Surf Forecasts:
Fortress surf forecast from 10 Aug 2026:
- Most powerful swell: Monday 17 Aug, 2AM (local time) - 6ft (1.8m), 7s period, SSW swell with 285 kJ wave energy.
Best Forecast Surf Conditions for Fortress this week:
The most powerful waves expected at Fortress in the next 16 days are 1.8m 7s and forecast to arrive on Monday (Aug 17) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Friday (Aug 14) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Mon 17th Aug) | 6ft (1.8m) 7s |
Table - best surf conditions forecast for Fortress over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what's on the card for the Fortress. Gotta be straight with you, this is a rough stretch.
Right off the bat, we're looking at a long, dry spell. From Monday the 10th right through to the middle of the month, the surf is just not happening. Tiny, weak, and almost always messy. The energy is barely there, with combined swell energy sitting in the low double digits for most of that time. It's a real bummer.
Things try to get going on Saturday the 16th, but the swell is short period, and there's a strong cross-breeze, so it's all chop and no hope. The water temp is sitting at about 72.7°F, which is pretty much normal for this time of year, so at least there's that.
The first real sign of life comes on Monday the 17th, during the afternoon. We get a bump in swell to 4.6ft from the SSW, with a moderate cross-offshore breeze. The combined energy climbs to 347 (moderate wave energy), but it's still getting a "poor surf conditions" tag. It's a reef break, so it can handle some swell, but the wind is just not quite right.
The next week is a bit of a mixed bag. The swell is small and the period is all over the place. The morning of Monday the 24th is interesting. It's dead glassy, which is a huge plus, but the swell is only 1.0ft from the SE with a long 12-second period. That long period will make it a bit weaker at this beach break, so don't expect any power. The combined energy is only 62 (weak wave energy). It's surfable, but only just.
The best of the bunch, and I mean the only real standout, is Saturday the 22nd afternoon. It's not a classic by any means, but you get a 3.3ft swell from the SE with a clean, glassy surface and a light cross-offshore breeze. The combined energy is 130 (moderate wave energy). It's described as "surfable waves but very ordinary conditions," which is basically the best we're going to get. It's a consistent spot, so it might be worth a look with a longboard.
Honestly, for the next two weeks, the Fortress looks pretty flat. Keep your expectations low and your eyes on the charts.
Short Range ForecastLight rain (total 5mm), mostly falling on Tue night. Warm (max 27°C on Mon night, min 21°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Thu afternoon, min 18°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | |||||||||||||||
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) | S 6 | S 5 | S 6 | S 6 | S 6 | S 5 | S 6 | S 6 | SSW 6 | S 5 | SSE 5 | S 6 | S 6 | S 7 | S 7 | S 8 | S 8 | S 7 | S 7 | S 5 | SSW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 15 | 8 | 18 | 23 | 22 | 15 | 16 | 9 | 12 | 21 | 24 | 22 | 26 | 21 | 34 | 57 | 55 | 38 | 23 | 98 | 285 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross | cross-off | off | cross-off | cross-off | cross | cross-on | cross-off | off | cross-off | cross-off | cross | cross-off | cross | cross | cross | cross-off | cross | cross | cross-off |
High Tide | 6:49PM1.02m | 7:18AM0.85m | 7:42PM1.05m | 8:09AM0.92m | 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 | ||||||||
Low Tide | 11:51AM0.01m | 1:04AM-0.03m | 12:50PM-0.04m | 1:49AM-0.08m | 1:44PM-0.07m | 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 | |||||||
 | |  |  | |  | | |  | | | | | | | | | | | |  | |
 | 5:52 | — | — | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — |
 | — | 7:52 | — | — | 7:52 | — | — | 7:51 | — | — | 7:49 | — | — | 7:47 | — | — | 7:46 | — | — | 7:45 | — |
mm | — | — | — | — | — | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 11 |
Temp °C | 23 | 26 | 27 | 25 | 27 | 24 | 23 | 24 | 24 | 25 | 26 | 26 | 22 | 24 | 23 | 19 | 21 | 22 | 23 | 23 | 23 |
Feels °C | 22 | 24 | 27 | 26 | 26 | 27 | 21 | 24 | 22 | 25 | 25 | 26 | 21 | 24 | 21 | 17 | 18 | 20 | 21 | 20 | 22 |
Swell 1 Height (m) Direction Period (s) | S 6 | SE 10 | S 6 | S 6 | SE 9 | S 5 | S 6 | S 6 | SSW 6 | SE 8 | SE 8 | S 6 | S 6 | S 7 | S 7 | S 8 | S 8 | S 7 | S 7 | SE 9 | — |
| kJ | 15 | 4 | 18 | 23 | 3 | 15 | 16 | 9 | 12 | 3 | 3 | 22 | 26 | 21 | 34 | 57 | 55 | 38 | 23 | 3 | — |
Swell 2 Height (m) Direction Period (s) | SE 10 | E 8 | SE 10 | SE 9 | — | SE 9 | SE 8 | E 4 | SE 8 | SE 14 | SE 13 | ESE 9 | SE 10 | SE 9 | SE 9 | NE 3 | ENE 4 | SE 9 | SE 9 | — | — |
| kJ | 4 | 1 | 4 | 3 | — | 3 | 3 | 1 | 3 | 8 | 7 | 8 | 4 | 3 | 3 | 3 | 2 | 3 | 3 | — | — |
Swell 3 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | — | — | — | E 15 | SE 8 | — | SE 10 | E 10 | SE 13 | SE 13 | E 13 | — | — | SE 9 | — | — | — | — |
| kJ | 1 | 1 | 1 | — | — | — | 4 | 3 | — | 4 | 2 | 7 | 7 | 3 | — | — | 3 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | S 5 | — | — | S 6 | N 3 | NE 3 | — | SSW 3 | S 5 | SSE 5 | — | NW 3 | NW 3 | N 3 | NE 4 | — | SW 3 | SW 3 | S 5 | SSW 7 |
| kJ | — | 8 | — | — | 22 | 1 | 3 | — | 5 | 21 | 24 | — | 3 | 2 | 8 | 4 | — | 5 | 2 | 98 | 285 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 803 | 365 | 65 | 15 | 2521 | 801 | 1783 | 676 | 676 | 15 | 219 | 51 | 15 | 15 | 668 | 2 | 668 | 676 | 676 | 1164 | 38 |
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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