
Surf Forecasts:
Fortress surf forecast from 9 Sep 2026:
- Best quality surf: Sunday 13 Sep, 11PM (local time) - 4.5ft (1.3m), 6s period, S swell with glassy winds.
- Most powerful swell: Thursday 10 Sep, 5AM (local time) - 6ft (1.9m), 7s period, SSW swell with 302 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 8AM (local time) - 1.5ft (0.4m), 10s 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 8AM. The primary swell is predicted to be 0.4m and 10s period with a secondary swell of 0.1m and 10s. Another secondary swell of 0.7m and 5s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Fortress in the next 16 days are 1.9m 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+) | 8AM (Sun 13th Sep) | 1.5ft (0.4m) 10s |
| Best Surf | 11PM (Sun 13th Sep) | 4.5ft (1.3m) 6s |
| Most Powerful | 5AM (Thu 10th Sep) | 6ft (1.9m) 7s |
Table - best surf conditions forecast for Fortress over the next 16 days.
The Lowdown
Alright, Rusty here. Let's look at what's on the menu for the next sixteen days at Fortress.
Honestly, it's a pretty grim stretch. The surf is going to be flat or tiny for the most part, with a lot of wind messing things up. We're looking at a long, dry spell with almost nothing rideable. There’s a tiny window of hope way out near the end, but it's a long way off.
Right now, from Wednesday the 9th to the 23rd of September, there's just no real swell. We're talking knee-high or less, with a weak combined energy (often under 100). The wind is all over the place, mostly cross or sideshore, which will chop up the tiny waves. There's a few glassy moments, like on Saturday the 12th with a glassy 1ft SE swell, but it's just too small to bother with. Sunday the 13th sees a bit of a bump to 3ft, but it's a short-period, junky SSE swell with a combined energy of 80, and the wind is light but onshore, making it sloppy. The water temperature is about average for this time of year, so nothing wild there.
The only real standout, and I mean the *only* one, is way out on Thursday the 24th of September. There's a 2ft swell from the SSE, but it has a very long period of 18 seconds. That's a proper groundswell. The combined energy jumps up to 263, which is respectable. The catch? The wind is a moderate cross-shore from the NNE that will create a cross-chop, so it won't be perfect. This is a reef break, and a long-period SSE swell can wrap in nicely, but that cross-wind will be a pain. It's not a beginner wave at the best of times, and the quality here is still rated as poor. This is a promising but very uncertain long-range prospect.
So, bottom line: if you're desperate, keep an eye on that Thursday the 24th, but don't hold your breath. The rest of the forecast is a write-off. The setup looks more interesting for kite surfing than paddle surfing for most of this period.
Rusty.
Short Range ForecastSome drizzle, heaviest during Thu morning. Warm (max 25°C on Thu afternoon, min 20°C on Fri morning). Winds increasing (light winds from the WSW on Tue night, strong winds from the SW by Wed night). | Days 5-7 Weather SummarySome drizzle, heaviest during Sun afternoon. Warm (max 23°C on Mon afternoon, min 17°C on Sat morning). Wind will be generally light. | ||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | ||||||||||||||
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) | SE 9 | SE 10 | SE 10 | SSW 6 | SSW 7 | SSW 7 | SSW 7 | S 6 | S 6 | S 6 | SE 9 | SE 9 | SE 10 | SSE 5 | SSE 5 | SSE 6 | SSE 6 | SSE 6 | SSE 5 |
Wave Graph | |||||||||||||||||||
3 | 4 | 15 | 266 | 197 | 158 | 77 | 29 | 29 | 22 | 14 | 14 | 24 | 44 | 60 | 77 | 38 | 29 | 19 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross | glassy | cross-on | cross | glassy | cross-on | glassy | cross-on | glassy | cross-off |
High Tide | 7:03AM0.91m | 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 | |||||||
Low Tide | 00:44AM-0.01m | 12:46PM-0.02m | 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 | ||||||
— | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — | |
7:08 | — | 7:07 | — | — | 7:06 | — | — | 7:04 | — | — | 7:01 | — | — | 7:00 | — | — | 6:59 | — | |
mm | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — |
Temp °C | 23 | 22 | 23 | 23 | 23 | 25 | 25 | 20 | 24 | 22 | 18 | 20 | 21 | 21 | 19 | 21 | 22 | 23 | 23 |
Feels °C | 20 | 23 | 21 | 18 | 19 | 24 | 24 | 15 | 19 | 17 | 17 | 18 | 21 | 21 | 17 | 22 | 24 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 8 | SE 10 | SE 9 | SE 8 | SE 9 | SSW 7 | S 6 | S 6 | S 6 | S 6 | SSW 6 | SE 10 | SE 10 | SE 9 | SSE 6 | SSE 6 | SSE 6 | SSE 5 |
3 | 3 | 15 | 12 | 11 | 13 | 77 | 29 | 29 | 22 | 10 | 6 | 24 | 34 | 31 | 77 | 38 | 29 | 19 | |
Swell 2 Height (m) Direction Period (s) | E 9 | SE 10 | E 9 | E 8 | E 8 | E 8 | ESE 10 | SE 10 | SE 10 | SSE 7 | SE 9 | SE 9 | SE 10 | S 9 | SE 10 | SE 9 | SE 9 | SE 9 | SE 9 |
2 | 4 | 2 | 1 | 1 | 1 | 9 | 15 | 15 | 4 | 14 | 14 | 4 | 2 | 4 | 28 | 20 | 12 | 12 | |
Swell 3 Height (m) Direction Period (s) | S 5 | E 9 | — | — | — | — | SE 8 | — | — | SE 9 | SE 6 | SSE 6 | — | — | — | S 10 | WSW 4 | WSW 4 | E 15 |
1 | 2 | — | — | — | — | 3 | — | — | 3 | 2 | 4 | — | — | — | 2 | 1 | 2 | 4 | |
Wind waves Height (m) Direction Period (s) | SW 3 | SSW 2 | SSW 4 | SSW 6 | SSW 7 | SSW 7 | — | NNW 3 | — | — | — | — | S 3 | SSE 5 | SSE 5 | SSW 6 | — | — | E 3 |
2 | 1 | 15 | 266 | 197 | 158 | — | 2 | — | — | — | — | 2 | 44 | 60 | 40 | — | — | 3 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 636 | 1065 | 1065 | 1065 | 185 | 185 | 2 | 2 | 10 | 15 | 810 | 1155 | 232 | 0 | 8 | 0 | 47 | 2 | 15 |
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.










