Surf Forecasts:
Fortress surf forecast from 17 Jul 2026:
- Best quality surf: Wednesday 22 Jul, 11PM (local time) - 6ft (1.8m), 10s period, S swell with offshore winds.
- Most powerful swell: Wednesday 22 Jul, 11PM (local time) - 6ft (1.8m), 10s period, S swell with 627 kJ wave energy.
- Next surfable swell (1★+): Sunday 19 Jul, 11AM (local time) - 3.5ft (1.0m), 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 Sunday (Jul 19) at 11AM. The primary swell is predicted to be 1.0m and 7s period with a secondary swell of 0.1m and 13s. 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 10s and forecast to arrive on Wednesday (Jul 22) at 11PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Sunday (Jul 19) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Sun 19th Jul) | 3.5ft (1.0m) 7s |
| Best Surf | 11PM (Wed 22nd Jul) | 6ft (1.8m) 10s |
| Most Powerful | 11PM (Wed 22nd Jul) | 6ft (1.8m) 10s |
Table - best surf conditions forecast for Fortress over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s break it down in feet and miles for the old-school crew.
We’re looking at a pretty quiet stretch at Fortress for the next two weeks. Not a lot of fire in the ocean, but a couple of days might just be worth the paddle.
The forecast kicks off on Friday, July 17th, but it’s a total dud. Tiny 1ft swell from the south, period so short it’s barely a bump. Wind is messy. The weekend is no better – Saturday, July 18th is a write-off with strong cross-shore wind and lumpy junk.
Sunday, July 19th brings a little pulse: south swell around 4ft with an 8-second period. The combined energy is moderate at 142, and the wind is clean offshore from the WNW. It’s surfable, but nothing to get excited about. Still, if you’re itching to get wet, the morning and afternoon both have that offshore wind.
Monday, July 20th is the real standout. The morning is glassy – dead calm – with a clean 3ft south swell (8-second period) and moderate energy at 119. That’s a rare, clean, glassy session at Fortress. The waves won’t be big, but they’ll be smooth and ridable. Dawn patrol is your best bet.
Wednesday, July 22nd brings some size. The swell jumps to 7ft in the morning, then 7ft in the afternoon, with the combined energy surging to 418 and 731 – a strong push. The period is 7 to 9 seconds, so it’s a windswell, not a clean groundswell. The wind is cross-off, keeping the surface clean, but that’s expert territory for a reef break. Beginners stay away, and even experienced guys need to be careful. The quality is still marginal, so it’s not a classic.
After that, the swell drops and the wind turns onshore or cross-shore for the rest of the month. There’s a slight window on Sunday, July 26th with a 2ft south swell, clean light cross-off wind, and moderate energy at 123 – surfable, but nothing to call home about. The rest of the outlook is a long stretch of poor conditions with small, weak swell and cross-shore winds.
So, the call: Monday, July 20th is the pick for a clean, glassy session on small waves. Wednesday, July 22nd has the most size, but it’s for experts only. The rest is a waiting game.
Rusty.
Short Range ForecastModerate rain (total 13mm), heaviest on Sat night. Warm (max 27°C on Fri afternoon, min 19°C on Sun night). Winds increasing (light winds from the NW on Fri morning, strong winds from the S by Sat night). | Days 4-6 Weather SummaryHeavy rain (total 36mm), heaviest during Tue night. Warm (max 25°C on Wed afternoon, min 19°C on Mon morning). Winds increasing (light winds from the ENE on Mon morning, strong winds from the SW by Tue night). | ||||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | |||||||||||||||
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) | SSW 5 | S 6 | S 5 | SSW 4 | S 5 | SE 13 | S 7 | S 7 | S 7 | S 8 | S 8 | S 7 | S 7 | SE 6 | SSE 6 | SW 7 | SSE 10 | S 9 | SSE 8 | SE 8 | SE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 8 | 15 | 8 | 14 | 50 | 7 | 94 | 83 | 70 | 78 | 57 | 38 | 36 | 49 | 82 | 131 | 497 | 380 | 202 | 82 | 59 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | cross | cross | cross-off | off | off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | cross-off | cross-off | off | cross-off | cross | cross-on |
High Tide | 10:56AM0.95m | 11:08PM0.94m | 11:45AM0.94m | 11:52PM0.85m | 12:33PM0.91m | 00:35AM0.76m | 1:24PM0.88m | 1:18AM0.68m | 2:18PM0.84m | 2:02AM0.61m | 3:18PM0.80m | 2:56AM0.57m | 4:23PM0.79m | 4:16AM0.55m | |||||||
Low Tide | 4:31PM-0.02m | 5:04AM-0.05m | 5:25PM0.05m | 5:44AM0.01m | 6:20PM0.11m | 6:23AM0.07m | 7:21PM0.17m | 7:03AM0.12m | 8:32PM0.22m | 7:48AM0.17m | 9:44PM0.24m | 8:40AM0.20m | 10:46PM0.24m | ||||||||
 | |  | |  |  |  | | | | | | | |  |  | | | |  | | |
 | 5:28 | — | — | 5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — |
 | — | 8:16 | — | — | 8:15 | — | — | 8:15 | — | — | 8:15 | — | — | 8:14 | — | — | 8:13 | — | — | 8:13 | — |
mm | — | — | — | — | 3 | 10 | — | — | — | — | — | — | — | — | 32 | 4 | — | — | — | — | — |
Temp °C | 22 | 27 | 25 | 23 | 23 | 23 | 23 | 27 | 26 | 20 | 22 | 21 | 22 | 22 | 23 | 23 | 25 | 24 | 20 | 22 | 22 |
Feels °C | 19 | 23 | 20 | 23 | 20 | 20 | 20 | 22 | 22 | 18 | 19 | 18 | 21 | 20 | 20 | 20 | 21 | 21 | 19 | 22 | 21 |
Swell 1 Height (m) Direction Period (s) | SSW 5 | SE 8 | S 5 | SE 8 | SE 13 | SE 8 | S 7 | S 7 | S 7 | S 8 | S 8 | S 7 | S 7 | S 7 | E 11 | S 6 | SSE 10 | S 9 | SSE 8 | SE 8 | SE 7 |
| kJ | 8 | 3 | 5 | 3 | 7 | 3 | 94 | 83 | 70 | 78 | 57 | 38 | 36 | 27 | 2 | 94 | 497 | 380 | 202 | 67 | 59 |
Swell 2 Height (m) Direction Period (s) | SE 8 | SE 14 | SE 8 | SE 14 | SE 13 | SE 13 | SE 13 | SE 13 | SE 12 | SE 12 | SE 12 | SE 8 | SE 8 | E 12 | — | SE 9 | E 5 | — | SE 8 | S 8 | S 8 |
| kJ | 3 | 8 | 3 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 3 | 3 | 3 | — | 21 | 2 | — | 67 | 82 | 43 |
Swell 3 Height (m) Direction Period (s) | SE 15 | E 9 | SE 14 | — | E 8 | — | — | — | — | — | SE 12 | SE 12 | SE 12 | S 12 | — | ESE 5 | — | — | — | — | — |
| kJ | 8 | 2 | 8 | — | 1 | — | — | — | — | — | 6 | 6 | 5 | 3 | — | 5 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | S 6 | SW 3 | SSW 4 | S 5 | SSW 5 | WNW 3 | WNW 3 | NNW 3 | NE 3 | ESE 3 | SE 4 | SE 5 | SE 6 | SSE 6 | SW 7 | — | WNW 3 | — | — | — |
| kJ | — | 15 | 3 | 14 | 50 | 90 | 7 | 3 | 1 | 3 | 6 | 8 | 12 | 49 | 82 | 131 | — | 5 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1100 | 668 | 676 | 676 | 241 | 163 | 0 | 0 | 8 | 32 | 38 | 9 | 2383 | 1155 | 210 | 194 | 38 | 0 | 0 | 38 | 32 |
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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