Surf Forecasts:
Fortress surf forecast from 15 Aug 2026:
- Best quality surf: Monday 17 Aug, 11AM (local time) - 4ft (1.2m), 6s period, SE swell with offshore winds.
- Most powerful swell: Monday 17 Aug, 8AM (local time) - 6.5ft (2.0m), 7s period, S swell with 366 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 11AM (local time) - 4ft (1.2m), 6s 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 Monday (Aug 17) at 11AM. The primary swell is predicted to be 1.2m and 6s period with a secondary swell of 1.0m and 7s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Fortress in the next 16 days are 2.0m 7s and forecast to arrive on Monday (Aug 17) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Saturday (Aug 15) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Mon 17th Aug) | 4ft (1.2m) 6s |
| Best Surf | 11AM (Mon 17th Aug) | 4ft (1.2m) 6s |
| Most Powerful | 8AM (Mon 17th Aug) | 6.5ft (2.0m) 7s |
Table - best surf conditions forecast for Fortress over the next 16 days.
The Lowdown
Alright, this is Rusty, and I’ve been poring over the charts for our local patch. Gotta be straight with you – it’s a lean run ahead, and there’s no hiding from it.
We’re looking at a real struggle to get anything rideable for most of the next two and a half weeks. The only real whisper of hope comes on Monday the 17th of August at Fortress. This is a reef set-up that’s exposed to swell from the SE.
That Monday, a pulse pushes through. Morning sees a 4 ft swell from the SE with a period of 6 seconds, but the wind is offshore out of the WNW, blowing at 12 mph. It’s going to be clean. The combined energy is moderate (219), and the afternoon holds with a similar 4 ft from the S, period 7 seconds, and a gentle 9 mph offshore from the WNW again (energy 227). That’s the only window with any kind of shape. If you can get on it, you’ll be in luck, but it’s a short window and that period is short, so it’ll be a bit fat and quick on the face.
Other than that, it’s a whole lot of nothing. The rest of the period is plagued by cross-shore winds, onshore breezes, and tiny swell (mostly 1.0 ft to 2 ft). The combined energy values are nearly all below 100 (weak), and the wind is never your friend. Conditions are consistently rated as “poor” or worse. After the 17th, we don’t see another proper recommendation until late in the run. On Thursday the 27th of August, the morning sees very ordinary surfable waves with a 2 ft SE swell (period 10 seconds) but light cross-offshore wind – energy just breaks into three digits (109). The afternoon improves slightly with a clean 2 ft SE swell (period 10 seconds) and a 12 mph offshore from the W (energy 103). Compared to the rest, it’s a usable option, but it’s not a standout at all. It’s more of a “if you’re desperate” kind of session.
Honestly, with this persistent lack of quality and the small, weak swell, the setup at Fortress looks more interesting for kite surfing than paddle surfing for most of the month. The Saturday 29th and Sunday 30th of August drop right back into the doldrums with no hope.
The water temp isn’t mentioned in the data, so I can’t give you a specific number. But with such a flat spell, even the fish are probably bored.
It’s a tough outlook. The forecast can change, but right now, mark your calendar for that Monday the 17th if you want the only real taste of action.
Rusty.
Short Range ForecastHeavy rain (total 34mm), heaviest during Sun night. Warm (max 27°C on Mon afternoon, min 20°C on Sat morning). Winds increasing (calm on Fri night, strong winds from the S by Sun night). | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Thu morning. Warm (max 28°C on Mon night, min 20°C on Tue morning). Wind will be generally light. | ||||||||||||||||||
Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | ||||||||||||||
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 5 | S 6 | SSE 6 | S 6 | S 6 | S 3 | S 5 | SE 6 | S 7 | SSE 7 | S 7 | SE 8 | SE 7 | SE 7 | SE 7 | S 5 | SSW 5 | SSW 6 | SSW 6 |
Wave Graph  | |||||||||||||||||||
 kJ | 3 | 3 | 4 | 3 | 7 | 7 | 83 | 120 | 181 | 102 | 53 | 49 | 41 | 23 | 21 | 75 | 87 | 102 | 59 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross | cross-off | cross-on | cross | cross | off | off | cross | cross | cross | cross-off | cross | cross | cross | cross | cross-off | cross |
High Tide | 9:57PM0.97m | 10:26AM1.00m | 10:37PM0.90m | 11:09AM0.98m | 11:13PM0.82m | 11:52AM0.93m | 11:48PM0.74m | 12:35PM0.87m | 00:23AM0.67m | 1:23PM0.81m | 1:03AM0.61m | 2:23PM0.77m | 1:53AM0.57m | ||||||
Low Tide | 3:46AM-0.07m | 4:08PM-0.01m | 4:21AM-0.02m | 4:53PM0.05m | 4:55AM0.03m | 5:39PM0.12m | 5:30AM0.09m | 6:28PM0.20m | 6:07AM0.15m | 7:27PM0.26m | 6:51AM0.20m | 8:51PM0.30m | |||||||
 |  |  | | | |  |  | |  | | | | | | |  | | | |
 | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — |
 | 7:47 | — | 7:46 | — | — | 7:45 | — | — | 7:44 | — | — | 7:42 | — | — | 7:40 | — | — | 7:38 | — |
mm | — | — | — | — | — | — | 27 | 7 | — | — | — | — | — | — | — | — | 2 | — | — |
Temp °C | 23 | 20 | 23 | 23 | 21 | 23 | 23 | 24 | 27 | 28 | 20 | 22 | 22 | 23 | 23 | 23 | 24 | 26 | 26 |
Feels °C | 25 | 17 | 20 | 22 | 21 | 21 | 19 | 21 | 28 | 28 | 19 | 21 | 21 | 22 | 21 | 21 | 24 | 27 | 29 |
Swell 1 Height (m) Direction Period (s) | S 5 | S 6 | E 4 | SE 9 | S 6 | SSE 8 | — | SE 6 | S 7 | SSE 7 | SE 8 | SE 8 | SE 7 | SE 7 | SE 7 | ESE 6 | SE 9 | SE 8 | SSW 6 |
| kJ | 2 | 2 | 1 | 3 | 7 | 7 | — | 120 | 181 | 102 | 53 | 49 | 41 | 23 | 21 | 7 | 12 | 11 | 59 |
Swell 2 Height (m) Direction Period (s) | SE 9 | SE 9 | SSE 6 | S 6 | SE 9 | SE 6 | — | SSW 7 | SE 6 | — | S 7 | S 6 | SSW 6 | S 6 | SE 9 | SE 9 | ESE 6 | ESE 6 | SE 8 |
| kJ | 3 | 3 | 4 | 3 | 3 | 2 | — | 99 | 46 | — | 44 | 20 | 7 | 6 | 14 | 12 | 3 | 3 | 11 |
Swell 3 Height (m) Direction Period (s) | S 6 | S 6 | SE 9 | S 5 | SE 6 | — | — | — | — | — | SE 13 | SE 12 | SE 11 | SE 10 | — | — | — | S 8 | ESE 6 |
| kJ | 1 | 1 | 3 | 1 | 2 | — | — | — | — | — | 7 | 6 | 18 | 15 | — | — | — | 1 | 4 |
Wind waves Height (m) Direction Period (s) | — | ENE 3 | — | WSW 2 | — | S 3 | S 5 | — | — | — | NE 3 | — | — | SSW 2 | SSW 4 | S 5 | SSW 5 | SSW 6 | — |
| kJ | — | 2 | — | 1 | — | 7 | 83 | — | — | — | 3 | — | — | 1 | 14 | 75 | 87 | 102 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 675 | 1664 | 2521 | 1664 | 1511 | 1163 | 1466 | 0 | 0 | 32 | 2 | 38 | 55 | 237 | 219 | 801 | 144 | 32 | 32 |
Best forecast wave conditions in Long Island New York | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Fortress surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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