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Fortress Surf Forecast
/ Long Island NY (34 breaks) / New York (44 breaks) /
Surf Forecasts:
Fortress surfForecast / Long Island NY / USA
16 Day Weather and Surf, issued 1 pm Monday 18 May 2026 EDTForecast update in hr min s Forecast update imminent
Fortress surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Fortress sea temperature is
10.2° C
(Which is 1.1°C colder than average for this time of year)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 Wednesday (May 20) at 8PM. The primary swell is predicted to be 1.3m and 6s period with a secondary swell of 0.4m and 9s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Fortress in the next 16 days are 2.1m 8s and forecast to arrive on Sunday (May 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 0.4m 3s period and expected on Thursday (May 21) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Wed 20th May) | 4.5ft (1.3m) 6s |
| Best Surf | 8PM (Wed 20th May) | 4.5ft (1.3m) 6s |
| Most Powerful | 2PM (Sun 24th May) | 7ft (2.1m) 8s |
Table - best surf conditions forecast for Fortress over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 7mm), mostly falling on Wed night. Warm (max 23°C on Mon afternoon, min 12°C on Thu morning). Winds decreasing (strong winds from the SW on Tue night, light winds from the ENE by Thu morning). | Days 5-7 Weather SummaryHeavy rain (total 21mm), heaviest during Sat night. Very mild (max 14°C on Thu afternoon, min 9°C on Sat night). Winds increasing (calm on Fri morning, strong winds from the ENE by Sun morning). | ||||||||||||||||||||
Mon 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | Sunday 24 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
SE 7 | SSW 5 | SSW 6 | SSW 6 | SSW 7 | SSW 7 | SSW 6 | S 6 | SE 9 | SE 9 | S 6 | SE 9 | SE 9 | SE 10 | SE 10 | SE 7 | SE 7 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | |
27 | 56 | 69 | 118 | 204 | 114 | 146 | 68 | 29 | 29 | 28 | 21 | 21 | 15 | 14 | 41 | 276 | 568 | 511 | 452 | 201 | |
Wind (km/h) | |||||||||||||||||||||
cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross-off | glassy | cross | cross-off | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | |
High Tide | 9:59PM1.09m | 10:36AM0.82m | 10:54PM1.04m | 11:34AM0.81m | 11:52PM0.97m | 12:35PM0.80m | 00:51AM0.89m | 1:37PM0.80m | 1:54AM0.81m | 2:41PM0.81m | 2:58AM0.75m | 3:42PM0.83m | 4:01AM0.70m | ||||||||
Low Tide | 3:08PM-0.10m | 4:18AM-0.11m | 4:02PM-0.06m | 5:13AM-0.07m | 4:58PM-0.00m | 6:12AM-0.02m | 6:01PM0.06m | 7:14AM0.02m | 7:15PM0.11m | 8:15AM0.05m | 8:38PM0.14m | 9:12AM0.08m | 9:52PM0.14m | 10:02AM0.09m | |||||||
 |  |  | |  | |  | | |  |  | | |  | |  |  | | | | | |
 | — | — | 5:26 | — | — | 5:24 | — | — | 5:24 | — | — | 5:24 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 |
 | 8:00 | — | — | 8:01 | — | — | 8:02 | — | — | 8:04 | — | — | 8:05 | — | — | 8:06 | — | — | 8:06 | — | 8:07 |
— | 1 | — | — | — | — | 1 | 5 | — | — | — | — | — | — | — | 1 | 18 | 2 | — | — | 3 | |
Temp °C | 23 | 22 | 19 | 21 | 21 | 23 | 23 | 20 | 13 | 14 | 12 | 11 | 12 | 11 | 12 | 12 | 10 | 9 | 10 | 10 | 10 |
21 | 19 | 16 | 18 | 16 | 21 | 19 | 20 | 9 | 9 | 8 | 10 | 8 | 8 | 10 | 9 | 6 | 0 | 2 | 2 | 4 | |
Swell 1 Height (m) Direction Period (s) | SE 7 | SE 8 | SE 8 | SE 8 | SE 9 | SE 9 | SE 9 | S 6 | S 6 | S 6 | SE 9 | S 6 | SE 9 | SE 10 | SE 7 | E 13 | SSE 7 | — | — | ESE 8 | ESE 8 |
 kJ | 27 | 28 | 33 | 25 | 27 | 28 | 29 | 68 | 29 | 29 | 12 | 10 | 21 | 15 | 11 | 4 | 168 | — | — | 328 | 201 |
Swell 2 Height (m) Direction Period (s) | S 18 | SE 13 | SE 13 | SE 16 | SE 16 | SE 15 | SE 15 | SE 9 | SE 9 | SE 9 | E 4 | SE 9 | SSW 5 | S 5 | SE 10 | SE 13 | S 13 | — | — | S 6 | S 6 |
| kJ | 6 | 7 | 7 | 10 | 10 | 9 | 8 | 29 | 20 | 20 | 1 | 21 | 3 | 5 | 14 | 7 | 3 | — | — | 3 | 6 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | SE 14 | S 13 | SE 13 | SE 13 | SE 13 | — | — | — | — | — | SE 16 |
| kJ | — | — | — | — | — | — | — | — | — | — | 8 | 4 | 7 | 7 | 7 | — | — | — | — | — | 10 |
Wind waves Height (m) Direction Period (s) | SSW 4 | SSW 5 | SSW 6 | SSW 6 | SSW 7 | SSW 7 | SSW 6 | NNW 3 | NNE 3 | SSE 2 | S 6 | E 4 | ESE 4 | SW 3 | — | SE 7 | SE 7 | ESE 8 | ESE 8 | ESE 8 | — |
| kJ | 17 | 56 | 69 | 118 | 204 | 114 | 146 | 3 | 1 | 1 | 28 | 1 | 1 | 1 | — | 41 | 276 | 568 | 511 | 452 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 668 | 227 | 183 | 185 | 38 | 185 | 187 | 25 | 25 | 668 | 703 | 15 | 716 | 118 | 123 | 123 | 574 | 582 | 675 | 273 | 649 |
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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