Surf Forecasts:
Fortress surf forecast from 20 Sep 2026:
- Most powerful swell: Thursday 24 Sep, 2PM (local time) - 10ft (3.0m), 11s period, E swell with 1,995 kJ wave energy.
Best Forecast Surf Conditions for Fortress this week:
The most powerful waves expected at Fortress in the next 16 days are 3.0m 11s and forecast to arrive on Thursday (Sep 24) at 2PM. 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 Friday (Sep 25) at 11AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Thu 24th Sep) | 10ft (3.0m) 11s |
Table - best surf conditions forecast for Fortress over the next 16 days.
Short Range ForecastModerate rain (total 18mm), heaviest on Sun afternoon. Warm (max 20°C on Sun afternoon, min 12°C on Tue afternoon). Winds increasing (light winds from the SW on Sun night, near gales from the ENE by Wed morning). | Days 5-7 Weather SummaryHeavy rain (total 44mm), heaviest during Thu night. Very mild (max 15°C on Wed afternoon, min 11°C on Thu night). Winds increasing (strong winds from the NE on Wed night, severe gales from the NNE by Fri afternoon). | |||||||||||||||||||
Sun 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | ||||||||||||||
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 4 | SE 5 | SE 9 | ENE 5 | ENE 6 | E 7 | E 7 | E 8 | E 8 | E 10 | E 11 | E 11 | ESE 11 | E 12 | E 12 | E 11 | ESE 10 | E 10 | E 9 | NE 4 |
Wave Graph  | ||||||||||||||||||||
 kJ | 23 | 22 | 26 | 69 | 114 | 366 | 435 | 541 | 1085 | 1553 | 1897 | 1829 | 1510 | 1846 | 925 | 651 | 141 | 68 | 43 | 21 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross-on |
High Tide | 4:10PM0.70m | 4:33AM0.60m | 5:11PM0.73m | 5:35AM0.66m | 5:55PM0.77m | 6:18AM0.73m | 6:32PM0.80m | 6:53AM0.80m | 7:05PM0.84m | 7:24AM0.87m | 7:38PM0.87m | 7:57AM0.94m | 8:15PM0.88m | |||||||
Low Tide | 10:29PM0.28m | 9:44AM0.30m | 11:14PM0.23m | 10:58AM0.25m | 11:48PM0.17m | 11:49AM0.19m | 00:20AM0.11m | 12:32PM0.12m | 00:52AM0.05m | 1:14PM0.06m | 1:26AM0.01m | 1:55PM0.02m | 2:02AM-0.02m | |||||||
 |  |  | |  |  | | | | | | | |  | | | | | | | |
 | — | — | 6:33 | — | — | 6:33 | — | — | 6:35 | — | — | 6:35 | — | — | 6:37 | — | — | 6:37 | — | — |
 | 6:49 | — | — | 6:46 | — | — | 6:45 | — | — | 6:44 | — | — | 6:42 | — | — | 6:39 | — | — | 6:38 | — |
mm | 8 | 4 | — | — | — | 1 | 5 | — | — | — | — | — | — | 22 | 5 | — | 14 | 3 | 2 | — |
Temp °C | 20 | 20 | 15 | 18 | 17 | 16 | 13 | 14 | 15 | 15 | 15 | 15 | 15 | 14 | 12 | 12 | 15 | 15 | 15 | 16 |
Feels °C | 18 | 19 | 9 | 12 | 10 | 8 | 5 | 5 | 5 | 4 | 5 | 4 | 4 | 3 | -3 | -4 | 2 | 2 | 3 | 4 |
Swell 1 Height (m) Direction Period (s) | SE 10 | SE 5 | SE 6 | SE 8 | SE 8 | — | — | — | — | — | — | ESE 11 | ESE 11 | — | E 12 | ESE 11 | ESE 10 | E 10 | E 9 | E 9 |
| kJ | 17 | 22 | 12 | 24 | 37 | — | — | — | — | — | — | 1531 | 1510 | — | 925 | 495 | 141 | 68 | 43 | 14 |
Swell 2 Height (m) Direction Period (s) | ESE 7 | SE 10 | SE 9 | SW 5 | — | — | — | — | — | — | — | — | — | — | — | — | ENE 6 | SE 8 | SE 8 | SE 8 |
| kJ | 5 | 17 | 26 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | 13 | 11 | 3 | 2 |
Swell 3 Height (m) Direction Period (s) | SE 8 | ESE 6 | SW 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SE 10 |
| kJ | 3 | 4 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 |
Wind waves Height (m) Direction Period (s) | SE 4 | — | NE 4 | ENE 5 | ENE 6 | E 7 | E 7 | E 8 | E 8 | E 10 | E 11 | E 11 | NNE 6 | E 12 | NNE 5 | E 11 | — | N 3 | — | NE 4 |
| kJ | 23 | — | 26 | 69 | 114 | 366 | 435 | 541 | 1085 | 1553 | 1897 | 1829 | 105 | 1846 | 35 | 651 | — | 2 | — | 21 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1674 | 10 | 575 | 676 | 676 | 801 | 557 | 1155 | 1117 | 883 | 801 | 801 | 962 | 962 | 818 | 818 | 818 | 681 | 681 | 818 |
Best forecast wave conditions in Long Island New York | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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.
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