Plum Island Surf Break

Lat Long: 42.80° N 70.81° W

Plum Island 48 hour detailed Surf Forecast

Issued: 7 pm 09 Aug 2026 (local time)

Forecast update in  hr  min

Today's Plum Island sea temperature is
21.8° C
2.0° 

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 (10 Aug):

  • Morning surf: Morning surf (10 Aug, local time) - 0.5ft (0.1m), 10s period with SE swell.
  • Afternoon surf: Afternoon surf (10 Aug, local time) - 0.5ft (0.2m), 7s period with SSE swell.
  • Evening surf: Evening surf (10 Aug, local time) - 1.5ft (0.5m), 3s period with SSE swell.

The current surf forecast for Plum Island at 4AM is: 0.1m 10s primary swell from a Southeast direction (forecast issued at 07:00pm August 09). The wind direction is predicted to be cross-offshore.

Time (EDT) & DateWave HeightWave Period
Morning (10 Aug)0.5ft (0.1m)10s
Afternoon (10 Aug)0.5ft (0.2m)7s
Evening (10 Aug)1.5ft (0.5m)3s

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


Short Range Forecast

Mostly dry. Warm (max 29°C on Tue afternoon, min 20°C on Tue night). Wind will be generally light.

Sun
9
Monday
10
Tuesday
11
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
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)
0.2
SSE
7
0.2
SSE
7
0.1
E
10
0.1
SE
7
0.1
SE
10
0.1
SE
10
0.1
SE
10
0.2
SSE
7
0.1
SE
10
0.5
SSE
3
0.6
S
4
0.1
SE
10
0.4
SSE
4
0.3
SSE
4
0.1
SE
9
0.1
SE
9
0.2
S
5
0.1
SE
9
0.1
SE
9
Wave Graph
Metric surfscale
Energy kJ
5
5
2
2
4
4
4
4
4
7
10
4
5
3
3
3
3
3
3
Wind (km/h)
20
W
15
WSW
10
W
10
WNW
10
NNW
5
WNW
10
SE
15
SE
15
SSE
15
SSE
10
SW
15
SW
15
SW
20
W
20
WNW
20
NW
15
NW
15
NW
10
NW
Wind State
off
off
off
cross-off
cross-off
off
cross-on
cross-on
cross
cross
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
9:13PM2.77m
9:57AM2.30m
10:16PM2.84m
10:59AM2.40m
Low Tide
3:28PM0.28m
4:23AM-0.07m
4:32PM0.20m
5:22AM-0.16m
5:32PM0.11m
clear
clear
clear
clear
clear
part cloud
cloud
cloud
cloud
cloud
clear
clear
clear
clear
clear
clear
clear
clear
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:43
5:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:53
7:52
7:51
 mm
Temp °C
31
28
25
25
22
22
25
27
26
25
24
22
22
23
27
29
29
25
22
Feels °C
28
27
24
24
22
22
24
25
25
24
24
22
22
22
25
25
26
23
20
  • 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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