
Surf Forecasts:
Fortress surf forecast from 5 Aug 2026:
- Best quality surf: Wednesday 5 Aug, 2AM (local time) - 2.5ft (0.7m), 7s period, S swell with cross-offshore winds.
- Most powerful swell: Monday 10 Aug, 2AM (local time) - 4.5ft (1.4m), 6s period, SSW swell with 155 kJ wave energy.
- Next surfable swell (1★+): Wednesday 5 Aug, 2AM (local time) - 2.5ft (0.7m), 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 Wednesday (Aug 05) at 2AM. The primary swell is predicted to be 0.7m and 7s period with a secondary swell of 0.6m and 7s. 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 6s and forecast to arrive on Monday (Aug 10) 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 1.3m 6s period and expected on Sunday (Aug 09) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Wed 5th Aug) | 2.5ft (0.7m) 7s |
| Best Surf | 2AM (Wed 5th Aug) | 2.5ft (0.7m) 7s |
| Most Powerful | 2AM (Mon 10th Aug) | 4.5ft (1.4m) 6s |
Table - best surf conditions forecast for Fortress over the next 16 days.
The Lowdown
Alright, let’s get into it. The next couple of weeks are looking pretty bleak for any real surf, to be honest. We’ve got a long stretch of small, junky waves on the horizon, so you might want to dust off the longboard or find another way to get your salt fix for a while.
The first real window of *anything* doesn’t show up until the upcoming Saturday morning, the 15th. There’s a bump in size with a 5ft south swell, but the period is a short 8 seconds, so it’s not going to have much push. The wind is forecast to be glassy though, which will make it clean. The water temp is sitting at 70°, which is about 2° colder than average for this time of year, so you’ll feel that nip.
Before that, we’re looking at a whole lot of nothing. From Tuesday the 4th right through to Friday the 14th, it’s a wasteland. Wave heights hover around the 2ft to 4ft mark with periods of 6 to 7 seconds, and the energy readings are weak, mostly in double digits. The winds are mostly cross or cross-off, so it’ll be a bit lumpy and messy. There are a couple of mornings with a light offshore wind, like the 9th and 10th, but the swell is just too small and weak to make it worth the paddle. It’s a solid ten-day gap with no good options.
Now, back to that Saturday the 15th. The morning is the standout, purely because of the clean conditions. The 5ft south swell at Fortress (Lisbon) is about the best we’re going to see, but the short period means it’s going to be a bit drifty and not super well-shaped. The energy is moderate at 354, but the wave quality is only rated as “good” by the model, not great. The afternoon sees the swell jump to 7ft and the energy spike to 804, but the wind swings cross-shore and the period stays at 8 seconds, which will make it a chop fest. It’ll be too big and messy for the beginners, and just average for everyone else.
After that, it’s back to the small stuff. Sunday the 16th drops back down to under 3ft, and from Monday the 17th onward, the swell direction shifts to the southeast and the waves become tiny and onshore. The model is showing some energy for the 15th, but it’s a one-hit wonder in an otherwise flat spell. Honestly, the forecast confidence for that Saturday is decent as it’s close, but the long-range outlook is just a reminder that this stretch is a write-off. Keep your expectations low and your hopes high for a change.
Rusty
Short Range ForecastMostly dry. Warm (max 27°C on Fri morning, min 22°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Sun night. Warm (max 30°C on Sun afternoon, min 22°C on Sun night). Winds decreasing (fresh winds from the SW on Sat afternoon, calm by Sun night). | |||||||||||||||||||
Tue 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | ||||||||||||||
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 7 | S 7 | S 7 | S 6 | SE 6 | S 6 | S 6 | SSW 6 | S 6 | SSW 6 | SSW 6 | S 6 | SSW 6 | SSW 6 | S 6 | SSW 6 | SSW 6 | S 7 | S 7 | SSW 7 |
Wave Graph | ||||||||||||||||||||
70 | 48 | 35 | 30 | 21 | 27 | 71 | 112 | 60 | 64 | 66 | 47 | 68 | 51 | 51 | 68 | 155 | 107 | 94 | 73 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-off | cross | cross-off | cross | cross | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | cross-off |
High Tide | 00:24AM0.72m | 12:59PM0.88m | 1:20AM0.68m | 1:59PM0.89m | 2:26AM0.65m | 3:09PM0.90m | 3:44AM0.66m | 4:31PM0.93m | 5:09AM0.69m | 5:47PM0.98m | 6:20AM0.77m | 6:49PM1.02m | ||||||||
Low Tide | 6:22PM0.15m | 6:22AM0.07m | 7:27PM0.17m | 7:17AM0.09m | 8:46PM0.17m | 8:21AM0.10m | 10:10PM0.14m | 9:33AM0.09m | 11:19PM0.09m | 10:45AM0.05m | 00:15AM0.02m | 11:51AM0.01m | 1:04AM-0.03m | |||||||
— | — | 5:47 | — | — | 5:48 | — | — | 5:48 | — | — | 5:50 | — | — | 5:50 | — | — | 5:52 | — | — | |
8:00 | — | — | 7:59 | — | — | 7:58 | — | — | 7:57 | — | — | 7:55 | — | — | 7:54 | — | — | 7:52 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — |
Temp °C | 24 | 23 | 24 | 25 | 25 | 26 | 26 | 26 | 27 | 29 | 28 | 25 | 25 | 27 | 26 | 30 | 28 | 25 | 27 | 29 |
Feels °C | 23 | 22 | 24 | 22 | 27 | 28 | 25 | 26 | 30 | 27 | 27 | 25 | 24 | 28 | 26 | 29 | 27 | 26 | 28 | 30 |
Swell 1 Height (m) Direction Period (s) | S 7 | S 7 | S 7 | S 6 | SE 6 | S 6 | SE 8 | ESE 8 | S 6 | SE 8 | SE 8 | S 6 | SE 8 | SSW 6 | S 6 | SE 8 | SE 10 | S 7 | SE 10 | SSW 7 |
70 | 48 | 35 | 30 | 21 | 27 | 2 | 6 | 60 | 9 | 17 | 47 | 16 | 51 | 51 | 2 | 4 | 107 | 4 | 73 | |
Swell 2 Height (m) Direction Period (s) | SE 7 | SE 7 | SE 6 | SE 7 | S 6 | SE 6 | E 11 | — | SE 8 | E 9 | E 9 | SE 8 | E 9 | SE 7 | SE 8 | — | E 9 | SE 10 | E 8 | SE 10 |
42 | 27 | 34 | 22 | 12 | 9 | 2 | — | 9 | 2 | 2 | 23 | 2 | 8 | 2 | — | 2 | 4 | 1 | 4 | |
Swell 3 Height (m) Direction Period (s) | — | E 12 | — | E 10 | E 10 | SE 8 | — | E 11 | E 10 | — | — | E 9 | — | E 9 | E 11 | E 11 | — | E 9 | — | E 8 |
— | 3 | — | 2 | 2 | 2 | — | 2 | 2 | — | — | 2 | — | 2 | 2 | 2 | — | 1 | — | 1 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | SSW 3 | — | S 6 | SSW 6 | — | SSW 6 | SSW 6 | — | SSW 6 | WNW 2 | — | SSW 6 | SSW 6 | — | S 7 | — |
— | — | — | — | 1 | — | 71 | 112 | — | 64 | 66 | — | 68 | 1 | — | 68 | 155 | — | 94 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 38 | 0 | 0 | 952 | 801 | 187 | 1163 | 38 | 0 | 365 | 38 | 185 | 185 | 10 | 0 | 192 | 32 | 0 | 38 | 10 |
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.











