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Surf Forecasts:

Cupsogue surfForecast / Long Island NY / USA

information circle12 Day Weather and Surf, issued 6 pm Wednesday 14 Jan 2026 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
4.0° C
 (Which is 2.5°C colder than average for this time of year)

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 Sunday (Jan 18) at 4AM. The primary swell is predicted to be 1.2m and 8s period. 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 2.4m 8s and forecast to arrive on Saturday (Jan 17) at 7PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Monday (Jan 19) at 4AM.

Wave TypeTime (EST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Sun 18th Jan)4ft (1.2m) 8s
Best Surf 4AM (Sun 18th Jan)4ft (1.2m) 8s
Most Powerful 7PM (Sat 17th Jan)8ft (2.4m) 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 A dusting of snow on Fri night. Freezing level rising with drizzle on Sat morning. Icy conditions (max 8°C on Wed afternoon, min -5°C on Thu night). Winds increasing (light winds from the S on Wed afternoon, strong winds from the W by Thu night).

Days 3-6 Weather Summary A moderate fall of snow, heaviest on Sun afternoon. Icy conditions (max 5°C on Sat afternoon, min -6°C on Mon night). Winds increasing (light winds from the SW on Sat night, strong winds from the WSW by Mon morning).

Wed
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
0
0
0
0
0
0
1
1
1
1
1
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.3
SSW
1.3
S
1.5
S
1.6
S
1.5
SSW
1
SSW
1.1
SW
1.5
SSW
1.6
SSW
1.9
SSW
1.4
S
1.1
S
0.9
S
0.5
SE
0.4
SE
1
SW
0.8
SSW
0.5
SSW
0.4
SE
0.5
SE
0.5
SE
Period(s) (?)77888877888888867610910
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1611492493242531401222063504682711611003217785623324148
Wind
(km/h)
15
S
25
SSW
35
WSW
40
WSW
35
WNW
40
W
30
WSW
35
SW
15
SW
25
WSW
10
SW
15
NW
20
NNW
30
NW
35
W
40
W
30
W
25
W
25
W
35
W
35
WNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		cross-
on		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		crosscrosscross-
off		crossoffoffoffcross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		off
High Tide
/ height (m)
4:27PM
0.63
4:51AM
0.87
5:15PM
0.66
5:35AM
0.91
6:00PM
0.69
6:18AM
0.94
6:43PM
0.73
7:00AM
0.97
7:25PM
0.76
7:41AM
0.98
8:07PM
0.80
8:22AM
0.98
8:48PM
0.83
9:03AM
0.96
Low Tide
/ height (m)
9:31PM
0.09
11:09AM
0.11
10:23PM
0.07
11:47AM
0.06
11:14PM
0.03
12:21PM
0.01
12:00AM
-0.01
12:54PM
-0.04
12:44AM
-0.04
1:29PM
-0.08
1:27AM
-0.07
2:05PM
-0.11
2:10AM
-0.09
Wed
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
Sunrise--7:11--7:11--7:11--7:11--7:11--7:09--7:09
Sunset4:45--4:46--4:47--4:49--4:50--4:52--4:52--
cloud
part cloud
part cloud
clear
part cloud
part cloud
clear
snow showers
rain showers
part cloud
cloud
light snow
mod snow
snow showers
part cloud
clear
clear
cloud
clear
part cloud
part cloud
Rain (mm)
--------1------------
Temp. °C8852-2-2255552-1-2-3-2-2-6-5-5-9
Feels °C (?)41-4-9-13-12-7-4-1-20-4-7-10-14-13-12-14-13-15-20
  • 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

Latest Updates

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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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