Surf Forecasts:
Fortress surf forecast from 1 Sep 2026:
- Most powerful swell: Wednesday 2 Sep, 11AM (local time) - 5ft (1.5m), 6s period, E swell with 171 kJ wave energy.
Best Forecast Surf Conditions for Fortress this week:
The most powerful waves expected at Fortress in the next 16 days are 1.5m 6s and forecast to arrive on Wednesday (Sep 02) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Tuesday (Sep 08) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Wed 2nd Sep) | 5ft (1.5m) 6s |
Table - best surf conditions forecast for Fortress over the next 16 days.
The Lowdown
Alright folks, Rusty here. Gotta be straight with you – this forecast is a tough one to write. We’re looking at Fortress, and for the bulk of the next two weeks, the ocean is just not playing ball.
For the first ten days, the story is a whole lot of nothing. Tiny, weak swells with poor energy readings mostly in the double digits, and the wind is all over the place. There’s a long stretch of poor surf conditions right through until the 11th of September. You’ll see a few moments of clean, glassy water on the morning of the 7th, but with only 0.7ft of swell and energy at a measly 10, you’d be better off taking a swim. It’s a desert out there.
Now, things get a bit more interesting around the 11th of September. Friday afternoon brings a 6ft swell from the SSW, with a combined energy of 257 – that’s a proper kick of power. The winds are cross-offshore and clean, which is a major positive. But hold your horses. That swell is only 6 seconds period, meaning it’s windswell, not groundswell, and it’s going to be a bit of a messy, walled-up closeout. Given the size and the short period on a reef, this is one for experienced surfers only. It’s the best we’ve got, but it’s far from perfect.
The real standout, if you can call it that, is the morning of the 12th of September. We’ve got a 4ft swell from the S, period up to 8 seconds, and a combined energy of 164. The wind is a clean, moderate offshore from the NW. This is the most “surfable” window of the whole 16 days, with the best shape and the cleanest conditions. The crowds at Fortress can be heavy, and on a day like this, you can bet it’ll be busy.
So, the honest truth is this: the second week has a couple of days that are worth a look, but don’t expect magic. The first week is a write-off. If you’re desperate, the 12th of September is your best bet, but manage your expectations.
Rusty.
Short Range ForecastHeavy rain (total 22mm), heaviest during Tue night. Warm (max 24°C on Thu night, min 19°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Fri afternoon, min 16°C on Sun morning). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | |||||||||||||||
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 7 | SE 8 | SE 12 | E 6 | ESE 6 | ESE 7 | ESE 6 | ESE 6 | SE 8 | SE 8 | SE 8 | S 6 | SSW 6 | SSW 6 | SSE 9 | SSW 6 | E 8 | E 8 | ESE 9 | ESE 8 | SE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 12 | 17 | 71 | 171 | 134 | 145 | 64 | 33 | 18 | 17 | 10 | 20 | 12 | 6 | 8 | 7 | 4 | 4 | 8 | 7 | 3 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-on | on | on | cross | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-on | cross | on | cross | glassy | cross | cross-off |
High Tide | 10:59AM0.94m | 11:19PM0.77m | 11:46AM0.94m | 00:10AM0.72m | 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 | ||||||||
Low Tide | 5:11PM0.09m | 5:09AM0.04m | 6:06PM0.13m | 5:59AM0.08m | 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 | ||||||||
 |  |  |  | |  | | |  |  |  |  | | |  | | | | | | | |
 | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — |
 | — | 7:21 | — | — | 7:19 | — | — | 7:16 | — | — | 7:15 | — | — | 7:14 | — | — | 7:12 | — | — | 7:10 | — |
mm | 2 | 1 | 8 | — | — | 3 | 1 | 1 | 6 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 22 | 21 | 19 | 20 | 21 | 22 | 23 | 24 | 22 | 24 | 24 | 22 | 24 | 24 | 17 | 19 | 19 | 19 | 20 | 21 |
Feels °C | 22 | 22 | 24 | 15 | 17 | 22 | 24 | 24 | 25 | 24 | 25 | 23 | 19 | 22 | 24 | 13 | 17 | 17 | 19 | 17 | 16 |
Swell 1 Height (m) Direction Period (s) | SE 7 | SE 8 | SE 12 | SE 11 | SE 10 | ESE 7 | ESE 6 | ESE 6 | ESE 6 | S 5 | SSW 5 | S 6 | SSW 6 | SSW 6 | E 4 | SSW 6 | SSW 6 | SE 9 | ESE 9 | ESE 8 | SE 9 |
| kJ | 12 | 17 | 71 | 75 | 61 | 145 | 64 | 33 | 12 | 14 | 9 | 20 | 12 | 6 | 2 | 7 | 3 | 3 | 8 | 7 | 3 |
Swell 2 Height (m) Direction Period (s) | — | SE 13 | — | SSW 4 | S 5 | SSW 5 | SE 9 | SE 9 | SE 8 | ESE 6 | ESE 7 | SE 8 | E 8 | E 7 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 |
| kJ | — | 7 | — | 2 | 2 | 2 | 28 | 27 | 18 | 14 | 9 | 10 | 4 | 4 | 4 | 5 | 4 | 4 | 1 | 1 | 2 |
Swell 3 Height (m) Direction Period (s) | SE 14 | SE 10 | — | — | — | SSW 5 | SSW 5 | — | SSW 4 | SE 8 | SE 8 | E 6 | ESE 8 | SE 8 | SSE 9 | SE 9 | SE 9 | S 5 | S 5 | S 6 | — |
| kJ | 8 | 4 | — | — | — | 2 | 2 | — | 3 | 17 | 10 | 3 | 6 | 2 | 8 | 3 | 3 | 1 | 1 | 1 | — |
Wind waves Height (m) Direction Period (s) | S 4 | SSE 3 | E 5 | E 6 | ESE 6 | — | — | S 3 | — | NNW 3 | SW 3 | NNW 3 | NNW 3 | — | N 3 | N 4 | — | — | — | — | SSW 4 |
| kJ | 1 | 1 | 66 | 171 | 134 | — | — | 2 | — | 1 | 2 | 4 | 2 | — | 5 | 6 | — | — | — | — | 34 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 675 | 1784 | 83 | 574 | 1784 | 38 | 38 | 178 | 15 | 2 | 668 | 51 | 227 | 681 | 681 | 724 | 681 | 162 | 193 | 1163 | 676 |
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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