Surf Forecasts:
Fortress surf forecast from 31 Aug 2026:
- Best quality surf: Thursday 3 Sep, 2PM (local time) - 1.5ft (0.5m), 9s period, SE swell with offshore winds.
- Most powerful swell: Wednesday 2 Sep, 2AM (local time) - 5ft (1.6m), 6s period, ESE swell with 195 kJ wave energy.
- Next surfable swell (1★+): Thursday 3 Sep, 2PM (local time) - 1.5ft (0.5m), 9s 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 Thursday (Sep 03) at 2PM. The primary swell is predicted to be 0.5m and 9s period with a secondary swell of 0.5m and 6s. Another secondary swell of 0.9m 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 1.6m 6s and forecast to arrive on Wednesday (Sep 02) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Thursday (Sep 03) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Thu 3rd Sep) | 1.5ft (0.5m) 9s |
| Best Surf | 2PM (Thu 3rd Sep) | 1.5ft (0.5m) 9s |
| Most Powerful | 2AM (Wed 2nd Sep) | 5ft (1.6m) 6s |
Table - best surf conditions forecast for Fortress over the next 16 days.
The Lowdown
Alright, paddle out with me for a sec. Rusty here, looking at the Fortress forecast for the next couple weeks, and I'll level with you, it's a slow period.
The first chunk of the run is a total drought. We've got a week of tiny, weak surf, mostly knee-high or less, and the wind is all over the place, mostly from the wrong direction. It's gonna be lumpy, bumpy, and just plain messy. Water temp is about average for the time of year, so that's not the problem. The problem is just a complete lack of swell.
We do see a pulse mid-week on Wednesday the 2nd. The surf bumps up to around 4-5ft, and the energy level jumps to a moderate 210. But here's the kicker: it's coming from the east-southeast with a weak period of only 6 seconds, and the wind is screaming 30 km/h onshore. That's a wind-blown mess. Frankly, that setup looks more like a kiteboarding day than a surfing day.
The following days just fizzle out again. It's not until Friday the 11th that the wind finally drops offshore, giving us some clean conditions. But the swell is tiny, maybe 3ft, with a super short period. It's surfable, but you'll be scratching for every crumb. That's the best we get before things get interesting.
Saturday the 12th is the one day with some real size. The swell builds to 5ft and the energy is strong, hitting 230 by the afternoon. It's from the south-southwest, which gives us a bit of an offshore angle. But, again, the period is a junky 6 seconds, so it's going to be a bit soft and reformy. Add to that a strong 40 km/h cross-offshore wind, and you've got a powerful, bumpy, and tricky wave. This is strictly for the experts. Anyone else should probably give it a miss.
After that, it's a rapid fade. The rest of the run drops back to small, weak surf. We end up with the waves back down to 1ft and glassy, but you'd be hard-pressed to find a rideable wave.
All in all, the only standout in the whole 16-day window is Saturday the 12th. It's big and powerful, but short-period and wind-affected. For everything else, it's a flat, frustrating stretch. Keep the board in the car, but maybe don't get your hopes up.
Rusty.
Short Range ForecastModerate rain (total 11mm), heaviest on Mon night. Warm (max 23°C on Tue afternoon, min 19°C on Tue night). Winds increasing (light winds from the SE on Mon afternoon, strong winds from the E by Tue night). | Days 4-6 Weather SummaryHeavy rain (total 49mm), heaviest during Thu morning. Warm (max 26°C on Fri night, min 17°C on Sat night). Winds increasing (light winds from the SE on Thu morning, fresh winds from the NE by Sat afternoon). | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
AM | 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) | SE 8 | SE 8 | SE 7 | SE 7 | SE 8 | ESE 6 | ESE 6 | ESE 7 | ESE 6 | SE 9 | SE 9 | ESE 8 | SE 8 | ESE 7 | S 6 | ESE 8 | SSW 6 | NE 5 | NE 6 | ENE 6 | ESE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 10 | 10 | 14 | 12 | 10 | 195 | 151 | 138 | 88 | 39 | 77 | 56 | 16 | 16 | 22 | 12 | 7 | 47 | 92 | 52 | 34 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-off | cross-on | cross-on | cross-on | cross-on | on | on | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-off | cross | cross-on | cross-off |
High Tide | 10:17AM0.94m | 10:34PM0.82m | 10:59AM0.94m | 11:19PM0.77m | 11:46AM0.94m | 00:10AM0.72m | 12:41PM0.91m | 1:10AM0.68m | 1:47PM0.89m | 2:24AM0.66m | 3:10PM0.89m | 3:53AM0.69m | 4:36PM0.91m | ||||||||
Low Tide | 4:22PM0.05m | 4:26AM0.01m | 5:11PM0.09m | 5:09AM0.04m | 6:06PM0.13m | 5:59AM0.08m | 7:14PM0.16m | 6:57AM0.12m | 8:42PM0.18m | 8:08AM0.14m | 10:06PM0.15m | 9:29AM0.13m | 11:08PM0.10m | ||||||||
 |  |  |  |  |  | | | | | |  |  | |  | | |  | | | | |
 | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — |
 | — | 7:22 | — | — | 7:21 | — | — | 7:19 | — | — | 7:16 | — | — | 7:15 | — | — | 7:14 | — | — | 7:12 | — |
mm | — | — | 5 | 1 | 1 | 1 | — | — | 3 | 42 | 1 | 6 | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 21 | 21 | 21 | 23 | 19 | 20 | 20 | 22 | 23 | 24 | 24 | 21 | 25 | 26 | 18 | 20 | 20 | 19 | 21 | 19 |
Feels °C | 19 | 21 | 21 | 22 | 26 | 14 | 16 | 17 | 22 | 23 | 26 | 26 | 22 | 23 | 25 | 14 | 12 | 15 | 15 | 17 | 15 |
Swell 1 Height (m) Direction Period (s) | SSW 5 | SSW 5 | SE 7 | SE 7 | SE 8 | SE 12 | SE 11 | SE 10 | SE 9 | ESE 6 | SE 9 | ESE 8 | ESE 7 | ESE 7 | S 6 | SSW 6 | SSW 6 | S 7 | E 10 | E 10 | E 5 |
| kJ | 8 | 4 | 14 | 12 | 10 | 37 | 58 | 48 | 52 | 28 | 77 | 56 | 15 | 16 | 22 | 8 | 7 | 4 | 19 | 16 | 17 |
Swell 2 Height (m) Direction Period (s) | SE 8 | SE 8 | SSW 4 | SE 14 | SE 13 | SW 4 | SW 4 | SW 5 | SW 5 | SE 9 | E 6 | S 5 | S 5 | SSW 5 | ESE 7 | ESE 8 | E 7 | SE 9 | SSW 7 | S 6 | ESE 10 |
| kJ | 10 | 10 | 2 | 8 | 7 | 1 | 1 | 1 | 1 | 39 | 13 | 18 | 7 | 5 | 9 | 12 | 4 | 3 | 4 | 1 | 34 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | SE 10 | — | — | — | SW 5 | — | — | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | ESE 8 | S 7 | SE 9 | SE 9 | SE 9 |
| kJ | — | — | — | — | 4 | — | — | — | 1 | — | — | 33 | 16 | 11 | 11 | 3 | 6 | 1 | 3 | 3 | 3 |
Wind waves Height (m) Direction Period (s) | — | — | — | ESE 2 | E 3 | ESE 6 | ESE 6 | ESE 7 | ESE 6 | S 4 | SSW 5 | NW 2 | NW 3 | WNW 3 | NW 4 | N 4 | NE 3 | NE 5 | NE 6 | ENE 6 | — |
| kJ | — | — | — | 1 | 2 | 195 | 151 | 138 | 88 | 22 | 40 | 1 | 3 | 2 | 12 | 6 | 3 | 47 | 92 | 52 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 824 | 668 | 273 | 675 | 414 | 325 | 616 | 340 | 244 | 203 | 9 | 2 | 15 | 51 | 51 | 819 | 160 | 182 | 107 | 160 | 9 |
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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