
Surf Forecasts:
Back Strands surf forecast from 10 Sep 2026:
- Best quality surf: Thursday 17 Sep, 7PM (local time) - 5.5ft (1.7m), 12s period, W swell with cross-offshore winds.
- Most powerful swell: Thursday 17 Sep, 1PM (local time) - 6ft (1.9m), 12s period, W swell with 1,027 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 1PM (local time) - 3.5ft (1.0m), 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 1PM. The primary swell is predicted to be 1.0m and 11s period with a secondary swell of 0.4m and 10s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Back Strands in the next 16 days are 1.9m 12s and forecast to arrive on Thursday (Sep 17) at 1PM. 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 4s period and expected on Saturday (Sep 12) at 4AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1PM (Sun 13th Sep) | 3.5ft (1.0m) 11s |
| Best Surf | 7PM (Thu 17th Sep) | 5.5ft (1.7m) 12s |
| Most Powerful | 1PM (Thu 17th Sep) | 6ft (1.9m) 12s |
Table - best surf conditions forecast for Back Strands over the next 16 days.
The Lowdown
G’day, I’m Rusty. Let’s have a look at what’s coming up for Back Strands.
Alright, to be straight with you, the next couple of weeks are a bit of a mixed bag for Back Strands. The first few days are pretty ordinary – we’ve got some swell, but the wind and conditions just aren’t playing ball. The real standout window is looking like Monday the 21st of September, but we’ve got to get through a fair bit of average stuff first.
We start off on Thursday the 10th with a tiny 2ft west swell, period only 8 seconds – that’s short period, weak energy (69), and a south wind blowing 12 mph. The water’s sitting at 61°, which is a touch warmer than normal for this time of year. But the conditions are poor, so not much to get excited about.
Friday the 11th is similar – 4ft west swell, still short period around 8-9 seconds, and cross-shore winds. The combined energy picks up to moderate (245-269), but it’s still messy. No good.
Saturday the 12th sees the swell bump up to 6ft from the west, with a longer period of 12 seconds – that’s a proper groundswell. The energy is strong (963), but the wind is cross to cross-on, with light rain. It’s marginal at best, so not one for the average punter.
Sunday the 13th the swell drops to 4ft from the west-northwest, period 11 seconds, and the wind turns light from the south in the afternoon – cross-off. That’s clean, but the surf is small and ordinary. You might get a few, but it’s nothing to write home about.
Monday the 14th is back to small and weak, with a 2ft west swell and 8-second period. Wind is light cross-off, so it’s clean, but there’s barely any energy (93). Not worth a paddle.
Tuesday the 15th and Wednesday the 16th bring onshore winds and a rising swell – 4ft to 6ft – but it’s all cross-on or onshore, choppy and poor. The energy is moderate to strong (284-641), but the conditions are terrible.
Thursday the 17th we get a 5ft west swell with a 13-second period, strong energy (825), but the wind is onshore. By the afternoon, the wind swings light cross-shore, and the swell pushes 6ft with 12 seconds – energy strong (1010). It’s still only marginal, but the tide could be a factor. Not a standout.
Friday the 18th and Saturday the 19th are a write-off – strong onshore winds, lumpy, and messy. The swell gets up to 8ft on Saturday, but with 25 mph winds, it’s just a mess.
Now, here’s the good bit. Monday the 21st of September is the best we’ve got. Morning starts with a 6ft west-northwest swell, 10-second period, combined energy 694 – that’s strong – and the wind is light from the south, cross-off, keeping it clean. The afternoon gets even better: the swell jumps to 8ft from the west, period 11 seconds, energy 1565 (very strong), and the wind turns offshore from the south-southeast at 12 mph. That’s clean, powerful, and sets up nicely for experienced surfers. This is the standout. Keep in mind, at 8ft, it’s for the crew who know what they’re doing.
Tuesday the 22nd sees a big 10ft swell from the west-northwest with a very long 15-second period, energy 3718, but the wind is strong cross-on from the west-northwest at 25 mph. It’s a messy, powerful beast – better for kites than paddles.
The rest of the week into the 25th stays lumpy with onshore winds and 5ft to 8ft swell, but nothing clean. The 25th Friday morning has a 8ft west-northwest swell with a 10-second period, and the wind is cross-off from the south at 12 mph, so it’s clean, but it’s only marginal due to tide or conditions.
So, for the whole 16-day window, the only real standout is Monday the 21st – especially the afternoon. Get on it if you can, but it’s for the experienced crew.
Rusty.
Short Range ForecastHeavy rain (total 30mm), heaviest during Fri night. Very mild (max 18°C on Sat morning, min 13°C on Thu night). Winds decreasing (fresh winds from the SW on Thu afternoon, light winds from the WNW by Sat night). | Days 4-6 Weather SummaryModerate rain (total 14mm), heaviest on Mon night. Very mild (max 19°C on Mon morning, min 12°C on Tue night). Winds increasing (light winds from the WSW on Sun morning, fresh winds from the NNW by Tue night). | ||||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | |||||||||||||||
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) | W 8 | WSW 12 | W 10 | W 8 | W 9 | WNW 13 | W 12 | WNW 12 | WNW 12 | WNW 11 | WNW 10 | WNW 9 | W 8 | W 11 | W 10 | W 10 | WNW 10 | WNW 11 | WNW 10 | WNW 10 | W 9 |
Wave Graph | |||||||||||||||||||||
58 | 397 | 340 | 245 | 269 | 823 | 963 | 913 | 454 | 260 | 140 | 86 | 48 | 282 | 307 | 279 | 394 | 997 | 641 | 342 | 203 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-on | cross | cross | cross-off | cross | cross-on | on | cross-on | cross-off | cross-off | cross-off | cross | cross-on | cross-on | on | on | on | cross-on | cross |
High Tide | 6:09PM3.85m | 6:36AM3.37m | 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 | ||||||||
Low Tide | 11:47AM0.23m | 00:25AM-0.05m | 12:26PM0.09m | 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 | |||||||
6:56 | — | — | 6:58 | — | — | 7:00 | — | — | 7:01 | — | — | 7:03 | — | — | 7:05 | — | — | 7:07 | — | — | |
— | 8:04 | — | — | 8:00 | — | — | 7:59 | — | — | 7:55 | — | — | 7:53 | — | — | 7:51 | — | — | 7:49 | — | |
mm | 2 | 1 | 1 | — | — | 21 | 2 | 1 | 2 | — | — | — | — | 2 | 11 | 1 | — | — | — | — | 1 |
Temp °C | 16 | 16 | 14 | 15 | 16 | 17 | 18 | 17 | 15 | 13 | 17 | 17 | 19 | 18 | 16 | 15 | 15 | 14 | 14 | 13 | 14 |
Feels °C | 11 | 10 | 10 | 11 | 12 | 14 | 16 | 15 | 14 | 12 | 15 | 14 | 17 | 15 | 16 | 11 | 11 | 8 | 10 | 8 | 10 |
Swell 1 Height (m) Direction Period (s) | W 8 | — | — | W 8 | W 9 | WNW 13 | W 12 | WNW 12 | WNW 12 | WNW 11 | WNW 10 | WNW 9 | W 8 | W 11 | NW 12 | NW 12 | — | WNW 11 | WNW 10 | WNW 10 | — |
58 | — | — | 245 | 269 | 823 | 963 | 913 | 454 | 260 | 140 | 86 | 48 | 282 | 6 | 5 | — | 997 | 641 | 342 | — | |
Swell 2 Height (m) Direction Period (s) | W 11 | — | — | — | — | — | — | — | W 10 | WSW 10 | WSW 9 | NW 13 | NW 9 | NW 13 | — | — | — | — | — | — | — |
10 | — | — | — | — | — | — | — | 70 | 33 | 28 | 7 | 19 | 7 | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | N 7 | — | — | — | — | — | — | — | — | — | — | — | W 12 | — | — | — | — | — | — | — | — |
1 | — | — | — | — | — | — | — | — | — | — | — | 26 | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | S 4 | WSW 12 | W 10 | — | — | S 4 | — | — | — | — | — | S 3 | SSW 3 | — | W 10 | W 10 | WNW 10 | N 10 | — | — | W 9 |
15 | 397 | 340 | — | — | 19 | — | — | — | — | — | 2 | 1 | — | 307 | 279 | 394 | 2 | — | — | 203 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 27 | 234 | 265 | 27 | 7 | 265 | 53 | 27 | 203 | 21 | 0 | 12 | 12 | 89 | 27 | 104 | 830 | 400 | 415 | 313 | 53 |
Best forecast wave conditions in Sligo | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.










