Surf Forecasts:
Fortress surf forecast from 3 Sep 2026:
- Most powerful swell: Thursday 10 Sep, 5AM (local time) - 6ft (1.9m), 7s period, SSW swell with 335 kJ wave energy.
Best Forecast Surf Conditions for Fortress this week:
The most powerful waves expected at Fortress in the next 16 days are 1.9m 7s and forecast to arrive on Thursday (Sep 10) at 5AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Wednesday (Sep 09) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Thu 10th Sep) | 6ft (1.9m) 7s |
Table - best surf conditions forecast for Fortress over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about the Fortress.
First off, I gotta be straight with you – it’s a tough stretch ahead. We’re looking at a solid 15 days of pretty much nothing worth paddling out for. The first real sign of life doesn’t show up until Thursday the 18th, and even then it’s just a whisper of a wave. The forecast is basically a flat spell with a few little bumps, but nothing that’s going to get your heart racing.
The water temp is sitting at 70°, which is about normal for this time of year, so no surprises there.
Now, that Thursday morning on the 18th... we’ve got a small 1ft swell rolling in from the SE, with a long period of 12 seconds. That’s a proper groundswell, so it’s got some push and will wrap in nicely. The wind is offshore from the WNW at 12 mph, so the faces should be clean. The combined swell energy is only 54 (weak), so it’s not going to be pumping, but it’s the best we’ve got. This is a reef break, and with that long period, it’s a good setup for a point or reef, but at 1ft it’s really only going to be knee-high, maybe waist-high on the sets. It’s a beginner-friendly spot, rated 2/5, and it’s fairly consistent. Because it’s a reef, long period swells can sometimes break a bit too straight here, but with these small waves, it’ll be fine. Crowds are likely, though, as it’s often busy.
The afternoon of the 18th looks similar: 1ft, same SE direction, 12-second period, offshore wind from the W at 16 mph. Clean again, but still tiny. The energy is 55 (weak). It’s not a standout, just the only option.
Honestly, if you’re desperate for a paddle, the 18th morning is your best bet. But for 16 days, this is a real desert. The surf is just not happening. With the wind picking up strong through the middle of the week, it’s more of a kite-surfing setup than a paddling one. Hang in there, though – forecasts can change.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Thu morning. Warm (max 27°C on Fri night, min 16°C on Sat night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Mon afternoon, min 16°C on Sun morning). Wind will be generally light. | ||||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | SE 9 | SE 9 | SE 8 | ESE 8 | SE 8 | SE 8 | SE 8 | SE 8 | ENE 5 | ENE 5 | E 6 | ESE 11 | ESE 10 | ESE 10 | E 10 | E 9 | E 9 | ESE 4 | SSE 4 | S 5 | SSW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 39 | 27 | 34 | 26 | 16 | 10 | 14 | 15 | 40 | 36 | 24 | 40 | 36 | 34 | 18 | 7 | 15 | 12 | 23 | 51 | 249 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | off | cross-off | cross-off | cross-off | cross-on | cross | cross | cross-on | cross-off | cross-off | cross-off | off | cross | cross-on | cross-on | cross | cross | cross-off |
High Tide | 12:41PM0.91m | 1:10AM0.68m | 1:47PM0.89m | 2:24AM0.66m | 3:10PM0.89m | 3:53AM0.69m | 4:36PM0.91m | 5:11AM0.75m | 5:44PM0.94m | 6:12AM0.83m | 6:39PM0.98m | 7:03AM0.91m | 7:27PM0.99m | ||||||||
Low Tide | 7:14PM0.16m | 6:57AM0.12m | 8:42PM0.18m | 8:08AM0.14m | 10:06PM0.15m | 9:29AM0.13m | 11:08PM0.10m | 10:47AM0.09m | 11:59PM0.04m | 11:51AM0.04m | 00:44AM-0.01m | 12:46PM-0.02m | 1:24AM-0.04m | ||||||||
 |  |  |  |  |  | | |  | | | | | |  | | | | |  |  | |
 | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — |
 | — | 7:16 | — | — | 7:15 | — | — | 7:14 | — | — | 7:12 | — | — | 7:10 | — | — | 7:08 | — | — | 7:07 | — |
mm | 2 | 2 | 2 | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | 12 |
Temp °C | 23 | 24 | 24 | 23 | 25 | 27 | 21 | 22 | 20 | 18 | 20 | 20 | 19 | 23 | 22 | 20 | 21 | 21 | 22 | 22 | 21 |
Feels °C | 24 | 24 | 25 | 25 | 26 | 28 | 19 | 22 | 17 | 14 | 17 | 18 | 16 | 19 | 17 | 17 | 19 | 19 | 19 | 19 | 16 |
Swell 1 Height (m) Direction Period (s) | SE 6 | SE 5 | SE 8 | ESE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SSW 7 | SSW 6 | E 6 | ESE 11 | ESE 10 | ESE 10 | E 10 | SSW 5 | SSW 5 | SE 9 | E 10 | ESE 10 | SE 9 |
| kJ | 30 | 14 | 34 | 26 | 16 | 10 | 14 | 15 | 15 | 8 | 24 | 40 | 36 | 34 | 18 | 2 | 2 | 3 | 2 | 9 | 13 |
Swell 2 Height (m) Direction Period (s) | SE 9 | SE 9 | S 4 | SSW 4 | ESE 6 | ESE 6 | SSW 6 | SSW 6 | ESE 8 | SE 9 | SSW 6 | ENE 5 | SSW 5 | SE 8 | SE 8 | E 9 | SE 9 | E 9 | E 8 | E 9 | E 9 |
| kJ | 39 | 27 | 6 | 6 | 8 | 8 | 6 | 3 | 6 | 3 | 7 | 8 | 3 | 3 | 3 | 7 | 3 | 1 | 1 | 2 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | E 6 | E 6 | S 8 | SSW 5 | — | S 7 | — | — | E 9 | S 6 | SE 9 | SE 8 | S 6 | SE 9 | — | SW 4 | E 10 | E 9 | — |
| kJ | — | — | 3 | 7 | 1 | 4 | — | 4 | — | — | 7 | 2 | 3 | 3 | 1 | 3 | — | 1 | 2 | 2 | — |
Wind waves Height (m) Direction Period (s) | — | SSW 4 | — | — | SSW 5 | N 2 | NNE 3 | — | ENE 5 | ENE 5 | — | SW 3 | NNW 2 | SSW 5 | SW 3 | NNW 3 | E 9 | ESE 4 | SSE 4 | S 5 | SSW 6 |
| kJ | — | 9 | — | — | 9 | 1 | 2 | — | 40 | 36 | — | 2 | 1 | 3 | 3 | 1 | 15 | 12 | 23 | 51 | 249 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 8 | 185 | 4 | 15 | 668 | 273 | 668 | 2580 | 195 | 681 | 48 | 2 | 2 | 162 | 162 | 223 | 2546 | 578 | 578 | 2521 | 2363 |
Best forecast wave conditions in Long Island New York | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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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 16 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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