
Surf Forecasts:
Fortress surf forecast from 11 Aug 2026:
- Best quality surf: Monday 17 Aug, 11AM (local time) - 8ft (2.5m), 8s period, SSW swell with offshore winds.
- Most powerful swell: Monday 17 Aug, 11AM (local time) - 8ft (2.5m), 8s period, SSW swell with 785 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 8AM (local time) - 3ft (0.9m), 6s period with SSW 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 Thursday (Aug 13) at 8AM. The primary swell is predicted to be 0.9m and 6s period with a secondary swell of 0.1m and 8s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Fortress in the next 16 days are 2.5m 8s and forecast to arrive on Monday (Aug 17) at 11AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Thursday (Aug 13) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Thu 13th Aug) | 3ft (0.9m) 6s |
| Best Surf | 11AM (Mon 17th Aug) | 8ft (2.5m) 8s |
| Most Powerful | 11AM (Mon 17th Aug) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Fortress over the next 16 days.
The Lowdown
Alright folks, Rusty here in the old units. Let’s have a good, honest look at the coming swell window for Fortress.
First thing to say is, this is gonna be a long, quiet stretch. We’re talking a 16-day outlook but honestly, there’s next to nothing that’s going to get you out of bed early. The swell is tiny and the wind is all over the shop. Most days are a write-off, with weak, short-period slop and messy conditions. It’s the kind of run where you don’t bother checking the cam.
Looking through the days, Tuesday the 11th is a no-go: 0.5m (2ft) of 6-second S swell, cross-off wind, poor surf. Wednesday the 12th has a moment of glass in the morning but the swell is only 0.4m (1ft) – basically a lake. Thursday the 13th has a slightly bigger 0.7m (2ft) pulse but it’s blown out by strong WSW winds. This pattern of tiny S or SSW swell with messy cross and cross-off wind just keeps repeating through the week. Friday the 14th has offshore WNW wind at 30 km/h (19 mph), but the swell is a pathetic 0.4m (1ft). There’s just no energy.
There is a tiny spike in energy around Monday the 17th. We get a combined energy of 152 (moderate) but it’s only 1.2m (4ft) of 7-second S swell and gusty NNW winds. It’s poor. Tuesday the 18th afternoon sees a long-period 15-second SE groundswell pop up with a combined energy of 211 (moderate), but it’s only 0.4m (1ft) and cross-on. That long period is wasted on this beach.
Honestly, the only time I’d even point a finger is Sunday the 23rd of August. The morning shows 1.1m (4ft) of S swell with offshore W wind at 10 km/h (6 mph). Combined energy is 117 (moderate). The wave comment says “surfable waves but very ordinary conditions.” That’s the most optimistic note in this whole file. The swell is small, light wind, but it’s the best on offer. Even then, we drop back to poor later. Tuesday the 25th gets a similar “surfable but ordinary” tag with 0.8m (3ft) S swell and clean cross-off wind, but again, tiny.
So, what’s the standout? There isn’t one, not really. The best is Sunday the 23rd morning at Fortress – a reef break, fairly consistent, but it’s a small, weak south swell. The water temp is sitting around 22°C (72°F) which is about average for this time of year. If you’re desperate for a splash, that’s your window. But don’t expect much.
If you’re into kites, the strong cross-off winds on the 14th and 22nd might be more your speed than mine.
This is a lean period, groms. Forecasts can change, so don’t lose all hope, but for now, I’d be checking the long-range models for anything else. Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Wed morning. Warm (max 27°C on Tue afternoon, min 20°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 22mm), heaviest during Sun night. Warm (max 27°C on Fri afternoon, min 18°C on Sat morning). Winds increasing (calm on Sat afternoon, strong winds from the SW by Sun night). | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
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) | S 6 | S 6 | S 6 | SSW 5 | SSW 5 | SE 14 | SSW 6 | SE 13 | SSW 5 | SSW 5 | SSW 5 | S 6 | S 6 | S 7 | S 8 | S 7 | SSW 4 | SSW 7 | SSW 8 | S 8 | S 8 |
Wave Graph | |||||||||||||||||||||
16 | 16 | 15 | 9 | 9 | 8 | 42 | 7 | 17 | 9 | 22 | 19 | 12 | 26 | 40 | 26 | 28 | 322 | 785 | 213 | 89 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross | cross | cross | cross | cross | cross | cross-off | off | off | cross |
High Tide | 7:42PM1.05m | 8:09AM0.92m | 8:30PM1.05m | 8:57AM0.98m | 9:15PM1.02m | 9:42AM1.00m | 9:57PM0.97m | 10:26AM1.00m | 10:37PM0.90m | 11:09AM0.98m | 11:13PM0.82m | 11:52AM0.93m | 11:48PM0.74m | ||||||||
Low Tide | 12:50PM-0.04m | 1:49AM-0.08m | 1:44PM-0.07m | 2:30AM-0.10m | 2:34PM-0.08m | 3:10AM-0.09m | 3:22PM-0.05m | 3:46AM-0.07m | 4:08PM-0.01m | 4:21AM-0.02m | 4:53PM0.05m | 4:55AM0.03m | 5:39PM0.12m | ||||||||
5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | |
— | 7:52 | — | — | 7:51 | — | — | 7:49 | — | — | 7:47 | — | — | 7:46 | — | — | 7:45 | — | — | 7:44 | — | |
mm | — | — | 2 | 2 | — | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | 22 | — | — | — |
Temp °C | 24 | 27 | 27 | 21 | 25 | 24 | 24 | 26 | 26 | 22 | 27 | 26 | 19 | 21 | 22 | 23 | 23 | 24 | 23 | 28 | 25 |
Feels °C | 26 | 27 | 27 | 22 | 23 | 22 | 25 | 25 | 26 | 19 | 23 | 22 | 18 | 19 | 19 | 20 | 19 | 21 | 23 | 25 | 23 |
Swell 1 Height (m) Direction Period (s) | S 6 | SE 9 | S 6 | SSW 5 | SSW 5 | SE 8 | SSW 6 | SE 8 | SSW 5 | SSW 5 | SE 9 | S 6 | S 6 | S 7 | S 8 | S 7 | SE 8 | — | S 8 | S 8 | S 8 |
16 | 3 | 15 | 9 | 9 | 3 | 42 | 3 | 17 | 9 | 3 | 19 | 12 | 26 | 40 | 26 | 3 | — | 333 | 213 | 89 | |
Swell 2 Height (m) Direction Period (s) | SE 9 | — | SE 9 | SE 8 | ESE 8 | SE 11 | SE 8 | SE 13 | ESE 9 | SE 9 | E 13 | SE 9 | NE 4 | ENE 5 | SE 9 | SE 9 | — | — | — | — | W 5 |
3 | — | 3 | 3 | 7 | 5 | 3 | 7 | 8 | 3 | 3 | 3 | 4 | 2 | 3 | 3 | — | — | — | — | 2 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | E 15 | SE 14 | SE 14 | SE 14 | SE 13 | SE 13 | SE 13 | SE 13 | E 12 | SE 9 | SE 9 | E 4 | — | — | — | — | — | — |
— | — | — | 4 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 3 | 3 | 3 | 1 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | S 6 | — | — | — | SSW 4 | — | SSW 6 | NNW 2 | NNW 2 | SSW 5 | N 3 | N 3 | — | SW 2 | — | SSW 4 | SSW 7 | SSW 8 | WNW 3 | NNW 4 |
— | 16 | — | — | — | 19 | — | 37 | 1 | 1 | 22 | 1 | 2 | — | 2 | — | 28 | 322 | 785 | 6 | 11 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 801 | 2521 | 801 | 1674 | 1100 | 676 | 801 | 3347 | 10 | 2558 | 716 | 668 | 51 | 4 | 51 | 676 | 1164 | 704 | 8 | 33 | 2 |
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.











