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Surf Forecasts:

Cupsogue surfForecast / Long Island NY / USA

information circle12 Day Weather and Surf, issued 7 am Tuesday 02 Sep 2025 EDT
Forecast update in hr  min  s Forecast update imminent
Cupsogue surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Cupsogue sea temperature is
21.6° C
 (Which is slightly warmer than usual)

Best Forecast Surf Conditions for Cupsogue this week:

The surf forecast for Cupsogue over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 06) at 8PM. The primary swell is predicted to be 1.2m and 6s period with a secondary swell of 1.0m and 6s. Another secondary swell of 0.3m and 9s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Cupsogue in the next 12 days are 1.5m 7s and forecast to arrive on Saturday (Sep 06) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 8s period and expected on Tuesday (Sep 02) at 8PM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Sat 6th Sep)4ft (1.2m) 6s
Best Surf 8PM (Sat 6th Sep)4ft (1.2m) 6s
Most Powerful 8AM (Sat 6th Sep)5ft (1.5m) 7s

Table - best surf conditions forecast for Cupsogue over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
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Short Range Forecast Some drizzle, heaviest during Thu night. Warm (max 21°C on Thu afternoon, min 17°C on Wed morning). Winds increasing (calm on Tue night, fresh winds from the S by Thu night).

Days 3-6 Weather Summary Light rain (total 2mm), mostly falling on Sat night. Warm (max 24°C on Sat afternoon, min 17°C on Sun morning). Winds decreasing (strong winds from the SSW on Fri night, light winds from the NNW by Sun morning).

Tuesday
02
Wednesday
03
Thursday
04
Friday
05
Saturday
06
Sunday
07
Monday
08
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.4
SE
0.9
ESE
1
ESE
0.9
ESE
0.9
ESE
0.8
ESE
0.1
S
0.4
S
1
S
1.1
S
1.3
S
1.3
S
1.4
S
1.3
S
0.9
S
0.8
S
0.8
S
0.6
S
0.5
SSE
0.5
S
0.3
S
Period(s) (?)888887535666776666666
Wave
Graph
(?)Metric surfscale
Energy (?)21000001655951271452782597463864433176
Wind
(km/h)
20
E
15
ESE
5
SE
10
ESE
15
S
10
SW
15
S
25
S
30
SSW
20
SSW
35
S
35
SSW
20
SSW
25
SW
15
NW
10
WNW
20
SW
15
N
10
NW
15
S
5
WSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		cross-
on		glassoncross-
on		crosscross-
on		cross-
on		cross-
on		crosscross-
on		crosscross-
on		crossoffcross-
off		crosscross-
off		offcross-
on		cross-
off
High Tide
/ height (m)
4:11PM
0.94
4:42AM
0.78
5:05PM
0.99
5:33AM
0.85
5:54PM
1.05
6:20AM
0.93
6:39PM
1.10
7:04AM
1.01
7:23PM
1.15
7:48AM
1.09
8:08PM
1.17
8:32AM
1.16
8:53PM
1.17
Low Tide
/ height (m)
8:41AM
0.27
9:44PM
0.29
9:42AM
0.25
10:45PM
0.24
10:44AM
0.20
11:40PM
0.17
11:43AM
0.14
12:27AM
0.09
12:36PM
0.06
1:10AM
0.02
1:25PM
0.00
1:52AM
-0.03
2:12PM
-0.04
2:34AM
-0.07
Tuesday
02
Wednesday
03
Thursday
04
Friday
05
Saturday
06
Sunday
07
Monday
08
Sunrise6:18--6:18--6:20--6:20--6:22--6:22--6:24--
Sunset-7:22--7:20--7:17--7:16--7:15--7:14--7:12-
clear
part cloud
part cloud
clear
clear
clear
clear
clear
rain showers
clear
clear
clear
part cloud
part cloud
rain showers
clear
part cloud
part cloud
clear
clear
part cloud
Rain (mm)
--------1-----2------
Temp. °C191919192019202121222223232424212221202120
Feels °C (?)171718181817211918212119232323171716171916
  • 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

Eyeball surf reportRecent Eyeball Surf Reports for Long Island NY

  1. weather stationWind Update Recent cross-shore wind 11 km from Cupsogue has fallen light (light winds from the E at Westhampton Beach/Francis S. Gabreski Airport). Waves should be turning clean at Cupsogue. No surfable waves

    1 hour 47 minutes ago Cupsogue
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1 h 47 min ago

7 km/h
E
Clean
Please reload the page to see if there are any updates.

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 Cupsogue 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.

View detailed surf forecast for Cupsogue at:
surf-forecast.com

Information about the Cupsogue Surf forecast

The above surf forecast table for Cupsogue provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Cupsogue can be found by selecting the local surf guide option on the grey menu. Our Cupsogue surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Cupsogue) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Cupsogue may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Cupsogue is 12 km (7 miles) from Mastic. If you plan a vacation in Long Island New York, look for hotels and other accommodation in Mastic. Mastic has rooms for a wide range of budgets as well as car hire and transport links.

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