Surf Forecasts:
Fortress surf forecast from 12 Sep 2026:
- Best quality surf: Sunday 13 Sep, 8PM (local time) - 1.5ft (0.4m), 9s period, SE swell with offshore winds.
- Most powerful swell: Sunday 13 Sep, 2AM (local time) - 2.5ft (0.7m), 10s period, SSE swell with 85 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 8PM (local time) - 1.5ft (0.4m), 9s period with SE swell.
Best Forecast Surf Conditions for Fortress this week:
The surf forecast for Fortress over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 13) at 8PM. The primary swell is predicted to be 0.4m and 9s period with a secondary swell of 0.7m and 5s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Fortress in the next 16 days are 0.7m 10s and forecast to arrive on Sunday (Sep 13) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Thursday (Sep 17) at 8PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Sun 13th Sep) | 1.5ft (0.4m) 9s |
| Best Surf | 8PM (Sun 13th Sep) | 1.5ft (0.4m) 9s |
| Most Powerful | 2AM (Sun 13th Sep) | 2.5ft (0.7m) 10s |
Table - best surf conditions forecast for Fortress over the next 16 days.
The Lowdown
Alright, grab a seat. Rusty here, and I'm looking straight at the Fortress forecast. Honestly, it’s a tough one. We’ve got a 16-day window, and for a good chunk of it, there’s just nothing worth paddling out for.
Right now, we're in a flat spell that runs almost the whole first week and a half. From Saturday the 12th all the way through to Thursday the 24th, it’s mostly tiny, weak, and junky. Swell heights are barely scraping 2 ft, with combined energy reading in the paltry 20s and 30s – you'd be fighting for a ride. Winds are all over the place, mostly onshore or cross, and the water temp feels about average for this time of year.
There is a little bit of light at the end of the tunnel, though. Keep your eyes on Friday the 25th. We see a jump in size, but it’s still a bit raw. By Saturday the 26th morning, things almost come together. A 4 ft SE swell, period around 7 seconds, and crucially, glassy conditions with a light southerly breeze out of the south. The combined energy climbs to 209 (moderate). That’s the best we see. It won't be perfect, the short period means it might be a bit bumpy, but for this run, that Saturday morning glass-off is the standout – clean conditions for small waves. If you're an experienced surfer, you might get a couple of fun ones, but the 4 ft swell isn't anything too serious.
After that, it gets messy again, with strong winds. Don't hold your breath for this one.
Rusty.
Short Range ForecastHeavy rain (total 41mm), heaviest during Sun morning. Warm (max 22°C on Fri night, min 17°C on Mon morning). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 21°C on Mon night, min 15°C on Mon night). Winds decreasing (fresh winds from the NE on Mon night, calm by Wed afternoon). | ||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | ||||||||||||||
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) | S 6 | SE 9 | SE 9 | SSE 10 | SE 10 | SE 9 | SE 9 | SE 9 | SE 8 | SE 8 | ENE 6 | E 5 | ESE 7 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 7 | ESE 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 19 | 14 | 14 | 85 | 33 | 31 | 29 | 20 | 35 | 19 | 83 | 25 | 67 | 70 | 73 | 68 | 48 | 28 | 16 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross | cross-on | on | cross | cross-on | glassy | cross | cross-off | cross-off | cross-off |
High Tide | 8:51PM0.95m | 9:14AM1.04m | 9:28PM0.91m | 9:53AM1.02m | 10:02PM0.85m | 10:31AM0.98m | 10:34PM0.79m | 11:08AM0.92m | 11:06PM0.73m | 11:46AM0.85m | 11:40PM0.67m | 12:26PM0.79m | 00:22AM0.62m | ||||||
Low Tide | 2:34AM-0.05m | 3:01PM-0.04m | 3:07AM-0.03m | 3:41PM0.01m | 3:38AM0.01m | 4:20PM0.06m | 4:11AM0.06m | 4:59PM0.13m | 4:46AM0.11m | 5:42PM0.20m | 5:24AM0.17m | 6:31PM0.27m | |||||||
 |  |  |  |  |  | | | | | | | | | | | | | | |
 | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — | 6:26 | — | — | 6:28 | — | — | 6:28 | — | — |
 | 7:04 | — | 7:01 | — | — | 7:00 | — | — | 6:59 | — | — | 6:57 | — | — | 6:55 | — | — | 6:53 | — |
mm | — | — | — | — | 22 | 8 | — | 11 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 18 | 20 | 22 | 22 | 22 | 21 | 18 | 22 | 21 | 16 | 17 | 17 | 15 | 17 | 18 | 19 | 20 | 21 |
Feels °C | 19 | 15 | 19 | 21 | 21 | 23 | 22 | 13 | 17 | 14 | 13 | 14 | 13 | 13 | 17 | 16 | 17 | 17 | 19 |
Swell 1 Height (m) Direction Period (s) | S 6 | SSW 6 | S 5 | SE 10 | SE 10 | SSE 5 | SSE 5 | SSE 5 | SE 8 | SE 8 | S 6 | S 7 | ESE 7 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 7 | ESE 7 |
| kJ | 19 | 6 | 5 | 24 | 33 | 20 | 28 | 16 | 35 | 16 | 3 | 4 | 67 | 70 | 73 | 68 | 48 | 28 | 16 |
Swell 2 Height (m) Direction Period (s) | ESE 9 | SE 9 | SE 9 | — | S 9 | SE 9 | SE 9 | SE 9 | S 6 | S 6 | SE 10 | ESE 9 | S 7 | SE 13 | SE 13 | SE 13 | SE 13 | SE 12 | SE 12 |
| kJ | 8 | 14 | 14 | — | 2 | 31 | 29 | 20 | 6 | 2 | 4 | 8 | 1 | 7 | 7 | 7 | 6 | 6 | 6 |
Swell 3 Height (m) Direction Period (s) | SE 6 | SE 6 | E 3 | — | — | SW 5 | S 10 | SE 5 | — | ESE 9 | E 15 | S 6 | SE 14 | S 6 | — | — | — | ESE 9 | SE 9 |
| kJ | 2 | 1 | 1 | — | — | 3 | 2 | 4 | — | 8 | 4 | 1 | 7 | 1 | — | — | — | 8 | 3 |
Wind waves Height (m) Direction Period (s) | — | ENE 3 | — | SSE 10 | SSE 5 | — | SW 3 | NNW 3 | NW 3 | NE 4 | ENE 6 | E 5 | — | — | — | — | — | SSW 3 | SW 4 |
| kJ | — | 2 | — | 85 | 24 | — | 5 | 3 | 3 | 19 | 83 | 25 | — | — | — | — | — | 6 | 16 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 675 | 810 | 716 | 414 | 144 | 2 | 0 | 148 | 51 | 273 | 122 | 1065 | 25 | 148 | 0 | 10 | 162 | 815 | 219 |
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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