Surf Forecasts:
Fortress surf forecast from 13 Aug 2026:
- Best quality surf: Monday 17 Aug, 5AM (local time) - 4.5ft (1.4m), 7s period, S swell with offshore winds.
- Most powerful swell: Sunday 16 Aug, 11PM (local time) - 6ft (1.8m), 6s period, SSW swell with 256 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 5AM (local time) - 4.5ft (1.4m), 7s period with S 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 5AM. The primary swell is predicted to be 1.4m and 7s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Fortress in the next 16 days are 1.8m 6s and forecast to arrive on Sunday (Aug 16) at 11PM. 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 Thursday (Aug 13) at 11AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 17th Aug) | 4.5ft (1.4m) 7s |
| Best Surf | 5AM (Mon 17th Aug) | 4.5ft (1.4m) 7s |
| Most Powerful | 11PM (Sun 16th Aug) | 6ft (1.8m) 6s |
Table - best surf conditions forecast for Fortress over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at the forecast for Fortress over the next couple of weeks. I’ll be straight with you – it’s a pretty quiet stretch for this spot, with a lot of flat spells and ordinary conditions. The water temp is sitting about average for the time of year, nothing out of the ordinary there.
The first decent chance isn’t until Monday the 17th of August. We’ll see a small pulse of swell from the south at about 3ft, but the period is a short 7 seconds, so it’ll be a bit weak and wonky. The morning has a clean offshore wind from the NW, which is a big positive, but the wave energy is low (91). It’s surfable but very ordinary. Not a standout, just a chance to get wet.
The next real look comes on Saturday the 22nd of August. The morning shows a bit more size from the south at 4ft, still with a short period of 6 seconds. The energy picks up a notch (127), and with a light NNW wind and clean conditions, it might be worth a paddle. But again, it’s ordinary, nothing to write home about. The afternoon sees the wind turn onshore, so get it early.
The following Thursday the 27th of August has a similar setup – 4ft south swell, low period, with moderate cross-offshore wind. The energy is moderate (137), and there’s a risk of thunderstorms. It’s messy and not really a classic. Friday the 28th of August morning has a clean offshore wind from the WNW with 3ft east swell, but with a short period and only moderate energy (124). It’s surfable, but still just ordinary.
There are no true standouts in this 16-day window. The swell is small, the period is short, and most days are either flat or have poor conditions. For a reef break that likes a bit of SE groundswell, we just aren’t getting the right combo. The best of a bad bunch would be the clean mornings on Monday 17th and Saturday 22nd, but honestly, don’t expect much. If you’re a beginner, the 2ft to 3ft days with clean winds are your safest bet, but anything over 4ft here is still small enough for most.
Keep an eye on it, but for now, it’s a quiet spell.
Rusty.
Short Range ForecastModerate rain (total 17mm), heaviest on Fri night. Warm (max 28°C on Thu afternoon, min 17°C on Fri night). Winds decreasing (fresh winds from the NNE on Fri night, light winds from the ESE by Sat afternoon). | Days 5-7 Weather SummarySome drizzle, heaviest during Sun night. Warm (max 27°C on Mon afternoon, min 21°C on Sat night). Winds decreasing (strong winds from the SSW on Sun night, calm by Mon night). | ||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | ||||||||||||||
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 14 | SW 4 | SE 13 | SSW 5 | ESE 9 | ESE 9 | NE 4 | NE 4 | S 6 | S 6 | SSW 6 | S 5 | SSW 7 | S 7 | S 7 | S 7 | S 6 | SE 13 | SE 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 8 | 9 | 7 | 9 | 9 | 8 | 16 | 4 | 3 | 20 | 28 | 85 | 239 | 91 | 82 | 62 | 29 | 27 | 51 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | cross-off | off | cross-off | cross | cross-off | cross | cross | cross | cross | cross-off | off | cross-off | cross-off | cross-on | on | on |
High Tide | 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 | 12:35PM0.87m | 00:23AM0.67m | ||||||
Low Tide | 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 | 5:30AM0.09m | 6:28PM0.20m | |||||||
 |  | |  |  | | | |  | | |  | | | |  | | | | |
 | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — |
 | 7:51 | — | 7:49 | — | — | 7:47 | — | — | 7:46 | — | — | 7:45 | — | — | 7:44 | — | — | 7:42 | — |
mm | 1 | 3 | 1 | — | — | — | 12 | — | — | — | — | — | 1 | — | — | — | — | — | — |
Temp °C | 25 | 23 | 28 | 27 | 23 | 26 | 25 | 19 | 21 | 22 | 22 | 23 | 24 | 23 | 27 | 25 | 24 | 24 | 24 |
Feels °C | 23 | 24 | 25 | 23 | 22 | 23 | 23 | 15 | 19 | 19 | 20 | 19 | 23 | 23 | 27 | 25 | 25 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | SE 8 | SW 4 | SE 8 | SSW 5 | SSW 5 | ESE 9 | S 5 | NE 4 | S 6 | SE 9 | SE 9 | SE 9 | — | S 7 | S 7 | S 7 | S 6 | S 6 | S 6 |
| kJ | 3 | 9 | 3 | 9 | 5 | 8 | 2 | 4 | 3 | 3 | 3 | 3 | — | 91 | 82 | 62 | 29 | 19 | 24 |
Swell 2 Height (m) Direction Period (s) | SE 14 | S 5 | SE 13 | ESE 9 | ESE 9 | S 5 | SE 9 | SE 9 | SE 9 | — | S 6 | — | — | — | — | SSE 9 | SE 9 | SE 9 | SE 12 |
| kJ | 8 | 5 | 7 | 8 | 9 | 2 | 3 | 3 | 3 | — | 1 | — | — | — | — | 8 | 12 | 12 | 51 |
Swell 3 Height (m) Direction Period (s) | SE 11 | SE 8 | E 10 | SE 13 | SE 13 | SE 13 | E 12 | S 6 | S 6 | — | — | — | — | — | — | S 15 | SSE 14 | SE 13 | E 3 |
| kJ | 5 | 3 | 2 | 7 | 7 | 7 | 3 | 1 | 1 | — | — | — | — | — | — | 4 | 18 | 27 | 1 |
Wind waves Height (m) Direction Period (s) | SSW 4 | SW 4 | SSW 5 | NW 3 | NW 3 | SW 5 | NE 4 | N 4 | — | S 6 | SSW 6 | S 5 | SSW 7 | NW 3 | WNW 2 | — | NE 3 | E 3 | — |
| kJ | 8 | 22 | 24 | 5 | 2 | 3 | 16 | 2 | — | 20 | 28 | 85 | 239 | 5 | 1 | — | 2 | 2 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 676 | 801 | 68 | 2369 | 1042 | 3406 | 803 | 1664 | 3371 | 1654 | 675 | 1678 | 55 | 0 | 10 | 0 | 52 | 365 | 54 |
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.
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