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Surf Forecasts:

Cupsogue surfForecast / Long Island NY / USA

information circle12 Day Weather and Surf, issued 6 am Thursday 20 Nov 2025 EST
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
12.4° 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 Wednesday (Nov 26) at 4AM. The primary swell is predicted to be 0.9m and 5s period with a secondary swell of 0.3m and 8s. 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 1.8m 8s and forecast to arrive on Thursday (Nov 27) at 10AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Thursday (Nov 27) at 1PM.

Wave TypeTime (EST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Wed 26th Nov)3ft (0.9m) 5s
Best Surf 4AM (Wed 26th Nov)3ft (0.9m) 5s
Most Powerful10AM (Thu 27th Nov)6ft (1.8m) 8s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Moderate rain (total 16mm), heaviest on Fri night. Very mild (max 11°C on Fri afternoon, min 4°C on Sat night). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 8mm), mostly falling on Tue night. Very mild (max 14°C on Tue night, min 4°C on Sun morning). Winds increasing (calm on Mon night, strong winds from the S by Tue afternoon).

Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.4
S
0.3
S
0.2
S
0.2
SSW
0.5
SSW
0.6
S
0.4
SE
0.5
S
0.6
S
0.4
SSW
0.4
S
0.2
S
0.2
S
0.2
SSE
0.3
SE
0.3
SE
1.1
S
1
S
0.7
S
0.8
S
1.3
SSE
Period(s) (?)766544568776699955567
Wave
Graph
(?)Metric surfscale
Energy kJ (?)14733814619451815338121259502543157
Wind
(km/h)
10
NE
5
E
5
WSW
25
SW
25
SW
10
SW
25
N
25
NNW
25
N
10
NW
20
WNW
25
W
20
NNW
15
NW
5
ENE
25
SSE
40
SSE
20
SW
10
S
20
SSW
45
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crossglasscross-
off		crosscrosscrosscross-
off		offcross-
off		offoffcross-
off		cross-
off		offglasscross-
on		cross-
on		crosscross-
on		cross-
on		cross
High Tide
/ height (m)
7:29PM
0.82
7:45AM
1.04
8:10PM
0.80
8:25AM
1.02
8:52PM
0.77
9:06AM
0.99
9:36PM
0.75
9:49AM
0.95
10:21PM
0.74
10:33AM
0.91
11:09PM
0.73
11:22AM
0.88
12:02AM
0.75
Low Tide
/ height (m)
1:00PM
0.05
12:46AM
0.05
1:33PM
0.04
1:23AM
0.04
2:09PM
0.03
2:02AM
0.05
2:47PM
0.04
2:43AM
0.07
3:29PM
0.05
3:28AM
0.09
4:14PM
0.06
4:19AM
0.12
5:03PM
0.06
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Sunrise6:43--6:43--6:45--6:46--6:47--6:48--6:48--
Sunset-4:29--4:28--4:27--4:27--4:25--4:25--4:24-
cloud
clear
part cloud
part cloud
part cloud
heavy rain
light rain
clear
part cloud
clear
clear
clear
clear
part cloud
cloud
cloud
light rain
light rain
mod rain
mod rain
rain showers
Rain (mm)
-----124---------447710
Temp. °C669101111986688899101214141516
Feels °C (?)33556731-102324444121399
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Latest Updates

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Quiksilver Teams Up With PrimaLoft® For World’s First Thermal Layering System for a Wetsuit.

Feel that? If you are in the northern hemisphere, you will have had that first bite of winter. The lick of a frost, the chill of a cold offshore breeze and the sound of winter swells pounding the shores. If you are near the mountains, your favourite jackets, gloves, and footwear might get dusted off and prepped for battle. And in that beautiful Venn diagram, you will find PrimaLoft. They have spent over 40 years developing innovative insulations that have powered your warmest winter gear. In t

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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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