Surf Forecasts:
Fortress surf forecast from 10 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, 5PM (local time) - 3.5ft (1.1m), 7s period, SSW swell with 105 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 9s. Another secondary swell of 0.1m and 7s is also forecast. 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 1.1m 7s and forecast to arrive on Thursday (Sep 10) at 5PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Wednesday (Sep 16) at 2PM.
| 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 | 5PM (Thu 10th Sep) | 3.5ft (1.1m) 7s |
Table - best surf conditions forecast for Fortress over the next 16 days.
The Lowdown
G’day, Rusty here. Look, I’ve gotta be straight with you—Fortress is looking like a tough beat over the next 16 days. There’s no real standout session, and most of the time the conditions are just not playing the game. The water temp is sitting right on 70°, which is about average for the time of year, so nothing unusual there.
The first bit of surf worth mentioning shows up on Sunday, September 13th. The morning brings some light rain and a weak, short-period swell from the SSE at 3 ft with a combined energy of 116 (moderate wave energy), but the wind is onshore, so it’s not great. The afternoon though, it goes glassy—wind drops to nearly nothing, and the same 3 ft SSE swell is still there, with energy dropping to 81 (weak). The conditions are clean, but it’s just ordinary surf. Not a day to get excited about.
You get a bit of a run through the middle of the week, but it’s mostly small, messy, and cross-shore. The next little flicker is Sunday, September 20th, in the morning. A weak, short-period 3 ft swell from the S, combined energy of 54 (weak), with light cross-offshore winds. It’s surfable but very ordinary. Nothing to write home about.
The last chance is Thursday, September 24th, in the morning. A 3 ft E swell with a period of 8 seconds, combined energy of 110 (moderate), and a strong offshore breeze from the WNW at 28 mph. That wind is strong—it’ll clean the surface up, but it’s going to be a battle to get out and hard to paddle into. Not a beginner’s day.
There’s a stretch from the 10th to the 20th where most days are just poor—windy, choppy, or tiny. It’s a long gap with no real quality. The surf here is fairly consistent, but the quality just isn’t there. Forecasts can change, though, so don’t write it off completely.
Alright, I’m Rusty, signing off.
Short Range ForecastModerate rain (total 17mm), heaviest on Sun morning. Warm (max 28°C on Thu afternoon, min 19°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Sun afternoon. Warm (max 24°C on Sun afternoon, min 16°C on Mon night). Winds increasing (light winds from the E on Mon night, fresh winds from the SSW by Wed morning). | |||||||||||||||||||
Thu 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | ||||||||||||||
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 7 | SSW 6 | S 6 | S 6 | S 6 | SE 9 | SE 9 | SSE 5 | SSE 6 | SSE 6 | SSE 5 | SE 9 | SE 7 | SE 7 | E 4 | SE 4 | ESE 9 | ESE 7 | SSW 4 | SE 13 |
Wave Graph  | ||||||||||||||||||||
 kJ | 105 | 56 | 27 | 18 | 21 | 14 | 14 | 26 | 51 | 40 | 33 | 23 | 43 | 23 | 14 | 8 | 8 | 17 | 25 | 7 |
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 | on | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-on | on | cross-on | cross | cross | cross-off | cross |
High Tide | 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 | 11:46AM0.85m | 11:40PM0.67m | |||||||
Low Tide | 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 | 5:42PM0.20m | ||||||||
 |  |  | |  | | |  |  |  | | | | | | | | | | | |
 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — | 6:26 | — | — | 6:28 | — | — |
 | 7:06 | — | — | 7:04 | — | — | 7:01 | — | — | 7:00 | — | — | 6:59 | — | — | 6:57 | — | — | 6:55 | — |
mm | — | — | — | — | — | — | — | 2 | 15 | 1 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 26 | 21 | 25 | 23 | 20 | 22 | 23 | 23 | 24 | 24 | 21 | 24 | 22 | 18 | 18 | 19 | 20 | 20 | 21 |
Feels °C | 26 | 25 | 17 | 21 | 20 | 19 | 20 | 21 | 24 | 26 | 25 | 18 | 22 | 21 | 17 | 16 | 15 | 16 | 15 | 19 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SSW 6 | S 6 | S 6 | S 6 | SSW 6 | SSW 6 | SE 10 | SSE 6 | SSE 6 | SSE 5 | SSE 6 | SE 7 | SE 7 | SE 6 | SE 6 | ESE 4 | ESE 7 | ESE 8 | ESE 6 |
| kJ | 12 | 56 | 27 | 18 | 21 | 12 | 6 | 15 | 51 | 40 | 33 | 23 | 43 | 23 | 6 | 6 | 4 | 17 | 11 | 3 |
Swell 2 Height (m) Direction Period (s) | E 8 | SE 10 | SE 8 | SE 10 | SE 9 | SE 9 | SE 9 | S 9 | SE 10 | SE 9 | SE 9 | SE 9 | S 6 | S 6 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | SE 9 | SE 9 |
| kJ | 1 | 14 | 11 | 14 | 3 | 14 | 14 | 2 | 24 | 22 | 21 | 20 | 12 | 6 | 8 | 8 | 8 | 8 | 3 | 3 |
Swell 3 Height (m) Direction Period (s) | — | SE 8 | — | SE 7 | SE 6 | SE 6 | S 9 | — | — | ENE 4 | S 10 | — | NE 3 | E 5 | S 6 | E 15 | SE 6 | SE 13 | SE 13 | SE 13 |
| kJ | — | 2 | — | 2 | 2 | 1 | 1 | — | — | 1 | 2 | — | 2 | 1 | 2 | 4 | 1 | 7 | 7 | 7 |
Wind waves Height (m) Direction Period (s) | SSW 7 | — | — | — | — | ENE 2 | SE 6 | SSE 5 | — | — | SW 3 | N 3 | — | ENE 3 | E 4 | SE 4 | S 3 | SSW 3 | SSW 4 | SSW 4 |
| kJ | 105 | — | — | — | — | 1 | 9 | 26 | — | — | 3 | 2 | — | 2 | 14 | 8 | 5 | 9 | 25 | 22 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 55 | 58 | 0 | 2 | 129 | 15 | 1163 | 716 | 303 | 144 | 0 | 10 | 51 | 118 | 678 | 1463 | 2627 | 1223 | 203 | 2537 |
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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