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Surf Forecasts:

Gilgo surfForecast / Long Island NY / USA

information circle12 Day Weather and Surf, issued 1 pm Tuesday 16 Sep 2025 EDT
Forecast update in hr  min  s Forecast update imminent
Gilgo surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Gilgo sea temperature is
21.7° C
 (Which is 1.5°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Gilgo this week:

The surf forecast for Gilgo over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 18) at 11AM. The primary swell is predicted to be 1.0m and 7s period with a secondary swell of 0.3m and 6s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Gilgo in the next 12 days are 1.7m 8s and forecast to arrive on Wednesday (Sep 17) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Saturday (Sep 20) at 2AM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+)11AM (Thu 18th Sep)3.5ft (1.0m) 7s
Best Surf 2AM (Tue 23rd Sep)3.5ft (1.0m) 11s
Most Powerful 2AM (Wed 17th Sep)5.5ft (1.7m) 8s

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

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

Short Range Forecast Light rain (total 5mm), mostly falling on Wed morning. Warm (max 24°C on Fri morning, min 18°C on Tue night). Winds decreasing (fresh winds from the E on Tue afternoon, calm by Thu afternoon).

Days 3-6 Weather Summary Mostly dry. Warm (max 27°C on Fri afternoon, min 15°C on Sat morning). Winds decreasing (fresh winds from the NE on Fri night, light winds from the ESE by Sun night).

Tue
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
2
2
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.6
ESE
1.7
ESE
1.7
ESE
1.5
ESE
1.5
ESE
1
ESE
0.8
ESE
0.7
SE
0.5
ESE
0.5
ESE
0.4
ESE
1
E
1
E
0.8
ESE
0.4
SE
0.6
SE
0.7
SE
0.6
SE
0.6
SE
1
SE
1
SE
Period(s) (?)8887777888866614141312121110
Wave
Graph
(?)Metric surfscale
Energy kJ (?)31531931023421296706035332264815066118166116110229196
Wind
(km/h)
30
E
25
E
30
ENE
25
E
15
ENE
10
NE
5
SSW
15
WSW
15
NW
15
N
30
NE
20
ENE
20
ESE
15
ESE
20
ESE
15
ESE
10
ESE
10
E
15
ESE
10
NE
5
WNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscrosscrosscrosscrosscross-
off		cross-
on		crosscross-
off		cross-
off		cross-
off		crosscross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
off		glass
High Tide
/ height (m)
3:33PM
1.37
4:15AM
1.17
4:38PM
1.39
5:17AM
1.24
5:35PM
1.42
6:09AM
1.32
6:24PM
1.45
6:55AM
1.39
7:07PM
1.46
7:35AM
1.44
7:46PM
1.44
8:13AM
1.46
8:23PM
1.40
8:50AM
1.46
Low Tide
/ height (m)
10:17PM
0.14
10:18AM
0.19
11:11PM
0.08
11:13AM
0.14
11:58PM
0.03
12:04PM
0.09
12:42AM
-0.00
12:52PM
0.06
1:23AM
-0.02
1:36PM
0.05
2:00AM
-0.01
2:18PM
0.05
2:36AM
0.02
Tue
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Sunrise--6:35--6:35--6:37--6:37--6:39--6:39--6:41
Sunset7:00--6:59--6:58--6:55--6:53--6:52--6:51--
cloud
part cloud
light rain
light rain
light rain
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
clear
Rain (mm)
--221----------------
Temp. °C211919202020232224272417181717171719201920
Feels °C (?)161416172020242221252012131313131619191920
  • 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 The wind is still cross-off at Gilgo (moderate winds from the NE at Farmingdale Airport 13 km from Gilgo). A 1.8m swell from the ESE

    2 hours 24 minutes ago Gilgo
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2 h 24 min ago

22 km/h
NE
Cross-Off
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 Gilgo 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 Gilgo at:
surf-forecast.com

Information about the Gilgo Surf forecast

The above surf forecast table for Gilgo provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Gilgo can be found by selecting the local surf guide option on the grey menu. Our Gilgo 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 (Gilgo) 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 Gilgo 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.

Gilgo is 7 km (4 miles) from Copiague. If you plan a vacation in Long Island New York, look for hotels and other accommodation in Copiague. Copiague has rooms for a wide range of budgets as well as car hire and transport links.

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