Plum Island Surf Break

Lat Long: 42.80° N 70.81° W

Plum Island 48 hour detailed Surf Forecast

Issued: 1 pm 30 Sep 2026 (local time)

Forecast update in  hr  min

Today's Plum Island sea temperature is
15.2°C
0.1° 

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 (30 Sep):

  • Morning surf: Morning surf (30 Sep, local time) - 3ft (0.9m), 9s period with E swell.
  • Afternoon surf: Afternoon surf (30 Sep, local time) - 2.5ft (0.8m), 9s period with E swell.
  • Evening surf: Evening surf (30 Sep, local time) - 2.5ft (0.7m), 8s period with E swell.

The current surf forecast for Plum Island at 7PM is: 0.8m 8s primary swell from a East direction and 0.2m 13s secondary swell from a East-southeast direction, 0.4m 3s secondary swell from a South-southeast direction (forecast issued at 01:00pm September 30). The wind direction is predicted to be cross-shore.

Time (EDT) & DateWave HeightWave Period
Morning (30 Sep)3ft (0.9m)9s
Afternoon (30 Sep)2.5ft (0.8m)9s
Evening (30 Sep)2.5ft (0.7m)8s

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


Short Range Forecast

Mostly dry. Warm (max 28°C on Fri afternoon, min 12°C on Sat morning). Wind will be generally light.

Wed
30
Thursday
1
Friday
2
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)
1
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
0
1
1
1
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)
0.9
E
9
0.9
E
9
0.8
E
8
0.7
E
8
0.7
E
8
0.7
E
8
0.7
E
8
0.4
SE
12
0.4
SE
12
0.4
SE
12
0.4
SE
12
0.4
SE
12
0.4
SE
12
0.4
SE
12
0.4
SE
12
0.4
ESE
12
0.4
ESE
12
0.4
ESE
12
0.5
E
12
0.5
E
11
0.5
E
11
Wave Graph
Metric surfscale
Energy kJ
120
119
92
69
69
71
69
50
50
36
35
36
36
36
36
55
54
53
69
64
61
Wind (km/h)
5
SW
10
S
15
S
10
S
10
SW
10
WSW
10
SW
5
WSW
10
SW
10
WSW
20
SW
20
SW
20
SW
20
SW
20
SW
20
SW
20
SW
20
WSW
20
WNW
15
WNW
20
WNW
Wind State
glassy
cross
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
off
off
cross-off
High Tide
2:44PM2.84m
3:18AM2.46m
3:34PM2.80m
4:11AM2.36m
4:29PM2.73m
Low Tide
8:53AM0.08m
9:34PM-0.15m
9:41AM0.17m
10:31PM-0.07m
10:39AM0.29m
clear
part cloud
part cloud
clear
cloud
part cloud
cloud
cloud
clear
cloud
part cloud
cloud
part cloud
clear
cloud
clear
part cloud
cloud
cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
—
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—
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6:39
—
—
—
—
—
—
—
6:41
—
—
—
—
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
—
—
6:27
—
—
—
—
—
—
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6:24
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—
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6:22
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 mm
—
—
—
—
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—
—
—
—
—
—
—
—
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—
—
—
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—
—
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Temp °C
17
19
19
18
18
17
16
17
21
24
23
20
20
19
19
20
25
28
25
21
20
Feels °C
17
18
17
17
18
16
15
17
21
24
21
18
18
17
17
18
22
25
24
20
18
  • 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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