
Surf Forecasts:
Fortress surf forecast from 9 Sep 2026:
- Best quality surf: Thursday 10 Sep, 8PM (local time) - 3.5ft (1.0m), 7s period, SSW swell with cross-offshore winds.
- Most powerful swell: Thursday 10 Sep, 5AM (local time) - 6ft (1.8m), 7s period, SSW swell with 273 kJ wave energy.
- Next surfable swell (1★+): Thursday 10 Sep, 8PM (local time) - 3.5ft (1.0m), 7s 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 (Sep 10) at 8PM. The primary swell is predicted to be 1.0m and 7s period with a secondary swell of 0.3m and 10s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Fortress in the next 16 days are 1.8m 7s and forecast to arrive on Thursday (Sep 10) at 5AM. Winds are predicted to be cross-offshore 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+) | 8PM (Thu 10th Sep) | 3.5ft (1.0m) 7s |
| Best Surf | 8PM (Thu 10th Sep) | 3.5ft (1.0m) 7s |
| Most Powerful | 5AM (Thu 10th Sep) | 6ft (1.8m) 7s |
Table - best surf conditions forecast for Fortress over the next 16 days.
The Lowdown
Well, grab a coffee and let’s have a yarn about the next couple of weeks at Fortress. I’ve been staring at the charts, and honestly, the short version is this: it’s looking pretty bleak for a proper paddle. We’ve got a solid stretch of flatness and mush ahead, so if you’re hanging for a wave, you might want to pick up another hobby for a bit. There’s a small window of hope late in the game, but it’s a long way off and comes with its own set of problems.
To kick things off, the water temp here is sitting at 70°, which is about 1.4° warmer than the long-term average for this time of year. So, it’s a touch on the warm side, but nothing crazy – just your usual late-summer feel.
Alright, let’s walk through it. The next several days are a total write-off. Wednesday the 9th has some swell, but it’s a weak, short-period 2.6ft at 4 seconds, coming from the SSW. The wind is a fresh 19 mph cross-shore, making it lumpy and messy. The energy is weak, way down at 38. Thursday the 10th brings a bit more size, pushing to 4.6ft, but the period is still a short 7 seconds, and while the wind is better (cross-off), the quality is just poor. It’s all just too jumbled and weak to be any fun.
Friday and the weekend basically flatline. We’re looking at 1.6ft to 2ft waves, which is ankle-biters territory. Saturday morning has a brief glassy period, but there's no swell to speak of. The energy readings are pathetic, down in the 20s and 30s. The whole stretch from Friday the 11th through to Tuesday the 15th is a multi-day gap of no real surf. I’m talking days of nothing. If the conditions are flat, the conditions are flat. It’s a common blank run for this area. You just have to accept it.
We get a little bump in energy on the 17th with a 3.9ft swell, but the wind is a fresh 19 mph cross-onshore, and it’s lumpy as all hell. That’s more of a kite-surfing wind than a wave-riding wind. Let’s be honest, that setup looks like a washing machine.
Now, the one glimmer of hope in the whole window is around Thursday the 24th of September. We’ve got a couple of days of building swell. It starts Thursday morning with a 4.3ft swell at 7 seconds, and then the afternoon sees it bump up to 4.6ft at 8 seconds. The combined energy starts to climb, hitting 206 in the morning and then 299 in the afternoon, which is moderate wave energy. The problem is the wind. It's a fresh 19 mph cross-onshore in the morning, easing to a moderate 12 mph cross-onshore in the afternoon. It’ll be chopped up and messy. But it is the only time in the period with any real push behind it. This is a long-range call, so don’t book the day off work just yet, but it’s the only one with any potential to be at least interesting. It’s still likely to be too messy for a clean session, but if you’re desperate, it’s your best shot.
So, bottom line: get the fishing rod out, or fix the dings on your board, because there’s not much to surf out there for the next couple of weeks.
Stay salty.
Short Range ForecastSome drizzle, heaviest during Thu morning. Warm (max 27°C on Thu afternoon, min 19°C on Sat morning). Winds decreasing (strong winds from the SW on Wed night, calm by Sat morning). | Days 5-7 Weather SummaryHeavy rain (total 32mm), heaviest during Sun morning. Warm (max 25°C on Sun afternoon, min 18°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Wed 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | ||||||||||||||
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) | SSW 4 | SSW 6 | SSW 7 | SSW 7 | SSW 7 | S 6 | S 6 | S 7 | SE 9 | SE 9 | SE 10 | SE 10 | SE 9 | SE 9 | SSE 6 | SE 9 | SE 8 | SE 7 | SE 7 | S 4 |
Wave Graph | ||||||||||||||||||||
21 | 266 | 203 | 128 | 58 | 27 | 18 | 22 | 14 | 14 | 15 | 33 | 31 | 21 | 43 | 22 | 18 | 10 | 8 | 22 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | glassy | cross | cross | cross-on | cross | off | cross-off | cross-off | cross-on | cross-on | cross | cross-off |
High Tide | 7:27PM0.99m | 7:50AM0.98m | 8:11PM0.98m | 8:33AM1.02m | 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 | |||||||
Low Tide | 1:24AM-0.04m | 1:34PM-0.05m | 2:00AM-0.05m | 2:19PM-0.05m | 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 | |||||||
— | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — | 6:26 | — | — | |
7:07 | — | — | 7:06 | — | — | 7:04 | — | — | 7:01 | — | — | 7:00 | — | — | 6:59 | — | — | 6:57 | — | |
mm | — | — | 1 | — | — | — | — | — | — | — | — | 29 | 3 | — | — | — | — | — | — | — |
Temp °C | 23 | 23 | 23 | 27 | 26 | 21 | 25 | 23 | 19 | 22 | 23 | 21 | 25 | 24 | 22 | 25 | 24 | 20 | 22 | 23 |
Feels °C | 20 | 18 | 21 | 25 | 26 | 18 | 20 | 21 | 18 | 21 | 21 | 20 | 27 | 26 | 18 | 20 | 19 | 19 | 20 | 20 |
Swell 1 Height (m) Direction Period (s) | SE 10 | SE 9 | SE 9 | SE 9 | SSW 7 | S 6 | S 6 | S 7 | SSW 6 | SSW 6 | SE 10 | SE 10 | SE 9 | SSE 5 | SSE 6 | SSE 6 | SSE 6 | SE 7 | SE 7 | ESE 6 |
15 | 12 | 12 | 13 | 58 | 27 | 18 | 22 | 12 | 6 | 15 | 33 | 31 | 21 | 43 | 22 | 12 | 8 | 7 | 3 | |
Swell 2 Height (m) Direction Period (s) | E 9 | E 8 | E 8 | E 8 | SE 10 | SE 10 | SE 9 | ESE 9 | SE 9 | SE 9 | SE 6 | SE 10 | — | SE 9 | SE 9 | SE 9 | SE 8 | ESE 9 | ESE 9 | ESE 9 |
2 | 1 | 1 | 1 | 14 | 15 | 14 | 8 | 14 | 14 | 1 | 33 | — | 21 | 20 | 20 | 18 | 8 | 8 | 8 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | SE 8 | — | — | SE 6 | SE 6 | SSE 6 | — | — | — | SSW 5 | — | — | E 15 | SE 15 | E 15 | SE 14 |
— | — | — | — | 3 | — | — | 2 | 1 | 4 | — | — | — | 2 | — | — | 4 | 8 | 4 | 7 | |
Wind waves Height (m) Direction Period (s) | SSW 4 | SSW 6 | SSW 7 | SSW 7 | — | NNW 3 | W 2 | — | — | — | S 3 | S 5 | SSE 5 | — | — | — | — | SSE 5 | SSE 3 | S 4 |
21 | 266 | 203 | 128 | — | 3 | 1 | — | — | — | 6 | 22 | 18 | — | — | — | — | 10 | 6 | 22 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1065 | 936 | 55 | 55 | 15 | 15 | 1494 | 15 | 1163 | 668 | 273 | 185 | 10 | 2 | 2 | 2 | 819 | 383 | 1163 | 273 |
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.










