m 6s primary swell from a Southeast direction and 0.4m 8s secondary swell from a Southeast direction (forecast issued at 07:00pm August 19). The wind direction is predicted to be offshore.

Time (EDT) & DateWave HeightWave Period
Morning (20 Aug)--
Afternoon (20 Aug)2ft (0.6m)7s
Evening (20 Aug)2.5ft (0.7m)6s

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


Short Range Forecast

Moderate rain (total 13mm), heaviest on Sat afternoon. Warm (max 27°C on Wed night, min 16°C on Sat afternoon). Wind will be generally light.

Wed
19
Thursday
20
Friday
21
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)
1
0
1
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
Wave
Height (m)
Direction
Period (s)
0.8
SE
7
0.7
SE
6
0.8
SE
6
0.7
SE
6
0.5
SE
8
0.6
SE
8
0.6
SE
8
0.6
ESE
7
0.6
ESE
7
0.6
ESE
7
0.6
ESE
8
0.5
ESE
8
0.5
SE
8
0.4
ESE
8
0.5
ESE
8
0.5
ESE
8
0.5
ESE
8
0.5
ESE
8
0.5
ESE
8
Wave Graph
Metric surfscale
Energy kJ
52
39
45
36
32
50
46
37
35
34
39
38
35
28
39
38
38
37
36
Wind (km/h)
10
WSW
10
WSW
5
W
10
WSW
10
W
10
WNW
5
NE
10
ESE
5
S
10
WSW
10
W
15
NW
15
NNW
15
N
10
NE
15
E
15
ESE
10
SSE
5
S
Wind State
off
off
off
off
off
cross-off
glassy
cross-on
cross
cross-off
off
cross-off
cross-off
cross
cross-on
on
cross-on
cross
cross
High Tide
5:30PM2.31m
6:04AM2.00m
6:23PM2.24m
7:03AM1.92m
7:20PM2.21m
Low Tide
00:40AM0.21m
12:55PM0.42m
1:38AM0.27m
1:53PM0.50m
clear
clear
part cloud
clear
clear
clear
part cloud
part cloud
cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:54
5:54
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:38
7:37
7:36
 mm
Temp °C
28
27
24
22
21
21
25
25
25
23
22
20
19
18
21
22
22
21
20
Feels °C
27
26
24
22
21
21
25
24
25
21
20
17
17
16
19
18
18
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.


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