Fortress surfForecast / Long Island NY / USA

information circle12 Day Weather and Surf, issued 6 am Monday 12 Jan 2026 EST
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
4.0° C
(Which is 2.5°C colder than average for this time of year)


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 (Jan 15) at 4AM. The primary swell is predicted to be 1.1m and 7s period with a secondary swell of 0.3m and 9s. Another secondary swell of 0.2m and 10s 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 1.9m 8s and forecast to arrive on Wednesday (Jan 14) 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 1.5m 5s period and expected on Friday (Jan 16) at 10AM.

Wave TypeTime (EST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Thu 15th Jan)3.5ft (1.1m) 7s
Best Surf 4AM (Thu 15th Jan)3.5ft (1.1m) 7s
Most Powerful10AM (Wed 14th Jan)6ft (1.9m) 8s

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

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Icy conditions (max 8°C on Tue night, min 0°C on Mon morning). Winds decreasing (strong winds from the SSW on Tue night, light winds from the SW by Wed night).

Days 3-6 Weather Summary Mostly dry. Icy conditions (max 6°C on Thu morning, min -4°C on Thu night). Winds decreasing (near gales from the WNW on Fri morning, light winds from the S by Sat night).

Monday
12
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
1
0
Swell
Height Map
Wave Height (m) & direction (?)
0.5
S
0.4
S
1.2
SW
0.9
SW
0.1
SE
1.7
SSW
1.9
SSW
1.1
S
1.1
S
1.2
S
1.6
SSW
1.2
SSW
1.3
SSW
1
SSW
0.8
SW
1.2
SSW
1.1
SSW
1.1
S
1
S
1.1
S
0.9
SSW
Period(s) (?)997687877778887677788
Wave
Graph
(?)Metric surfscale
Energy kJ (?)36241287032473891241131352191782461346011412512010815381
Wind
(km/h)
40
WNW
35
WSW
30
WSW
25
WSW
30
SW
40
SW
25
SW
20
SSW
15
SSW
25
SW
30
WSW
35
W
55
WNW
40
WNW
35
SW
35
WSW
20
SW
25
SW
25
WSW
20
WNW
30
N
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offcross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
crosscrosscross-
off
cross-
off
offoffoffcross-
off
cross-
off
cross-
off
cross-
off
cross-
off
offcross-
off
High Tide
/ height (m)
2:11PM
0.46
3:40AM
0.68
3:43PM
0.46
4:40AM
0.69
4:58PM
0.48
5:31AM
0.71
5:51PM
0.52
6:14AM
0.74
6:36PM
0.56
6:52AM
0.76
7:15PM
0.61
7:24AM
0.78
7:51PM
0.65
Low Tide
/ height (m)
7:58PM
0.13
10:02AM
0.15
8:59PM
0.13
10:51AM
0.12
9:59PM
0.12
11:34AM
0.08
10:52PM
0.09
12:12PM
0.03
11:40PM
0.06
12:47PM
-0.02
12:24AM
0.03
1:21PM
-0.05
1:06AM
0.01
Monday
12
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
Sunrise7:11--7:11--7:11--7:09--7:09--7:09--7:09--
Sunset-4:39--4:40--4:42--4:43--4:44--4:45--4:46-
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
cloud
part cloud
cloud
clear
part cloud
cloud
part cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
part cloud
Rain (mm)
---------------------
Temp. °C144468677651-20545632-1
Feels °C (?)-9-6-6-4-2-1-1230-3-9-15-11-6-5-33-4-5-8
  • 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

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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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