Fortress surfForecast / Long Island NY / USA

information circle12 Day Weather and Surf, issued 1 am Friday 11 Jul 2025 EDT
Forecast update in hr  min  s Forecast update imminent
Fortress surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Fortress sea temperature is
21.6° C
(Which is slightly warmer than usual)


Best Forecast Surf Conditions for Fortress this week:

The surf forecast for Fortress over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Jul 17) at 11PM. The primary swell is predicted to be 1.6m and 7s period with a secondary swell of 0.1m and 16s. Another secondary swell of 0.1m and 16s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Fortress in the next 12 days are 1.6m 7s and forecast to arrive on Friday (Jul 18) 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 0.8m 4s period and expected on Tuesday (Jul 15) at 11PM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+)11PM (Thu 17th Jul)5ft (1.6m) 7s
Best Surf11PM (Thu 17th Jul)5ft (1.6m) 7s
Most Powerful 2AM (Fri 18th Jul)5ft (1.6m) 7s

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

Updates in  hr  min  s Forecast update imminent
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.7
S
0.8
SSE
0.9
SSE
0.8
SSE
0.7
S
0.7
S
0.6
S
0.5
S
0.6
ESE
0.6
ESE
0.4
ESE
0.5
ESE
0.4
ESE
0.3
ESE
0.7
SSW
0.6
SSW
1
S
1.1
S
1.1
S
1.5
S
1.6
SSW
1.5
S
1.9
SSW
1.6
SSW
1.1
S
1
S
1
S
1.2
SSW
1.6
SSW
1.8
SSW
1.6
SSW
1.6
SSW
1.2
S
0.9
S
0.8
S
0.8
S
Period(s) (?)678778775667664456677778777777887777
Wave
Graph
(?)Metric surfscale
Energy (?)5277115826689815839383735232526234899117222296271383318143123102161244349319469138888463
Wind
(km/h)
15
E
15
SSE
5
SE
15
ESE
20
ESE
20
ESE
15
ESE
20
SE
15
S
10
S
20
SSW
15
SW
15
SW
25
SSW
15
SW
20
SSW
25
SSW
25
SSW
20
SSW
25
SSW
25
SSW
25
SW
35
SSW
25
SW
15
WNW
15
W
20
ENE
20
E
15
SE
10
SSW
15
WSW
30
SW
25
NNE
10
E
15
SSE
25
SSE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
oncross-
on
cross-
on
ononononcross-
on
cross-
on
cross-
on
crosscross-
off
cross-
off
crosscross-
off
crosscrosscrosscrosscrosscrosscross-
off
crosscross-
off
offoffcross-
on
ononcrosscross-
off
cross-
off
crosscross-
on
cross-
on
cross-
on
High Tide
/ height (m)
8:57AM
0.72
9:03PM
0.92
9:36AM
0.75
9:40PM
0.92
10:16AM
0.79
10:20PM
0.90
10:56AM
0.82
11:02PM
0.86
11:40AM
0.85
11:49PM
0.82
12:27PM
0.87
12:39AM
0.77
1:20PM
0.89
1:36AM
0.72
2:19PM
0.91
2:40AM
0.68
3:28PM
0.92
3:56AM
0.66
4:43PM
0.95
5:16AM
0.68
5:54PM
0.98
6:25AM
0.72
6:55PM
1.01
Low Tide
/ height (m)
2:17PM
0.09
3:13AM
-0.00
3:02PM
0.08
3:50AM
-0.02
3:49PM
0.07
4:28AM
-0.02
4:38PM
0.08
5:09AM
-0.01
5:31PM
0.10
5:52AM
0.01
6:31PM
0.12
6:40AM
0.03
7:39PM
0.14
7:34AM
0.05
8:59PM
0.14
8:34AM
0.06
10:18PM
0.11
9:40AM
0.07
11:25PM
0.07
10:46AM
0.05
12:22AM
0.03
11:48AM
0.02
1:13AM
-0.01
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
Sunrise5:24--5:24--5:26--5:26--5:28--5:28--5:28--5:30--5:31--5:31--5:33--5:33--
Sunset-8:21--8:20--8:20--8:19--8:17--8:17--8:16--8:15--8:15--8:15--8:14--8:13-
part cloudclearclearclearclearclearclearclearclearclearclearrain showerspart cloudclearclearclearclearclearclearclearclearthunderstorm clearrain showersrain showerspart cloudpart cloudclearclearclearclearclearclearclearpart cloudrain showers
Rain (mm)
-----------1---------1-71----------1
Temp. °C192121212020202121212323242424242524252625242424242823222223252726192121
Feels °C (?)192121211920202122232323252524262525262626252221262823222125262624161818

Short Range Forecast: Mostly dry. Warm (max 21°C on Fri afternoon, min 19°C on Fri morning). Wind will be generally light.

Days 3-6 Weather Summary Some drizzle, heaviest during Mon night. Warm (max 25°C on Wed afternoon, min 21°C on Mon morning). Wind will be generally light.

Days 6-9 Weather Summary Light rain (total 9mm), mostly falling on Fri night. Warm (max 28°C on Sat afternoon, min 22°C on Sat night). Winds decreasing (strong winds from the SSW on Fri night, light winds from the W by Sat afternoon).

Long Range Forecast: Light rain (total 4mm), mostly falling on Wed morning. Warm (max 27°C on Mon afternoon, min 18°C on Tue morning). Mainly fresh winds.

  • 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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Information about the Fortress Surf forecast

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

Fortress is 39 km (24 miles) from New London. If you plan a vacation in Long Island New York, look for hotels and other accommodation in New London. New London has rooms for a wide range of budgets as well as car hire and transport links.

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