Surf Forecasts:
Fortress surf forecast from 29 Aug 2026:
- Best quality surf: Thursday 3 Sep, 5PM (local time) - 5ft (1.6m), 7s period, SSE swell with cross-offshore winds.
- Most powerful swell: Wednesday 2 Sep, 11AM (local time) - 4.5ft (1.3m), 11s period, SE swell with 382 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 2AM (local time) - 2.5ft (0.7m), 5s period with SSW 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 Monday (Aug 31) at 2AM. The primary swell is predicted to be 0.7m and 5s period with a secondary swell of 0.4m and 8s. 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 1.3m 11s and forecast to arrive on Wednesday (Sep 02) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Sunday (Aug 30) at 8PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 31st Aug) | 2.5ft (0.7m) 5s |
| Best Surf | 5PM (Thu 3rd Sep) | 5ft (1.6m) 7s |
| Most Powerful | 11AM (Wed 2nd Sep) | 4.5ft (1.3m) 11s |
Table - best surf conditions forecast for Fortress over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s on the cards for the next couple of weeks.
To be honest, it’s a slow start. We’re looking at a good stretch of nothing much at all for the first few days. The swell is tiny, the wind is all over the shop, and the wave energy is weak. It’s a bit of a flat spell, but don’t let it get you down – these things never last forever around here.
The first real sign of life comes on Thursday, 3rd September. The swell starts to push up to 5ft - 6ft from the SSE, but the period is short, around 6-7 seconds, so it’s not going to have much grunt. The wind does turn offshore in the afternoon, which is a big plus, and the wave energy climbs to 368 (moderate). The call is for “expect good surf conditions” on the Thursday afternoon, so that’s where you want to be. It’s a bit of a one-day wonder, as the following day it drops right back off.
After that, we’re back into a pretty quiet spell. The wind is mostly cross or onshore, and the swell is mostly under 3ft. You’ll see a few little pulses, but nothing that’s going to get the heart rate up.
Now, the real standout is a long way off, but it’s worth keeping an eye on. Wednesday, 9th September is looking like a proper session. The morning sees a clean, moderate offshore wind from the WNW, with a 3ft SSE swell. But the afternoon is the one. The swell jumps to 6ft from the S, with a period of 10 seconds – that’s some proper groundswell energy. The combined energy hits 877 (strong), and the wind stays clean offshore. The file says “expect very good surf conditions”. This is the pick of the whole forecast.
The water temperature is sitting at 70°, which is perfectly normal for this time of year, so no surprises there.
Fortress is a reef break, and it’s fairly consistent. It gets exposed to the SE swell, which is the optimum direction they’re looking for. The crowds can be an issue here, so for that Wednesday afternoon, expect it to be busy. It’s a beginner-friendly wave, but with that 6ft swell, it’ll be a bit of a step up for the less experienced. It’s not too big for a good crew, though.
So, to sum it up: the first week is mostly a write-off. The best bet is Thursday afternoon, 3rd September for a quick session, but the real one to circle on the calendar is Wednesday afternoon, 9th September. That’s the one with the cleaner, stronger swell and the clean offshore wind. It’s a long way off, so the forecast could shift, but right now, that’s the standout.
Stay patient, and keep your eye on the 9th.
Rusty
Short Range ForecastLight rain (total 9mm), mostly falling on Sun night. Warm (max 24°C on Sun night, min 18°C on Sat morning). Winds decreasing (fresh winds from the SW on Sun night, light winds from the SSE by Mon afternoon). | Days 4-6 Weather SummaryHeavy rain (total 25mm), heaviest during Tue morning. Warm (max 29°C on Thu afternoon, min 19°C on Tue night). Winds decreasing (strong winds from the ESE on Tue night, light winds from the SSW by Thu night). | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | |||||||||||||||
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) | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SSW 5 | S 5 | SE 8 | SE 7 | SSE 7 | SSE 4 | SSE 12 | SE 11 | SE 6 | SE 6 | SSE 6 | SSE 7 | SSE 7 | SSE 7 | SSE 6 | SSE 7 |
Wave Graph | |||||||||||||||||||||
31 | 30 | 24 | 18 | 18 | 29 | 13 | 10 | 14 | 18 | 20 | 353 | 382 | 181 | 137 | 298 | 258 | 120 | 37 | 23 | 27 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | on | on | cross-on | on | cross-on | cross-off | cross-off | cross-on | cross-on | cross-on | cross |
High Tide | 9:07AM0.89m | 9:17PM0.88m | 9:40AM0.92m | 9:54PM0.86m | 10:17AM0.94m | 10:34PM0.82m | 10:59AM0.94m | 11:19PM0.77m | 11:46AM0.94m | 00:10AM0.72m | 12:41PM0.91m | 1:10AM0.68m | 1:47PM0.89m | 2:24AM0.66m | |||||||
Low Tide | 2:55PM0.05m | 3:11AM-0.02m | 3:38PM0.04m | 3:47AM-0.01m | 4:22PM0.05m | 4:26AM0.01m | 5:11PM0.09m | 5:09AM0.04m | 6:06PM0.13m | 5:59AM0.08m | 7:14PM0.16m | 6:57AM0.12m | 8:42PM0.18m | ||||||||
6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | |
— | 7:24 | — | — | 7:23 | — | — | 7:22 | — | — | 7:21 | — | — | 7:19 | — | — | 7:16 | — | — | 7:15 | — | |
mm | — | — | — | — | — | 9 | — | — | — | 13 | 5 | 5 | 2 | — | — | — | — | — | — | — | 4 |
Temp °C | 19 | 22 | 22 | 23 | 23 | 24 | 20 | 22 | 22 | 22 | 22 | 21 | 19 | 20 | 23 | 24 | 29 | 28 | 19 | 20 | 22 |
Feels °C | 16 | 19 | 18 | 22 | 20 | 21 | 21 | 23 | 22 | 21 | 22 | 18 | 14 | 15 | 23 | 24 | 31 | 30 | 18 | 20 | 21 |
Swell 1 Height (m) Direction Period (s) | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SSW 5 | S 5 | SSW 5 | SE 7 | SSW 4 | SE 13 | SE 12 | SE 11 | SE 10 | — | — | SSE 7 | SSE 7 | SSE 7 | SSE 6 | SSE 7 |
31 | 30 | 24 | 18 | 18 | 29 | 13 | 7 | 14 | 2 | 7 | 71 | 114 | 79 | — | — | 258 | 120 | 35 | 23 | 27 | |
Swell 2 Height (m) Direction Period (s) | SSE 7 | S 6 | S 6 | S 6 | — | SE 8 | SE 8 | SE 8 | SSW 5 | SE 14 | SE 10 | — | — | — | — | — | — | — | ESE 8 | ESE 6 | E 8 |
15 | 12 | 6 | 6 | — | 18 | 10 | 10 | 4 | 8 | 4 | — | — | — | — | — | — | — | 37 | 14 | 12 | |
Swell 3 Height (m) Direction Period (s) | E 9 | ENE 4 | E 6 | — | — | SE 8 | N 3 | — | SE 7 | S 10 | — | — | — | — | — | — | — | — | — | SE 8 | SSW 6 |
2 | 2 | 3 | — | — | 18 | 1 | — | 2 | 2 | — | — | — | — | — | — | — | — | — | 11 | 3 | |
Wind waves Height (m) Direction Period (s) | NE 4 | — | WSW 3 | SW 3 | SSW 4 | NNE 2 | — | — | S 4 | SSE 7 | SSE 4 | SSE 12 | SE 11 | SE 6 | SE 6 | SSE 6 | SSW 7 | NW 3 | NNW 3 | SSW 2 | — |
6 | — | 1 | 1 | 26 | 2 | — | — | 4 | 18 | 20 | 353 | 382 | 181 | 137 | 298 | 110 | 2 | 2 | 1 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 668 | 15 | 636 | 1792 | 0 | 10 | 1163 | 1163 | 1163 | 1163 | 122 | 259 | 2521 | 196 | 10 | 0 | 32 | 32 | 209 | 681 |
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.











