Surf Forecasts:
Fortress surf forecast from 16 Sep 2026:
- Best quality surf: Sunday 20 Sep, 11PM (local time) - 3ft (0.9m), 6s period, S swell with cross-offshore winds.
- Most powerful swell: Monday 21 Sep, 8PM (local time) - 4.5ft (1.4m), 7s period, E swell with 209 kJ wave energy.
- Next surfable swell (1★+): Sunday 20 Sep, 11PM (local time) - 3ft (0.9m), 6s 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 (Sep 20) at 11PM. The primary swell is predicted to be 0.9m and 6s period with a secondary swell of 0.4m and 10s. Another secondary swell of 1.1m and 4s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Fortress in the next 16 days are 1.4m 7s and forecast to arrive on Monday (Sep 21) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Thursday (Sep 17) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sun 20th Sep) | 3ft (0.9m) 6s |
| Best Surf | 11PM (Sun 20th Sep) | 3ft (0.9m) 6s |
| Most Powerful | 8PM (Mon 21st Sep) | 4.5ft (1.4m) 7s |
Table - best surf conditions forecast for Fortress over the next 16 days.
The Lowdown
Alright crew, Rusty here. Let’s break down what’s happening at the Fortress (reef) for the next couple of weeks. Gotta be honest, the cupboard is pretty bare.
Looking at the whole 16-day run, there’s nothing that’s gonna get you excited. The swell energy is mostly weak, and whenever some size tries to show up, the wind spoils the party. There’s a long stretch of nothing good from the get-go, so don't plan your week around it.
The first tiny glimmer of something rideable doesn't show up until Sunday, September 27th in the morning. We’re talking a small 2ft swell from the ESE with an 8-second period. The energy is moderate (113). What makes this window halfway decent is a light offshore wind from the NW, so the surface should be clean and glassy. But let's be real, it’s just “surfable but very ordinary”. Not a standout.
Before that, it’s all poor conditions. Around the 21st and 24th, the swell bumps up to 6ft and even 7ft, but the wind is a fresh onshore or cross-onshore blowing 19 to 22 mph, making it lumpy and choppy. That’s not a session for a paddle board; that’s more of a kite surfing setup. The energy gets strong (725) on the 24th afternoon, but the wind is ugly.
After that one clean morning on the 27th, it fades back into poor conditions for the final days. The water temp at the start is about 69°, which is normal for this time of year.
Bottom line: no real highlight here. If you’re jonesing for a wave, the 27th morning is your only shot, but keep your hopes in check. It’s a quiet spell.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Fri afternoon, min 16°C on Tue night). Winds increasing (light winds from the S on Tue night, fresh winds from the SW by Thu night). | Days 5-7 Weather SummaryHeavy rain (total 44mm), heaviest during Sun afternoon. Warm (max 21°C on Fri night, min 13°C on Sat morning). Mainly strong winds. | ||||||||||||||||||
Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | ||||||||||||||
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) | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 7 | E 7 | SSW 5 | ESE 12 | NE 4 | E 6 | E 6 | ESE 7 | ESE 4 | S 5 | NE 5 | ENE 6 | E 7 | E 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 8 | 8 | 8 | 11 | 22 | 11 | 8 | 14 | 14 | 13 | 91 | 56 | 47 | 27 | 85 | 94 | 159 | 203 | 156 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-off | cross | cross-off | cross-off | off | cross-off | cross | cross-on | on | cross-on | cross-on | on | cross | cross | cross | cross |
High Tide | 11:06PM0.73m | 11:46AM0.85m | 11:40PM0.67m | 12:26PM0.79m | 00:22AM0.62m | 1:16PM0.74m | 1:14AM0.59m | 2:31PM0.70m | 2:28AM0.57m | 4:10PM0.70m | 4:33AM0.60m | 5:11PM0.73m | |||||||
Low Tide | 4:46AM0.11m | 5:42PM0.20m | 5:24AM0.17m | 6:31PM0.27m | 6:08AM0.23m | 7:37PM0.31m | 7:03AM0.27m | 9:21PM0.31m | 8:15AM0.30m | 10:29PM0.28m | 9:44AM0.30m | 11:14PM0.23m | |||||||
 |  |  | | | |  | | |  | | | |  | |  |  |  | | |
 | — | 6:28 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — |
 | 6:57 | — | 6:55 | — | — | 6:53 | — | — | 6:52 | — | — | 6:50 | — | — | 6:49 | — | — | 6:46 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 14 | 20 | 9 | 1 | — | — |
Temp °C | 16 | 17 | 19 | 21 | 21 | 22 | 22 | 22 | 26 | 21 | 14 | 15 | 16 | 17 | 18 | 20 | 16 | 16 | 16 |
Feels °C | 15 | 15 | 16 | 20 | 21 | 20 | 21 | 22 | 22 | 15 | 9 | 11 | 12 | 13 | 14 | 19 | 9 | 10 | 11 |
Swell 1 Height (m) Direction Period (s) | E 4 | E 5 | E 5 | ESE 8 | ESE 8 | ESE 7 | E 7 | SSW 5 | SSW 5 | ESE 7 | ESE 12 | SE 11 | ESE 11 | — | SE 10 | S 6 | S 6 | S 6 | S 5 |
| kJ | 4 | 2 | 2 | 11 | 22 | 11 | 8 | 13 | 4 | 9 | 13 | 5 | 12 | — | 17 | 35 | 12 | 2 | 2 |
Swell 2 Height (m) Direction Period (s) | ESE 9 | ESE 9 | ESE 9 | SE 13 | SE 13 | SE 12 | SE 12 | ESE 7 | ESE 7 | ESE 12 | S 5 | — | E 9 | — | ESE 7 | SE 9 | SE 9 | S 6 | — |
| kJ | 8 | 8 | 8 | 7 | 6 | 6 | 6 | 10 | 9 | 13 | 1 | — | 2 | — | 5 | 22 | 14 | 5 | — |
Swell 3 Height (m) Direction Period (s) | S 6 | SE 13 | SE 13 | SE 9 | SE 10 | SE 9 | SE 9 | ESE 12 | ESE 12 | SE 9 | — | — | — | — | — | — | ESE 10 | — | — |
| kJ | 1 | 7 | 7 | 3 | 4 | 3 | 3 | 14 | 14 | 3 | — | — | — | — | — | — | 10 | — | — |
Wind waves Height (m) Direction Period (s) | — | — | SSW 3 | SW 3 | SW 3 | SW 3 | SW 4 | — | NW 3 | NE 4 | E 6 | E 6 | ESE 7 | ESE 4 | S 5 | NE 5 | ENE 6 | E 7 | E 7 |
| kJ | — | — | 3 | 3 | 2 | 6 | 19 | — | 2 | 13 | 91 | 56 | 47 | 27 | 85 | 94 | 159 | 203 | 156 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 3406 | 803 | 801 | 1155 | 676 | 193 | 222 | 616 | 15 | 15 | 273 | 160 | 123 | 520 | 574 | 144 | 83 | 34 | 107 |
Best forecast wave conditions in Long Island New York | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Fortress surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest