
Surf Forecasts:
Back Strands surf forecast from 11 Sep 2026:
- Best quality surf: Sunday 13 Sep, 7AM (local time) - 4ft (1.2m), 11s period, WNW swell with glassy winds.
- Most powerful swell: Friday 18 Sep, 1AM (local time) - 8ft (2.5m), 12s period, WNW swell with 1,643 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 7AM (local time) - 4ft (1.2m), 11s period with WNW swell.
Best Forecast Surf Conditions for Back Strands this week:
The surf forecast for Back Strands over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 13) at 7AM. The primary swell is predicted to be 1.2m and 11s period with a secondary swell of 0.4m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Back Strands in the next 16 days are 2.5m 12s and forecast to arrive on Friday (Sep 18) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Friday (Sep 18) at 4PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sun 13th Sep) | 4ft (1.2m) 11s |
| Best Surf | 7AM (Sun 13th Sep) | 4ft (1.2m) 11s |
| Most Powerful | 1AM (Fri 18th Sep) | 8ft (2.5m) 12s |
Table - best surf conditions forecast for Back Strands over the next 16 days.
The Lowdown
Alright, grab your board and listen up – Rusty here with a look at what’s coming down the line for Back Strands. We’ve got a bit of a slow start, but the second week is shaping up to be a ripper. Let’s get into it.
The water temperature is sitting at 60°, which is a touch warmer than normal for this time of year – you might not need the thickest wetsuit.
First up, Friday the 11th is a bit of a tease. Friday morning is a write-off with messy 4ft WSW windswell and onshore wind. But Friday afternoon cleans up nicely – we get some 4ft of WNW swell with a cross-offshore breeze making things tidy. It’s small, but it’s a start.
Saturday the 12th brings a pulse of energy – a big 7ft swell from the west, but it’s paired with a strong cross-shore wind and rain. The combined energy jumps to 1126, but the conditions are ugly. Not your day.
Sunday the 13th is your first real window. The morning is clean as a whistle with light offshore winds from the south, and 4ft of WNW swell (279 combined energy). It’s small but fun, and the reef setup at Back Strands should handle that period well. Afternoon stays clean but drops a little.
We then hit a flat, windy stretch from Monday the 14th all the way through to Saturday the 19th. A lot of poor surf, strong winds, and choppy conditions. Not worth paddling out. This gap is almost a full week of dud surf.
Sunday the 20th sees a return to clean, small waves – 3ft WNW swell with light cross-offshore winds (284 combined energy). Not a standout, but a sign things are turning.
Now, here’s the gold. Monday the 21st: the morning kicks off with 6ft of WNW groundswell, period pushing 12 seconds, and clean cross-offshore breeze (861 combined energy). The afternoon goes glassy – 5ft, 12-second period, and zero wind. This is good, clean, proper surf.
But the true standout is Tuesday the 22nd. This is the big one. We’ve got 8ft of west swell with a 13-second period in the morning, and combined energy of 2400. The wind is light offshore from the ESE. This is excellent, powerful, long-period groundswell. However, at 8ft, this one is for experienced surfers only – it’s too big for beginners. The afternoon stays glassy with 8ft waves. Back Strands (reef) will handle this long-period energy beautifully, but expect it to be working. Crowds are possible here.
Wednesday the 23rd is almost as good. The morning has 7ft of WNW swell, clean and light offshore (1277 combined energy). The afternoon goes completely glassy with 7ft waves. Another excellent day.
After that, the swell drops off fast from Thursday the 24th, and we’re back to small, onshore, poor conditions through to the end of the window on the 26th. So, focus your energy on that Monday the 21st through Wednesday the 23rd. That’s your window.
Rusty.
Short Range ForecastLight rain (total 9mm), mostly falling on Fri night. Very mild (max 18°C on Sun afternoon, min 12°C on Sat night). Winds decreasing (fresh winds from the S on Fri night, calm by Sat night). | Days 5-7 Weather SummaryModerate rain (total 17mm), heaviest on Wed night. Warm (max 20°C on Mon afternoon, min 12°C on Tue night). Winds increasing (light winds from the WSW on Wed morning, strong winds from the W by Thu morning). | |||||||||||||||||||
Fri 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | ||||||||||||||
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) | WNW 9 | WNW 13 | W 11 | WNW 12 | WNW 12 | WNW 11 | WNW 10 | WNW 9 | W 8 | W 11 | W 9 | W 10 | WNW 10 | WNW 12 | WNW 11 | W 10 | W 9 | WNW 11 | WNW 11 | WNW 12 |
Wave Graph | ||||||||||||||||||||
276 | 823 | 1126 | 913 | 559 | 260 | 137 | 73 | 28 | 146 | 304 | 434 | 502 | 1259 | 685 | 434 | 854 | 1426 | 1532 | 1643 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | on | on | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-on | on | on | cross-on | cross | cross-on | cross-on | cross-on | cross-on |
High Tide | 6:48PM3.94m | 7:12AM3.45m | 7:25PM3.90m | 7:47AM3.46m | 8:00PM3.74m | 8:20AM3.39m | 8:34PM3.49m | 8:53AM3.26m | 9:08PM3.19m | 9:26AM3.07m | 9:44PM2.87m | 10:03AM2.85m | 10:23PM2.55m | |||||||
Low Tide | 1:01AM-0.11m | 1:03PM0.03m | 1:34AM-0.07m | 1:39PM0.07m | 2:06AM0.07m | 2:15PM0.19m | 2:37AM0.27m | 2:50PM0.39m | 3:07AM0.52m | 3:27PM0.65m | 3:40AM0.79m | 4:07PM0.93m | ||||||||
— | — | 7:00 | — | — | 7:01 | — | — | 7:03 | — | — | 7:05 | — | — | 7:07 | — | — | 7:09 | — | — | |
8:00 | — | — | 7:59 | — | — | 7:55 | — | — | 7:53 | — | — | 7:51 | — | — | 7:49 | — | — | 7:45 | — | |
mm | — | 8 | 1 | — | — | — | — | — | — | 2 | 2 | 2 | 2 | — | — | 2 | 6 | 1 | — | 1 |
Temp °C | 16 | 17 | 17 | 15 | 13 | 14 | 18 | 17 | 18 | 20 | 14 | 14 | 14 | 13 | 14 | 15 | 14 | 14 | 14 | 13 |
Feels °C | 13 | 13 | 13 | 14 | 12 | 13 | 17 | 16 | 16 | 17 | 11 | 8 | 7 | 6 | 9 | 8 | 6 | 5 | 5 | 4 |
Swell 1 Height (m) Direction Period (s) | WNW 9 | WNW 13 | — | WNW 12 | WNW 12 | WNW 11 | WNW 10 | WNW 9 | W 8 | W 11 | W 11 | NW 12 | — | — | WNW 11 | — | — | — | — | — |
276 | 823 | — | 913 | 559 | 260 | 137 | 73 | 20 | 146 | 86 | 5 | — | — | 685 | — | — | — | — | — | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | WSW 10 | W 10 | WSW 9 | WNW 8 | NW 13 | NW 12 | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | 20 | 49 | 27 | 28 | 7 | 6 | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | NW 13 | NW 13 | N 10 | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | 7 | 7 | 2 | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | S 4 | W 11 | — | — | — | — | SSW 3 | SSW 3 | SSW 3 | W 9 | W 10 | WNW 10 | WNW 12 | — | W 10 | W 9 | WNW 11 | WNW 11 | WNW 12 |
— | 18 | 1126 | — | — | — | — | 1 | 1 | 9 | 304 | 434 | 502 | 1259 | — | 434 | 854 | 1426 | 1532 | 1643 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 129 | 53 | 19 | 10 | 0 | 0 | 10 | 27 | 100 | 145 | 145 | 567 | 570 | 53 | 145 | 522 | 1188 | 830 | 1015 |
Best forecast wave conditions in Sligo | ||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||
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Information about the Back Strands Surf forecast
The above surf forecast table for Back Strands provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Back Strands can be found by selecting the local surf guide option on the grey menu. Our Back Strands 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 (Back Strands) 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 Back Strands 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.
Are you planning a holiday in Sligo? If you are looking for accommodation near Back Strands, camping, hotels and holiday cottages in Sligo, consider staying in Sligo which is 19 km (12 miles) away. Other places in and around Sligo where you can find information about places to rent, and car hire include Killybegs which is 21 km (13 miles) away, Enniskillen, Ballina and Letterkenny.










